抄録
In the study by Yasuda et al., a basic scheme of subjective contour extraction was proposed. It succeeded in extracting subjective contours from relatively simple figures. However, the scheme when applied to the figure of a subjective zebra against a complex striped background resulted in generation of extraneous contours and in addition failed to generate certain subjective contours. Therefore the basic scheme has been augmented by three new rules (two rules to delete extraneous subjective contours and a rule of multiple stages extraction). With the augmented scheme, the subjective contours of the zebra were extracted with reasonable results.
