Methods and systems for image tonescale adjustment to compensate for a reduced source light power level
First Claim
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1. A method for adjusting an image for display with a reduced source light power level, said method comprising:
- a) creating an input image histogram for an input image;
b) locating a histogram feature on said input image histogram;
c) finding an input image histogram feature code value corresponding to said histogram feature;
d) determining an enhanced feature code value based on said input image histogram feature code value and a reduced source light power level;
e) establishing a tonescale correction curve fitted to said enhanced feature code value; and
f) processing at least a portion of said input image with said tonescale correction curve.
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Abstract
Embodiments of the present invention comprise systems, methods and devices for increasing the perceived brightness of an image. In some embodiments this increase compensates for a decrease in display light-source illumination.
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Citations
20 Claims
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1. A method for adjusting an image for display with a reduced source light power level, said method comprising:
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a) creating an input image histogram for an input image; b) locating a histogram feature on said input image histogram; c) finding an input image histogram feature code value corresponding to said histogram feature; d) determining an enhanced feature code value based on said input image histogram feature code value and a reduced source light power level; e) establishing a tonescale correction curve fitted to said enhanced feature code value; and f) processing at least a portion of said input image with said tonescale correction curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for adjusting an image for display with a reduced source light power level, said method comprising:
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a) creating an input image histogram for an input image; b) locating an input image histogram peak on said input image histogram; c) finding an input image histogram peak code value corresponding to said histogram peak; d) determining an enhanced peak code value for a reduced source light power level wherein a display emits a substantially similar amount of light at said reduced source light power level using said enhanced peak code value as said display emits using said input image histogram peak code value with a full power source light; and e) calculating a tonescale correction curve that intersects said enhanced peak code value. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system for adjusting an image for display with a reduced source light power level, said system comprising:
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a) a histogram generator for creating an input image histogram for an input image; b) a peak detector for locating an input image histogram peak on said input image histogram and a code value corresponding to said histogram peak; c) a processor for determining an enhanced peak code value for a reduced source light power level wherein a display emits a substantially similar amount of light at said reduced source light power level using said enhanced peak code value as said display emits using said input image histogram peak code value with a full power source light; and d) a tonescale correction calculator for calculating a tonescale correction curve that intersects said enhanced peak code value. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification