ExifTagImageMaskedAreas Property

Gets the MaskedAreas EXIF tag.

Description: This tag contains a list of non-overlapping rectangle coordinates of fully masked pixels, which can be optionally used by DNG readers to measure the black encoding level. The order of each rectangle's coordinates is: top, left, bottom, right. If the raw image data has already had its black encoding level subtracted, then this tag should not be used, since the masked pixels are no longer useful.
Id: 50830 (0xc68e)
Type: Short