1. Figure Legend: From: Key characteristics of specular stereo
Journal of Vision. 2014;14(14):14. doi: /
Figure Legend:
Illustration of corresponding points mapped onto an object's surface. We show corresponding points (PL, PR) identified by matching reflected ray vectors. A regular grid of points in the left eye image (orange) are matched to points in the right eye image (green). We connect these points to provide a vector flow representation where the color of the connecting line (red or blue) indicates the sign of the disparity. This vector map is plotted on top of a color map that shows the intrinsic Gaussian curvature of the underlying surface. To aid visualization and avoid overcrowding the figure, we down-sampled the matches and displayed only matches with cyclopean separation less than 12 arcmin. The shapes are examples of potato objects (∼7 cm in diameter), viewed from 50 cm with an interocular spacing of 6.5 cm. These were mathematically defined in spherical coordinates, and sample locations are therefore uniform in spherical coordinates (i.e., not regular in the image plane). Sampling in this way allowed us to estimate precise surface normals analytically. This precision was critical because even very small errors in surface normal calculations (which would be unavoidable if we had sampled in the image plane and used numerical methods for surface normal estimation) may lead to large errors in reflected vectors. Our calculations of ground truth matches sampled the visible hemispheres of the shapes (180° × 180°) very densely (512 × 512 samples). The results shown here are down-sampled considerably for visualization.
Date of download: 11/4/2017
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