一种流体艺术风格的自适应LIC绘制方法

把LIC算法应用到非真实感绘制中,提出一种自适应流体艺术图的LIC绘制方法.对源图像亮度分量计算切矢量场,然后对其进行增强、平滑处理获得结构矢量场;通过随机扰动源图像获得纹理参考图像;根据结构矢量场和纹理参考图像的局部特征产生可变的LIC积分步长和步数,自适应地处理纹理参考图像;最后对绘制效果进行颜色渲染,生成具有丰富颜色特征的流体艺术图.实验表明,该方法能够较好地模拟诸如梵高画的流体艺术风格,呈现生动、灵活的波动感.

An Adaptive LIC Rendering Method for Fluid Artistic Style

Fluid artistic style is an important part in art field,which expresses artists' inner feeling by exaggerated fluid lines.Many algorithms have been able to simulate pen-and-ink painting,oil painting,color painting and so on very well.But there is little research on fluid artistic style in non-photorealistic rendering(NPR).Applying LIC algorithm to non-photorealistic rendering,an adaptive LIC rendering method for fluid artistic style is presented.First,the carve vector field is calculated from the gradient field of source's luminance image.And the structured vector field needed by LIC rendering is computed by increasing and smoothing the carve vector field.Disturbing source image randomly produces texture image.Then the algorithm convoles texture image with the structured vector field adaptively.To form natural and smooth rendering results,variable LIC convolution step-length and step-number are produced according to the local characteristics of the structured vector field and the texture image separately.Finally,the algorithm transfers color characteristics of source reference image to the rendering result using color transferring algorithm,which makes the rendering result full of rich color like oil painting.Experimental results comfirm that this method can create vivid and flexible fluid artistic style such as van Gogh's style.