Bibliografías temáticas / Perceived distortion

Literatura académica sobre el tema "Perceived distortion"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 7 de febrero de 2022

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Artículos de revistas sobre el tema "Perceived distortion"

Tong, Jonathan, Robert S. Allison y Laurie M. Wilcox. "The Impact of Radial Distortions in VR Headsets on Perceived Surface Slant". Journal of Imaging Science and Technology 63, n.º 6 (1 de noviembre de 2019): 60409–1. http://dx.doi.org/10.2352/j.imagingsci.technol.2019.63.6.060409.

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Abstract Modern virtual reality (VR) headsets use lenses that distort the visual field, typically with distortion increasing with eccentricity. While content is pre-warped to counter this radial distortion, residual image distortions remain. Here we examine the extent to which such residual distortion impacts the perception of surface slant. In Experiment 1, we presented slanted surfaces in a head-mounted display and observers estimated the local surface slant at different locations. In Experiments 2 (slant estimation) and 3 (slant discrimination), we presented stimuli on a mirror stereoscope, which allowed us to more precisely control viewing and distortion parameters. Taken together, our results show that radial distortion has significant impact on perceived surface attitude, even following correction. Of the distortion levels we tested, 5% distortion results in significantly underestimated and less precise slant estimates relative to distortion-free surfaces. In contrast, Experiment 3 reveals that a level of 1% distortion is insufficient to produce significant changes in slant perception. Our results highlight the importance of adequately modeling and correcting lens distortion to improve VR user experience.

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Hassan, Muhammad, Adithi D. Chakravarthy, Mahadevan Subramaniam, Parvathi Chundi, Mohammad Ali Sadiq, Muhammad Sohail Halim, Rubbia Afridi et al. "Correction of perceived visual distortions using a software application and correlation to age-related macular degeneration". Therapeutic Advances in Ophthalmology 12 (enero de 2020): 251584142091778. http://dx.doi.org/10.1177/2515841420917783.

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Purpose: To investigate the use of software-generated corrections in neutralizing perceived distortions in age-related macular degeneration. Methods: A tablet-based application was utilized to elicit distortions. Five subjects (seven eyes: neovascular age-related macular degeneration and three eyes: non-neovascular age-related macular degeneration) traced the reference lines, and their distortion traces were recorded. To counter distortion, a software-generated trace was re-traced by subjects to produce a corrected trace. Final traces were superimposed on optical coherence tomography images and following distances calculated: (a) dDT: distance between distortion trace and reference line; (b) dGT: distance between software-generated trace and corrected trace; (c) dCT: distance between corrected trace and reference line. Mean percent improvement in distortion was reported. Mean effectiveness of correction was also reported by utilizing t test to compare dDT and dCT. The number of distortion traces with underlying lesions on optical coherence tomography was also analyzed. Results: Mean age of the subjects was 76.6 (±9.5) years. Each patient traced six reference lines and each was considered a separate case. Out of 30 cases, 17 (56.6%) elicited distortion. Mean percent improvement in distortion was 71.3 ± 23% ( p < 0.05). Twelve cases (70.6%) had an underlying lesion (eight cases: disrupted photoreceptor layer and four cases: normal photoreceptor layer). Mean percent improvement in cases with normal photoreceptor layer (90.8 ± 5.45%) was higher than with abnormal photoreceptor layer (58.5 ± 7.17%) ( p < 0.05). Five cases with distortion had no associated underlying lesion. Mean percent improvement in these subjects was significantly higher than those with photoreceptor layer disruption. Conclusion: Software-generated corrections can potentially correct for perceived distortions in patients with age-related macular degeneration, especially in cases with preserved photoreceptor layer.

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Herbst, Jan-Peter. "Distortion and Rock Guitar Harmony". Music Perception 36, n.º 4 (1 de abril de 2019): 335–52. http://dx.doi.org/10.1525/mp.2019.36.4.335.

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Research on rock harmony accords with common practice in guitar playing in that power chords (fifth interval) with an indeterminate chord quality as well as major chords are preferred to more complex chords when played with a distorted tone. This study explored the interrelated effects of distortion and harmonic structure on acoustic features and perceived pleasantness of electric guitar chords. Extracting psychoacoustic parameters from guitar tones with Music Information Retrieval technology revealed that the level of distortion and the complexity of interval relations affects sensorial pleasantness. A listening test demonstrated power and major chords being perceived as significantly more pleasant than minor and altered dominant chords when being played with an overdriven or distorted guitar tone. This result accords with musical practice within rock genres. Rather clean rock styles such as blues or classic rock use major chords frequently, whereas subgenres with more distorted guitars such as heavy metal largely prefer power chords. Considering individual differences, electric guitar players rated overdriven and distorted chords as significantly more pleasant. Results were ambiguous in terms of gender but indicated that women perceive distorted guitar tones as less pleasant than men. Rock music listeners were more tolerant of sensorial unpleasant sounds.

