Method and apparatus for combining multi-exposure image data
First Claim
Patent Images
1. A multi-exposure imaging circuit, comprising:
- at least one pixel signal input for carrying a first and a second pixel output signal from a same pixel, the first pixel output signal generated in response to a first exposure time and the second pixel output signal generated in response to a second exposure time;
a transfer function circuit for applying a transfer function to the first pixel output signal resulting in a transfer signal and an inverse transfer function to the second pixel output signal resulting in an inverse transfer signal; and
summing circuitry for summing the transfer and inverse transfer signals into a combined output signal.
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Abstract
A method and apparatus of combining multiple exposure images by applying a transfer function to pixel output signals from pixels in a pixel array, the pixel output signals from each pixel including at least a first pixel output signal generated in response to a first exposure time and a second pixel output signal generated in response to a second exposure time.
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Citations
41 Claims
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1. A multi-exposure imaging circuit, comprising:
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at least one pixel signal input for carrying a first and a second pixel output signal from a same pixel, the first pixel output signal generated in response to a first exposure time and the second pixel output signal generated in response to a second exposure time; a transfer function circuit for applying a transfer function to the first pixel output signal resulting in a transfer signal and an inverse transfer function to the second pixel output signal resulting in an inverse transfer signal; and summing circuitry for summing the transfer and inverse transfer signals into a combined output signal. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9, 11)
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5. (canceled)
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10. (canceled)
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12. An imager, comprising:
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a pixel array; and a multiple exposure image circuit that applies a transfer function and an inverse transfer function to pixel output signals from pixels in the pixel array, the pixel output signals from each pixel including at least a first pixel output signal generated in response to a first exposure time and a second pixel output signal generated in response to a second exposure time. - View Dependent Claims (14, 15, 19, 20, 22, 23)
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13. (canceled)
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16-18. -18. (canceled)
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21. (canceled)
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24. A processing system, comprising:
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a processor; and an imaging device coupled to said processor, said imaging device comprising; a pixel array that outputs a first pixel output signal and a second pixel output signal for each pixel in the pixel array, the first pixel output signal arising from a first exposure time and the second pixel output signal arising from a second exposure time; and a multiple exposure image circuit for applying a transfer function to the first pixel output signal and an inverse transfer function to the second pixel output signal. - View Dependent Claims (32, 33)
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25-31. -31. (canceled)
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34. A method of combining multiple exposures of an image, the method comprising:
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receiving a first pixel signal from one or more pixels exposed to a first exposure time; receiving a second pixel signal from the one or more pixels exposed to a second exposure time; applying a transfer function to the first pixel signal; applying an inverse transfer function to the second pixel signal; and combining the transferred first pixel signal and the transferred second pixel signal. - View Dependent Claims (35, 36, 37, 39, 40)
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38. (canceled)
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41. (canceled)
Specification