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Image Resolution Enhancement Technology (IRET)


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Image Resolution Enhancement Technology (IRET) is a halftone technology for obtaining superior image quality on a laser printer by utilizing laser modulations. A hybrid scheme is used to combine a clustered dot pattern for stability and a stochastic screen (super smooth dither) for minimum halftone texture.

The top picture shows an eye rendered on a HP Color LaserJet without REt. The bottom picture shows it rendered on a HP Color LaserJet  with Image REt 1200.

an eye rendered on a hp color laser jet without REt

an eye rendered on a hp color laserjet with Image REt 1200


Q. Lin, "High resolution color laser printing", HPL Technical Report, No. HPL-94-78, August, 1994.
  » Embedded distributed systems
  » Halftoning
  » Image and video processing
  » Multimedia asset management
  » New rich media
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» Purdue University
» The University of Texas at Austin
»Imaging Systems Laboratory
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