2011.06.24 20:40 "[Tiff] 16-bit image", by Leandro Bugnon

2011.06.25 01:19 "Re: [Tiff] 16-bit image", by Bob Friesenhahn

On Fri, 24 Jun 2011, Leandro Bugnon wrote:

The image was made that way intentionally. My problem is that if I have a stack with 2 images or slices, some of the viewers I've tryed define the display range between the min and max of the first image. In the test image,

>  the value 500 is represented in black  and 700 in white, so the second image (1000-1400) it's completely white. 

I cannot scale the image becouse it's for cuantitative microscopy, and the values goes from 0 to 2^14, so if I have a image from 500-700, it have to be almost dark and darker than the second image. I supposed that had some tag missed, but it seems not. The pixel values are correctly saved, the problems seems the visualization info to show them in a scale from 0 to 2^16 ( I can scale from 0-2^14 to 0-2^16 but I cannot scale anything to 0-2^16 becouse I'm distorting the information).

The traditional sort of image viewers you tried (imageJ and irfanview) are really intended for images scaled to ranges for normal viewing on

an 8-bit display. You will need a scientific/remote-sensing sort of display application to make sense of your images.

Bob
--
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/