IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD, AND IMAGE PICKUP DEVICE AND IMAGE PICKUP METHOD

WIPO Patent Application WO/2008/032517

A1

An image processing device (5), which corrects every pixel of an input image signal (Xin) and outputs a corrected image signal (Xout), is provided with a filter means (2) for acquiring and outputting brightness distributions of a pixel subjected to the correction and its surrounding pixels, a correction gain calculating means (3) for acquiring a correction gain of the pixel subjected to the correction from the output of the filter means (2), an arithmetic operation means (4) for carrying out an arithmetic operation for every pixel of the input image signal by using the correction gain acquired by the correction gain calculating means (3). This simple structure can improve properly a dynamic range of the input image.

ISHIDA KOZO (JP)
KUNO TETSUYA (JP)
ITOW TAKASHI (JP)
MORIYA SHOUTAROU (JP)

PCT/JP2007/065846

March 20, 2008

August 14, 2007

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MITSUBISHI ELECTRIC CORP (JP)
ISHIDA KOZO (JP)
KUNO TETSUYA (JP)
ITOW TAKASHI (JP)
MORIYA SHOUTAROU (JP)

H04N5/243; G06T5/00; G06T5/20; H04N1/407; H04N1/46; H04N5/20; H04N5/238; H04N5/57

WO2006137216A1

2006-12-28

JP2003046807A	2003-02-14
JPH10336515A	1998-12-18
JP2000184272A	2000-06-30
JP2002033956A	2002-01-31
JP2004363726A	2004-12-24
JP2006121386A	2006-05-11
JP2004343177A	2004-12-02
JPH09200605A	1997-07-31
JP2002027285A	2002-01-25
JP2005038119A	2005-02-10

Z. RAHMAN ET AL.: "A Multiscale Retinex for Color Rendition and Dynamic Range Compression", XIX PROC. SPIE, vol. 2847, November 1996 (1996-11-01), pages 183 - 191, XP008014214, DOI: doi:10.1117/12.258224
See also references of EP 2061233A4

MAEDA, Minoru et al. (Koda Bldg. 4F16-2, Yoyogi 2-chom, Shibuya-ku Tokyo 53, JP)

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