16-bit image contrast

[Kurt De Vos-2]

Dear,

Looking at some 16-bit images i noticed that ImageJ only
shows a partial range of gray values in the contrast adjuster
and histogram function (e.g 495 to 5512)  and contrast adjuster
  does not allow me to go beyond those values with the sliders (e.g  
to 0).
I can get the 0-65534 range back by setting the max and min display  
values,
but every time i adjust the contrast i drop back in the  
(automatically computed?) partial range.
Is there a way to prevent this automatic changing of the display  
range and to keep
it at full range while changing contrast?

Kurt


*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*
MRC Centre for Neurodegeneration Research,
Department of Neuroscience, P037
The Institute of Psychiatry, King's College London
De Crespigny Park, Denmark Hill
London SE5 8AF
UK

Tel. [phone]
Fax [phone]
Email [hidden email]

web http://cnr.iop.kcl.ac.uk/
*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*

[Peng Xi-2]

Hi,
    Image->Adjust->Brightness/Contrast->Set, and you can set it to the
value you need. It will also ask you whether you wish to apply this set
value to other opened images.

Peng

Dantus Research Group
Department of Chemistry
Michigan State University
East Lansing, MI 48824
Tel: [phone] x319
Email: [hidden email]
http://www.msu.edu/~xipeng/


Kurt De Vos wrote:

> Dear,
>
> Looking at some 16-bit images i noticed that ImageJ only
> shows a partial range of gray values in the contrast adjuster
> and histogram function (e.g 495 to 5512)  and contrast adjuster
>  does not allow me to go beyond those values with the sliders (e.g to 0).
> I can get the 0-65534 range back by setting the max and min display
> values,
> but every time i adjust the contrast i drop back in the (automatically
> computed?) partial range.
> Is there a way to prevent this automatic changing of the display range
> and to keep
> it at full range while changing contrast?
>
> Kurt
>
>
> *--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*
> MRC Centre for Neurodegeneration Research,
> Department of Neuroscience, P037
> The Institute of Psychiatry, King's College London
> De Crespigny Park, Denmark Hill
> London SE5 8AF
> UK
>
> Tel. [phone]
> Fax [phone]
> Email [hidden email]
>
> web http://cnr.iop.kcl.ac.uk/
> *--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*
>