Method for regulating lighteness of filmed display screen based on image inductor

An image sensor and display screen technology, applied in the field of image processing, can solve the problems of insufficient brightness, insufficient brightness of the display screen, unevenness, etc., and achieve the effect of good homogenization effect

Inactive Publication Date: 2009-01-21
GUANGDONG VTRON TECH CO LTD
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  • Claims
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Problems solved by technology

We improve the existing technology, in order to better complete the positioning and display based on the brightness detection technology, and monitor the screens of various display devices, we need to solve the defects of insufficient or uneven brightness when shooting the

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  • Method for regulating lighteness of filmed display screen based on image inductor
  • Method for regulating lighteness of filmed display screen based on image inductor
  • Method for regulating lighteness of filmed display screen based on image inductor

Examples

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Example Embodiment

[0028] The following is a detailed description of a specific embodiment of the above-mentioned embodiment of the present invention for automatically adjusting the effect of adjusting the brightness gain of the image taken by the image sensor on the display screen.

[0029] For example, a black image captured by an image sensor on a monitor with a resolution of 1024×768, the histogram of the brightness distribution information is as follows figure 1 Shown. Under ideal conditions, the brightness value should be 1024×768 "0%", that is, all the brightness information should be distributed in "0%", but from the histogram of the brightness distribution, it can be seen that the display brightness distribution of the screen under ordinary ambient light illumination The information is not ideal, and there are some bright spots in the display device itself.

[0030] The bright spot adjustment method is as follows:

[0031] Step 1: Adjust the brightness value of pixels with a brightness lev...

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Abstract

The invention provides a brightness adjusting method which is based on photographing the display screen by an image sensor; the method comprising the following steps that (1) the screen of a display equipment displays all-black image under normal lighting situation and an image sensor is used for photographing the all-black image for adjusting bright spot deflection; (2) the brightness value of pixels in the all-black image which is more than 0% is adjusted lower and the position coordinates of all the bright spots and the plus adjusting value of every pixel bright spot are recorded; (3) according to the position coordinates of the bright spots and the plus adjusting values acquired from the step (2), the brightness of the display screen images which are photographed by every image sensor is automatically homogenized. The method of the invention has comparatively homogenization effect on the display screen image brightness; in particular, with the invention, the image display quality could be improved and the positioning precision of the screen positioning system with the brightness detection technique could be promoted.

Description

【Technical field】 [0001] The invention belongs to the technical field of image processing, and relates to an automatic homogenization technology of brightness gain based on an image sensor shooting a display screen image, in particular to a method for uniformly adjusting the screen brightness of a large-screen splicing wall shot by an image sensor. 【Background technique】 [0002] With the wide application and continuous development of CCD / CMOS image sensor technology and digital image processing technology, in the field of high-end display and control, such as large-scale information management and control systems, it is necessary to combine display technology with various technologies to form a perfect function, A technologically advanced system. In particular, the application of monitoring and positioning systems using camera acquisition technology is becoming more and more extensive. However, due to the optical imaging characteristics of the CCD / CMOS image sensor itself,...

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Application Information

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IPC IPC(8): H04N17/00G09G5/10
Inventor 杨月
Owner GUANGDONG VTRON TECH CO LTD
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