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Backlight value extraction method and device

An extraction method and technology of an extraction device, which are applied in the field of backlight value extraction of backlight sources, can solve problems such as complex implementation schemes, and achieve the effects of improving image quality, improving contrast, and being easy to implement.

Inactive Publication Date: 2011-07-06
HISENSE VISUAL TECH CO LTD
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  • Claims
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Problems solved by technology

However, although this technical solution has a certain degree of progress in improving image quality and reducing energy consumption, its implementation is relatively complicated.

Method used

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  • Backlight value extraction method and device
  • Backlight value extraction method and device

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Embodiment Construction

[0025] The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing:

[0026] A method for extracting a backlight value according to an embodiment of the present invention includes the following steps: first receiving image data. Then, convert the received image data from the R / G / B color space into the HSI color space to obtain the I component of the HSI color space. The purpose of color space (also called color model) is to simplify color specifications in a generally acceptable way under certain standards. In digital image processing, the most common hardware-oriented color model in practice is R / G / B color Space (red, green, blue). This model is used in color monitors and a large class of color video cameras. The YUV (analog PAL) (brightness, color difference R-Y, G-Y) or YCbCr (digital) color spaces are used in modern color televisions. The HSI color space (hue, saturation, lightness) is more in line with the way ...

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Abstract

The embodiment of the invention discloses a backlight value extraction method and device. The method comprises the following steps of: converting received image data from an R / G / B (Red / Green / Blue) color space to an HSI (Hue Saturation Intensity) color space to acquire components I of the HSI color space; recording the distribution positions of the components I, and calculating the maximum value and mean value of the components I in the positions; and weighting and averaging the maximum value and the mean vale to obtain the backlight value. Compared with the existing scheme in which the backlight value of a subarea is obtained by adopting complex column diagram statistics, the technical scheme provided by the embodiment of the invention is simpler and is easy to realize by receiving the image data, converting the received image data from the R / G / B color space to the HSI color space to acquire the components I of the HSI color space and extracting the backlight value of a subarea according to the components I.

Description

technical field [0001] The invention relates to a backlight value extraction technology of a backlight source, in particular to a method and a device for extracting backlight values ​​of LED display backlight partitions. Background technique [0002] At present, LED-backlit LCD TVs are gradually entering the mature stage of industrialization. One of the keys to the development of LED-backlit LCD TVs is the development of LED backlight control technology. The task of LED backlight control technology is to overcome or improve the inherent problems of LCD panels: such as light leakage in dark gray scales, LCD panel smearing, and how to improve image quality, color gamut, energy conservation and environmental protection, etc. Aiming at the above problems, currently there are technical solutions aimed at improving some of the above problems. For example, perform histogram statistics on all pixels or R / G / B components of a frame, find the key area of ​​gray level distribution in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 刘卫东乔明胜陈兴锋黄国鹏
Owner HISENSE VISUAL TECH CO LTD
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