Another issue with STF (PI1.5.9.561)

[Yuriy Toropin]

Hi, see screenshot below,
The image is a color one where minimum values in all channels are at 0.5+ values (see statistics).
Nontheless, AutoStretch put the left sliders at 0 at all three channels (see STF Parameters), not close to minimum values...

From my perspective, this is odd behavior, another screenshot shows what could be expected for AutoStretch STF.

Thanks,
   Yuriy