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Jang, Chan Young, Suk-Ju Kang y Young Hwan Kim. "Perceived Distortion-Based Progressive LCD Backlight Dimming Method". Journal of Display Technology 12, n.º 10 (octubre de 2016): 1130–38. http://dx.doi.org/10.1109/jdt.2016.2590140.

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Garaas, T. y M. Pomplun. "Distortion in perceived object size accompanies saccadic adaptation". Journal of Vision 9, n.º 8 (3 de septiembre de 2010): 978. http://dx.doi.org/10.1167/9.8.978.

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Tuan, Kuang-mon y Ronald Jones. "ADAPTATION OF PERCEIVED DIRECTION TO SPECTACLE INDUCED DISTORTION". Optometry and Vision Science 71, Supplement (diciembre de 1994): 61. http://dx.doi.org/10.1097/00006324-199412001-00123.

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Morgan, M. J., I. Mareschal, C. Chubb y J. A. Solomon. "Perceived pattern regularity computed as a summary statistic: implications for camouflage". Proceedings of the Royal Society B: Biological Sciences 279, n.º 1739 (21 de marzo de 2012): 2754–60. http://dx.doi.org/10.1098/rspb.2011.2645.

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Why do the equally spaced dots in figure 1 appear regularly spaced? The answer ‘because they are’ is naive and ignores the existence of sensory noise, which is known to limit the accuracy of positional localization. Actually, all the dots in figure 1 have been physically perturbed, but in the case of the apparently regular patterns to an extent that is below threshold for reliable detection. Only when retinal pathology causes severe distortions do regular grids appear perturbed. Here, we present evidence that low-level sensory noise does indeed corrupt the encoding of relative spatial position, and limits the accuracy with which observers can detect real distortions. The noise is equivalent to a Gaussian random variable with a standard deviation of approximately 5 per cent of the inter-element spacing. The just-noticeable difference in positional distortion between two patterns is smallest when neither of them is perfectly regular. The computation of variance is statistically inefficient, typically using only five or six of the available dots.

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Váša, L. y O. Petřík. "Optimising Perceived Distortion in Lossy Encoding of Dynamic Meshes". Computer Graphics Forum 30, n.º 5 (agosto de 2011): 1439–49. http://dx.doi.org/10.1111/j.1467-8659.2011.02018.x.

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Olofsson, Åke y Martin Hansen. "Objectively measured and subjectively perceived distortion in nonlinear systems". Journal of the Acoustical Society of America 120, n.º 6 (diciembre de 2006): 3759–69. http://dx.doi.org/10.1121/1.2372591.

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Pobloth, Harald y W. Bastiaan Kleijn. "Squared error as a measure of perceived phase distortion". Journal of the Acoustical Society of America 114, n.º 2 (agosto de 2003): 1081–94. http://dx.doi.org/10.1121/1.1594190.

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Tesis sobre el tema "Perceived distortion"

Longster, Jennifer Ann. "Concatenative speech synthesis : a framework for reducing perceived distortion when using the TD-PSOLA algorithm". Thesis, Bournemouth University, 2003. http://eprints.bournemouth.ac.uk/415/.

