基于快速非抽样小波变换的岩屑多聚焦图像融合-计算机工程与应用.PDFVIP

Computer Engineering and Applications 计算机工程与应用 2013 ，49 （11） 195 基于快速非抽样小波变换的岩屑多聚焦图像融合 张 影，王正勇，王 林，何小海 ZHANG Ying, WANG Zhengyong, WANG Lin, HE Xiaohai 四川大学 电子信息学院，成都 610064 College of Electronics and Information, Sichuan University, Chengdu 610064, China ZHANG Ying, WANG Zhengyong, WANG Lin, et al. Multi-focus debris image fusion based on fast non-sampling wavelet transform. Computer Engineering and Applications, 2013, 49 （11）：195-198. Abstract ：For the computational complexity of traditional non-sampling wavelet algorithm, a method of multi-focus image fusion based on fast non-sampling wavelet with the advantage of the characteristic of the processing on both space and frequency domain is proposed in this paper. Inverse transform is not needed as compared to previous non-sampling wavelet algorithms. Pixel value of fusion image is directly taken at the corresponding position of the source image based on the maximum principle of the sum of the absolute value of high frequency wavelet coefficients. Hence, there is a great improvement both on the real-time requirement of image processing and the fusion effect. Two comparisons, namely, comparison between the algorithm and six tra- ditional non-sampling wavelet algorithms, comparison between fast non-sampling wavelet transform and traditional sampling wavelet transform are made in the work. The comparison results validate the advantage of the algorithm on effect and the time cost. Key words ：fast non-sampling; wavelet transform; fusion algorithm; space domain 摘 要：针对传统非抽样小波变换算法较复杂的缺点，结合空、频域处理上的特点，提出了一种基于快速非抽样小波变换 的多聚焦图像融合算法。与之前基于非抽样小波变换的融合算法不同，该算法取消了反变换，它根据高频小波系数绝对 值和取大原则，融合图像像素值直接在对应源图像的相应位置取值，从而大大提高了图像处理的实时性，改善了融合效 果。通过与六种非抽样小波变换融合算法的比较，以及快速非抽样小波变换与非抽样小波变换的融合时间对比，直观地 给出了该算法的效果和时间优势。 关键词：快速非抽样；小波变换；融合算法；空域 文献标志码：A 中图分类号：TP391.41 doi ：10.3778/j.issn. 1002-8331.1201-0221 1 引言 像中的重要特征