Method for adjusting position and size of projection picture with full degree of freedom

Abstract

The invention relates to a method for adjusting the position and the size of a projection picture with the full degree of freedom. The method comprises the steps of projecting a standard testing image through digital light process (DLP); aiming at a projection screen and shooting the projection picture through CCD; acquiring the adjustment amount of a zoom adjustment to conduct zoom adjustment by processing of shot data by a computer; and sequentially using rotating adjustment, vertical inclination adjustment, horizontal displacement adjustment and vertical displacement adjustment as an adjustment object, loop executing of the following steps and completing the adjustment to the projection picture. The CCD is directed at the projection screen to shoot the projection picture, analyzing and processing are conducted on the shot data by using an approximation algorithm through the computer to obtain the adjustment amount and the adjustment direction corresponding to the adjustment object, and the computer automatically controls a corresponding knob to conduct adjustment. By means of the method for adjusting the position and the size of the projection picture with the full degree of freedom, the computer automatically controls the five shafts of six shafts to adjust the knob, so that the relative position of a light machine and the projection screen can be adjusted accurately, the projection image can be fully displayed on the screen inerrably, manual operation is needless, and time and labor can be saved.

Description

technical field [0001] The invention relates to the field of optical projection systems, in particular to a method for adjusting the position and size of a projection screen with full degrees of freedom. Background technique [0002] Digital Lighting Processing (DLP) is a device based on micro-electromechanical systems. It is a device composed of a high-speed digital light reflection switch array using semiconductor manufacturing technology. It uses binary pulse width modulation technology to precisely control light. With the combination of image processing, memory, light source and optical system, the image is projected to the large screen, which can produce high brightness, high contrast and seamless color images. However, in order to ensure that the projected image can be correctly displayed on the screen without distortion and full screen, it is necessary to accurately adjust the relative position of the optical machine and the large screen. [0003] At present, the adj...

AI Technical Summary

Problems solved by technology

[0004] At present, both of these methods require testers to adjust the six-axis by observing the projected screen on the screen. Generally, it takes a long time to adjust to the expected effect, which is time-consuming and laborious.

And due to visual differences, different testers will call out different results

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