Academic literature on the topic 'Contrast sensitivity (Vision)'

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Journal articles on the topic "Contrast sensitivity (Vision)"

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Ginsburg, Arthur P. "Contrast Sensitivity and Functional Vision." International Ophthalmology Clinics 43, no. 2 (2003): 5–15. http://dx.doi.org/10.1097/00004397-200343020-00004.

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Amesbury, Eric C., and Steven C. Schallhorn. "Contrast Sensitivity and Limits of Vision." International Ophthalmology Clinics 43, no. 2 (2003): 31–42. http://dx.doi.org/10.1097/00004397-200343020-00006.

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Van Hateren, J. H. "Spatiotemporal contrast sensitivity of early vision." Vision Research 33, no. 2 (January 1993): 257–67. http://dx.doi.org/10.1016/0042-6989(93)90163-q.

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Jaisankar, Durgasri, Marwan Suheimat, Robert Rosén, and David A. Atchison. "Defocused contrast sensitivity function in peripheral vision." Ophthalmic and Physiological Optics 42, no. 2 (December 12, 2021): 384–92. http://dx.doi.org/10.1111/opo.12932.

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Packer, Mark, I. Howard Fine, and Richard S. Hoffman. "Functional Vision, Contrast Sensitivity, and Optical Aberrations." International Ophthalmology Clinics 43, no. 2 (2003): 1–3. http://dx.doi.org/10.1097/00004397-200343020-00003.

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Thomas, C. W., G. C. Gilmore, and F. L. Royer. "Models of contrast sensitivity in human vision." IEEE Transactions on Systems, Man, and Cybernetics 23, no. 3 (1993): 857–64. http://dx.doi.org/10.1109/21.256556.

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Hodkin, Michael J., Marcel M. Lemos, Marguerite B. McDonald, Jack T. Holladay, and Seyed H. Shahidi. "Near vision contrast sensitivity after photorefractive keratectomy." Journal of Cataract & Refractive Surgery 23, no. 2 (March 1997): 192–95. http://dx.doi.org/10.1016/s0886-3350(97)80341-0.

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RABIN, JEFF. "Quantification of color vision with cone contrast sensitivity." Visual Neuroscience 21, no. 3 (May 2004): 483–85. http://dx.doi.org/10.1017/s0952523804213128.

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Human color vision is based fundamentally on three separate cone photopigments. Hereditary color deficiency, which affects up to 10% of males, results from an absorption shift or lack of L or M cone phototoreceptors. While hereditary S cone deficiency is rare, decreased S cone sensitivity occurs early in eye disease, underscoring the importance of quantifying S cone function. Our purpose is to describe a novel approach for quantifying human color vision based on the photopigments of normal color vision. Colored letters, visible to a single cone type, are presented in graded steps of cone contrast to determine the threshold for letter recognition. This approach quantifies normal color vision, indicates type and severity of hereditary deficiency, and reveals sensitivity decrements in various diseases.
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Annadanam, Anvesh, Jiawei Zhao, Jiangxia Wang, and Allen O. Eghrari. "Effects of Contrast Sensitivity on Colour Vision Testing." Neuro-Ophthalmology 41, no. 4 (May 19, 2017): 182–86. http://dx.doi.org/10.1080/01658107.2017.1295273.

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Niemeyer, James E., and Michael A. Paradiso. "Contrast sensitivity, V1 neural activity, and natural vision." Journal of Neurophysiology 117, no. 2 (February 1, 2017): 492–508. http://dx.doi.org/10.1152/jn.00635.2016.

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Contrast sensitivity is fundamental to natural visual processing and an important tool for characterizing both visual function and clinical disorders. We simultaneously measured contrast sensitivity and neural contrast response functions and compared measurements in common laboratory conditions with naturalistic conditions. In typical experiments, a subject holds fixation and a stimulus is flashed on, whereas in natural vision, saccades bring stimuli into view. Motivated by our previous V1 findings, we tested the hypothesis that perceptual contrast sensitivity is lower in natural vision and that this effect is associated with corresponding changes in V1 activity. We found that contrast sensitivity and V1 activity are correlated and that the relationship is similar in laboratory and naturalistic paradigms. However, in the more natural situation, contrast sensitivity is reduced up to 25% compared with that in a standard fixation paradigm, particularly at lower spatial frequencies, and this effect correlates with significant reductions in V1 responses. Our data suggest that these reductions in natural vision result from fast adaptation on one fixation that lowers the response on a subsequent fixation. This is the first demonstration of rapid, natural-image adaptation that carries across saccades, a process that appears to constantly influence visual sensitivity in natural vision. NEW & NOTEWORTHY Visual sensitivity and activity in brain area V1 were studied in a paradigm that included saccadic eye movements and natural visual input. V1 responses and contrast sensitivity were significantly reduced compared with results in common laboratory paradigms. The parallel neural and perceptual effects of eye movements and stimulus complexity appear to be due to a form of rapid adaptation that carries across saccades.
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Dissertations / Theses on the topic "Contrast sensitivity (Vision)"

