How to apply pixel shift to individual pixels in image file?

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Massimiliano 2015-3-3

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https://ww2.mathworks.cn/matlabcentral/answers/181349-how-to-apply-pixel-shift-to-individual-pixels-in-image-file

评论： Massimiliano 2015-3-30

I have a gray-scale image file (1024 rows by 1024 columns). The gray values range from 0 to 65535 (16-bit). I also have a distortion correction map (same size as the image file) which indicates how each pixel in the first image must be shifted to create the new 'corrected' image.

I've found several forum posts giving examples on how to apply a shift equally to all pixels. However, in my case, I'd like to apply different shifts to different pixels. In some cases, the shift could also be sub-pixel (in which case, I can imagine I'd have to first split each pixel into sub-pixels).

Thank you in advance for your help.

Massi

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Answer 1

Ashish Uthama 2015-3-3

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Have a look at the displacement field syntax of imwarp. Depending on the format of your distortion correction map, it might be as simple as a direct call.

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Massimiliano 2015-3-30

Thank you, Ashish, for the response. I've looked at IMWARP and it looks like what I need. However, I am running into other issues with regards to its implementation. I'll pitch another question on the forum. Thanks, again.

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