Finger removal

Some originals cannot easily be placed open on the book cradle or the support table. Especially modern magazines or books and files with a tight binding usually do not stay open. They tend to close again, which makes scanning much more difficult. In this case, it usually makes sense to work with a glass or Makrolon© pressure plate. These plates hold the original in position and at the same time gently press the pages flat to improve the scanning result.

However, such plates are often troublesome, especially in the public sector, because they are prone to scratches and damages due to heavy use and improper handling. For this reason, difficult originals are often held down with the thumbs on the left and right during the scanning process. This means that fingers are often scanned as well, which is very annoying and undesirable. However, they do not pose a problem for our scanners. To remedy this shortcoming, our “Easy Scan” software offers the option of retouching these areas using the optional “Fingerprint Removal” function. The fingers are detected on the original and removed from the image using a logarithm.

Attention: This function is a subsequent image manipulation, which improves the optical perception, but no longer corresponds to the content of the original. Basically, all our systems are designed to create a color-accurate and true digital copy of the original. Such subsequent manipulation no longer complies with this principle.

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