Image brightness adjustment method and system, and computer readable storage medium

Abstract

The invention discloses an image brightness adjustment method and system, and a computer readable storage medium. The method comprises the following steps: after an image signal to be displayed is received, performing noise reduction processing on the image signal to be displayed, and obtaining an image signal to be displayed after noise reduction; comparing the image signal to be displayed beforenoise reduction with the image signal to be displayed after noise reduction, and obtaining a signal-to-noise ratio; calculating a compensation intensity coefficient according to the signal-to-noise ratio, and determining an attribute value of each region of an image to be displayed; and adjusting the brightness of the image to be displayed according to the compensation intensity coefficient and the attribute value. According to the image brightness adjustment method provided by the invention, the intensity of data compensation is adaptively adjusted through the signal-to-noise ratio in the Local Dimming data compensation process, data compensation is reduced for image pictures with large noise, and the increase of the image dark noise is avoided; and larger data compensation is adopted for the image pictures with small noise, so that the detail visibility of the image dark part is good, so that the quality of the image displayed by a television is improved.

Description

technical field [0001] The present invention relates to the technical field of image processing, and in particular, to an image brightness adjustment method, system and computer-readable storage medium. Background technique [0002] As users have higher and higher requirements for picture quality, many TVs use multi-partition backlighting to display images. The Local Dimming backlight module uses a backlight composed of hundreds of LEDs (Light Emitting Diodes) to replace the CCFL (Cold Cathode Fluorescent Lamp) backlights. Adjustment, the LED corresponding to the bright part of the displayed image can be adjusted to the maximum brightness, while the LED corresponding to the dark part of the displayed image can be correspondingly reduced in brightness or even turned off to achieve the best contrast. However, the traditional Local Dimming technology will reduce the brightness of the backlight when the picture is dark, resulting in a darker subjective picture, which makes the ...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an image brightness adjustment method, system, and computer-readable storage medium, aiming to solve the technical problem that the noise in the dark part of the image becomes larger due to improper compensation of Local Dimming data in the existing multi-zone backlight control

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