Determining a final exposure setting automatically for a solid state camera without a separate light metering circuit
First Claim
1. (Twice Amended) A method for generating an exposure setting, comprising:
- a) selecting one of a plurality of predetermined exposure settings as a current exposure setting for a solid state camera having a camera imager;
b) generating a captured scene by the camera imager using the current exposure setting;
c) selecting according to an automated search methodology another one of the exposure settings to be the current setting in response to the captured scene being underexposed or overexposed; and
d) repeating b) and c) until the captured scene is neither underexposed or overexposed, wherein the search methodology performs a coarse granularity search so long as the captured scene is either grossly overexposed or grossly underexposed, and then changes to a fine granularity search if the captured scene is still overexposed or underexposed but not grossly so.
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Abstract
An embodiment of the invention is a method of generating a final exposure setting, including, (a) selecting one of a number of predetermined exposure settings as a current exposure setting for a solid state camera having a camera imager, (b) generating a captured scene by the camera imager using the current exposure setting, (c) selecting according to an automated search methodology another one of the exposure settings to be the current setting in response to the captured scene being underexposed or overexposed, and, (d) repeating (b) and (c) until the captured scene is neither underexposed or overexposed.
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Citations
8 Claims
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1. (Twice Amended) A method for generating an exposure setting, comprising:
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a) selecting one of a plurality of predetermined exposure settings as a current exposure setting for a solid state camera having a camera imager;
b) generating a captured scene by the camera imager using the current exposure setting;
c) selecting according to an automated search methodology another one of the exposure settings to be the current setting in response to the captured scene being underexposed or overexposed; and
d) repeating b) and c) until the captured scene is neither underexposed or overexposed, wherein the search methodology performs a coarse granularity search so long as the captured scene is either grossly overexposed or grossly underexposed, and then changes to a fine granularity search if the captured scene is still overexposed or underexposed but not grossly so. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification