The Perception of Motion in Chromatic Stimuli

Cropper, Simon J.; Wuerger, Sophie

doi:10.1177/1534582305285120

Cited by 60 publications

(36 citation statements)

References 173 publications

(347 reference statements)

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“…Recent reviews have highlighted the need for some stock to be taken of the data that we already have on motion detection involving relatively simple stimuli (Cropper & Wuerger, 2005;Derrington et al, 2004). Before this can be done, we need to be clear on our definitions, and one useful way of defining this "simple" description is to return to the statistical structure of the stimulus.…”

Section: Context Of the Workmentioning

confidence: 99%

The detection of the motion of contrast modulation: A parametric study

Cropper

Kvansakul

Johnston

2009

Attention, Perception, & Psychophysics

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Section: Context Of the Workmentioning

confidence: 99%

The detection of the motion of contrast modulation: A parametric study

Cropper

Kvansakul

Johnston

2009

Attention, Perception, & Psychophysics

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“…Thus, either the color vision system contributes to motion detection, or a residual difference in luminance could not have been eliminated experimentally (for a review, see ref. 1).…”

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confidence: 99%

Motion vision is independent of color in Drosophila

Yamaguchi

Wolf

Desplan

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

164

141

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Whether motion vision uses color contrast is a controversial issue that has been investigated in several species, from insects to humans. We used Drosophila to answer this question, monitoring the optomotor response to moving color stimuli in WT and genetic variants. In the fly eye, a motion channel (outer photoreceptors R1-R6) and a color channel (inner photoreceptors R7 and R8) have been distinguished. With moving bars of alternating colors and high color contrast, a brightness ratio of the two colors can be found, at which the optomotor response is largely missing (point of equiluminance). Under these conditions, mutant flies lacking functional rhodopsin in R1-R6 cells do not respond at all. Furthermore, genetically eliminating the function of photoreceptors R7 and R8 neither alters the strength of the optomotor response nor shifts the point of equiluminance. We conclude that the color channel (R7/R8) does not contribute to motion detection as monitored by the optomotor response.apparent motion ͉ equiluminance ͉ motion detection ͉ opsin mutants ͉ R7/R8 system T he role of color vision in motion detection is still a matter of debate (for reviews, see refs. 1-3). In human vision, it was widely believed that color and motion are processed by parallel pathways (4). More recently, however, the complete segregation of motion detection and color vision came into question (for a review, see ref.2), because motion of the patterns of two equiluminant colors could still be detected. Thus, either the color vision system contributes to motion detection, or a residual difference in luminance could not have been eliminated experimentally (for a review, see ref. 1).In insects, it was first shown for the fleshfly Phormia that motion vision as monitored by the optomotor response depends on luminance contrast (5). Also in the honey bee, for which color vision is well established (6), the optomotor response has been shown to be largely insensitive to color contrast (7). The same was found for the landing response (8). Similar results were reported in vertebrate systems. In goldfish, which have a tetrachromatic color vision system (9), only L-cones (red) contribute to the optomotor response (10). In zebrafish larvae, both M-and L-cones seem to mediate motion responses, although only luminance information appears to be used (11). These studies clearly show that luminance contrast plays a major role in motion detection, as it does in humans. However, at the point of equiluminance, residual responses are frequently observed (5, 10), leaving the possibility that moving color contrast can, after all, elicit motion responses. So far, it was not possible to selectively switch off the color channel. Here, we used genetic intervention and the detailed knowledge of the Drosophila retina to address whether the color vision system contributes to motion detection.Drosophila has been shown to possess color vision (12, 13). As a prerequisite for this quality, an animal needs at least two types of photoreceptors differing in spectral sensitivity...

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“…On the other hand, the low-level motion mechanism is insensitive to the static component of the luminance pattern [30,46]. It is not very sensitive to chromatic motion signals [19,28] or high-spatial frequency components [25,47], either.…”

Section: Perceptual Processmentioning

confidence: 99%

Deformation Lamps

Kawabe

Fukiage

Sawayama

et al. 2016

ACM Trans. Appl. Percept.

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Light projection is a powerful technique to edit appearances of objects in the real world. Based on pixel-wise modification of light transport, previous techniques have successfully modified static surface properties such as surface color, dynamic range, gloss and shading. Here, we propose an alternative light projection technique that adds a variety of illusory, yet realistic distortions to a wide range of static 2D and 3D projection targets. The key idea of our technique, named 'Deformation Lamps', is to project only dynamic luminance information, which effectively activates the motion (and shape) processing in the visual system, while preserving the color and texture of the original object. Although the projected dynamic luminance information is spatially inconsistent with the color and texture of the target object, the observer's brain automatically combines these sensory signals in such a way as to correct the inconsistency across visual attributes. We conducted a psychophysical experiment to investigate the characteristics of the inconsistency correction, and found that the correction was dependent critically on the retinal magnitude of inconsistency. Another experiment showed that perceived magnitude of image deformation by our techniques was underestimated. The results ruled out the possibility that the effect by our technique stemmed simply from the physical change of object appearance by light projection. Finally, we discuss how our techniques can make the observers perceive a vivid and natural movement, deformation, or oscillation of a variety of static objects, including drawn pictures, printed photographs, sculptures with 3D shading, objects with natural textures including human bodies.

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The Perception of Motion in Chromatic Stimuli

Cited by 60 publications

References 173 publications

The detection of the motion of contrast modulation: A parametric study

The detection of the motion of contrast modulation: A parametric study

Motion vision is independent of color in Drosophila

Deformation Lamps

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