Home/ Questions/Q 6828019
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-26T22:20:02+00:00

I am looking for a C++ or Python library to compare two JPEG or

  • 0

I am looking for a C++ or Python library to compare two JPEG or BMP formatted Images.
Here, I want to compare them pixel wise. For instance assume we have Image1 = 500 pixels, Image2 = 500 pixels; now i need to know the color values ie (RGB, R = 24, G = 15, B = 4) for each pixel and compare the same with image2 at the same location.

I also need to have tolerance values acting upon them, if they still have difference crossing this tolerance then i need to have the total percentage difference.

Is there a library out there ? If so please point me to that or give me any suggestions to start with.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    If all you need to do is just comparison pixel-wise, you might achieve better performance by using numpy.

    Numpy is an extremely fast python module that works with n-dimensional arrays (containing all the same type, as it is in the case of pixel data) and by operating on them element-wise.

    So, "tell me were the alpha value of the pixels of two images differs by more than 0.5" would be translated in something like:

    img_one[..., ALPHA] - img_two[..., ALPHA] > 0.5

    HTH!

    • 0