2011.06.24 22:50 "Re: [Tiff] 16-bit image", by Leandro Bugnon

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>

> 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?

> bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/** > users/bfriesen/ <http://www.simplesystems.org/users/bfriesen/>

GraphicsMagick Maintainer, http://www.GraphicsMagick.org/

--

Leandro