Question

任何人都请解释以下代码正在做什么。该代码使用固定小波变换执行图像融合。

 %image decomposition using discrete stationary wavelet transform  
 [A1L1,H1L1,V1L1,D1L1] = swt2(im1,1,'sym2');
 [A2L1,H2L1,V2L1,D2L1] = swt2(im2,1,'sym2');
 [A1L2,H1L2,V1L2,D1L2] = swt2(A1L1,1,'sym2');
 [A2L2,H2L2,V2L2,D2L2] = swt2(A2L1,1,'sym2');

 % fusion at level2
 AfL2 = 0.5*(A1L2+A2L2);     **what are these equations ?**
 D = (abs(H1L2)-abs(H2L2))>=0;
 HfL2 = D.*H1L2 + (~D).*H2L2;
 D = (abs(V1L2)-abs(V2L2))>=0;
 VfL2 = D.*V1L2 + (~D).*V2L2;
 D = (abs(D1L2)-abs(D2L2))>=0;
 DfL2 = D.*D1L2 + (~D).*D2L2;

 % fusion at level1
 D = (abs(H1L1)-abs(H2L1))>=0;
 HfL1 = D.*H1L1 + (~D).*H2L1;
 D = (abs(V1L1)-abs(V2L1))>=0;
 VfL1 = D.*V1L1 + (~D).*V2L1;
 D = (abs(D1L1)-abs(D2L1))>=0;
 DfL1 = D.*D1L1 + (~D).*D2L1;

 % fused image
 AfL1 = iswt2(AfL2,HfL2,VfL2,DfL2,'sym2');
 imf = iswt2(AfL1,HfL1,VfL1,DfL1,'sym2');

Answer 1

此处融合等级2的AfL2，HfL2，VfL2，DfL2

近似系数水平细节系数垂直细节系数对角线细节系数

根据概念，在下一级别和他们各自的数学实现也是如此。

阅读概念文档一次非常重要，以便您可以轻松地理解实现，您可以从以下链接中找到信息，您可以直接转到解释概念的框图，然后转到物理实现：

http://ijeetc.com/ijeetcadmin/upload/IJEETC_50e52508758cf.pdf

平稳小波变换（MATLAB）

1 个答案: