Abstract

A new method is proposed for fabric 3-D surface reconstruction by using a photometric-stereo technique. The idea of photometric stereo is to vary the direction of incident illumination between successive images while the viewing direction is kept constant. It is shown that this provides sufficient information to reconstruct a fabric-surface profile. In the proposed algorithm, the relative depth and its derivatives are obtained by using a finite-difference method. Synthetic images are first used to simulate the proposed photometric-stereo method, and then the actual fabric is used to test this method. The fabric-surface shape can be obtained from the 3-D contour data of the fabric. From the fabric-surface profile, we can extract a wrinkle-feature parameter. This is the base for analyzing and evaluating the degree of fabric wrinkle objectively.

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