EXIFTAG_GAINCONTROL  631 3rdparty/libtiff/tiff.h #define EXIFTAG_GAINCONTROL		41991	/* Gain control */
EXIFTAG_GAINCONTROL  637 3rdparty/libtiff/tiff.h #define EXIFTAG_GAINCONTROL		41991	/* Gain control */
EXIFTAG_GAINCONTROL  638 3rdparty/libtiff/tiff.h #define EXIFTAG_GAINCONTROL		41991	/* Gain control */