Abstract: Aiming at the problem of color contour generation in color 3D printing, this paper proposes a color contour generation algorithm based on the texture mapping model. According to the plane projection method, the mapping relationship between the texture and the 3D model is established, and then the model is sliced to obtain the geometric information and texture information of the contour vertex. According to the mapping relationship between the contour vertex and the texture image, the color information between the vertex is interpolated. At the same time, it gives a fast recognition algorithm for inner and outer contours, and a color contour biasing method based on the offset algorithm is proposed to form the color thickness and eliminate the staircase effect.

Key words: texture map, color slice, color cross-section contour, color depth, color extraction