Abstract: A method for testing a valuable document including illuminating the valuable document line by line such that a first group of lines is illuminated with light of a first wavelength and a second group of lines is illuminated with light of a second wavelength, reflection light that is reflected from the lines and/or transmission light that passes through the lines. First data are representative of the reflection light and/or transmission light assigned to the lines of the first group and second data are representative of the reflection light and/or transmission light assigned to the lines of the second group. Further, processing the first data such that a first image generated from the first data has a first resolution, and the second data such that a further image generated from the second data has a second resolution, comparing the first and second images with first and further reference images.

Abstract: In various exemplary embodiments, a method for testing a valuable document (22) is provided, wherein: the valuable document (22) is illuminated line by line in such a way that a first group of lines (42, 46) of the valuable document (22) is illuminated with light of a first wavelength and that at least one second group of lines (42, 46) of the valuable document (22) is illuminated with light of a second wavelength, wherein at least partly lines (42) of the first group and lines (46) of the second group alternate, reflection light (34) that is reflected from the lines (42, 46) and/or transmission light (35) that passes through the lines (42, 46) are/is detected in a manner assigned to the lines (42) of the first group and the lines (46) of the second group, wherein first data are representative of the reflection light (34) and/or transmission light (35) assigned to the lines (42) of the first group and second data are representative of the reflection light (34) and/or transmission light (35) assigned to the li