An imposing apparatus determines at least one pair of line components included in positioning marks based on the positional relationship between particular line components in a page region, and estimates marking positions for the positioning marks based on the shape of the pair of line components. Privacy standards include frequency criteria governing the storage of datasets including information associated with networked media consumption activity collected from the source privacy zone. Each of the data lines is driven by the corresponding driver unit. The tracking apparatus models a delay and widening characteristics of the digital system and operates in parallel with the digital system. A second side of the sheet is registered in a second pass in response to detection of the registration marker deposited on the sheet.