In summary, the ROSE system has been designed to allow efficiency to be combined with fiexibility for support of interactive computergraphics applications. The object paradigm is exploited throughout all aspects of t...
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作者：
R. BaeckerDynamic Graphics Project
Computer Systems Research Institute and Department of Computer Science University of Toronto Toronto ONT Canada
To make computer programs for comprehensible, the presentation of program source text, program documentation, and program execution needs to be enhanced. A number of techniques and tools developed to achieve these end...
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ISBN:
(纸本)0897912586
To make computer programs for comprehensible, the presentation of program source text, program documentation, and program execution needs to be enhanced. A number of techniques and tools developed to achieve these ends are described. One of these is a design for the effective presentation of source text in the C programming language using high-quality digital typography; a processor which implements the design is also given. Some experimental evidence is summarized to demonstrate that the resulting source text presentation is significantly more readable and comprehensible than the presentation conventionally used today. Brief descriptions are given of two other techniques, the development of a system of structured program documentation incorporating both text and graphics and the portrayal of program execution with colored computer animation.< >
A method is developed for the measurement of short-range visual motion in image sequences, making use of the motion of image features such as edges and points. Each feature generates a Gaussian activation profile in a...
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A method is developed for the measurement of short-range visual motion in image sequences, making use of the motion of image features such as edges and points. Each feature generates a Gaussian activation profile in a spatiotemporal neighborhood of specified scale around the feature itself; this profile is then convected with motion of the feature. The authors show that image velocity estimates can be obtained from such dynamic activation profiles using a modification of familiar gradient techniques. The resulting estimators can be formulated in terms of simple ratios of spatiotemporal filters (i.e. receptive fields) convolved with image feature maps. A family of activation profiles of varying scale must be utilized to cover a range of possible image velocities. They suggest a characteristic speed normalization of the estimate obtained from each filter in order to decide which estimate is to be accepted. They formulate the velocity estimators for dynamic edges in 1-D and 2-D image sequences, as well as that for dynamic feature points in 2-D image sequences.< >
This paper describes and evaluates the design of four virtual controllers for use in rotating three-dimensional objects using the mouse. Three of four of these controllers are "new" in that they extend tradi...
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ROSE is an experimental database system for CAD/CAM applications that organizes a database into entries and relationships. The data model of ROSE is an extension of the relational model and the data manipulation langu...
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This paper focuses on the problem of management of CAD data by investigating the use of the software engineering principles of data abstraction and object-oriented programming as means for managing the volume and comp...
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In order to make computer programs more readable, understandable, appealing, memorable, and maintainable, the presentation of program source text needs to be enhanced over its conventional treatment. Towards this end,...
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The establishment of certain patterns of mystacial vibrissae in mice has been the aim of an extensive breeding program carried on in this laboratory since 1977. In a companion paper we have reported on variations in t...
The establishment of certain patterns of mystacial vibrissae in mice has been the aim of an extensive breeding program carried on in this laboratory since 1977. In a companion paper we have reported on variations in this pattern in an outbred population of ICR mice. Starting with 21 ICR animals we bred, mostly by brother-sister mating, for 13 bilaterally symmetric patterns of mystacial vibrissae characterized by the presence (or absence) of supernumerary whiskers (SWs). The strains are classified as follows: I, a mouse strain with the standard pattern; ii, eight strains bred for the occurrence of SWs at a given site or sites; and iiI, four mouse strains bred for a maximal number of SWs in different regions of the whiskerpad. Commonly, SWs occur in regions that coincide with the zones of mergence between the three facial processes except for two class ii strains in which we bred for SWs in the "straddler" row of vibrissae, and for one class iiI strain, in which we cultivated the tendency (that appeared late in our program) to have SWs at the crest of a facial process. For classes I and ii we analyzed the results for about 18 generations in terms of "improvement," meaning an increase in the percentages of animals with the desired phenotype together with a decreased frequency of undesired SWs. For class iiI, success in breeding meant the increase of the mean number of the desired SWs. All results led to the same conclusion: there is a genetic basis for the occurrence of SWs. The side preference of a particular SW is not strain dependent. It disappears in those class I and ii strains in which almost 100% of animals obtained the desired phenotype. The increase in number of SWs in one zone of mergence does not depend on the presence of SWs in the other. Where tested, we almost always found a representation of an SW in a topologically equivalent location within the "barrelfield" area of the somatosensory cerebral cortex. Except for some diseases early in the breeding progr
An error in the proof, and in the statement of a generalization, of the result that submodular setfunctions can be minimized over the subsets with odd cardinality is corrected.
An error in the proof, and in the statement of a generalization, of the result that submodular setfunctions can be minimized over the subsets with odd cardinality is corrected.
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