The pen and ink drawing on the left was scanned and placed into Google's Picasa graphic design software package. In order to eliminate a blue color cast, the neutral color picker (under the lighting and control fixes tab) was selected. A blue color cast point was selected with the tool so as to eliminate the blue color cast. Although the blue cast in the image was eliminated in Picasa, when uploaded to blogger, as you can see, the blue cast was not completely eliminated.
In order to eliminate the blue cast (and for that matter any other color cast) for a scanned pen and ink illustration, Picasa's infrared film icon was used (under the under the useful image processing menu).
As you can see on the drawing on the left, the blue cast was completely eliminated. Not only in Picasa, but also on blogger.
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