The hook which writes the raw image is called before the JPEG file is created, thus enabling watermarking in the raw image domain. Further, the raw image can be decoded with eg. dcraw. Straightforward additive spread-spectrum embedding is detectable in the demosaicked image -- haven't tried the JPEG yet.

posted at: 17:30 | path: /projects/CHDK | permanent link

Was at Ranger/Rover scout camp, Grenzen-los 2008 in Vienna (Donauinsel) from May 10 - 12. Plenty of sunshine, too much Ottakinger.
Photos are here.

Next year's camp, Gigagampfa, is in Vorarlberg. Let's see...

posted at: 17:21 | path: /fun/scouting | permanent link