Science Journal of Circuits, Systems and Signal Processing
Volume 3, Issue 6-1, December 2014, Pages: 30-38
Received: Sep. 20, 2014;
Accepted: Jan. 28, 2015;
Published: Feb. 27, 2015
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Xiaohua Zhang, Department of Information System and Management, Hiroshima Institute of Technology, Hiroshima, Japan
Ning Xie, School of Software Engineering, Tongji University, Shanghai, China
Yuelan Xin, Department of Physics, Qinghai Normal University, Xining, China
Heming Huang, School of Computer Science, Qinghai Normal University, Xining, China
A new non-photorealistic rendering algorithm is proposed for creating artistic painting with soft stream flow from natural color images. The algorithm consists mainly of two stages, that is, a revised bilateral filter called trilateral filter is firstly applied to original color image for creating drawings using gradient information and then a DoG-like band-pass filter is adapted for generating soft stream flow along the eigenvectors and therefore the image is smoothed along curved stream lines. The proposed trilateral filter is an extension of bilateral filter by incorporating gradient space. On the other hand, DoG-like band-pass filter is designed by applying eigenvectors and eigenvalues of a structure tensor matrix calculated at each pixel. Our approach effectively preserves image main structures while smoothing image regions in an anisotropic way. Even in regions with lower contrast, stream flow-like potential structures are also well produced due to a gradient relaxation. The experiments demonstrate that the proposed algorithm works well and produces good and pleasant visual results.
Stream Flow Painting from Real Images Using Anisotropic Band-Pass Filter, Science Journal of Circuits, Systems and Signal Processing. Special Issue: Computational Intelligence in Digital Image Processing.
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