[Solved] OpenCV error: #error “This header with legacy C API declarations has been removed from OpenCV.

Error reporting details

Error reporting reason

In the opencv version you are currently using, the definition declaration related to legacy C API has been removed, and the content of legacy can still be from legacy/constants_c.H from the header file.

Therefore, the solution is also obvious. Open the error file directly, delete the original part of the error header file, and replace it with legacy/constants_c.H.


Open the cpp file with error
find the error header file location:

Delete the code of the header file containing the error and replace it with:

#include "opencv2/imgcodecs/legacy/constants_c.h"

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