关键词: 快速高光去除, 双边滤波, 最大漫反射色度, 双色反射模型, 线性插值, 图像处理

Abstract: In inhomogeneous objects, highlights are linear combinations of diffuse and specular reflection components, and highlight removal from a single input image is treated as a non-trivial task in computer vision. A number of methods have been proposed to separate or decompose diffuse and specular reflection components. However, all methods require explicit color segmentation process, causing low robustness and high computational complexity. In this paper, an effective specula highlight removal method using the bilateral filter is proposed. The method utilizes a key property-the maximum diffuse chromaticity in local patches in colorful images generally changes smoothly. Using such observation, then the maximum diffuse chromaticity values of the specular pixels are computed by directly applying bilateral filter to the maximum fraction of the color components of the original image, such that specular highlight can be removed ultimately. The fast bilateral filtering techniques is utilized to enable the method to run much faster than the state-of-the-art. Compared to traditional methods, the method can get much better results and faster speed, which is very well suited for real-time applications.

Key words: fast highlight removal, bilateral filter, maximum diffuse chromaticity；dichromatic reflection model, linear interpolation, image processing