[sane-devel] Re: bug in XSANE?

[Karsten Festag]

Hi Oliver,
O.k., I didn't thought enough what happens to the data if one applies a
function to it... I think I understood it now. But: even if I reset the
color corrections directly before the scan, the histogram has its
spikes+holes. But there is no visible difference between an image
scanned by xscanimage and xsane, both with linear transfer function. So
I won't complain.

Regards

Karsten


Oliver Rauch wrote:
> 
> when you set color corrections to default value:
> gamma=1.0, brightness=0, contrast=0 before you do
> the scan/preview scan the histogram should not
> have any spikes/holes.
> 
> When you use other color correction values with xsane
> or define a custom gamma table with xscanimage
> you will get the spikes/holes.
>