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Volume: 15 | Article ID: art00002_2
Perception Condition of False Contour in JPEG
  DOI :  10.2352/ISSN.2169-4451.1999.15.1.art00002_2  Published OnlineJanuary 1999

When the JPEG (Joint Photographic Experts Group) compression algorithm compresses image with high compression rate, the false contour and mosquito noise that do not exist in an original image appear in a compression restoration image. It is well known that this trend is remarkable in artificial images (e.g. computer graphics) by comparison with natural images. A human being feels false contour to an eyesore. Also, false contour is influenced by the accuracy of the devices that outputs an image. False contour is conspicuous in the case that it used the high accuracy output devices, although it is not conspicuous in the case that it used the low accuracy noisy output devices.In this research, we studied it from both sides of compression rate and the accuracy of output devices about the condition that false contour becomes eyesore.

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Tsutomu Shohdohji, Ken'ichiroh Murata, Yasushi Hoshino, "Perception Condition of False Contour in JPEGin Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP15),  1999,  pp 378 - 381,

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