Pencil drawing generation method and device combining skeleton stroke and texture features

Abstract

The present invention provides a generation method and generation device of a pencil drawing fusing skeleton strokes and textural features. The generation device of a pencil drawing comprises an original image acquisition unit, a gray image generation unit, a gradient image generation unit, a skeleton stroke layer generation unit, a tone layer generation unit, a texture feature rendering layer generation unit and a pencil drawing image generation unit. The generation method provided by the invention comprises: a gradient image is obtained through graying, deburring processing and edge detection of and inputted image; the gradient image is processed to be a skeleton stroke layer; the skeleton stroke layer is processed to be a tone layer; a texture feature rendering layer is obtained through texture synthesis and establishment of a tone mapping mathematical model; and multiply mixing of the skeleton stroke layer and the texture feature rendering layer is performed to obtain a final pencil drawing with a pencil hand-painting drawing effect. According to the invention, the step of generation of a pencil drawing is simple, the efficiency is high and the hand-painting effect is outstanding.

Description

technical field [0001] The invention relates to the field of computer-aided design, in particular to a method and device for generating pencil drawings that fuse skeleton strokes and texture features. Background technique [0002] With the development of mobile Internet and the popularity of smart phones, image processing technology has been more and more widely used. At present, more and more people quickly browse pictures on the Internet and make artistic pictures for sharing. Therefore, there is a huge application demand for the artistic processing market of pictures. In mass media platforms such as TV or the Internet, art creators often use Non-realistic images are used to increase visual drama and entertainment, while in abstract visual art, pencil drawing is the basis of non-realistic image drawing and can effectively increase visual artistry. However, manual hand-painting requires the creator to have certain art and design skills, and the creation process is time-con...

AI Technical Summary

Problems solved by technology

Representative methods include Yamamoto et al. (S.Yamamoto, X.Y.Mo, A.Imamiya, "Enhanced LIC pencil filter", inProc.IEEE International Conference on Computer Graphics, Imaging and Visualization, 2004, pp:251-256.) The stroke structure is extracted from the image, and the line integral convolution method is used to obtain the image texture for pencil sketching. However, this method produces a pencil hand-painted effect that lacks realism; Lu et al. (C.W.Lu, L.Xu, J.Jia, "Combining sketch and tone for pencil drawing production", inProc.the Symposium on Non-Photorealistic Animation and Rendering, 2012, pp:65-73.) A method based on the superposition of stroke structure and texture is proposed to automatically generate pencil drawing images

However, although the pencil image obtained by this method has a certain hand-painted artistic effect visually, the calculation of this method is complex, and it is very time-consuming to process a pair of images

[0004] In addition, the existing pencil drawing conversion software and its implementation method on the market are not very effective in sketching. Therefore, the research method for the computer to quickly and automatically generate pencil hand-drawn images still needs to be improved.

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