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Barten, Peter G. J. "Contrast sensitivity of the human eye and its effects on image quality." Bellingham, Wash. (1000 20th St. Bellingham WA 98225-6705 USA) : SPIE, 1999. http://dx.doi.org/10.1117/3.353254.

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Thesis (doctoral)--Technische Universiteit Eindhoven, 1999.
"SPIE digital library." Originally published: Knegsel : HV Press, 1999. Includes bibliographical references and index. Also available in print version.
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Olesko, Brian M. "Dynamic contrast sensitivity : methods and measurements /." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09052009-040416/.

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Drover, James R. "Modification of the infant contrast sensitivity card procedure." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ55503.pdf.

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Ong, Gek-Lim. "Instrumentation for automated contrast-sensitivity and colour-vision tests." Thesis, University of Sussex, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270712.

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Njeru, Steve Murimi Mathenge. "Contrast Sensitivity and Visual Acuity in Low-Vision Students." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586966057072378.

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Midgley, Caroline Ann. "Binocular interactions in human vision." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4839/.

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Early visual processing is subject to binocular interactions because cells in striate cortex show binocular responses and ocular dominance (Hubel & Weisel, 1968). The work presented in this thesis suggests that these physiological interactions can be revealed in psychophysical experiments using normal human observers. In the region corresponding to the blind spot, where binocular interactions differ from areas of the visual field which are represented by two eyes, monocular contrast sensitivity is increased. This finding can be partially explained by an absence of normal binocular interactions in this location (Chapter 2). A hemianopic patient was studied in an attempt to discover whether the effect in normal observers was mediated by either a mechanism in striate cortex or via a subcortical pathway. However, the results were unable to distinguish between these two explanations (Chapter 3).In a visual search task, no difference in reaction time was observed for targets presented to the region corresponding to the blind spot compared with targets presented to adjacent binocularly represented areas of the visual field. Since performance was unaffected by the monocularity of the region corresponding to the blind, pop-out for orientation may be mediated beyond striate cortex where cells are binocularly balanced (Chapter 5). Further support for this contention was provided by studies of orientation pop-out in central vision which found that dichoptic presentation of stimuli did not affect the degree of pop-out obtained and that in general, visual search for a target based solely on eye of origin is impossible (Chapter 6). However, a task that measured orientation difference sensitivity more directly than the search experiments, found that thresholds were higher for dichoptically presented stimuli. This suggests the involvement of neurons that receive a weighted input from each eye. A model of orientation difference coding can account for the results by assuming that the range of inhibition across which orientation differences are coded is narrower for dichoptic stimuli leading to a greater resolvable orientation difference (Chapter 7).
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Croxton, Craig A. "The effects of target orientation on the dynamic contrast sensitivity function." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-09052009-040820/.

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Adams, William F. "The effects of target vibration on the human contrast sensitivity function." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-11102009-020033/.

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Hood, Alison S. "The dependence of binocular contrast sensitivity on binocular single vision." Thesis, University of Glasgow, 1999. http://theses.gla.ac.uk/6253/.

