LibTiff Mailing List
TIFF and LibTiff Mailing List Archive
June 2011
Previous Thread
Next Thread
Previous by Thread
Next by Thread
Previous by Date
Next by Date
Contact
The TIFF Mailing List Homepage
This list is run by Frank Warmerdam
Archive maintained by AWare Systems
Thread
2011.06.24 23:57 "Re: 16-bit image", by Chris Cox
The min/max sample values are metadata, and don’t affect interpretation of the file data. So even if wrong, they shouldn’t cause the symptoms described. I do wonder if the byte order of the data might be wrong, and it’s picking up the low order bits of the image. Chris On 6/24/11 3:50 PM, "Leandro Bugnon" <l.bugnon@gmail.com> wrote: Thanks for the quick answer. Here is a test image * http://www.filefactory.com/file/cc0b359/n/test1.tif Another thing that cannot understand is that TIFFTAG_SMINSAMPLEVALUE / TIFFTAG_SMAXSAMPLEVALUE remains in zero value but I changed that in the code. 2011/6/24 Bob Friesenhahn <bfriesen@simple.dallas.tx.us> On Fri, 24 Jun 2011, Leandro Bugnon wrote: Hi, I'm getting a 14bit image from a CCD cam, and save it in a 16bit. The problem is that, if I take only 2 gray values (greater than zero and less than 2^14), the viewers that I try (imageJ and irfanview) take them as zero and max valuo (black and white), they don't show the real color. How can I fix it? I've tryed the next tags: The values are correctly saved, but it always show a full black and full white value when there isn't any zero or 2^16 value. I am not immediately seeing a problem with your tags. Perhaps the pixel values are wrong, or perhaps this is a problem with these viewers. Are you able to post a sample TIFF file somewhere so we can download it and see how it is constructed? Bob