Image processing

[MarkMLl]

I took a photo today and noticed that the camera I was using (an Olympus E520) had a stuck pixel.

Leaving (please!) language chauvinism aside, is anybody aware of a simple program that can fix such things (e.g. by averaging the surrounding pixels), or is it worth writing and publishing something from scratch?

MarkMLl

[cdbc]

Hi
I would think, that is a job for "ze gimp"...? I seem to remember having read somewhere, it's got tools for this type of thingy, but boy is that an advanced piece of kit, I wouldn't know where to start looking...
...How about 'LazPaint', it can also do all sorts of clever stuff, @circular would know that.
Regards Benny

[MarkMLl]

Hi
I would think, that is a job for "ze gimp"...? I seem to remember having read somewhere, it's got tools for this type of thingy, but boy is that an advanced piece of kit, I wouldn't know where to start looking...
...How about 'LazPaint', it can also do all sorts of clever stuff, @circular would know that.
Regards Benny

Gimp's got tools for just about everything, but you can't- using one particular idiom- say from the commandline "this file's got a one-pixel error at xx,yy, fix it by averaging from its neighbours".

Lazpaint... well, I played with it last Summer and was just about able to produce some basic bitmaps.

In any case, I think the important thing is to be able to batch-fix images, i.e. since the position of the dud pixel is known without needing any interaction.

MarkMLl

[VisualLab]

In any case, I think the important thing is to be able to batch-fix images, i.e. since the position of the dud pixel is known without needing any interaction.

If so, there are two options to choose from:

• writing a script in some language, I'm not saying which one on purpose because it's disgusting and besides, I don't like snakes because they're deceptive and malicious - ask Eve, she'll confirm that it's true
• writing your own simple program, preferably in Lazarus

[TRon]

If the image is raw then you could perhaps give it a try with dcraw.

[MarkMLl]

If the image is raw then you could perhaps give it a try with dcraw.

Ah yes, that looks interesting.

writing your own simple program, preferably in Lazarus

I think that when I have time I'll knock together something "quick and dirty", influenced by dcraw but intended to cater for the most-common case i.e. JPEG and possibly annotating the metadata with the fact that it had been run (after participating in various "legal crap" and watching other stuff from afar I think traceability is important).

So far it looks like it's only a single pixel, but dcraw's idea of a .badpixels file tailored to each camera is a good one.

MarkMLl