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This thesis presents the design and evaluation of an approach to concatenative speech synthesis using the Titne-Domain Pitch-Synchronous OverLap-Add (I'D-PSOLA) signal processing algorithm. Concatenative synthesis systems make use of pre-recorded speech segments stored in a speech corpus. At synthesis time, the `best' segments available to synthesise the new utterances are chosen from the corpus using a process known as unit selection. During the synthesis process, the pitch and duration of these segments may be modified to generate the desired prosody. The TD-PSOLA algorithm provides an efficient and essentially successful solution to perform these modifications, although some perceptible distortion, in the form of `buzzyness', may be introduced into the speech signal. Despite the popularity of the TD-PSOLA algorithm, little formal research has been undertaken to address this recognised problem of distortion. The approach in the thesis has been developed towards reducing the perceived distortion that is introduced when TD-PSOLA is applied to speech. To investigate the occurrence of this distortion, a psychoacoustic evaluation of the effect of pitch modification using the TD-PSOLA algorithm is presented. Subjective experiments in the form of a set of listening tests were undertaken using word-level stimuli that had been manipulated using TD-PSOLA. The data collected from these experiments were analysed for patterns of co- occurrence or correlations to investigate where this distortion may occur. From this, parameters were identified which may have contributed to increased distortion. These parameters were concerned with the relationship between the spectral content of individual phonemes, the extent of pitch manipulation, and aspects of the original recordings. Based on these results, a framework was designed for use in conjunction with TD-PSOLA to minimise the possible causes of distortion. The framework consisted of a novel speech corpus design, a signal processing distortion measure, and a selection process for especially problematic phonemes. Rather than phonetically balanced, the corpus is balanced to the needs of the signal processing algorithm, containing more of the adversely affected phonemes. The aim is to reduce the potential extent of pitch modification of such segments, and hence produce synthetic speech with less perceptible distortion. The signal processingdistortion measure was developed to allow the prediction of perceptible distortion in pitch-modified speech. Different weightings were estimated for individual phonemes,trained using the experimental data collected during the listening tests.The potential benefit of such a measure for existing unit selection processes in a corpus-based system using TD-PSOLA is illustrated. Finally, the special-case selection process was developed for highly problematic voiced fricative phonemes to minimise the occurrence of perceived distortion in these segments. The success of the framework, in terms of generating synthetic speech with reduced distortion, was evaluated. A listening test showed that the TD-PSOLA balanced speech corpus may be capable of generating pitch-modified synthetic sentences with significantly less distortion than those generated using a typical phonetically balanced corpus. The voiced fricative selection process was also shown to produce pitch-modified versions of these phonemes with less perceived distortion than a standard selection process. The listening test then indicated that the signal processing distortion measure was able to predict the resulting amount of distortion at the sentence-level after the application of TD-PSOLA, suggesting that it may be beneficial to include such a measure in existing unit selection processes. The framework was found to be capable of producing speech with reduced perceptible distortion in certain situations, although the effects seen at the sentence-level were less than those seen in the previous investigative experiments that made use of word-level stimuli. This suggeststhat the effect of the TD-PSOLA algorithm cannot always be easily anticipated due to the highly dynamic nature of speech, and that the reduction of perceptible distortion in TD-PSOLA-modified speech remains a challenge to the speech community.

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Gray, Ashley A. "An investigation of the effects of perceived feedback accuracy on performance". [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001719.

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Leung, Raymond Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Scalable video compression with optimized visual performance and random accessibility". Awarded by:University of New South Wales. Electrical Engineering and Telecommunications, 2006. http://handle.unsw.edu.au/1959.4/24192.

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This thesis is concerned with maximizing the coding efficiency, random accessibility and visual performance of scalable compressed video. The unifying theme behind this work is the use of finely embedded localized coding structures, which govern the extent to which these goals may be jointly achieved. The first part focuses on scalable volumetric image compression. We investigate 3D transform and coding techniques which exploit inter-slice statistical redundancies without compromising slice accessibility. Our study shows that the motion-compensated temporal discrete wavelet transform (MC-TDWT) practically achieves an upper bound to the compression efficiency of slice transforms. From a video coding perspective, we find that most of the coding gain is attributed to offsetting the learning penalty in adaptive arithmetic coding through 3D code-block extension, rather than inter-frame context modelling. The second aspect of this thesis examines random accessibility. Accessibility refers to the ease with which a region of interest is accessed (subband samples needed for reconstruction are retrieved) from a compressed video bitstream, subject to spatiotemporal code-block constraints. We investigate the fundamental implications of motion compensation for random access efficiency and the compression performance of scalable interactive video. We demonstrate that inclusion of motion compensation operators within the lifting steps of a temporal subband transform incurs a random access penalty which depends on the characteristics of the motion field. The final aspect of this thesis aims to minimize the perceptual impact of visible distortion in scalable reconstructed video. We present a visual optimization strategy based on distortion scaling which raises the distortion-length slope of perceptually significant samples. This alters the codestream embedding order during post-compression rate-distortion optimization, thus allowing visually sensitive sites to be encoded with higher fidelity at a given bit-rate. For visual sensitivity analysis, we propose a contrast perception model that incorporates an adaptive masking slope. This versatile feature provides a context which models perceptual significance. It enables scene structures that otherwise suffer significant degradation to be preserved at lower bit-rates. The novelty in our approach derives from a set of "perceptual mappings" which account for quantization noise shaping effects induced by motion-compensated temporal synthesis. The proposed technique reduces wavelet compression artefacts and improves the perceptual quality of video.

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Durant, Szonya. "A computational and psychophysical study of motion induced distortions of perceived location". Thesis, University College London (University of London), 2004. http://discovery.ucl.ac.uk/1383805/.

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In this thesis I begin by extending previous psychophysical research on the effects of visual motion on spatial localisation. In particular, I measured the perceived spatial shift of briefly presented static objects adjacent to a moving stimulus. It was found that the timing of the presentation of static objects with respect to nearby motion was crucial. I also found a decrease of this motion induced spatial displacement with the increasing distance of static objects from motion, suggesting a local effect of motion. The induced perceptual shift could also be reduced by introducing transient stimuli (flickering dots) in the background of the display. The next stage was to construct a computational model to provide a mechanism that could facilitate such shifts in position. To motivate our combined model of motion computation and spatial representation we considered what functions could be attributed to V1 cells on the basis of their contrast sensitivity functions. I found that functions based on sums of differential of Gaussian operators could provide good fits to previously found V1 data. The properties of V1 cells as derivatives of Gaussian kernel filters on an image were used to build a spatial representation, where position is represented in the weighting of these filter outputs, rather than in a one-to-one isomorphic representation of the scene. This image representation can also be used along with temporal derivatives to calculate motion using the Multi-Channel Gradient Model scheme (Johnston et al, 1992). 1 demonstrate how this framework can incorporate motion signals to produce "in place" shifts of visual location. Finally a combined model of motion and spatial location is outlined and evaluated in relation to the psychophysical data.

