关键词: 剪纸, 几何特征, 形状上下文, 图像变形

Abstract: Portrait paper-cut is supposed to reproduce the vivid image details. Therefore, based on facial features and image morphing algorithm, a two-phase synthetic method of paper-cut is proposed. Firstly, it collects the face paper-cuts by professional artists, decomposes them into facial components, extracts their geometric features, and establishes a digital paper-cut database of facial features. It demonstrates a paper cutting synthesis toward the target facial images. The first stage is to demarcate the image feature points of the target face, divide the facial parts, and extract geometric features from each component. After that, it calculates the similar measurement between the target facial features and the corresponding components in the paper-cut database based on the geometric features and the shape context, a higher similarity of paper-cut parts can be selected by fusing the geometric features and the shape context features, so that after splicing, an initial personal portrait with a paper-cut style can be obtained. The second stage is to deform the face paper-cut generated in the first stage with the Thin Plate Spline（TPS） deformation algorithm to obtain the final personal portrait with a paper-cut style. It has been shown by multiple visual experiments that this method can be expected in terms of getting a satisfactory personal paper-cut portrait.

Key words: paper-cut, geometric feature, shape context, image deformation