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µ-Law Based HDR Coding and Its Error Analysis Takao JINNO Hironori KAIDA Xinwei XUE Nicola ADAMI Masahiro OKUDA Publication IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Vol.E94-A No.3 pp.972-978 Publication Date: 2011/03/01 Online ISSN: 1745-1337 DOI: 10.1587/transfun.E94.A.972 Print ISSN: 0916-8508 Type of Manuscript: PAPER Category: Image Keyword: HDRI, coding, tone mapping model, Full Text: PDF(1.3MB)>>
Summary: In this paper, we propose a coding algorithm for High Dynamic Range Images (HDRI). Our encoder applies a tone mapping model based on scaled µ-Law encoding, followed by a conventional Low Dynamic Range Image (LDRI) encoder. The tone mapping model is designed to minimize the difference between the tone-mapped HDRI and its LDR version. By virtue of the nature of the µ-Law model, not only the quality of the HDRI but also the one of the LDRI is improved, compared with a state of the art in conventional HDRI coding methods. Furthermore the error limit caused by our encoding is theoretically analyzed. | ||||||||||
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