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Fulcher, Corinne. "The role of sensory history and stimulus context in human time perception : adaptive and integrative distortions of perceived duration". Thesis, University of Bradford, 2017. http://hdl.handle.net/10454/16063.

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This thesis documents a series of experiments designed to investigate the mechanisms subserving sub-second duration processing in humans. Firstly, duration aftereffects were generated by adapting to consistent duration information. If duration aftereffects represent encoding by neurons selective for both stimulus duration and non-temporal stimulus features, adapt-test changes in these features should prevent duration aftereffect generation. Stimulus characteristics were chosen which selectively target differing stages of the visual processing hierarchy. The duration aftereffect showed robust interocular transfer and could be generated using a stimulus whose duration was defined by stimuli invisible to monocular mechanisms, ruling out a pre-cortical locus. The aftereffects transferred across luminance-defined visual orientation and facial identity. Conversely, the duration encoding mechanism was selective for changes in the contrast-defined envelope size of a Gabor and showed broad spatial selectivity which scaled proportionally with adapting stimulus size. These findings are consistent with a second stage visual spatial mechanism that pools input across proportionally smaller, spatially abutting filters. A final series of experiments investigated the pattern of interaction between concurrently presented cross-modal durations. When duration discrepancies were small, multisensory judgements were biased towards the modality with higher precision. However, when duration discrepancies were large, perceived duration was compressed by both longer and shorter durations from the opposite modality, irrespective of unimodal temporal reliability. Taken together, these experiments provide support for a duration encoding mechanism that is tied to mid-level visual spatial processing. Following this localised encoding, supramodal mechanisms then dictate the combination of duration information across the senses.

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Tsui, Sum-yin y 徐心言. "Local motion in the image plane and in the stereo-depth plane distortsan object's perceived location and spatial arrangement". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38610607.

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Michaud, Pierre-Yohan. "Distorsions des systèmes de reproduction musicale : Protocole de caractérisation perceptive". Phd thesis, Aix-Marseille Université, 2012. http://tel.archives-ouvertes.fr/tel-00806288.

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Ces travaux concernent l'évaluation perceptive de la reproduction sonore. Le but de notre étude est de proposer un protocole permettant la caractérisation perceptive des non-linéarités et des phénomènes de distorsion modifiant le signal reproduit par un système tel qu'une enceinte acoustique. L'élaboration d'un tel protocole nécessite de rassembler de nombreuses enceintes et d'utiliser une méthode d'évaluation adaptée. Nous ne cherchons pas à évaluer la distorsion en terme de qualité globale mais plutôt à estimer les dissemblances perçues entre différentes enceintes distordues afin de révéler, grâce à une analyse multidimensionnelle MDS, les critères sur lesquelles les auditeurs se basent pour les différencier. Dans un premier temps, nous avons utilisé des signaux de synthèse afin de générer des échantillons dont la distorsion est contrôlable. Nous avons ainsi créé un corpus composé de nombreux échantillons distordus simulant ou se rapprochant du fonctionnement d'une enceinte acoustique avec différents types de non-linéarités. Ensuite nous proposons une méthode adaptée à l'évaluation de la dissemblance sur des corpus étendus que nous avons validée à partir de simulations et de tests d'écoute. Enfin, nous avons appliqué cette méthode d'évaluation sur le corpus d'enceintes que nous avons élaboré afin de tester l'utilisation du protocole proposé et de donner quelques résultats préliminaires concernant les dimensions perceptives liées à la distorsion non linéaire.

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Wu, Wei. "Distortions in Perceived Direction of Motion Predicted by Population Response in Visual Cortex". Diss., 2009. http://hdl.handle.net/10161/1152.

