2005.05.31 18:54 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Bob Friesenhahn
EXIF helps reduce ambiguity about the image data (but since everything is marked as sRGB, Adobe RGB or untagged - it doesn't remove it).
Yes, but it also seems that if some software modifies the properties of the image and then re-writes the file with the original EXIF values, confusion is increased since some EXIF tags may now be incorrect for the updated image. Arrrgh! :-)
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/