Hi Carlos,
Thanks for the advice about median filter. I will do some experiments.
When taking a photo with high ISO on a digital camera, there will be
many pixels that have a random color that is completely different color
from the expected one. But the photo still has a good sharpness
ImageMagic uses a stategy that is similar to the median filter: it looks
at the neighborhood o a pixel. If the color of the pixel is considerably
different from the color of adjacent pixels, then the color of the pixel
is changed to a color close to the neighborhood. If not, the pixel is
preserved.
It seems that the median filter always changes the color of the pixel,
and I am afraid that the image might loose sharpness.
I already considered using bindings for gimp, but only found information
about writing gimp plugins in python. Does the binding allow me to
control gimp from a python script that I run on a bash console?
Best regards,
Daniel Felix Ferber
Carlos da Silva Santos escreveu:
Daniel,
I don't know much about high ISO noise, but a standard way of removing
noise while preserving edges is using a median filter:
http://www.pythonware.com/library/pil/handbook/imagefilter.htm
If your goal is only running the whole pipeline from python, you might
install the python bindings for Gimp and try to use the Gimp filter
from python.
I hope this helps.
[]s
Carlos
On Dec 19, 2007 2:05 AM, Daniel Felix Ferber
<[EMAIL PROTECTED]> wrote:
Hi!
I was wondering if PIL has a filter or enhancement in order to remove
noise from photos that were taked with high ISO. Gimp and ImageMagic
both have such a feature and it work very good.
I tried to use SMOOTH or SMOOTH_MORE filter. But there are better
strategies to remove high ISO noise that try to preserve sharpness of
the image.
Currently I am calling ImageMagic from within my python script, but I
would prefer if PIL would handle it. Is this possible in current version
of PIL?
Best regards,
Daniel Ferber
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