2017.01.20 19:54 "Re: [Tiff] Fwd: TIFF image displayed upside down", by Bob Friesenhahn
TIFF provides the TIFFTAG_ORIENTATION tag to obtain the image orientation.
as I have mentioned, the orientation is ORIENTATION_TOPLEFT, so it should be good, no?
Sorry, I missed that. It is quite possible that the file has the tag wrong. It is very easy for an application to get the tag wrong, particularly if it did not create the original image.
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/