I soometimes scan the financial papers such as the Financial Times which is printed on "pink" paper.
I scan in Gray mode at a resolution of 600 and save as a jpeg
Clean the images with the following command
jpegtopnm kscan_0001.jpeg | pamditherbw -threshold -value 0.50 | pamtopnm > kscan_0001.pbm
then in kooka ocr the kscan_0001.pbm image
both gocr and ocrad work on my system. ocrad gives by far the better result. For me ocrad has a 3% errror rate whereas gocr on the same document has a 30% error rate.
I would suggest that you scan your document and try ocrad and gocr at the command line.
Looking at the code ksaneocr.cpp my inpression is that kooka will only ever use ocrad or, if available, Kadmos. This page suggests that there may be a change on the way http://cvs-digest.org/index.php?diff...evision=434828