I have two aerial photos, a RGB and a InfraRed, this photos are without lens distortion, and are the same size and with the same field of view (99%). I need to make a 4 band image, so i detect some features using ORB, find a homography and use warpperspective to align the photos, but its not good enough, i found some offsets. The photos are big, the size is 11608 x 8708, so when i use SIFT or SURF, my desktop freeze or i have problems with memory. I tried to use FlannMatcher, use BFMatcher, use a mask with photos and used SIFT/SURF, and still not good enough. I know that with this images i can take a perfectly 4 band images because i used another app and it was great, but i need to know how to do this with Opencv. What i can do ?
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