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This study involved the determination of the effects of binocular viewing on contrast sensitivities in 11 normal subjects and in different categories of amblyopes. These were simple anisometropic amblyopes (n=9), micro-esotropic amblyopes with anomalous BSV (n=6), esotropic amblyopes with anomalous BSV (n=3) esotropic without BSV 9n=5), exotropic amblyopes without BSV (n=2) and a group of non-amblyopic strabismics (non-amblyopic esotropes without BSV (n=4); non-amblyopic exotropes without BSV (n=2).An ophthalmic examination was carried out on all individuals. The examination procedures undertaken comprised determination of the visual acuity, subjective refraction, the results of which were confirmed by retinoscopy, and assessment of uniocular fixation patterns. The state of BSV, the direction and magnitude of the angle of deviation, the amplitude of accommodation and pupillary diameter were also determined. The subjects were accordingly placed into the appropriate groups on the basis of the basis of the results of the ophthalmic examination. Measurement of uniocular and binocular contrast sensitivities in response to stationary vertical sinusoidal grating patterns were undertaken. The stimulus display consisted of a Tektronix 5103 cathode ray tube (CRT) with a screen subtense of 2 degrees. Mean contrast threshold values were measured for monocular and binocular viewing over the range of spatial frequencies studied which varied between 8c/deg to 40c/deg depending on the group being examined. The conclusions reached were, first, in individuals with BSV (normal or anomalous), binocular enhancement of contrast sensitivities occurred. However, strabismic amblyopes without BSV and non-amblyopic strabismics without BSV did not exhibit enhanced binocular contrast sensitivities; on the contrary, binocular contrast sensitivities were reduced compared to those obtained through the better eye. Furthermore, when bifoveal stimulation was effected, a further reduction in binocular contrast sensitivity occurred. This study has thus shown that binocular contrast sensitivities are augmented compared with monocular contrast sensitivities when BSV is present, but are decreased when BSV is absent. Furthermore, correction of the angle of squint in strabismics, whether BSV is present or not, further reduces the binocular contrast sensitivities.
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Persaud, Steven S. "Contrast Sensitivity to One- and Two-Dimensional Luminance Patterns." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/9910.

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Contrast sensitivities to one- and two-dimensional luminance patterns were compared in a two-alternative forced choice (2AFC) experiment. Space-averaged luminance was also manipulated. Statistical analyses revealed a main effect of stimulus dimension (p < .05) and no effect of space-averaged luminance. The main effect of stimulus dimension was explained in terms of an on-center, off-center receptive field model combined with watershed spatial vision behavior at spatial frequencies below 1 cycle-per-degree (cpd). The non-significant result for space-averaged luminance was explained by the limited range of manipulation of the variable. Two-dimensional luminance patterns were suggested as ideal patterns for reconciling grating-based spatial vision research with spatial vision behavior in an ecological context. Future research directions are suggested.
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Books on the topic "Contrast sensitivity (Vision)"

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Princeton, Nadler M., Miller David 1931-, and Nadler Daniel J, eds. Glare and contrast sensitivity for clinicians. New York: Springer-Verlag, 1990.

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Leinonen, Markku. Taustan valaistus näkökenttätutkimuksessa =: Background luminance in visual field testing. Turku: Turun yliopisto, 1996.

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Aldo, Badano, and National Institute of Standards and Technology (U.S.), eds. Characterization of luminance probe for accurate contrast measurements in medical displays. Gaithersburg, Md: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2003.

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D, Reising Jack, Armstrong Laboratory (U.S.). Aircrew Training Research Division., Arizona State University. Dept. of Industrial and Management Systems Engineering., and Hughes Training, Inc. Training Operations., eds. Effect of incompatible light on modified Class B night vision goggle-aided visual acuity and contrast sensitivity. Mesa, AZ: Human Resources Directorate, Aircrew Training Research Division, U.S. Air Force Armstrong Laboratory, 1997.

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L, Gilchrist Alan, ed. Lightness, brightness, and transparency. Hillsdale, N.J: L. Erlbaum, 1994.

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David, Miller. Glare and Contrast Sensitivity for Clinicians. Springer London, Limited, 2012.

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Nadler, Daniel J., and Miller David. Glare and Contrast Sensitivity for Clinicians. Island Press, 1989.

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Glare And Contrast Sensitivity For Clinicians. Springer, 2012.

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Barnes, Claire Shelley. Contrast sensitivity of human vision at low luminances. 1988.

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Ong, Gek Lim. Instrumentation for automated contrast-sensitivity & colour-vision tests. 2003.

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Book chapters on the topic "Contrast sensitivity (Vision)"

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Weale, R. A. "Contrast Sensitivity." In Low Vision, 45–55. New York, NY: Springer New York, 1987. http://dx.doi.org/10.1007/978-1-4612-4780-7_4.

