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There are two challenges in three-dimensional (3D) profilometry, such as real-time and accuracy. Color-encoding fringe projection profilometry (CEFPP) can solve these challenges to some extent. It encodes in the red, green, and blue color channels, and CEFP can use three completely different fringe patterns. In this paper, a novel CEFP that only uses one color fringe image acquired by experiential 3CCD cameras is presented. First, the wavelet transform coefficients phase at the ridge position under the Morlet wavelet is theoretically clarified. A simple and quick method that acquires the scaling coefficient is introduced. The wrapped phases in the three color channels of the color fringe image are obtained by wavelet bridge position. The phase original of color fringe pattern is defined as one white color. Using an evolution function defined in this paper, the phase-crossing is located. An absolute phase is acquired by a three coding pitch method in a two coding direction. In order to verify the presented method, some profilometry experiments are carried out in the constructed 3D profilometry system using one projector and one 3CCD camera. The experimental results showed that a maximum standard deviation of measurement error is 1.42mm, and the reconstruction surface of a gypsum head portrait can be determined.

A Novel Color Encoding Fringe Projection Profilometry based on Wavelet Ridge Technology and Phase-Crossing