Hybrid resolution enhancement technique based on LookUp tables

Byong Tae Ryu, Jong Ok Lee, Choon Woo Kim, Sang Ho Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Recently, performance of electrophotographic printers has been significantly improved. Image quality and printing speed are major factors that determine performance of electrophotographic printers. Increase in the spatial resolution and multi-bit printing capability would result in the improved quality of printed images. However, when halftoning (or multi-toning) is performed by the printer driver, transmission time from computer to printer and the memory size required to store the image data will be increased. In order to reduce the size of image data transmitted from computer to printer, a LUT based method to enhance both of the spatial and bit-depth resolution is presented in this paper. The proposed LUTs are designed in advance using the training samples and stored at printer. When the haftoned image data is received from the computer, number of black pixels in 4×4 window is compared with number of black pixels in the 4 neighboring windows to select LUT. Spatial and bit-depth resolution are then simultaneously increased by applying the selected LUT. Various factors affecting performance of a LUT based resolution enhancement are analyzed.

Original languageEnglish
Title of host publicationNIP 23, 23rd International Conference on Digital Printing Technologies, Technical Program and Proceedings and Digital Fabrication 2007
Pages196-200
Number of pages5
StatePublished - 2007
Externally publishedYes
EventNIP 23, 23rd International Conference on Digital Printing Technologies, and Digital Fabrication 2007 - Anchorage, AK, United States
Duration: Sep 16 2007Sep 21 2007

Publication series

NameInternational Conference on Digital Printing Technologies

Conference

ConferenceNIP 23, 23rd International Conference on Digital Printing Technologies, and Digital Fabrication 2007
Country/TerritoryUnited States
CityAnchorage, AK
Period09/16/0709/21/07

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