Image Lookup Table Generation

Question

Jon Conger 2017-9-2

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https://ww2.mathworks.cn/matlabcentral/answers/354931-image-lookup-table-generation

评论： Jon Conger 2017-9-2

Is it possible to perform a number of image transform operations on an image and generate a lookup table that maps each original pixel location to its new location? I want to use this LUT output as an input in a different software to mass-process the same pixel reassignment on each frame of streaming video.

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Answer 1

Walter Roberson 2017-9-2

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https://ww2.mathworks.cn/matlabcentral/answers/354931-image-lookup-table-generation#answer_280049

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Provided the transformations only move entries:

temp_img = reshape(1:numels(YourImage), size(YourImage));

Now do your transformation on temp_img . The result will be an array of linear indices:

mapped_idx = Do_all_the_moving_transformations(temp_idx);
example_mapped_image = YourImage(mapped_idx);
another_mapped_image = YourOtherImage(mapped_idx);