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The visual system is thought to represent the trajectory of moving objects in the activity of large populations of cortical neurons that respond preferentially to the direction of stimulus motion. Here I employed in vivo voltage sensitive dye (VSD) imaging to explore how abrupt changes in the trajectory of a moving stimulus impact the population coding of motion direction in ferret primary visual cortex (V1). For motion in a constant direction, the peak of the cortical population response reliably signaled the stimulus trajectory; but for abrupt changes in motion direction, the peak of the population response departed significantly from the stimulus trajectory in a fashion that depended on the size of the direction deviation. For small direction deviation angles, the peak of the active population shifted from values consistent with the initial direction of motion to those consistent with the final direction of motion by progressing smoothly through intermediate directions not present in the stimulus. In contrast, for large direction deviation angles, peak values consistent with the initial motion direction were followed by: a small deviation away from the final motion direction, a rapid 180° jump, and a gradual shift to the final direction. These departures of the population response from the actual trajectory of the stimulus predict specific misperceptions of motion direction that were confirmed by human psychophysical experiments. I conclude that cortical dynamics and population coding mechanisms combine to place constraints on the accuracy with which abrupt changes in direction of motion can be represented by cortical circuits.

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Libros sobre el tema "Perceived distortion"

Longster, Jennifer Ann. Concatenative speech synthesis: A framework for reducing perceived distortion when using the TD-PSOLA algorithm. Poole: Bournemouth University, 2003.

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Ternovaya, Lyudmila. War and peace in a hybrid dimension. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1058362.

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The monograph is devoted to the analysis of the current topic of hybrid war, in which the thin red lines separating it from peaceful life can both turn into an impenetrable iron curtain, and become a bright and attractive advertisement for another country and culture, forcing you to immerse yourself in another world, and not perceive it as a rival. Neither international law, nor the tools for identifying all the figures of international relations involved in resolving issues of war and peace, nor culture can correct the mutual distortions of hybrid war and hybrid peace. And yet, it is possible to find such facts that help to remove hybrid layers and reach the true interests, goals and means of those geopolitical actors who benefit from such a complex hybrid game of war and peace. It is intended for specialists in the field of international relations, history, culture. It will also arouse the interest of a wide range of readers.

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Anderson, Kym. Food Price and Trade Policy Biases. Editado por Ronald J. Herring. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780195397772.013.009.

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This article demonstrates how governments have distorted food markets in high-income countries, primarily through ineffective trade policies. It begins by reviewing theories on agriculture’s perceived role in development. It then considers a recent World Bank study, which presents evidence of price-distorting policies in both high-income and developing countries. Next, it discusses the contribution of agriculture to the current global welfare cost of distortions to farm and nonfarm goods markets, and the impact of those distortionary policies on income inequality and poverty. The article concludes by assessing the policy implications of the study’s empirical findings.

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Kynes, Will. An Obituary for "Wisdom Literature". Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198777373.001.0001.

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In the rise of Wisdom Literature in less than a century from obscurity to ubiquity, a number of crucial questions have been left unanswered. Most fundamentally, when, how, and why did the category, comprised essentially of Proverbs, Ecclesiastes, and Job, develop? The definitional issues long plaguing Wisdom scholarship can be traced to that unquestioned “universal consensus.” This book unearths its origin, describes its distorting effect, and proposes an alternative approach. Absent from early Jewish and Christian interpretation, the Wisdom category first emerged in modern scholarship, with the traits associated with it, such as universalism, humanism, rationalism, and secularism, suspiciously mirroring the ideals of its nineteenth-century German birthplace. Since it was originally assembled to reflect modern values, biblical scholars have struggled to define the corpus on any other basis or integrate it into the theology of the Hebrew Bible. The problem, however, is not only why the texts were perceived in this way, but that they are perceived in only one way at all. This book builds on recent literary and cognitive theory to create an alternative approach to genre that integrates hermeneutical insight from various genre groupings. This theory is then applied to Job, Ecclesiastes, and Proverbs, mapping out the complex intertextual network contributing to each book’s meaning. Seen from multiple perspectives, these texts emerge in three dimensions, as facets previously obscured by the category are illuminated once again. The death of the Wisdom Literature category offers new life to both the so-called Wisdom texts and the concept of wisdom.

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Capítulos de libros sobre el tema "Perceived distortion"

Prévoteau, Jessica, Sylvia Chalençon-Piotin, Didier Debons, Laurent Lucas y Yannick Remion. "Improving 3D Visual Experience by Controlling the Perceived Depth Distortion". En Signals and Communication Technology, 371–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12802-8_16.

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Kuroki, Scinob. "The Arm’s Blind Line: Anisotropic Distortion in Perceived Orientation of Stimuli on the Arm". En Haptics: Science, Technology, Applications, 167–75. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58147-3_19.

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Köppl, Sonja, Markus Hellmann, Klaus Jostschulte y Christian Wöhler. "Evaluation of the Individually Perceived Quality from Head-Up Display Images Relating to Distortions". En Analysis of Large and Complex Data, 265–74. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-25226-1_23.

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Hernandez, Ariel Macaspac. "Knowledge Diplomacy as Facilitator of Transformation Towards Sustainability—The “New Diplomacy” and Consensual Knowledge". En Taming the Big Green Elephant, 87–103. Wiesbaden: Springer Fachmedien Wiesbaden, 2020. http://dx.doi.org/10.1007/978-3-658-31821-5_5.

