18.4.3 Problematic logos from pre-printed letterheads
When you use pre-printed letterheads you must be very careful!
WRONG!!!!!
RIGHT!!!!!
The first picture shows you part of a pre-printed letterhead. All that is green is part of the pre-printed logo. What is printed in black was printed onto the sheet afterwards. As you may easily notice the printing is awry.
If you use the green bar as logo, the objects cannot be properly positioned because the information was not printed in alignment with the logo (here: bar). In such a case use that part of the letterhead that was printed later (here: 'Hommel...'); the objects may be awry but they are correctly awry in relation to the logo. The form recognition module will not have any problems to extract the objects properly.
Note: It goes without saying that this procedure is only possible if there is an element in the individually printed part of the letterhead that lends itself to logo recognition. Printed script nameplates of a font size of 15pt or more as well as any frames or lines make good 'logos' in our sense of the word.