Abstract: In one implementation, a system for using a physical document for navigation includes a receiver engine to receive an identifier location corresponding to an area selected on the physical document, a location engine to determine a location within a digital representation of the physical document corresponding to the identifier location, and a display engine to display information relating to the identifier location based on the identifier location and the corresponding location within the digital representation of the physical document.

Abstract: In one implementation, a system for using a physical document for navigation includes a receiver engine to receive an identifier location corresponding to an area selected on the physical document, a location engine to determine a location within a digital representation of the physical document corresponding to the identifier location, and a display engine to display information relating to the identifier location based on the identifier location and the corresponding location within the digital representation of the physical document.

Abstract: The present invention provides a method to detect ink short in a print head and an apparatus that performs the method. The method provides the steps of obtaining a density profile and a current consumption profile of an image to be printed and using the profiles to detect a low-resistance ink short or a non-low resistance ink short in a print head.

Abstract: A method and apparatus for producing a document having human-readable content and a position identifying encoding pattern. A printer places text or other content onto a substrate, such as paper, and a filter material application system applies transparent filter material to at least a portion of that content to only modify the reflectivity of the content at a predetermined wavelength. Because the reflectivity of the position identifying encoding pattern remains unchanged, it is distinguishable from the content and can be read at the predetermined wavelength. The position identifying pattern can take a number of forms including a number of dots printed at predetermined positions on the substrate on an imaginary grid.

Abstract: Embodiments of creating a density profile associated with an image, predicting a highest expected temperature associated with a printhead using the density profile prior to printing the image, and delaying printing the image prior to beginning the printing of the image in response to the highest expected temperature exceeding a threshold are disclosed.

Abstract: Embodiments for distributing print density are disclosed.

Abstract: Embodiments of printing using a subset of printheads are disclosed.

Abstract: A method of applying content and a data encoding pattern 18 to a product 10 comprises: applying the content 14 to a substrate 12; modifying the reflectivity of the content 14 at a predetermined wavelength; and applying the pattern 18 to the product, wherein the method is such that the pattern can be distinguished from the content at the predetermined wavelength.