Enhancing contrast of video data while preserving sharpness
First Claim
1. A method, comprising:
- creating a first contrast enhanced depiction from a reference depiction;
selectively replacing elements of said reference depiction with elements of said enhanced depiction to form a second contrast enhanced depiction; and
displaying a depiction based on said second contrast enhanced depiction using a processor.
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Abstract
A method of enhancing the contrast of image or video data may include applying a contrast increasing transfer function to a reference image to generate an enhanced image. A transformation may be applied to the reference image to generate reference high frequency components and may also be applied to the enhanced image to generate enhanced high frequency components. For a pixel in the reference image, whether a corresponding enhanced high frequency component has a higher energy than a corresponding reference high frequency component may be determined. The method may also include replacing the pixel in the reference image with a corresponding pixel in the reference image if the corresponding enhanced high frequency component has a higher energy than the corresponding reference high frequency component.
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Citations
10 Claims
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1. A method, comprising:
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creating a first contrast enhanced depiction from a reference depiction; selectively replacing elements of said reference depiction with elements of said enhanced depiction to form a second contrast enhanced depiction; and displaying a depiction based on said second contrast enhanced depiction using a processor. - View Dependent Claims (2, 3, 4, 5)
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6. A system, comprising:
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a contrast enhancer to apply a contrast enhancing transfer function to a first image to generate a first contrast enhanced image; a memory; a frequency extractor to extract first frequency components from the first image and second frequency components from the first contrast enhanced image and to store said components in said memory; and comparison logic to access said components from memory and compare the first frequency components and the second frequency components and to selectively replace pixels in the first image with pixels from the first contrast enhanced image based on results of the comparison to form a second contrast enhanced image. - View Dependent Claims (7, 8, 9, 10)
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Specification