Hardware modeling of LED relative brightness
First Claim
1. An article of manufacture comprising a program storage medium having computer readable program code means embodied therein for causing the adjustment of an exposure, the computer readable program code means in said article of manufacture comprising;
- computer readable program code means for causing a computer to read an indication of the brightness of an illumination source from a model;
computer readable program code means for causing said computer to adjust said exposure based on said indication of said brightness of said illumination source.
2 Assignments
0 Petitions
Accused Products
Abstract
Via simple electronic circuitry, an analog voltage that tracks the LED light output is produced. This analog voltage is read by an A/D converter to ascertain an approximate relative light output of the LED so that light output compensation can be quickly calculated. A resistor-capacitor circuit is used to approximate the behavior of the LED light output. The output voltage from this circuit is sampled and used along with a sensed ambient temperature to adjust the exposure time of an image capture system.
18 Citations
14 Claims
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1. An article of manufacture comprising a program storage medium having computer readable program code means embodied therein for causing the adjustment of an exposure, the computer readable program code means in said article of manufacture comprising;
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computer readable program code means for causing a computer to read an indication of the brightness of an illumination source from a model; computer readable program code means for causing said computer to adjust said exposure based on said indication of said brightness of said illumination source. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An image capture device, comprising:
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illumination means; modeling means, said modeling means producing a modeling means output that is indicative of the relative brightness of said illumination means; and exposure adjustment means for changing an exposure to compensate for changes in said relative brightness of said illumination means as indicated by said modeling means output. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification