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Boca Raton: Chapman-Hall/ Taylor and Francis Group, 2011.
Similar publications
Minkov V., Sawada T. Psychology. PSY. Высшая школа экономики, 2018. No. WP BRP 91/PSY/2018.
This is a theoretical study.
Theoretical understanding of a visual stimulus in a psychophysical experiment is critical for controlling the experiment and for interpreting its results. This fact encourages vision scientists to use “simple” visual stimuli. A triangle in a 3D scene is one of the simplest stimuli for studying 3D perception. In this study, we analyzed geometrical properties of a relation between the triangle and its retinal image using a computer algorithm. Based on the analysis, we discuss validity of results of past studies that used triangles as their visual stimuli.
Added: Sep 3, 2018
Li Y., Sawada T., Shi Y. et al. In bk.: Shape perception in Human & Computer Vision. NY: Springer, 2013. P. 21-40.
Added: Sep 24, 2014
Koshmanova E., Sawada T. Psychology. PSY. Высшая школа экономики, 2018. No. WP BRP 90/PSY/2018.
This is an empirical study.
The perception of a pair of contours in a retinal image cannot be understood simply by adding up the perceptions of the individual contours, especially when they form a perpendicular junction, or are parallel to one another. It is the relationship among the contours that determines what is perceived. Note that it is hard to actually compare the perception of such configurations quantitatively. We managed to do this by testing the perception of such configurations in three psychophysical experiments in which the perception was characterized by measuring the orientation threshold of a single contour. This threshold was estimated by using a modified Method of Constant Stimuli based on the assumption that contours forming a configuration are perceived individually, and that they are integrated linearly. This assumption made the quantitative comparison of the perceived configurations possible. We found that changes of the estimated threshold depended on the type of the configuration, specifically thresholds estimated from a perpendicular junction were substantially lower than thresholds estimated from a single contour or from a non-perpendicular junction. The lowest thresholds were observed when the threshold was estimated from a pair of parallel contours. These results suggest that the visual system is sensitive to perpendicular junctions and parallel contours in a retinal image.
Added: Sep 3, 2018
Veselov E. A., Uvaysov S. U., Lvov B. G. et al. In bk.: Innovative Information Technologies: Materials of the International scientific–practical conference. Part 2. Prt. 2. M.: HSE, 2014. Ch. 2. P. 710-716.
This article presents a research of direct and reverse projection procedures. Presents Mathematical calculations of spatial situated point projection are presented as particular case for obtaining the expressions which describe this process. The application of these processes in problems of three-dimensional object reconstruction from images is demonstrated by a simple 3D object.
Added: Jun 23, 2014