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Enhancement of Monochrome Text Quality in Color Copies

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One aspect of copy image quality is the sharpness and color of copied text. Printing monochrome or black text as a color object will cause the text to appear too light, blurred, or having objectionable color hues. In this paper, we present a method to improve the appearance of black and monochrome text when copied on a color multi function printer (MFP), by detecting the presence of monochrome text characters in documents containing monochrome and color content. Initially, the scanned image is segmented into text, image, and background classes. This step is based on the analysis of edge, texture, and geometrical pixel-level features extracted at different scales. Once detected, text regions are analyzed for their chromatic content in order to discern whether the text is colored or merely a color scan of black text. Based on this classification, pixels belonging to black text are sharpened appropriately and printed using only black toner rather than a mixture of cyan, magenta, yellow, and black
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Document Type: Research Article

Publication date: 01 January 2009

More about this publication?
  • 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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