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June 2011
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2011.06.25 01:19 "Re: 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/