Solid-state image-sensing apparatus with temperature correction and method of calibrating the same
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United States of America Patent
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Oct 7, 2003
Grant Date -
Jul 4, 2002
app pub date -
Apr 18, 2000
filing date -
Apr 22, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In an image-sensing apparatus, the shading data acquired when uniform light is shone on a sensor 1 is stored in a memory 3, and the temperature T0 of the sensor 1 detected by a temperature detector 6 at that time is stored in a calculation circuit 7. During image shooting, the temperature T of the sensor 1 is detected by the temperature detector 6 so as to calculate the temperature ratio T/T0 of this temperature to the temperature T0 stored in the calculation circuit 7. Then, a temperature compensation circuit 41 multiplies the shading data for the pixels that output image data by T/T0. A correction calculation circuit (COR) 4 subtracts the shading data thus multiplied by T/T0 from the image data, and thereby the unevenness in sensitivity among the pixels of the sensor 1 is corrected.
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