Image processing apparatus
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United States of America Patent
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Mar 6, 2012
Grant Date -
Jan 18, 2007
app pub date -
Dec 16, 2005
filing date -
Jul 15, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An image processing apparatus includes a QV converter that converts an electric charge accumulated in an effective pixel portion into an analog video signal and also converts an electric charge of a shaded pixel portion into an analog shaded signal, a signal processing section that processes output signals of the QV converter, a black level setting section that sets a black level from a black level target value, an A/D conversion section that A/D converts an analog output signal of the signal processing section after correction thereof by the black level, a CPU that processes a digital output signal D from the A/D conversion section, a noise determination section that determines a noise level from the digital output signal, a brightness measuring section that measures brightness information of a predetermined region, and a target value setting section that sets the black level target value based on the noise level and the brightness information.
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