中文摘要：

针对SAR灰度影像信息不丰富，不利于解译识别的问题，提出了一种基于Roberts梯度与HIS色彩空间的SAR图像伪彩色编码算法。首先，计算SAR图像的梯度图像，并确定梯度阈值r；然后，比较像素梯度与阈值的大小，大于阈值的像素按照Roberts梯度方法编码，否则按照基于HIS色彩空间方法编码；最后，对两种编码结果进行合成，得到最终伪彩色SAR图像。利用TerraSAR—X影像数据进行了实验验证，结果表明：本文研究的方法均能达到很好的伪彩色编码效果。

英文摘要：

Aiming at the problems of that SAR gray image interpretation and identification are inconvenient because of its poor infor-mation, a pseudo - color coding of SAR Images approach is proposed based on Roberts gradient and HIS color space. Firstly, calcu-late the gradient of SAR image and determine the threshold T; Secondly, compared to the threshold, if the pixel gradient is bigger thanit, it is coded with the method on the basis of Roberts gradient, otherwise, the method on the basis of HIS color space is applied;Lastly, the final pseudo - color SAR image is got by synthesizing the results of two coding. The experiments are done by using of Ter-raSAR - X image data, and the results show that the method of this paper was able to achieve a great pseudo - color coding.