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AbstractNegotiations over the best way to address climate change and sustainable development are heavily dependent on input from scientific and expert communities. While policy-makers seek to rationalize and thereby legitimate their decisions through evidence-based decisions frameworks, this unprecedented reliance on scientific knowledge has inadvertently led to a perceived erosion of state authority and a weakening of democracy. It has been strongly suggested that the use of scientific knowledge in policy-making is reducing the demand or need for concordant consensus-building, or distorting deliberation processes through the emergence of new forms of dependency.

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Nieuwland, Joachim y Franck L. B. Meijboom. "“Eek! A Rat!”". En The International Library of Environmental, Agricultural and Food Ethics, 301–22. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63523-7_17.

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AbstractRats are often despised. In what way does such aversion affect moral deliberation, and if so, how should we accommodate any distorting effects on our normative judgements? These questions are explored in this chapter with regard to recent proposals in (1) the ethics of pest management and (2) animal political theory. While ethical frameworks and tools used in the context of animal research can improve moral deliberation with regard to pest management, we argue based on psychological factors regarding the perception of rats that before implementing these methods in either animal research or pest management, one needs to ascertain that rats are owed genuine moral consideration. With regard to animal political theory, we identify three issues: truth-aptness, perception, and moral motivation. To complement as well as address some of the issues found in both animal research ethics and animal political theory, we explore compassion. Starting from compassion, we develop a pragmatist and interspecies understanding of morality, including a shift from an anthropocentric to a multispecies epistemology, and a distributed rather than an individual notion of moral agency. We need to engage with the experience of others, including rats and those who perceive these animals as pests, as well as pay attention to the specific way individual agents are embedded in particular socio-ecological settings so as to promote compassionate action.

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Dickinson, Laura A. "In Defense of Accountability as a Lens to Perceive Privatization’s Problems". En Privatization, 30–51. NYU Press, 2018. http://dx.doi.org/10.18574/nyu/9781479842933.003.0003.

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This chapter responds to Debra Satz’s paper. It argues that a more expansive conception of accountability, which addresses the structural transformation of governance, includes concerns about distortion and equality. Through examples of security and military privatization, Dickinson maintains that such privatization has enabled the expansion of executive power and the fragmentation and diffusion of governmental authority, threats to accountability with serious consequences for democracy.

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Niu, Yaqing, Sridhar Krishnan y Qin Zhang. "Spatio-Temporal Just Noticeable Distortion Model Guided Video Watermarking". En Crime Prevention Technologies and Applications for Advancing Criminal Investigation, 66–84. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-1758-2.ch006.

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Perceptual Watermarking should take full advantage of the results from human visual system (HVS) studies. Just noticeable distortion (JND), which refers to the maximum distortion that the HVS does not perceive, gives a way to model the HVS accurately. An effective Spatio-Temporal JND model guided video watermarking scheme in DCT domain is proposed in this paper. The watermarking scheme is based on the design of an additional accurate JND visual model which incorporates spatial Contrast Sensitivity Function (CSF), temporal modulation factor, retinal velocity, luminance adaptation and contrast masking. The proposed watermarking scheme, where the JND model is fully used to determine scene-adaptive upper bounds on watermark insertion, allows providing the maximum strength transparent watermark. Experimental results confirm the improved performance of the Spatio-Temporal JND model. The authors’ Spatio-Temporal JND model is capable of yielding higher injected-watermark energy without introducing noticeable distortion to the original video sequences and outperforms the relevant existing visual models. Simulation results show that the proposed Spatio-Temporal JND model guided video watermarking scheme is more robust than other algorithms based on the relevant existing perceptual models while retaining the watermark transparency.

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Aidoo-Buameh, Julius, Philip Ayagre y Ernest Bruce-Twum. "Usage of E-Zwich Among Students in Developing Countries". En Advances in Marketing, Customer Relationship Management, and E-Services, 48–63. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8015-7.ch004.

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E-Zwich payment system is the innovative method for improving accessibility to banking and retail services in Ghana, though some have predicted its failure despite some schools officially signing up to it. Government's attempts at mainstreaming this cashless system into national statistical economic data are stifled with data distortions. The chapter looks at how acceptable the E-Zwich system is among students and the possible factors that would drive its sustainability by determining plausibility of relationships among the network of variables. The study concludes that signing on to the E-Zwich facility and owning a card for a long time does not necessarily translate into perceived usefulness, but builds usage experience and efficiency, thereby reducing user complaints. Unattended challenges/complaints hampers cash mobilization to short change the cashless agenda among the youth.

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Camasso, Michael J. y Radha Jagannathan. "Cultural Orientations and Economic Outcomes". En Caught in the Cultural Preference Net, 1–15. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780190672782.003.0001.

