|Exif TIFF Tag SubjectLocation|
TIFF Tag Reference
TIFF Tag SubjectLocation
Indicates the location of the main subject in the scene.
The value of this tag represents the pixel at the center of the main subject relative to the left edge, prior to rotation processing as per the Rotation tag. The first value indicates the X column number and second indicates the Y row number.
When a camera records the main subject location, it is recommended that the SubjectArea tag be used instead of this tag.