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The studies reported in Annual Technical Report 1 were designed to probe various aspects of spatial pattern discrimination. Several important findings have emerged allowing limits of pattern discrimination to be related to structural properties of the photoreceptor lattice. First, our findings have suggested that spatial frequency discrimination exceeds resolution of the photoreceptor mosaic for spatial frequencies above approximately 4 c/deg, thus spatial frequency discrimination qualifies as a hyperacuity task. Further, spatial frequency discrimination was not a smooth function of spatial frequency, but rather showed a regularly segmented structure that appeared to be related to foveal photoreceptor center-to-center spacing. This result suggests that the photoreceptor lattice could be the primary geometrical instrument for estimating distance or separations between stimulus features. We have developed a technique to study the structural quality of a retinal mosaic by digitizing the foveal photoreceptor lattice of a primate (Macacca fascicularis). Our analyses of the foveal region has revealed a very high quality hexagonal lattice with a correlation length of at least 130 photoreceptors. These results confirm that the photoreceptor lattice is constructed with sufficient structural quality to provide a source of geometrical information reflected in spatial discrimination tasks.
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
It is our great pleasure and honor to organize the First IEEE Computer Society International Workshop on Biologically Motivated Computer Vision (BMCV 2000). The workshop BMCV 2000 aims to facilitate debates on biologically motivated vision systems and to provide an opportunity for researchers in the area of vision to see and share the latest developments in state-of-the-art technology. The rapid progress being made in the field of computer vision has had a tremendous impact on the modeling and implementation of biologically motivated computer vision. A multitude of new advances and findings in the domain of computer vision will be presented at this workshop. By December 1999 a total of 90 full papers had been submitted from 28 countries. To ensure the high quality of workshop and proceedings, the program committee selected and accepted 56 of them after a thorough review process. Of these papers 25 will be presented in 5 oral sessions and 31 in a poster session. The papers span a variety of topics in computer vision from computational theories to their implementation. In addition to these excellent presentations, there will be eight invited lectures by distinguished scientists on “hot” topics. We must add that the program committee and the reviewers did an excellent job within a tight schedule.
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.