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

Abstract

The invention relates to the technical fields of image processing and projection focusing, and specifically discloses a focusing method, a focusing device and a readable storage medium for an ultra-short-focus projector. The present application projects the projection image to the projection surface; drives the focus motor to rotate a stroke in a stepwise manner, and obtains the first projection screen image and the second projection screen image at each step position of the focus motor; obtains the corresponding image of the first image acquisition device The position of the first focus motor, and the position of the second focus motor corresponding to the second image acquisition device; determine the focus position according to the position of the first focus motor and the position of the second focus motor; drive the focus motor to reach The focus position, the method to complete the focus. By analyzing the sharpness of the images of the projected screen areas on both sides to determine the optimal focus position on both sides, and then comprehensively determine the final focus position, the computational complexity is greatly reduced, and at the same time, the introduction of sharpness data in the original image due to the error of the splicing method can be avoided. error problem.

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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