2009.03.04 19:17 "[Tiff] Alter TIFF Orientation", by Kevin Myers
I received a number of extremely large TIFF images where the orientation value in the TIFF header has been incorrectly set to BOTTOM in the header rather than TOP, and that is causing the images to be displayed upside-down. In theory I might be able to rotate these images 180 degrees using something like GraphicsMagick without changing the orientation value, but that would be extremely slow. All that I really need to do is change the orientation value in the header from BOTTOM to TOP. Are there any utilities that allow this simple change to be performed?