How do I remove noise and smooth out pics?

Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
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imagewinter
Posts: 15
Joined: 2008-02-20T16:03:49-07:00

How do I remove noise and smooth out pics?

Post by imagewinter »

Pics done with a 1 or 2 mpx camera or something. How do I remove/reduce noise and smooth out pics?
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fmw42
Posts: 25562
Joined: 2007-07-02T17:14:51-07:00
Authentication code: 1152
Location: Sunnyvale, California, USA

Re: How do I remove noise and smooth out pics?

Post by fmw42 »

please post a link to a small example image showing the kind of noise and resolution of the noise. there are many ways, but they depend upon the noise and scale/resolution of the noise how effective they are.
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imagewinter
Posts: 15
Joined: 2008-02-20T16:03:49-07:00

Re: How do I remove noise and smooth out pics?

Post by imagewinter »

How do I make this grainy pic into a smooth one?

http://img683.imageshack.us/img683/1556/cat3r.jpg
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fmw42
Posts: 25562
Joined: 2007-07-02T17:14:51-07:00
Authentication code: 1152
Location: Sunnyvale, California, USA

Re: How do I remove noise and smooth out pics?

Post by fmw42 »

imagewinter wrote:How do I make this grainy pic into a smooth one?

http://img683.imageshack.us/img683/1556/cat3r.jpg

You can try several function: -median, -despeckle, -enhance.

Or you can try some of my noise filtering scripts, see link below.
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