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August 2007
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2007.08.20 01:34 "can libtiff deal with this file? [re-sent]", by Abraham D Smith
I have hundreds of gigabytes of microscope images which libTiff cannot seem to handle properly. Indeed, the only program on Linux which can seem to handle these files is the NIH's ImageJ. Every libtiff-based image viewer seems to truncate the brightness. A sample file can be found here http://tock.no-ip.org/~abe/test.tif Here is a side-by-side comparison of how ImageMagick (using libtiff 3.8.2) displays the image, and how ImageJ correctly displays it: http://tock.no-ip.org/~abe/screen.png tiffinfo (v 3.8.2) gives this info for the file. TIFF Directory at offset 0x8 (8) Subfile Type: (0 = 0x0) Image Width: 992 Image Length: 800 Bits/Sample: 16 Compression Scheme: None Photometric Interpretation: min-is-black Samples/Pixel: 1 Rows/Strip: 800 Planar Configuration: single image plane ImageDescription: ImageJ=1.37v min=457.0 max=16383.0 ImageJ gives this info for the file: Title: test.tif Width: 992 pixels Height: 800 pixels Coordinate origin: 0,0 Bits per pixel: 16 (unsigned) Display range: 457 - 16383 No Threshold Magnification: 0.75 Uncalibrated Path: /home/abe/Desktop/test.tif No Selection Any help on getting libtiff to handle this file would be greatly appreciated! Thanks, Abe Smith
