METHOD AND APPARATUS FOR PROCESSING IMAGE
First Claim
1. A method for processing an image, comprising:
- generating an image histogram of an image to be processed;
judging whether the image to be processed requires backlight compensation according to the image histogram;
if the image to be processed requires the backlight compensation, determining a first luminance boundary value A used for deciding whether to perform the backlight compensation and a second luminance boundary value C used for deciding whether to perform positive or negative backlight compensation; and
performing backlight compensation for the image to be processed according to the first luminance boundary value A and the second luminance boundary value C.
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Accused Products
Abstract
A method and an apparatus for processing images are disclosed. The method includes: generating an image histogram of an image to be processed; judging whether the image to be processed requires backlight compensation according to the image histogram; if the image to be processed requires backlight compensation, determining a first luminance boundary value A used for deciding whether to perform backlight compensation and a second luminance boundary value C used for deciding whether to perform positive or negative backlight compensation; and performing backlight compensation for the image to be processed according to the first luminance boundary value A and the second luminance boundary value C. The method is simple and universally applicable. After backlight compensation, the contrast of the image is high, and the image is free from background overexposure and image layering. The image photographed in a backlight environment is processed properly.
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Citations
20 Claims
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1. A method for processing an image, comprising:
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generating an image histogram of an image to be processed; judging whether the image to be processed requires backlight compensation according to the image histogram; if the image to be processed requires the backlight compensation, determining a first luminance boundary value A used for deciding whether to perform the backlight compensation and a second luminance boundary value C used for deciding whether to perform positive or negative backlight compensation; and performing backlight compensation for the image to be processed according to the first luminance boundary value A and the second luminance boundary value C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for processing an image, comprising:
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an image histogram generating unit, adapted to generate an image histogram of an image to be processed; a backlight compensation judging unit, adapted to judge whether the image to be processed requires backlight compensation according to the image histogram of the image to be processed; a backlight compensation parameter generating unit, adapted to generate a first luminance boundary value A and a second luminance boundary value C for the backlight compensation if the backlight compensation judging unit determines that the image to be processed requires the backlight compensation; and a backlight compensation unit, adapted to perform the backlight compensation for the image to be processed according to the first luminance boundary value A and the second luminance boundary value C generated by the backlight compensation parameter generating unit. - View Dependent Claims (18, 19, 20)
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Specification