Title:
IMAGE PROCESSING DEVICE AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/069478
Kind Code:
A1
Abstract:
A brightness information detector (3) detects maximum and minimum gray scale
information values of a brightness signal obtained from one frame image signal
(Db) and outputs the same as a brightness information value (Yi). A color information
detector (20) detects maximum and minimum gray scale information values of three-kind
color signals R, G and B obtained from one frame image signal (Db) and outputs the
same as a color information value (Ci). A correction controller (45) calculates
a parameter (Pa) on the basis of the brightness information value (Yi) and the
color information value (Ci), a gray-scale corrector (5) carries out treatment
of a positive color on the image signal (Db) as well as that of a negative color in
a point symmetry with the positive color with respect to the origin on the basis
of the parameter (Pa). A display section (6) displays an image on the basis of an
image signal (Dc) resulted from the gray-scale correction of the image signal
(Db). A color contrast can be improved while a deterioration of an image signal
including a negative color signal is suppressed.
Inventors:
YOSHII HIDEKI (JP)
SOMEYA JUN (JP)
KAGAWA SHUICHI (JP)
SUGIURA HIROAKI (JP)
SOMEYA JUN (JP)
KAGAWA SHUICHI (JP)
SUGIURA HIROAKI (JP)
Application Number:
PCT/JP2006/324072
Publication Date:
June 21, 2007
Filing Date:
December 01, 2006
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
YOSHII HIDEKI (JP)
SOMEYA JUN (JP)
KAGAWA SHUICHI (JP)
SUGIURA HIROAKI (JP)
YOSHII HIDEKI (JP)
SOMEYA JUN (JP)
KAGAWA SHUICHI (JP)
SUGIURA HIROAKI (JP)
International Classes:
G09G5/02; G06T5/00; G09G3/20; G09G3/34; G09G3/36; G09G5/00; G09G5/36; H04N1/407; H04N1/46; H04N1/60; H04N9/68
Domestic Patent References:
| WO2006103835A1 | 2006-10-05 |
Foreign References:
| JP2001027890A | 2001-01-30 | |||
| JPS63177679A | 1988-07-21 | |||
| JPH11331622A | 1999-11-30 | |||
| JP2003209706A | 2003-07-25 | |||
| JP2006148605A | 2006-06-08 | |||
| JP2005295511A | 2005-10-20 | |||
| JP2006033575A | 2006-02-02 |
Attorney, Agent or Firm:
MAEDA, Minoru et al. (Koda Bldg. 4F 16-2, Yoyogi 2-chom, Shibuya-ku Tokyo 53, JP)
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