WorldCat Identities

Richards, Whitman

Overview
Works: 59 works in 149 publications in 2 languages and 2,556 library holdings
Genres: Conference proceedings 
Roles: Author, Editor, Compiler, Author of introduction
Classifications: QP441, 612.808
Publication Timeline
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Most widely held works by Whitman Richards
Perception: mechanisms and models; readings from Scientific American by Richard Held( Book )

15 editions published between 1970 and 1972 in English and held by 784 WorldCat member libraries worldwide

Recent progress in perception : readings from Scientific American( Book )

10 editions published between 1964 and 1976 in English and held by 553 WorldCat member libraries worldwide

Natural computation by Whitman Richards( Book )

10 editions published in 1988 in English and Undetermined and held by 362 WorldCat member libraries worldwide

Perception as Bayesian inference( Book )

10 editions published between 1996 and 2008 in English and held by 274 WorldCat member libraries worldwide

This book provides an introduction to and critical analysis of the Bayesian paradigm. Chapters by leading researchers in computational theory and experimental visual science introduce new theoretical frameworks for building perceptual theories, discuss the implications of the Bayesian paradigm for psychophysical studies of human perception, and describe specific applications of the approach. The editors have created a critical dialogue of ideas through the authors' commentaries on each others' chapters, conveying to the reader a unique appreciation for the issues and ideas raised in the book
Vision research for flight simulation by Whitman Richards( Book )

7 editions published between 1982 and 1983 in English and held by 64 WorldCat member libraries worldwide

This report is based on a workshop organized by the Committee on Vision of the National Research Council and by the Operations Training Division of the Air Force Human Resources Laboratory at Williams AFB in June 1980. The workshop brought together vision scientists from academia and government scientists concerned with research on visual displays for flight simulation. The principal objective was to provide recommendations concerning fruitful approaches for the conduct of research on what visual information is needed for simulation and how it might best be presented. Low-level flight was used as a focus for discussion of problem-solving approaches. The technical report prepared by the steering group provides examples of particular research strategies that might help elucidate several of the long-range issues in visual simulation
Anigrafs : experiments in cooperative cognitive architecture by Whitman Richards( Book )

4 editions published in 2015 in English and held by 60 WorldCat member libraries worldwide

Image understanding : 1985-86 by W Richards( Book )

6 editions published between 1986 and 1987 in English and held by 52 WorldCat member libraries worldwide

Image understanding : 1989 by S Ullman( Book )

2 editions published in 1990 in English and held by 29 WorldCat member libraries worldwide

Study guide to accompany Perception : mechanisms and models : readings from Scientific American by John P. J Pinel( Book )

1 edition published in 1973 in English and held by 20 WorldCat member libraries worldwide

Image understanding 1984( Book )

4 editions published between 1984 and 1985 in English and held by 6 WorldCat member libraries worldwide

Image understanding 1985-1986( Book )

1 edition published in 1987 in English and held by 6 WorldCat member libraries worldwide

Equation counting and the interpretation of sensory data by Whitman Richards( Book )

2 editions published in 1981 in English and held by 4 WorldCat member libraries worldwide

Many problems in biological information processing require the solution to a complex system of equations in many unknown variables. An equation-counting procedure is described for determining whether such a system of equations will indeed have a unique solution, and under what conditions the solution should be interpreted as 'correct'. Three examples of the procedure are given for illustration, one for auditory signal processing and two from vision. (Author)
Color vision and image intensities : when are changes material? by John M Rubin( Book )

2 editions published in 1981 in English and held by 4 WorldCat member libraries worldwide

Marr has emphasized the difficulty in understanding a biological system or its components without some idea of its goals. In this paper, a preliminary goal for color vision is proposed and analyzed. That goal is to determine where changes of material occur in a scene (using only spectral information). This goal is challenging for two reasons. First, the effects of many processes (shadowing, shading from surface orientation changes, highlights, variations in pigment density) are confounded with the effects of material changes in the available image intensities. Second, material changes are essentially arbitrary. We are consequently led to a strategy of rejecting the presence of such confounding processes. We show there is a unique condition, the spectral crosspoint, that allows rejection of the hypothesis that measured image intensities arise from one of the confounding processes. (If plots are made of image intensity versus wavelength from two image regions, and the plots intersect, we say that there is a spectral crosspoint.) We restrict our attention to image intensities measured from regions on opposite sides of an edge because material changes almost always cause edges. Also, by restricting our attention to luminance discontinuities, we can avoid peculiar conspiracies of confounding processes that might mimic a material change. Our crosspoint conjecture is that biological visual systems interpret spectral crosspoints across edges as material changes. A circularly symmetric operator is designed to detect crosspoints; it turns out to resemble the double-opponent cell which is commonplace in biological color vision systems. (Author)
Shikaku no seibutsu keisan riron( Book )

