中文摘要：

提出了一种新的灰度-彩色处理算法．首先利用Sobel算子对图像进行边缘检测，突出感兴趣区域；然后根据边缘检测的结果做伪彩色处理．实验结果表明：利用此算法对肺癌图像进行伪彩色处理，增强了图像的可视性，突出病灶区，提高了医生的诊断率．

英文摘要：

In this paper, a new Grey-to-color processing algorithm is proposed. Firstly, the images are preprocessed by Sobel method before Pseudo-color processing so that the areas of interest can be highlighted. Secondly, Pseudo-color processing is implemented according to the preprocessing results. The result of the experiment indicates that the improved pseudo-coloring method can effectively enhance lung cancer image visualization, highlight disease area and improve doctors＇ accuracy in diagnoses.