Electronic endoscope apparatus

Details Electronic endoscope apparatus Electronic endoscope apparatus

2006-04-18

2006-04-18

Leubecker, John P. (Department: 3739)

Surgery

Endoscope

Having imaging and illumination means

C600S160000

Reexamination Certificate

active

07029437

ABSTRACT:
An electronic endoscope apparatus has a light source, a pixel luminance detector, a division setter, an average block luminance calculator, a peak-luminance determiner, a representative luminance calculator, and a brightness adjuster. The division setter divides the subject image into a plurality of blocks composed of given pixels. The average block luminance calculator calculates a plurality of average block-luminance-levels. The peak-luminance determiner compares the average block-luminance-levels with each other in order to determine a substantially maximum average block-luminance-level from the plurality of average block-luminance-levels as a peak luminance level. The representative luminance calculator calculates a representative luminance level indicating a brightness of the subject image. The brightness adjuster adjusts the brightness of the subject image in accordance with the representative luminance level.

REFERENCES:
patent: 5475420 (1995-12-01), Buchin
patent: 6080104 (2000-06-01), Ozawa et al.
patent: 6475141 (2002-11-01), Abe
patent: 6765619 (2004-07-01), Deng et al.
patent: 6914630 (2005-07-01), Nakamura
U.S. Appl. No. 10/663,788 to Kobayashi et al., filed Sep. 17, 2003, and entitled “Diagnosis Supporting Device”.
U.S. Appl. No. 10/260,335 to Iida et al., filed Oct. 1, 2002 and entitled “Electronic Endoscope With Light-Amount Adjustment Apparatus”.

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