I use OpenCV for android.
I would like to know how the image can be automatically corrected (contrast / brightness) using the OpenCV library or can it be done in a native way? (Via the ColorMatrixFilter from Android ).
I tried to google, but did not find an imputed tutorial / example on this topic.
How can this be done?
Thank you
Despite the fact that the recovery algorithms for unevenly lit images are numerous, OpenCV currently does not provide something ready-made from the box. Nevertheless, the network has many examples of implementation, and just using OpenCV.
The most common algorithms are based on Retinex (a bit of a related theory on the Russian wiki: Color Constancy ), but I would like to highlight the site, if I'm not mistaken, of the Croatian developers - "Image Processing Group" . It presents in free access not only the source code (C ++ / OpenCV, GNU GPL license), but even a tool that allows you to personally evaluate the results of the algorithms directly in the browser.
Source: https://ru.stackoverflow.com/questions/464214/
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