High speed, high resolution image processing system
Edge decomposition for the transmission of high resolution facsimile images
Use of a densitometer for adaptive control of printhead-to-media distance in ink jet printers
Color sensor array with independently controllable integration times for each color
Simplified document handler job recovery system with reduced memory duplicate scanned image detection
Color sensor array and system for scanning simple color documents
ApplicationNo. 916499 filed on 08/22/1997
US Classes:358/1.6, Specific to image source358/486Scan rate or document movement variation in accordance with data presence
ExaminersPrimary: Au, Amelia
Assistant: Cooperrider, F. E.
Attorney, Agent or Firm
Foreign Patent References
International ClassB41B 015/00
AbstractIn a digital copier in which the copies are made with a reciprocating ink-jet printhead, the original image to be copied is pre-scanned at high speed and low resolution, to identify an area in the original image having white space. If the white-space area in the original image is sufficiently large, the action of the printhead can be adapted to skip the corresponding area in the copy sheet in the printing process, thus increasing the overall throughput of the digital copier. An analogous technique can be used to identify non-halftone or non-color portions of an original image, which can be printed with fewer than a maximum number of passes of the printhead over a specific area of the copy sheet.