The paper uses a wavelet of edge detection on image fusion.The wavelet constructed by B-spline function is appropriate for edge detection and used for image decomposition in two vertical directions.And then fuse image by the rule which compares coefficients of waveltet transform or compares edge of images.The result of experiment shows the quality of fusion image based on wavelet of edge detection precedes typical wavelets.Also try using edge's pixels only to fuse image and find the quality of fusion image is acceptable

but the number of joining pixels reduces greatly.This method may apply to some image fusion that requires data compression or less storage.