sharpen (or other Function) only in a part of a picture

[Pierre St]

hi

i want to sharpen only a small rectangle .. not the whole picture...

how can i define this part of the picture ?

and then... use the 'normal' sharpen function ?

regards
Pierre St

[xnview]

hi

i want to sharpen only a small rectangle .. not the whole picture...

how can i define this part of the picture ?

and then... use the 'normal' sharpen function ?

Currently it's not possible...

[MaierMan]

not possible means:
do a workaround

a) Get the rect into another picuture (crop-copy or something like this)
b) Apply the filters (i.e. sharpen)
c) bitblt the stuff back

alternative:
Develop your own filter (i.e. sharpen) implementation that works like you desire.