Flood Select

[DarkClown]

I was trying to do a flood selection on this picture (bright areas) to seperate the boot from the BG:



Inverted the selection, copied the new selection to a new layer and disabled the old background. I got the following result:

 

I would have expected a somehow smooth gradient to transparent and not this sharp and rectangular blocks as visible in the second picture? Did I do something wrong?
(Of course I can easily erase these unwanted areas ...)

[sDuccio]

bring down the tolerance percentage to something more satisfying. I'd rather use the selection brush, then refine, in order to cut out the background

[DarkClown]

Wouldn't even any kind of tolerance give you smooth edges instead of theses rectangles? Of course I generally use the flood fill first, than rework the details with the selection brush and do the refinement on the edges ...

[sDuccio]

try the background erase brush, it's cool. You can pick the colours by clicking the ALT then erase only the selected colours. You can also exploit its smart features.

Check this out:

[DarkClown]

Thanks for the video! Interesting approach. But it seems I don't get the colour picker when pressing the ALT key ....

[sDuccio]

In the video I do not pick: the tool identifies itself the colour average to erase, due to its smart algorithm. Whereas you point on a colour, press ALT + left mouse button, it picks the average colour, then you can erase all the matching colour areas. The same can be done with flood erase tool