Research On The Design Of Paper-cut Based On Paper-cut Images

Paper-cut is a long history of traditional folk arts in china, the subjective image is strong, unique, in advertising, film, games and other industries has been widely used. With the continuous development of the animation industry, paper-cut provides a good material for the animation industry, its visual effects and practical application widely welcomed by the people. The current animation design to three-dimensional development, therefore, the existing paper-cut images automatically generate three-dimensional paper-cut graphics, has important significance, Its provided material for the three-dimensional animation design of future materials.This paper analyzes the status of the computer paper cutting research, paper-cut images on the automatic generation of three-dimensional graphics technology to study, the edge of the image by acquiring, construct three-dimensional data, paper-cut images to three-dimensional graphics to achieve the conversion of paper-cut graphics and design. Specific work mainly from the following aspects:(1) Paper-cut image preprocessingPaper-cut images of the binary, edge detection, contour tracking, corner detection and other processing. Binarization of the image, the image histogram by cutting the global threshold processing, image segmentation by threshold, the gray level of the threshold image binarization; edge detection, detection of vertical and horizontal pixel gray value field neighbors to determine whether there is background pixel, edge points if there was, save the coordinates, otherwise the current pixel gray value is set to the background gray value; contour tracing using the 8-chain code, combined with 8-direction chain code offset, Shun clockwise or counter-clockwise track is accessed to determine the next pixel until you find the image to the next edge point, so repeat until the end to find the starting point; corner detection, tracking has been on the edge of the current pixel and its predecessor, successor pixels to judge whether the same line, if it is, the current point is not to abandon the corner, otherwise, the current point to corner reservations.(2) Cutting graphics redrawn and design in the spaceAccording to the extracted coordinates of the edge corner, redrawn in the space by cutting corners to get the graphic counterclockwise within the area preserved, is the graphics area, press cutting corners clockwise direction within the region graph by graph removed, is the hollow area. Paper-cut for space illumination model graphics processing, highlighting the three-dimensional graphics. Real-time graphics changes in space x, y, z-axis coordinate value or the rotation angle, graphical real-time control of space to achieve roaming space graphics and multi-angles. Based evaluator, with the control points set, adjust the position of control points on the surface to meet the needs of the deformation. Using a single paper-cut patterns, defined in the OpenGL multiple surfaces, multiple surfaces repainted, and given different in different surface deformation, translation, rotation, scaling value.(3) Paper-cut images transformation system designLine with OpenGL rendering technology of three-dimensional, design paper-cut images to the paper-cut graph transformation system, in the system parameters set by the rotation of spatial graph paper cutting, moving, scaling transformation, can acquire the new paper-cut works.The art of paper-cut works scanned to acquire images, using the method of paper,paper-cut image processing to produce a paper-cut style dimensional graphics, to reflect the three-dimensional graphics, and achieved good results.