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Editorial Team
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Asked: 2026-06-13T16:57:10+00:00

I’m want to try using look up table (cvLUT) to check whether it is

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I’m want to try using look up table (cvLUT) to check whether it is fast than the current way that I’m doing right now. The question is I don’t really understand how look up table works if I have different set of values Eg.

if(mean < 50)
 //do gamma correction
else if(mean > 50 && mean < 100)
 // do gamma correction
else 
 //do do gamma correction

I saw that we need to calculate the look up table first but the mean is calculated locally using local window. How can I do that? I tried stored the mean values in the vector and then use it but it is very slow when it’s stored in the vector.

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1 Answer

  1. Editorial Team

    I don’t think a lookup table is appropriate for what you are doing since the transformation is dependent on information in the local window. A lookup table is good if you want a transformation on all pixels that only depends on the pixel value and doesn’t depend on the value of other pixels.

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