rename CV_LOAD_IMAGE_* enums

[trixirt]

On RHEL 9, opencv-4.6.0-7.el9.x86_64 there is this representative build error.

src/caffe/util/io.cpp:76:34: error: ‘CV_LOAD_IMAGE_COLOR’ was not declared in this scope 76 | int cv_read_flag = (is_color ? CV_LOAD_IMAGE_COLOR :

The header containing this enum has moved to opencv4/opencv2/imgcodecs/legacy/constants_c.h And is no longer in the include path.

The replacement mappings are CV_LOAD_IMAGE_COLOR -> IMREAD_COLOR CV_LOAD_IMAGE_GRAYSCALE -> IMREAD_GRAYSCALE

from ./opencv4/opencv2/imgcodecs/legacy/constants_c.h CV_LOAD_IMAGE_GRAYSCALE =0, CV_LOAD_IMAGE_COLOR =1, to ./opencv2/imgcodecs.hpp IMREAD_GRAYSCALE = 0, //!< If set, always convert image to the single channel grayscale image (codec internal conversion). IMREAD_COLOR = 1, //!< If set, always convert image to the 3 channel BGR color image.

Signed-off-by: Tom Rix [email protected]

[trixirt]

A much earlier pr https://github.com/BVLC/caffe/pull/6919