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《Opto-electronic Engineering》 2005-08
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Multi-focus image fusion scheme with wavelet transform

CHU Heng,LI Jie,ZHU Wei-le(School of Electronic Engineering,UEST of China,Chengdu 610054,China)  
A multi-resolution image fusion method using local gradient of low frequency coefficients is proposed. According to local gradient information, wavelet low frequency coefficient obtained from source image is selected to compose respective low frequency coefficient of the fused image. The fused image by the proposed method is evaluated with some parameters such as average error, peak signal noise rate, root mean square error, difference index and entropy, in comparison with three other conventional methods. Experimental results show that most evaluation specifications acquired with this method are better than those with three other methods. The optimal wavelet decomposition level with this method consists of two levels, while that of the others consists of five levels. The less the optimal wavelet decomposition level is, the less the computational operation of image fusion will be. This method reduces the computational load and improves the quality of image fusion.
【CateGory Index】: TN911.73
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