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Werner, Annette, Guntram Schwarz, and Walter Paulus. "Ageing and chromatic contrast sensitivity." In Colour Vision Deficiencies XII, 235–41. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0507-1_28.

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Hess, Robert F. "New and Improved Contrast Sensitivity Approaches to Low Vision." In Low Vision, 1–16. New York, NY: Springer New York, 1987. http://dx.doi.org/10.1007/978-1-4612-4780-7_1.

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Rea, Mark S. "Some Basic Concepts and Field Applications for Lighting, Color, and Vision." In Glare and Contrast Sensitivity for Clinicians, 120–38. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4612-3242-1_11.

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Kalmus, H. "Decline of Contrast Perception and Colour Sensitivity with Age." In Colour Vision Deficiencies VIII, 117–20. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-4275-2_16.

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Arden, G. B., J. Wrobleski, S. Bhattacharya, F. Fitzke, C. J. Hogg, A. Eckstein, C. H. Hogg, and A. C. Bird. "Peripheral colour contrast sensitivity in patients with inherited retinal degenerations." In Colour Vision Deficiencies XII, 3–12. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0507-1_1.

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Vaegan, A., A. Banks, A. Gathy, S. Hamer, S. Phonesouk, S. Perry, and M. Capon. "The relationship between colour vision loss, contrast sensitivity loss and aging." In Colour Vision Deficiencies XI, 195–211. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1856-9_21.

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Gonella, Alejandro, and Maria L. F. De Mattiello. "Contrast Sensitivity in Glaucoma: Its Relation to the Loss of Luminosity." In Colour Vision Deficiencies VIII, 423–27. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-4275-2_61.

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Swanson, William H., Ronald L. Fellman, John R. Lynn, and Richard J. Starita. "S-cone contrast sensitivity in glaucoma as a function of mean luminance." In Colour Vision Deficiencies XII, 63–71. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0507-1_9.

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Fusco, R., G. Ambrosio, A. Magli, and G. Nieto. "Colour vision and contrast sensitivity in chronic progressive external ophthalmoplegia." In Documenta Ophthalmologica Proceedings Series, 631–36. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3774-4_76.

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Conference papers on the topic "Contrast sensitivity (Vision)"

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Ginsburg, Arthur P. "Vision channels, contrast sensitivity, and functional vision." In Electronic Imaging 2004, edited by Bernice E. Rogowitz and Thrasyvoulos N. Pappas. SPIE, 2004. http://dx.doi.org/10.1117/12.548289.

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Chwesiuk, Michał, and Radosław Mantiuk. "Measurements of contrast sensitivity for peripheral vision." In SAP '19: ACM Symposium on Applied Perception 2019. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3343036.3343123.

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Thibos, Larry N., and D. L. Still. "Aliasing and contrast sensitivity in peripheral vision." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.tuh3.

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Resolution acuity is often conceived as that spatial frequency for which contrast sensitivity fails to unity. We suspect this is not the case for peripheral vision because recent experiments have shown that peripheral resolution is limited by the ambiguity introduced by aliasing, not by an inability to detect the stimulus.1,2 Since gratings beyond the resolution limit remain highly visible as aliased percepts, we predict that contrast sensitivity for detection will be well above unity at the resolution limit. Using a two-interval forced choice staircase paradigm we measured contrast sensitivity for detection of a 2.3° patch of grating (vs uniform field) displayed on an oscilloscope located 30° into the horizontal nasal visual field and having mean luminance of 80 cd/m2. The resolution limit was separately determined by the method of adjustment as the highest spatial frequency for which perception is veridical and aliasing does not occur.1 We find that peripheral contrast sensitivity has a bandpass characteristic which peaks at ~1.5 c/d and falls monotonically with spatial frequency up to the detection limit of ~20 c/d. The function passes smoothly through the resolution limit of 3.2 c/d, where sensitivity is about an order of magnitude above the absolute threshold of unity.
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Brown, Angela M. "Contrast sensitivity and contrast discrimination in human infants." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.tus3.

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Poor contrast sensitivity is probably responsible for the poor color vision of infants. But, why is their contrast sensitivity poor? Is the deficit sensory, or is it due to perceptual and cognitive immaturities? Or, is it a methodological artifact?
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Sekiguchi, Nobutoshi, and David R. Williams. "Contrast Sensitivity for Isoluminant and Isochromatic Interference Fringes." In Advances in Color Vision. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/acv.1992.fb21.

