Method and device for automatically adjusting image projected by projector

Abstract

The invention discloses a method for automatically adjusting the image projected by a projector. The method comprises the following steps: setting a recognizable imaging mark on a screen; extracting a preset front sight image through a menu; photographing images of the screen by a camera to recognize the positions of the mark and the preset front sight on the screen; determining whether the projected images of the mark and the preset front sight are superposed; calculating the relative coordinates of the preset front sight projected image and the mark; and adjusting the position of the projector. The invention also discloses a device for realizing the above adjustment method. The device comprises a projection module, the screen, the preset front sight, the camera, an image recognition processing module and a projector position adjusting module, wherein the camera is located on the projection module and is sequentially connected with the image recognition processing module and the projector position adjusting module. The method and the device can achieve full-automatic adjustment of trapeziform distortion of the images projected by the projector so as to save the fine adjustment time of users.

Description

technical field [0001] The present invention relates to a projector, in particular to a method for adjusting the projected image of the projector and a device for realizing it. Background technique [0002] At present, most of the wall display screens use projectors for projection display. [0003] A projector projects an image on a screen, and in some cases, the projector is set at a lower position and the image is projected on a screen set at a relatively higher position, which is called "oblique projection". During oblique projection, an image projected on a screen is deformed from a rectangle to a trapezoid due to an elevation angle in the oblique projection, and this deformation is called "keystone distortion". Related prior art projectors may include specific buttons and menus to correct keystone distortion. User can use this button to adjust keystone distortion manually. That is, people observe the image formed by the projector, judge its type, and select the corre...

AI Technical Summary

Problems solved by technology

[0005] Although the above existing technologies can basically realize the automatic correction of the trapezoidal deformation of the projector image, but with such a correction method, the user still has to manually fine-tune according to the imaging of the projector and the size of the elevation angle

It brings inconvenience to inexperienced users, and it is difficult to guarantee the effect of calibration, and wastes operation time

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