System and method for measuring/evaluating moving image quality of screen

Abstract

A system for measuring / evaluating the moving image quality of a screen comprising a rotatable mirror (2), a camera (3) for photographing the screen through the mirror (2), and a control section (6). When a fact that a measurement pattern included in a moving image displayed on the screen (5) has passed through a specified position of the screen (5) is detected based on a variation in the luminance of the screen (5), the control section (6) provides the mirror (2) with a chance to rotate at the point in time of detection and controls the mirror (2) to rotate while following up the movement of the measurement pattern after rotation of the mirror (2) is started. The mirror (2) can be provided with a chance to rotate without requiring electrical synchronization of rotation with moving image signal and the moving image quality of the screen can be measured through a simple arrangement.

Description

technical field [0001] The invention relates to a moving image quality measurement and evaluation device and method of a picture, which can measure and evaluate the moving picture quality of a picture according to the motion of a measurement pattern projected on the picture of a monitor to be evaluated. Background technique [0002] By displaying a moving image on the screen of various displays such as liquid crystal display (LCD), cathode ray tube display (CRT), plasma display (PDP), electroluminescence display (EL), etc., the motion of the screen is measured and the motion is evaluated Image Quality. One of such evaluation methods includes a method of making a camera follow the movement of a moving image like an eyeball, capturing a still image, and evaluating the sharpness of the captured still image. In particular, in the case of a display such as an LCD with a long image retention time, the sharpness of the edge of the image decreases. A method of quantifying this dec...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned moving image quality measurement and evaluation device must generate a trigger signal for triggering the rotation of the mirror based on the synchronization signal of the moving image video signal, so it is necessary to develop a signal generating circuit for generating the trigger signal.

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