What is binocular disparity?
نویسنده
چکیده
What are the geometric primitives of binocular disparity? The Venetian blind effect and other converging lines of evidence indicate that stereoscopic depth perception derives from disparities of higher-order structure in images of surfaces. Image structure entails spatial variations of intensity, texture, and motion, jointly structured by observed surfaces. The spatial structure of binocular disparity corresponds to the spatial structure of surfaces. Independent spatial coordinates are not necessary for stereoscopic vision. Stereopsis is highly sensitive to structural disparities associated with local surface shape. Disparate positions on retinal anatomy are neither necessary nor sufficient for stereopsis.
منابع مشابه
The process of stereoscopic perception: A magnetoencephalographic study
Binocular disparity is one of many clues to perceive depth. Random-dot stereograms (RDS) designed by Julesz [1] enables us to make visual stimuli that exclusively have binocular disparity as a depth clue. Many physiological studies were done about visual cortical neurons which respond to binocular disparity [2], but it is still not clear what large-scale activity of such neurons detects corresp...
متن کاملStereopsis in the Presence of Binocular Disparity
Abstract The strongest evidence that pictorial cues contribute to stereopsis is the fact that the visual system appears to integrate both pictorial cues (such as perspective and shading) and optical cues (such as binocular disparity) into a single coherent percept. Indeed, when these sources of information are slightly in conflict the visual system appears to construct an entirely new object th...
متن کاملBio-inspired Binocular Disparity with Position-Shift Receptive Field
Depth perception starts with the binocular interaction receptive fields of simple cells modeled by two Gabor functions followed by a half-squaring function. Simple cells do not have reliable disparity computation. Complex cells combine two simple cells in quadrature. They are better adapted to encode disparity information. The image disparity can be determined by fixing the receptive field in o...
متن کاملColour helps to solve the binocular matching problem.
The spatial differences between the two retinal images, called binocular disparities, can be used to recover the three-dimensional (3D) aspects of a scene. The computation of disparity depends upon the correct identification of corresponding features in the two images. Understanding what image features are used by the brain to solve this binocular matching problem is an important issue in resea...
متن کاملStereopsis and aging
Three experiments investigated whether and to what extent increases in age affect the functionality of stereopsis. The observers' ages ranged from 18 to 83 years. The overall goal was to challenge the older stereoscopic visual system by utilizing high magnitudes of binocular disparity, ambiguous binocular disparity [cf., Julesz, B., & Chang, J. (1976). Interaction between pools of binocular dis...
متن کامل