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Hybrid Resolution Enhancement Technique based on LookUp Tables

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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.

Document Type: Research Article

Publication date: 2007-01-01

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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