How to register high resolution images of same modality?
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I have two large tif images (~35000x37000) in grayscale and i'm having trouble registering them. Because of the large resolution, I initially tried downsampling them by a factor of 16, performing intensity-based registration using imregister, and then applying the transform to the original high-resolution image. The issue is I'm unsure how to take into account the scaling factor into the transform matrix.
Another approach I tried was to binarize the images and then perform phase correlation registration, but that had led to an out-of-memory problem. I also tried doing the imregister on the original full-resolution images but it didn't complete quickly (>4 hours). I'd appreciate any suggestions or advice.
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Jan
2022-4-27
If you image is stored in double format, it uses 10 GB of RAM. On a 64 GB machine this should work. So is installing more RAM an option?
"The issue is I'm unsure how to take into account the scaling factor into the transform matrix." - this is much easier to answer, if you post the corresponding code.
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