2 editions published in 1994 in Japanese and held by 3 WorldCat member libraries worldwide

FACTORS AFFECTING DEPTH PERCEPTION( Book )

2 editions published between 1970 and 1971 in English and held by 3 WorldCat member libraries worldwide

The report describes ongoing work on certain factors that affect depth perception. Of particular interest is that a sizeable portion (30%) of the population are unable to make full use of the binocular parallax cue for judging the distance of objects. These individuals are said to be stereoanomalous. Work over the past year has shown that these individuals localize objects in space in a manner different from other individuals who possess the full stereoscopic capability. A considerable effort has been spent in developing a simple, portable test for diagnosing the presence of stereoanomalies. Tests based upon random dot patterns appear to be satisfactory. One important distinction that emerges concerns two separate systems for stereopsis in the normal observer: one sensitive to positional changes in depth, and a second parallel system that requires object motion
Codon constraints on closed 2d shapes by Whitman Richards( Book )

4 editions published in 1984 in English and held by 3 WorldCat member libraries worldwide

Codons are simple primitives for describing plane curves. They thus are primarily image-based descriptors. Yet they have the power to capture important information about the 3D world, such as making part boundaries explicit. The codon description is highly redundant (useful for error-correction). This redundancy can be viewed as a constraint on the number of possible codon strings. For smooth closed strings that represent the bounding contour (silhouette) of many smooth 3D objects, the constraints are so strong that sequences containing 6 elements yield only 33 generic shapes as compared with a possible number of 15,625 combinations. An important task for object recognition is the description of the shape of a bounding contour such as a sihouette that outlines as object. Although recognition need require only partial segments of such contours, the internal canoncial description, against which the image contour is compared, is very likely a closed ring. Our concept of most objects should lead us to expect such a closed contour. The description of closed, 2D contours thus is an important ingredient of a system for object recognition. First the author present such a scheme, described in more detail elsewhere and then show how the scheme leads to a hierarchical taxonomy of closed, 2D shapes. Additional keywords: Image understanding; Shape representation; Applied mathematics; Artificial intelligence
From Waltz to Winston : (via the connection table) by Whitman Richards( Book )

4 editions published in 1987 in English and Undetermined and held by 3 WorldCat member libraries worldwide

A lightness scale from image intensity distributions by Whitman Richards( Book )

2 editions published in 1981 in English and held by 3 WorldCat member libraries worldwide

A lightness scale is derived from a theoretical estimate of the probability distribution of image intensities for natural scenes. The derived image intensity distribution considers three factors: reflectance, surface orientation and illumination, and surface texture (or roughness). The convolution of the effects of these three factors yields the theoretical probability distribution of image intensities. A useful lightness scale should be the integral of this probability density function, for then equal intervals along the scale are equally probable and carry equal information. The result is a scale similar to that used in photography, or by the nervous system as its transfer function. (Author)
Vision Algorithms and Psychophysics( Book )

3 editions published between 1984 and 1989 in English and held by 2 WorldCat member libraries worldwide

Vision by man or machine is the useful symbolic descriptions form images of the world. Studies of human visual system provide valuable insights into the kinds of descriptions that will be the most useful, but little insight into the computational problems involved in deriving and manipulating theses descriptions. This research examines several computational problems associated with aspects of two- and three-dimensional vision. The solution to these problems includes the design and implementation of particular algorithms. Their efficiency and flexibility is compared with that of the human visual processor. Keywords include: Image understanding, Visual pattern recognition, Visual algorithms, Human vision, Biological information processing
Top-Down Influences on Bottom-Up Processing( )

4 editions published between 1991 and 1993 in English and held by 0 WorldCat member libraries worldwide

Although perception is the subject of extensive study, there has been no formal definition of this state. We offer one, and show how even a rather simple formal conceptualization of a percept entails a considerable amount of machinery. Over the past year or two, several components of the machinery required have been studied. These include (1) the role of especially powerful features, called 'Key Features', and (2) how perceptual categories incorporate world knowledge. There also has been progress in understanding preferences for certain structures, as well as in the dynamics of altering preferences (Chaos in Percepts) ... Vision, Al, Cognition, Neurophysiology, Visual psychophysics, Dynamical systems
 
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Natural computation
Alternative Names
Richards, Whitman

リチャーズ, ホイットマン

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Perception as Bayesian inference