Focusing method and focusing device of ultra-short-focus projector and readable storage medium

Abstract

The invention relates to the technical field of image processing and projection focusing, and particularly discloses a focusing method and a focusing device of an ultra-short-focus projector and a readable storage medium. The method comprises steps of projecting projection image to the projection surface; driving the focusing motor to rotate for one stroke in a stepping mode, and obtaining a firstprojection picture image and a second projection picture image at each step position of the focusing motor; acquiring a first focusing motor position corresponding to the first image acquisition device and a second focusing motor position corresponding to the second image acquisition device; determining a focusing position according to the first focusing motor position and the second focusing motor position; and driving a focusing motor to reach a focusing position to finish the focusing method. The optimal focusing positions on the two sides are determined by conducting definition analysis on the projection picture area images on the two sides respectively, then the final focusing position is comprehensively determined, the calculation complexity is greatly reduced, and meanwhile the problem that errors are introduced into definition data in an original image due to errors of a splicing method can be avoided.

Description

technical field [0001] The invention relates to the technical field of image processing and projection focusing, and in particular to a focusing method, a focusing device and a readable storage medium of an ultra-short-focus projector. Background technique [0002] In the ultra-short-throw projectors currently on the market, manual focus is generally used, and there is no automatic focus function. The main reasons are as follows. The method of focusing based on distance measurement requires high equipment consistency and poor applicability. Therefore, the mainstream focusing method is to analyze the image quality to focus, but it is difficult for the projector to ensure that the optical machine is completely free of virtual reality. Therefore, the focus must be focused on the full screen to ensure the effect; in addition, because the distance between the projector and the projection surface is too close, it is difficult for an ordinary single camera to capture the entire pro...

AI Technical Summary

Problems solved by technology

The main reasons are as follows. The method of focusing based on distance measurement requires high equipment consistency and poor applicability. Therefore, the mainstream focusing method is to analyze the image quality to focus, but it is difficult for the projector to ensure that the optical machine is completely free of virtual reality. Therefore, the focus must be focused on the full screen to ensure the effect; in addition, because the distance between the projector and the projection surface is too close, it is difficult for an ordinary single camera to capture the entire projection screen, and if a wide-angle camera is used, the captured image Distortion, as well as distortion of the projected picture itself, can interfere with image quality assessment

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