Patent ID: 8107838

Claim:
A method for processing a measurement signal for detecting a property of a toner mark comprising the steps of: producing the toner mark using an image producing device; detecting the toner mark using a measurement device; outputting a measurement signal by the measurement device, a signal curve of the measurement signal being determined; providing a temporal measurement window for detecting a property of the toner mark, said temporal measurement window having a beginning and an end; and carrying out a plausibility check of the determined signal curve, wherein a maximum value and a minimum value of the signal curve are determined, a first difference value between the maximum value and the minimum value is determined and is output for further processing, a first temporal distance is determined between an occurrence of the maximum value and an occurrence of the minimum value, a second temporal distance is determined between at least one of said beginning and end of said measurement window and said occurrence of at least one of the maximum value and the minimum value, and a second difference value is determined between a first distance of said maximum value from a reference value and a second distance of said minimum value from said reference value, and said second determined difference value is compared to at least one of a defined minimum difference value and a defined maximum difference value.