about ‘mosaïc’ attack

http://www.petitcolas.net/fabien/watermarking/2mosaic/index.html

Splitting a image and then reconstruct using html tables in order to breakup the watermark is interesting. To add variation, you could even cut up the the shape in non-rectangular form and use layers to merge as one.

Other techniques include applet, activeX, flash.

Though if you just want the image, a simple Vista Snipping tool or screen grabber tool will let you screen shot the image.

any image manipulations will usually degrade the image and thus sometimes destroying the watermark.