Re: Adjusting contrast and brightness

David Fox (dsfox@cogsci.ucsd.edu)
03 Dec 1998 09:29:07 -0800

Oliver Rauch <oliver.rauch@Wolfsburg.DE> writes:

> William L. Sebok wrote:
>
> > David Fox says:
> > > What I miss from the Windows scanning software is the way it could
> > > automatically choose good settings for the brightness and contrast
> > > based on the selected section of the preview. I'm interested in
> > > implementing this for xscanimage, can anyone point me to a good
> > > algorithm for doing this, or to a source of good algorithms?
> >
> > Actually, automatically choosing brightness, contrast and gamma
> > from a selection on the preview is exactly the feature on the
> > windows driver for my Umax S12 that I miss most in sane. That and
> > being able to zoom the preview window to make a decently precise
> > selection.
> >
>
> Will all be included into my new frontend.
> Online gamma/contrast/brightness-changes already work,
> automatic contrast/brightness is easy to implement.
>
> I think I will make a pre-alpha-version available next week!

I'm looking forward to it! I'd also be interested in hearing how this
is implemented. It ``feels'' like at least a semi-difficult problem
to me.

-- 
David Fox           http://hci.ucsd.edu/dsf             xoF divaD
UCSD HCI Lab                                         baL ICH DSCU

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