针对传统色彩传递过程中容易出现色彩误传的现象,研究一种基于融合和色彩扩展的灰度图像彩色化技术,首先利用图像融合技术对微光图像和红外图像进行融合,将融合后的图像作为目标图像,然后利用改进的welsh色彩传递算法对目标图像进行上色得到精确匹配的局部彩色化图像,最后利用最小二乘优化方法对得到的局部彩色化图像进行优化.实验结果表明该算法修正了传统算法中色彩误传现象,验证了算法的正确性.%Aiming at the phenomenon of color misrepresentation appearing easily in the traditional color transfer process, the paper research a gray image colorization method based on image fusion and color transfer. Firstly, the low-light image and infrared image was fused by using image fusion technology, and the syncretic image is used as target image. And then the improved welsh algorithm was used to transfer color to target image, and gained a local color image that was exact matched. Finally, the local color image was optimized make use of least squares optimization method. The experimental results show that the algorithm modified the traditional algorithm of color misinformation phenomenon and the results demonstrate the practicality of this method.
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