Image-sensing apparatus with brightness range adaptation functionality
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United States of America Patent
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Jun 12, 2007
Grant Date -
Oct 6, 2005
app pub date -
Jan 4, 2005
filing date -
May 10, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An image-sensing apparatus has an area sensor 1 that outputs image data by logarithmically converting the brightness of light incident thereon, a black-level detector 2 for detecting the black level BL of the image data at which the image data has the lowest signal level, a white-level detector 3 for detecting the white level WL of the image data at which the image data has the highest signal level, a calculation formula determiner 4 for determining, in accordance with the detected black and white levels BL and WL, the formula to be used to convert the signal level of the image data, and a dynamic range converter 5 for converting the signal level of the image data using the calculation formula determined by the calculation formula determiner 4.
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