Sketch drawing method with hierarchical sketch texture

Abstract

The existing technique of computer Non-Photorealistic Rendering(NPR) on sketch drawing always has some differences from hand-drawing.In order to solve the problem,a method was designed which can generate sketch levels,and integrate with multi-pixel-wide lines to generate sketches which has sketch texture with sense of hierarchy.First,pretreat the original image by denoising and enhancement,adopt differentiation to extract multi-pixel-wide contour lines,use dilation and erosion and subtract the result to generate multi-layer bilateral of contour lines,then take the processing of motion-blur to multi-layer bilateral of contour lines to generate sketch texture,and finally,integrate edge and sketch texture,thus completing images sketching.Through lots of experiments on images of different features,it is proved that the results of the method are more close to hand-drawing style.