Re: 16 bit image visualization

Posted by Gabriel Landini on May 01, 2017; 9:55pm
URL: http://imagej.273.s1.nabble.com/16-bit-image-visualization-tp5018625p5018649.html

On Monday, 1 May 2017 21:07:26 BST you wrote:
> Hi Jeremy- I realize that you can only see 8 bits, but you should be able to
> visualize 8 bits worth of data from different ranges of the 65000 gray
> levels in the image.  I can easily look at 8 bits of bright pixels, but I
> can’t look at 8 bits of medium brightness or 8 bits of just over background
> information.  

If you want multiple ranges, then the LUT is not linear anymore, so perhaps
something like histogram equalisation or a log transform of the image would
help? Then convert to 8 bit.

On 8 bit level of perception, I understand that some people can see more. High
end radiological displays show more than 8bit of greyscale levels (e.g. 10 or
12 bits).
When dealing with colour LUTs you can easily get into noticeable stepping
effects on smooth gradients too (depending on the range of colours the LUT is
representing).

Cheers
Gabriel

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