Depth Cues
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Three theories for reconciling the linearity of egocentric distance perception with distortion of shape on the ground plane
The focus here is on the paradoxical finding that whereas visually perceived egocentric distance is proportional to physical distance out to at least 20 m under full-cue viewing, there are large distortions of shape within the same range, reflecting a large anisotropy of depth and frontal extents on the ground plane. Three theories of visual space perception
Psychol. Neurosci.. Publicado em: 2014-12
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2. Are first-order disparity gradients spatial primitives of the orientation of lines on the ground plane?
The present study investigated the mechanisms involved in processing orientation on the frontal and ground planes. The stimuli comprised two yellow circles conceived as the endpoints of a segment and depicted on a black background. In Experiment 1, the observers performed two tasks on both planes (frontal and ground). In Task 1 they were asked to indicate th
Psychol. Neurosci.. Publicado em: 2014-12
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3. Comparações de tamanhos sob informações pictóricas de profundidade provenientes de gradientes de textura e horizonte em exposições breves / Size comparisons under effects of pictorial depth cues from texture gradient and horizon in brief exposures.
The aim of this study was to investigate the effects of the duration of pictorial depth cue exposures on perceived sizes of stimuli. For this, 120 volunteers distributed randomly in 12 groups compared two vertical bars, one the test and other the standard, in to order to report which one was bigger. Using the method of constant stimuli, these bars could be p
Publicado em: 2008
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4. The Role of Visuohaptic Experience in Visually Perceived Depth
Berkeley suggested that “touch educates vision,” that is, haptic input may be used to calibrate visual cues to improve visual estimation of properties of the world. Here, we test whether haptic input may be used to “miseducate” vision, causing observers to rely more heavily on misleading visual cues. Human subjects compared the depth of two cylindric
American Physiological Society.
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5. Synchronizing to real events: Subjective audiovisual alignment scales with perceived auditory depth and speed of sound
Because of the slow speed of sound relative to light, acoustic and visual signals from a distant event often will be received asynchronously. Here, using acoustic signals with a robust cue to sound source distance, we show that judgments of perceived temporal alignment with a visual marker depend on the depth simulated in the acoustic signal. For distant sou
National Academy of Sciences.
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6. Explaining the moon illusion
An old explanation of the moon illusion holds that various cues place the horizon moon at an effectively greater distance than the elevated moon. Although both moons have the same angular size, the horizon moon must be perceived as larger. More recent explanations hold that differences in accommodation or other factors cause the elevated moon to appear small
The National Academy of Sciences.
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7. Longitudinal chromatic aberration and emmetropization: results from the chicken eye.
1. Due to the chromatic dispersion of the ocular media, the focal length of the optics of the eye is about 3 diopters longer for red light than for blue light. Because emmetropization in the chicken (Gallus domesticus) does not require colour cues and operates properly in monochromatic light, one can, therefore, expect that chickens raised in red light becom