Re: "Appearance" autoscaling tones

Posted by Gabriel Landini on May 29, 2016; 7:22am
URL: http://imagej.273.s1.nabble.com/Appearance-autoscaling-tones-tp5016544p5016545.html

On Saturday 28 May 2016 21:49:52 Jerry  Sedgewick wrote:

> I’m trying to view 16-bit images so that these appear without being modified
> for display purposes. I would expect that setting the File>Appearance to
> 16-bits (versus Automatic) would then provide a view that reflects the true
> tonal values in the images: consistently dark images. As it is, if any
> image contains a bright white object the display shows a completely black
> background for a fluorescent image, but if an object is faint the
> background becomes dark gray and I can see readout noise (or whatever). I
> don’t want the tones in the image auto-scaled for viewing purposes. I would
> expect that setting the File> Appearance to 16-bits would eliminate
> auto-scaling of tones for display purposes.

Hi Jerry,
Currently there are no 16bit LUTs in IJ. The LUTs are all 8bits. The setting
on the Option>Appearance is for setting the range of the LUTs, but the number
of steps within that range are always 256.
Applying a range to the LUT should not modify the data in the image, only what
you see.

Cheers

Gabriel

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