Projection correction method based on structured light and system thereof

Abstract

The invention provides a projection correction method and system based on structured light, and the method comprises the steps: enabling a structured light projection camera to project the structuredlight to a front region, and obtaining pixel data information of a projection region and a to-be-corrected image region in the front region; obtaining position coordinate information of a projection area and coordinate information of key points in a to-be-corrected image according to the pixel data information; according to the position coordinate information of the projection area and the key point coordinate information of the image to be corrected, establishing a corresponding relation between the plane of the image to be corrected and the plane where the projection area is located; and carrying out perspective transformation on the to-be-corrected image according to the corresponding relationship to obtain a corrected projection image. According to the projection correction method andsystem provided by the invention, a non-contact image correction scheme is provided, correction can be completed only by photographing the corrected image through the camera, and thus the problem of image correction can be solved more flexibly and efficiently.

Description

technical field [0001] The present invention relates to the field of projection technology, in particular to a projection correction method and system based on structured light. Background technique [0002] A projector is a device that projects an enlarged image on a screen. It is now widely used in conference presentations or video playback. However, when projecting images, the projectors currently used often do not coincide perfectly with the screen area, but tilt into a trapezoid. Keystone correction is an older problem. The traditional solution is to use manually operated hardware knobs or buttons. [0003] In recent years, there have been some hardware-based automatic correction schemes, some based on optical sensors; some require direction sensors and distance sensors, and some require angle sensors. In fact, the above-mentioned projection schemes require higher hardware costs or comparison of calibration methods. It is complicated and cannot meet the needs of the ...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide users with a projection correction method and system based on structured light, which overcomes the high hardware requirements and complicated correction steps of the projection correction scheme in the prior art Defects

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