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2006.03.09 01:57 "tiff headers", by Jasmin Roohi
Hello. I've been trying to alter the content of a tiff header. The tiff header contains the following information: 2 Images, TIFF (compressed) Image Wavelengths=635, 635 Size=1500x3800, 1500x3800 pixels Scaling=10, 10 µm per pixel Image Format=16-bit grayscale PMT Gain=0, 0 Laser Power=100, 100 Normalization Factor=1.000, 1.000 I used the following Linux code to change "Scaling=10, 10 µm per pixel" to "Scaling=5" but had no luck. The images "both layers combined.tif" and "test.tif" are identical except "both layers combined.tif" is compressed. I would be grateful for any help you could give me. Thanks. [roohi@elipc2 roohi]$ ls both layers combined.tif [roohi@elipc2 roohi]$ tiffset usage: tiffset [-s name value] filename [roohi@elipc2 roohi]$ man tiffset No manual entry for tiffset [roohi@elipc2 roohi]$ env | grep MAN [roohi@elipc2 roohi]$ tiffset -s Scaling 5 both\ layers\ combined.tif both layers combined.tif: Can't open a compressed TIFF file with compression for update.. [roohi@elipc2 roohi]$ tiffset -s Scaling 5 test.tif test.tif: Warning, unknown field with tag 700 (0x2bc) ignored. test.tif: Warning, unknown field with tag 34665 (0x8769) ignored. TIFFSetField: test.tif: Unknown pseudo-tag 4294967295. Failed to set Scaling=5 [roohi@elipc2 roohi]$ [roohi@elipc2 roohi]$