Method and device for adjusting image contrast

An image contrast and image technology, applied in the field of image processing, can solve the problem of low image contrast, achieve the effect of expanding the brightness range, improving image contrast, and improving image display effect

Active Publication Date: 2022-05-13
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for adjusting image contrast to solve the technical problem of low image contrast in the prior art

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  • Method and device for adjusting image contrast
  • Method and device for adjusting image contrast
  • Method and device for adjusting image contrast

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] In the embodiment of the present invention, the method for adjusting the image contrast can be applied to the application scenario of adjusting the static image, for example, adjusting the photos taken by the terminal or downloaded pictures, etc.; it can also be applied to the application of adjusting the dynamic image In a scenario, for example, video images are adjusted during a terminal playing a video, wherein the terminal may be...

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Abstract

The invention discloses a method and a device for adjusting image contrast. The method includes: after acquiring the brightness value of each pixel in the image area of ​​the image to be adjusted, determining the number of dark pixels in the image area according to the brightness value of each pixel, if the dark pixel is determined to be If the number of pixels is greater than the first threshold and less than or equal to the second threshold, the brightness value of the dark pixel is reduced. The present invention reduces the brightness value of dark pixels by judging the number of dark pixels when the number of dark pixels is greater than the first threshold and less than or equal to the second threshold, thereby expanding the overall brightness range of the image and effectively improving the overall brightness of the image. The transparency of the image can be enhanced to enhance the light and dark levels of the image, thereby improving the contrast of the image and achieving the purpose of improving the image display effect.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for adjusting image contrast. Background technique [0002] With the popularization of electronic devices, people's requirements for the image quality displayed by electronic devices are constantly improving, and image contrast has become an important indicator of the performance of electronic display devices. 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 an image. The larger the difference range, the greater the contrast, and the smaller the difference range, the smaller the contrast. The higher the image contrast, the richer the color levels it can display. [0003] Due to the difference in shooting or background processing, when the image is displayed, it is easy to be dark or bright, the contrast is insufficient, and the visual effect is not...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T5/007
Inventor 宋尚云刁玉洁沈海杰
Owner HISENSE VISUAL TECH CO LTD
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