Abstract: A new multi-focus color image fusion method based on wavelet transform is proposed in this paper.First，the R，G，B components of each input color image are decomposed by wavelet transform and the multi resolution sub-images of each input image can be obtained.Second，different fusion methods are applied to obtain the wavelet coefficient on the corresponding levels of the multi resolution sub-images.Finally，the output image can be obtained through inverse wavelet transform.The experiment results show that the fusion image can obtain lower color distortion and higher peak signal to noise ratio.

Key words: image fusion, wavelet-transform, multi-focus, color image

摘要： 给出了一种基于小波变换的多聚焦彩色图像融合方法。首先对待融合图像的R、G、B三分量进行小波变换，将其分成不同频率的子图像。然后对于低频和高频子图像采用不同的算法进行融合，得到融合图像的小波系数。最后利用小波逆变换重构融合图像。实验结果表明，融合图像具有较小的颜色失真和较高的峰值信噪比。

关键词: 图像融合, 小波变换, 多聚焦, 彩色图像