[Digikam-users] blueish shadows near high contrast

Dudas Gabor dudasg at freemail.hu
Sat Mar 25 07:58:58 GMT 2006

Roberto Winter írta:
> hello,
> i don't really know if this is off topic or not, sorry if this is not 
> the appropriate question for this list.
> but i've noticed lately that most of my images have something that 
> really annoy me. the thing is this blueish shadow thing near high (or 
> not so very high) contrast areas (see attachment).
> i'd really like to know if anyone can point me to a way of dealing 
> with this since it invariably "uglifies" my pictures.
> thanks a lot!
> roberto

This is called "purple fringe". This effect is coming from the lenses. 
It is a form of chromatic aberration (CA), and I would say it is 
"normal" on low end cameras/lenses. If you want to avoid this, usually 
you have to spend a lot :) (eg. buy a DSLR and lenses with low CA)
If you are more interested go and type purpe fringe into google.


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