Electronic camera capable of detecting defective pixel
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United States of America Patent
Stats
-
Jan 27, 2004
Grant Date -
N/A
app pub date -
Mar 18, 1998
filing date -
Mar 19, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Photographing for one image plane is conducted by CCD1 under the completely dark condition created by closing aperture 12 when the power supply is turned on, then image data obtained from this photographing are compared with a threshold value, and when the image data show higher luminance than the threshold value, the image data are detected to be defective pixels (white flaws) and positional information thereof is stored. Further, under the condition that the mode for detecting defective pixels is selected by mode switch 16, photographing for one image plane is conducted by CCD1 while a camera is directed to an exclusive subject, then image data obtained through this photographing are compared with a threshold value, and when the image data show lower luminance than the threshold value, the image data are detected to be defective pixels (black flaws), and positional information thereof is stored. In ordinary photographing, a mean value of peripheral pixels surrounding the image data of the defective pixel is used for replacement based on positional information of the defective pixel.
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Cited Art Landscape
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