[buug] Raw image processing tools

Ian Zimmerman itz at buug.org
Sat Aug 14 11:19:03 PDT 2010


Joseph Zitt:

> Image processing is a rather wide scope. What are you trying to do?

The things the camera firmware does for you if you take JPEG images.
That usually includes most (ideally, all) of the following:

1. demosaicing
2. sharpening
3. noise reduction
4. white balance adjustment
5. saturation adjustment
6. exposure adjustment
7. restoration of detail in highlights and (especially) shadows
8. scaling down to a resolution suitable for output
9. exporting to JPEG or TIFF

typically the tool has a "batch" mode where you save your settings and
then apply them en masse to a whole collection of images (otherwise,
doing all of the above steps manually would be far too time consuming).

GIMP has a lot of these algorithms, but it can (currently) only work on
8-bit images, which means you lose some color resolution before you even
start, and GIGO applies.  That's why the specialized tools exist.

-- 
Ian Zimmerman <itz at buug.org>
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