There is an easy way to get around that though and that is simply to change the tag which says which way pixels are ordered in the image. It is equally likely that the file increases in size than it would decrease. If you consider Run-Length-Encoding (RLE) which a common TIFF encoding, it is easy to understand why the same image will not compress to the same size after being rotated. There reason why the file size changes when rotated is that TIFF files are encoded losslessly as one would compress a stream of pixels components from one corner of the image to the opposite one. It is possible and even trivial but I am not aware of any application to do that task specifically. (2013 rMBP) - (OS X 10.11.4) - (I am open to Windows programs, too.) I did a search and all I found were JPEG programs. I tried IrfanView on Windows and it also increased the file size about 60%.Īre there any applications that can rotate a TIFF image 90 degrees without re-encoding it and altering the image in any other way? The source of the TIFF is a scanner, which does not offer a rotation feature. All I did was rotate the TIFF and save, and the file size increased about 60%-it's even worse than Preview. (Interestingly, Preview.app does not increase the file size if you rotate a PDF.) This size difference may not matter much on a 5 MB file, but on a 500 MB file, it is a nuisance. This results in a file that is 10% to 20% larger than the original, with no added benefit. One thing I don't like about Preview.app is that even something as simple as rotating an image 90 degrees requires Preview to re-encode the file, adding an alpha channel in the process. This is a followup to a question at, Why does rotating a TIFF in Preview increase the file size?
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