Abstract: In some examples, a smartphone or tablet includes a device able to generate a digital identifier of a copy that includes at least one print image. The device includes at least one optoelectronic detection device that detects the at least one print image and creates a representation that includes a multiplicity of pixels. The device further includes a unit that evaluates brightness intensities of the pixels, that segments the representation into multiple fields that each are composed of pixels of the representation, and that provides each of these fields with a piece of position information. The unit also ascertains, in each of these fields of adjoining pixels, a difference in their respective brightness intensities, and displays the differences as a frequency distribution. A display device further displays the digital identifier of the respective copy of the relevant printed product in the form of a graphical and/or alphanumerical display.

Abstract: In some examples, a smartphone or tablet includes a device able to generate a digital identifier of a copy that includes at least one print image. The device includes at least one optoelectronic detection device that detects the at least one print image and creates a representation that includes a multiplicity of pixels. The device further includes a unit that evaluates brightness intensities of the pixels, that segments the representation into multiple fields that each are composed of pixels of the representation, and that provides each of these fields with a piece of position information. The unit also ascertains, in each of these fields of adjoining pixels, a difference in their respective brightness intensities, and displays the differences as a frequency distribution. A display device further displays the digital identifier of the respective copy of the relevant printed product in the form of a graphical and/or alphanumerical display.

Abstract: According to the card reading device (20) for a self-service terminal comprising a intake compartment (13) for a card (11) containing data to be read, wherein the self-service terminal comprises at least one sensor (6A, 6B) and an evaluator device connected hereto and the card reading device (20) is protected against manipulation attempts by arranging at least one sensor in the card reading device (20) and at least one linearly extending sensor arrangement (6A,6B) that is attached in the intake compartment (13), wherein the evaluator device (4) checks at least one spatial dimension (1,b) of the card via the sensor arrangement (6A, 6B). Preferably the sensor system is a sensor arrangement comprising a plurality of linearly extending sensor elements that extend in a first direction (X) or a second direction (Y) in relation to the card (11) retracted into the intake compartment (13).