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There has been recent interest in comparing the efficiency with which chromatic and luminance information is processed in the visual system. This comparison has been made with many different tasks including spatial and temporal contrast sensitivity, stereopsis, motion, and vernier acuity. Performance is generally worse for isoluminant than isochromatic stimuli, which has led to the view that chromatic information is processed less efficiently than luminance information. However, the overlap in the spectral sensitivity of cones limits the the highest contrast that can be realized in the L and M cones with isoluminant stimuli, a limitation that does not apply to isochromatic gratings. We sought to determine how much of the difference between contrast sensitivity for isoluminant and isochromatic stimuli can be attributed to this overlap and how much to post-receptoral factors. It is well established that isoluminant and isochromatic contrast sensitivity differ at low spatial frequencies due to the presence of a low-frequency cut for isochromatic stimuli Our interest was to determine whether the performance at high spatial frequencies is also different.
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Moeys, Diederik Paul, Chenghan Li, Julien N. P. Martel, Simeon Bamford, Luca Longinotti, Vasyl Motsnyi, David San Segundo Bello, and Tobi Delbruck. "Color temporal contrast sensitivity in dynamic vision sensors." In 2017 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE, 2017. http://dx.doi.org/10.1109/iscas.2017.8050412.

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Itoh, Nana, Akira Okamoto, Ken Sagawa, Seiji Mitani, and Tosiaki Yosida. "Considerations of contrast sensitivity function of low vision." In 2009 IEEE 13th International Symposium on Consumer Electronics. IEEE, 2009. http://dx.doi.org/10.1109/isce.2009.5156941.

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Pelli, Denis G., Gary S. Rubin, and Gordon E. Legge. "Predicting the contrast sensitivity of low vision observers." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.tut2.

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We have measured contrast-sensitivity functions for thirty low vision observers and twenty normal observers. Preliminary analysis indicates that when the results are plotted as log contrast sensitivity vs log spatial frequency, every observers’ data can be well described by the same parabolic curve, shifted horizontally and vertically. This means that the entire contrast-sensitivity function may be specified by just two numbers, such as peak contrast sensitivity and the cutoff spatial frequency.
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Schuchard, Ronald A. "Contrast Discrimination in Observers with Vision Loss." In Noninvasive Assessment of the Visual System. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/navs.1992.mb4.

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Many people with vision loss have difficulty identifying objects encountered in common daily experiences. The measurement of contrast thresholds over a range of spatial frequencies (contrast sensitivity function) has been investigated in low vision observers to explain these difficulties and to recommend techniques for better identification by compensating for reduced contrast sensitivity. However, objects encountered in common daily experiences are rarely viewed in low contrast environments. Although contrast discrimination functions have been shown to be similar in shape and superimposed when normalized by the contrast thresholds in normally sighted observers (e.g., Legge and Kersten, 1987), very little is known about the contrast discrimination function for observers with low vision. That is, while the entire contrast discrimination function can be specified by the contrast sensitivity function for a stimulus in normally sighted observers, it is not known whether this relationship is also true for observers with vision loss. Leat and Millodot (1990) report that contrast discrimination and contrast sensitivity are independent in observers with vision loss. Therefore, it is possible that identification of suprathreshold objects has no relationship to the contrast sensitivity function in observers with vision loss (e.g., Rubin and Schuchard, 1990). The characteristics of contrast discrimination functions in observers with vision loss were studied as they related to the contrast sensitivity functions.
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Schäfer, R., P. Kauff, and U. Gölz. "On the Application of Spatio-Temporal Contrast-Sensitivity Functions to HDTV." In Applied Vision. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/av.1989.thc4.

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Spatio-temporal contrast-sensivity functions have been measured by many psycho-pysicists /1,2/ and the published data have been used by TV engineers for various applications. The most attractive property of these functions is the apparent exchangebility between spatial and temporal resolution, which is utilized by many signal compression schemes (e.g. MUSE and HD-MAC). But it is mostly overlooked that this mechanism is only effective under certain viewing conditions and that there is no reduction in the ability to resolve spatial detail, if the eye can follow the movement. The only mechanism which can really be exploited in this situation is motion blur, which is generated by integration and lag of the camera target /3/. Nevertheless we investigated three different topics related to the spatio-temporal behaviour of human vision which will be discussed in the following.
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