CAJ | 학술논문

该文针对抠图中前背景颜色歧义这一难题，提出快速随机纹理算法来对颜色信息进行有效的补偿，先对原始图像进行稠密抽取得到初始纹理，后经随机投影降维，再根据前背景交叠度选择最优通道生成随机纹理图。结合生成的纹理信息，设计了空间、颜色、纹理联合样本选择指标。接着，综合考虑局部近邻和非局部近邻的作用，对样本选择代价进行滤波。最后论证近邻迭代滤波与全局能量方程平滑的关系，推导了后期迭代平滑公式。实验结果表明，基于随机纹理的代价滤波式抠图在前背景颜色分布近似时，能够取得视觉和定量上更好的结果。
해문침대구도중전배경안색기의저일난제，제출쾌속수궤문리산법래대안색신식진행유효적보상，선대원시도상진행주밀추취득도초시문리，후경수궤투영강유，재근거전배경교첩도선택최우통도생성수궤문리도。결합생성적문리신식，설계료공간、안색、문리연합양본선택지표。접착，종합고필국부근린화비국부근린적작용，대양본선택대개진행려파。최후론증근린질대려파여전국능량방정평활적관계，추도료후기질대평활공식。실험결과표명，기우수궤문리적대개려파식구도재전배경안색분포근사시，능구취득시각화정량상경호적결과。
In order to deal with the color overlap problem in matting, a fast random projection method is proposed to complement the color information. First, the raw texture matrix is obtained through dense abstraction from color image. The random projection is performed and the best three texture channels are chosen by the foreground and background overlap factors. Combining the texture image, the new cost function takes into account texture, color, and spatial information. Second, the filtering process is carried out to the sample selection cost, including the effect of the local and nonlocal neighbors. Finally, the relationship between iterative filter and global energy smooth is proven, and the post filter formula is obtained. Experiments show that the cost filtered matting with random texture features produces both visually and quantitatively better results when the color distributions of the foreground and background are similar.