2011.06.24 23:57 "Re: [Tiff] 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>

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?