Pixel out-of-control rate detection method based on area scan camera

Abstract

The invention provides a pixel uncontrol rate detection method based on an area-array camera, which is mainly based on an area-array camera technology to detect an uncontrol rate of LED (light-emitting diode) display. The pixel uncontrol rate detection method based on the area-array camera comprises the following steps that (1), an LED display screen is controlled to display a special frame; the area-array camera is used to acquire image information of the special frame displayed on the LED screen; and the image information is transmitted to a computer; (2), the image information is processed by an image segmentation algorithm to confirm light point positions and luminance information in the acquired displayed special frame; and (3), the quantity of uncontrol points is confirmed according to the luminance information of the light point positions in the special frame, the pixel uncontrol rate of the display screen is calculated, and an inspection report is generated. According to the pixel uncontrol rate detection method, the area-array camera is adopted to substitute eye identification, the computer is adopted to substitute manual judgment; an area array is subjected to corresponding control; the workload can be reduced largely; and the working efficiency is improved.

Description

technical field [0001] The invention relates to a method for detecting the out-of-control ratio of pixels of an LED display screen. Background technique [0002] The LED display is driven by low-voltage scanning, which has the advantages of low power consumption, long service life, low cost, high brightness, large viewing angle, long visual distance, waterproof, and various specifications. It is widely used in large-scale events such as the Shanghai World Expo and the Spring Festival Gala, meeting the needs of various application scenarios, and has a very broad development prospect. It is recognized as the most growth potential and the fastest growing LED application market. LED displays have been more and more widely used in various occasions. Among these applications, the blind spots and constant bright spots of LED displays, as one of the LED display testing standards, have become more and more important. Especially for LED display applications in major occasions, becau...

AI Technical Summary

Problems solved by technology

[0023] 1) Low efficiency: the visual method to measure the out-of-control rate is to use human eyes to look for blind spots and constant bright spots. Since there are many points on the display screen, it takes a long time to find dozens of blind spots and constant bright spots from so many points. low;

[0024] 2) The human eye cannot detect targets more accurately: especially blind spots, it is particularly difficult to find blind spots among all the bright spots;

[0025] 3) There are many influencing factors: people will have many uncertain factors such as fatigue, health, emotion, etc., which will affect the test results;

[0026] 4) Great damage to human health:

[0028] b) The human eye will immediately experience visual fatigue after a short exposure to strong light, and even short-term blindness, resulting in a decrease in recognition ability

Images