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A method, device and terminal for improving the contrast of dark areas of an image

A contrast, dark area technology, applied in image enhancement, image data processing, instruments, etc., can solve the problem of whitening in dark areas of the image, and achieve the effect of increasing contrast and contrast.

Active Publication Date: 2022-02-11
上海顺久电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a method, device and terminal for improving the contrast of the dark area of ​​an image, so as to solve the problem that the dark area of ​​the image turns white when the display displays an image with poor contrast in the dark area

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  • A method, device and terminal for improving the contrast of dark areas of an image
  • A method, device and terminal for improving the contrast of dark areas of an image
  • A method, device and terminal for improving the contrast of dark areas of an image

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Embodiment Construction

[0027] During the image capturing process, due to lighting and other reasons, the captured video image or picture image may have poor contrast in dark areas. Before an image with poor contrast in dark areas is displayed on the monitor, the processor usually adjusts the contrast of the image to be displayed. However, due to the poor contrast of the dark area of ​​the image, the image after the processor has adjusted the contrast still has the problem of whitening of the dark area, that is, the contrast of the entire dark area is reduced, which affects the display effect of the entire image.

[0028] In view of the above problems, embodiments of the present application provide a method, device, and terminal for improving the contrast of dark areas of an image. The core idea of ​​the method for improving the contrast of the dark area of ​​the image provided by the embodiment of the present application is: after obtaining the original gray value of each pixel in the current image,...

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Abstract

The invention provides a method, device and terminal for improving the contrast of dark areas of an image. This method determines the average gray value or minimum gray value of all pixels according to the original gray value of each pixel in the current image. Multiple input grayscale division values ​​and multiple output grayscale division values ​​can be determined according to multiple preset input factors, multiple preset output factors, and the average or minimum grayscale value. The original gray value of each pixel in the dark area can be corrected by the input gray scale division value and the output gray scale division value, so as to determine the output gray scale value of each pixel in the dark area. Since the correction degree of the gray value of each pixel in the dark area is different, the gap between the output gray values ​​of the pixels in the dark area increases, that is, the contrast between the pixels in the dark area increases, and the whole The contrast of the current image is also improved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a method, device and terminal for improving the contrast of dark areas of an image. Background technique [0002] Image contrast refers to the measurement of different brightness levels between the brightest white and the darkest black in the light and dark areas of the image, which can reflect the size of the image grayscale contrast. The greater the gray contrast of the image, the greater the contrast of the image, the clearer the image and the brighter the color. Therefore, the image contrast has a greater impact on the clarity, detail performance and gray level of the image display. , especially for dynamic video images with fast light and dark transitions. [0003] In order to improve the display effect of an image, it is usually necessary to increase the contrast of the image. At present, methods for improving image contrast mainly include increasing the br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T5/90
Inventor 刘国卿田广
Owner 上海顺久电子科技有限公司