Abstract: Abstract: Non-realistic rendering (NPR) also known as artistic rendering, is mainly used to simulate artistic rendering style. With the continuous development of image processing technology, researchers have simulated the unique Chinese ink painting, pyrography, Yunnan heavy color painting and other art works in China. At present, digital simulation of the Miao embroidery is still in need. The Miao embroidery has already been approved by the state council to be included in the first batch of China’s national intangible cultural heritage list. Taking the Miao embroidery as the research object, this paper puts forward a painting method of the Miao embroidery artistic style with multi-angle stitches according to the characteristics of real the Miao embroidery artistic works. Firstly, aiming at the characteristics of exaggerated and clear composition of the Miao embroidery pattern, the gray level of the target image is processed, and multiple embroidery images are segmented by multi-threshold image processing method. Then, the morphological method is used to eliminate the spurious points, fill the void points and smooth the edges of the pattern. After that, a stitch generation algorithm based on spatial transformation of image matrix and adding longitudinal texture is used to generate stitch texture of the Miao embroidery at different angles for each embroidery image. By using the method of linear combination, the texture images of the Miao embroidery stitches are synthesized into texture images. Finally, the texture map and the target image of the Miao embroidery are superimposed by Alpha transparency hybrid algorithm to obtain the artistic features of strong color contrast of the Miao embroidery pattern and produce the effect image. Experiments show that this method can simulate the multi-angle stitch texture effect of the real Miao embroidery works.

Key words: Keywords: NPR, Miao embroidery, mathematical morphology, image matrix space transform, image addition