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In this introduction, the authors discuss the limitations that arise when economic failures like youth unemployment are perceived and studied as simply a market supply or demand problem. Rather than the result of poor choices, poor information, or market distortions, a growing body of evidence has indicated that cultural value orientation may influence economic preferences in a fashion captured by the Bourdieu paradox: while an economic calculation lies behind every action, every action cannot be reduced to an economic calculation. To address this paradox and its economic implication, the authors set out to answer three questions: (a) Do some national cultures hold on to value orientations that are more successful than others in promoting economic opportunity? (b) Does the transmission of these value orientations demonstrate stability, regardless of economic conditions? and (c) Do value orientations exert their influence on economic behaviors through stated preferences?

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Enokela, Abel Ebiega. "School Shootings and Therapeutic Interventions for Traumatized Victims". En Advances in Educational Marketing, Administration, and Leadership, 140–63. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-5200-1.ch008.

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This study attempts an encapsulation of school shooting as a strand of mass violence with the purpose of presenting a perceived effective approach that could be therapeutically adopted for handling traumatized victims of school shooting incidents, particularly traumatized students. School violence involving firearms and high fatalities have been trending in many parts of the world. Pathetically, most of the students who are victims of school shootings receive inadequate or no therapeutic interventions that could help them to recover from the emotional trauma that usually accompany school violence. Students with trauma symptoms experience dysfunctional adaptation, leading to impairment of daily functionality, distortions in peer interactivity, and disruptive self-expressivity. This study leans on family system theory and elucidates how the application of this theory could help the traumatized to regain themselves psychosocially in order to maintain adaptation to function properly in the school or community.

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Actas de conferencias sobre el tema "Perceived distortion"

Sermadevi, Yegnaswamy, Mark Masry y Sheila S. Hemami. "MINMAX rate control with a perceived distortion metric". En Electronic Imaging 2004, editado por Sethuraman Panchanathan y Bhaskaran Vasudev. SPIE, 2004. http://dx.doi.org/10.1117/12.527254.

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Ogawa, Nami, Takuji Narumi y Michitaka Hirose. "Distortion in perceived size and body-based scaling in virtual environments". En AH '17: 8th Augmented Human International Conference. New York, NY, USA: ACM, 2017. http://dx.doi.org/10.1145/3041164.3041204.

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Zhang, Zhuohuang, Donald S. Williamson y Yi Shen. "Investigation of Phase Distortion on Perceived Speech Quality for Hearing-Impaired Listeners". En Interspeech 2020. ISCA: ISCA, 2020. http://dx.doi.org/10.21437/interspeech.2020-1481.

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Dong-Gon Yoo y Young Hwan Kim. "Perceived distortion aware backlight dimming for low power and high quality LCD devices". En 2013 IEEE International Conference on Consumer Electronics (ICCE). IEEE, 2013. http://dx.doi.org/10.1109/icce.2013.6486940.

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Doyen, D., J. J. Sacré y L. Blondé. "Correlation between a perspective distortion in a S3D content and the visual discomfort perceived". En IS&T/SPIE Electronic Imaging, editado por Andrew J. Woods, Nicolas S. Holliman y Gregg E. Favalora. SPIE, 2012. http://dx.doi.org/10.1117/12.906735.

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Ling, Suiyi y Patrick Le Callet. "How to Learn the Effect of Non-Uniform Distortion on Perceived Visual Quality? Case Study Using Convolutional Sparse Coding for Quality Assessment of Synthesized Views". En 2018 25th IEEE International Conference on Image Processing (ICIP). IEEE, 2018. http://dx.doi.org/10.1109/icip.2018.8451151.

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Defoe, J. J. y Z. S. Spakovszky. "Shock Propagation and MPT Noise From a Transonic Rotor in Non-Uniform Flow". En ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-45645.

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One of the major challenges in hig4h-speed fan stages used in compact, embedded propulsion systems is inlet distortion noise. A body-force-based approach for the prediction of multiple-pure-tone (MPT) noise was previously introduced and validated. In this paper, it is employed with the objective of quantifying the effects of non-uniform flow on the generation and propagation of MPT noise. First-of-their-kind back-to-back coupled aero-acoustic computations were carried out using the new approach for conventional and serpentine inlets. Both inlets delivered flow to the same NASA/GE R4 fan rotor at equal corrected mass flow rates. Although the source strength at the fan is increased by 45 dB in sound power level due to the non-uniform inflow, far-field noise for the serpentine inlet duct is increased on average by only 3.1 dBA overall sound pressure level in the forward arc. This is due to the redistribution of acoustic energy to frequencies below 11 times the shaft frequency and the apparent cut-off of tones at higher frequencies including blade-passing tones. The circumferential extent of the inlet swirl distortion at the fan was found to be 2 blade pitches, or 1/11th of the circumference, suggesting a relationship between the circumferential extent of the inlet distortion and the apparent cut-off frequency perceived in the far field. A first-principles-based model of the generation of shock waves from a transonic rotor in non-uniform flow showed that the effects of non-uniform flow on acoustic wave propagation, which cannot be captured by the simplified model, are more dominant than those of inlet flow distortion on source noise. It demonstrated that non-linear, coupled aerodynamic and aero-acoustic computations, such as those presented in this paper, are necessary to assess the propagation through non-uniform mean flow. A parametric study of serpentine inlet designs is underway to quantify these propagation effects.

