Parameter adjusting method and device of camera for correcting LED (Light Emitting Diode) display screen

Abstract

The invention relates to a parameter adjusting method and device of a camera for correcting an LED (Light Emitting Diode) display screen. The method comprises the following steps of: (a) controlling a region to be measured of the LED display screen to display an appointed picture; (b) controlling the camera to shoot the region to be measured to obtain an image of the appointed picture; (c) analyzing the image of the appointed picture to obtain an image gray value of an LED pixel point in the image and utilizing a distribution condition of the obtained image gray value to judge whether an exposure quantity of the camera meets the requirements or not; and (d) when judging that the exposure quantity of the camera does not meet the requirements, calculating a parameter adjusting target value of the camera according to the distribution condition of the obtained image gray value and controlling a camera adjusting parameter to the parameter adjusting target value to realize the adjustment of the exposure quantity of the camera. According to the parameter adjusting method and device disclosed by the invention, the adjustment of the exposure quantity of the camera can be automatically finished and the disadvantages of operation convenience and measurement accuracy in an LED display screen correction process of the prior art are effectively overcome.

Description

technical field [0001] The invention relates to the technical field of LED display calibration, in particular to a method and device for adjusting the exposure of a camera for LED display calibration. Background technique [0002] As a new type of display technology, LED display has gradually been accepted by the market due to its advantages of energy saving, environmental protection, and high brightness, and has been widely used in urban media, urban traffic electronic signage and other fields. However, the LED display screen is composed of pixel arrays, and each pixel is composed of red, green, and blue primary color LEDs. Due to the inherent characteristics of LEDs, the three primary color LEDs that make up the LED display screen will have brightness characteristics, chromaticity characteristics, and attenuation. difference in characteristics. Therefore, the point-by-point correction technology of LED display is developed to improve the brightness, chromaticity uniformit...

AI Technical Summary

Problems solved by technology

This process requires the staff to have a certain basis of calibration experience, and it is still possible for the staff to observe whether the imaging quality meets the requirements, and the exposure may be too large or too small; moreover, due to the staff's experience has certain limitations , when using different cameras and performing display calibration at different distances, etc., it may take multiple attempts to determine the camera parameters, which will inevitably reduce efficiency, that is, the existing methods have shortcomings in terms of operational convenience and measurement accuracy. insufficient

Images