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Occurrence Condition of False Contour in JPEG and Its Improvement

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The performance of recent digital cameras, printers, scanners and other input-output devices are wonderful. Therefore, the quality of a digital image is improved remarkably. As a result, the quality of the compressed image has come to be focused on. False contours may appear in the decoded image when a digital image is compressed with JPEG (Joint Photographic Expert Group) compression algorithm. There were many cases we are not able to perceive false contours when we used the input-output devices with certain noise level. We reported that false contours appear by the accuracy improvement of the output devices with the research in the IS&T's NIP158.

In this research, we studied the condition that false contours are seemed to the eyesore from both side of compressibility and the noise level of printer. We tried some experiments with various kinds of printer.
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Document Type: Research Article

Publication date: 2000-01-01

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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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