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US 2007/0182845 A1Published application
Auto exposure for digital imagers
AssigneeMicron Technology, Inc.
InventorKevin Hunter
Life of this patent
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Abstract
An apparatus and method for performing automatic exposure control based on current measured luminance of an image and dynamic/modifiable target luminance levels. Exposure adjustments and/or adjustments to the dynamic/modifiable target luminance windows are based on the measured luminance and threshold settings to improve image quality while avoiding oscillations and other problems typically associated with automatic exposure.
Claims32
A method of performing automatic exposure control for an imager, said method comprising the steps of:
- obtaining current luminance of an image;
- comparing the current luminance to a dynamic target luminance level;
- and
- adjusting one of an image exposure setting and the target luminance level based on a result of the comparison.
1 more element
An imaging device comprising:
- an array of pixels for capturing an image;
- image processing circuitry for obtaining current luminance of the image;
- and
- an automatic exposure control block connected to said image processing circuit, said automatic exposure control block compares the current luminance to a dynamic target luminance level and adjusts one of an image exposure setting and the target luminance level based on a result of the comparison.
1 more element
A system comprising:
- a processor;
- and
- and an imaging device coupled to said processor, said imaging device comprising:
- an array of pixels for capturing an image,
- image processing circuitry for obtaining current luminance of the image, and
- an automatic exposure control block connected to said image processing circuit, said automatic exposure control block compares the current luminance to a dynamic target luminance level and adjusts one of an image exposure setting and the target luminance level based on a result of the comparison.
3 more elements
Dependencies are inferred from the claim text.