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Lin, Guosong, Muammer Koc¸, S. Jack Hu y Wayne Cai. "Three-Dimensional Numerical Simulations of Curved Edge-Curved Surface Hemming of Aluminum Alloy". En ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60705.

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Hemming is a manufacturing process to fold a sheet onto itself or another sheet. The dimensional defects (roll-in/rollout, warp/recoil, distortion due to springback, etc.) of hems critically impact the perceived quality of automotive exteriors. This paper summarizes the procedures and the results of three-dimensional (3D) numerical simulations on curved edge-curved surface hemming of aluminum alloy AA6111-T4PD. A solid-element model is built in ABAQUS using explicit quasi-static finite element (FE) procedure for flanging, pre-hemming and final hemming, and implicit procedure for the corresponding preloading and resulting springback at high simulation cost. Aiming at improving the computational efficiency, various approaches have been taken and tested including using shell elements as alternatives, developing simplified simulation procedure by combining pre- and final hemming in explicit scheme, and further simplification by neglecting intermediate springback analysis. The same conditions are analyzed using shell elements in LS-DYNA, but only final hemming springback is considered. The results of the simplified models are compared with the results of ABAQUS solid-element model with complete procedure. Both accuracy and efficiency of the models are presented and discussed.

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Colombet, Florent, Damien Paillot, Fre´de´ric Me´rienne y Andras Kemeny. "Enhancement of the SAAM Driving Simulator Graphics Pipeline for Speed Perception Studies". En ASME 2011 World Conference on Innovative Virtual Reality. ASMEDC, 2011. http://dx.doi.org/10.1115/winvr2011-5579.

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This paper presents a speed perception study focusing on the impact of a visual scale factor. This factor corresponds to the ratio between the geometric field of view (of the camera) and the driver’s field of view covered by the screen. 20 participants have reproduced 2 speeds (50 and 90 km/h) without knowing the numerical values of these consigns, and with 5 different visual scale factors: 0.70, 0.85, 1.00, 1.15 and 1.30. We show that this visual factor has a significant impact on the speed reached by the subjects and that the variation of perceived speed can be deducted from the used visual scale factor. To be able to conduct this experiment, we had first to solve an image correction issue. As the visual display is projected on a cylindrical screen, a distortion correction must be performed. This correction is dependent on the viewer’s position and so is also dependent on the visual scale factor. We had then to improve our image warping approach to be able to take into account in real time the observer’s position (which was not the case until now). This paper presents a concise state of the art about image correction and some details about the implementation of the chosen algorithm.

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Tehrani, Mahdi Abbaspour, Aditi Majumder y M. Gopi. "Correcting perceived perspective distortions using object specific planar transformations". En 2016 IEEE International Conference on Computational Photography (ICCP). IEEE, 2016. http://dx.doi.org/10.1109/iccphot.2016.7492868.

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Informes sobre el tema "Perceived distortion"

Fernandez, Katya y Cathleen Clerkin. The Stories We Tell: Why Cognitive Distortions Matter for Leaders. Center for Creative Leadership, junio de 2021. http://dx.doi.org/10.35613/ccl.2021.2045.

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"This study explored whether leaders’ thought patterns (specifically cognitive distortions) and emotion regulation strategies (specifically cognitive reappraisal, cognitive defusion, and expressive suppression) relate to their work experiences. Findings suggest that leaders’ cognitive distortions are related to their work experiences and that emotion regulation strategies can help leaders mitigate the effects of cognitive distortions. More specifically, the results of this study offer the following insights: • Leaders’ cognitive distortions related to all examined workplace topics (role ambiguity, role conflict, social support, perceived organizational support, job satisfaction, and burnout). • Leaders’ use of emotion regulation strategies (cognitive reappraisal and cognitive defusion) mitigated the impact their cognitive distortions had on burnout, specifically. • Attempting to suppress emotional responses was relatively ineffective compared to the other two emotion regulation strategies (cognitive reappraisal and cognitive defusion). These insights suggest that certain emotion regulation strategies may be helpful in ameliorating the deleterious effects of cognitive distortions on leaders’ burnout. The current paper provides an overview of the different cognitive distortions and emotion regulation strategies explored and includes advice on what leaders can do to more effectively notice and manage cognitive distortions that emerge during distressing situations. "

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