Projector distortion correction method and device and projector

Abstract

The invention discloses a projector distortion correction method and device and a projector. The method comprises the following steps: projecting a standard grid image on a grating pixel surface on aprojection surface by using an optical-mechanical lens, and shooting the projection surface by using a camera to obtain a projection point cloud image of grid points on the projection surface; according to a pre-constructed three-dimensional projection model, obtaining three-dimensional coordinates of the grid points on the projection surface based on an optical-mechanical lens coordinate system;obtaining a reference projection plane by using the three-dimensional coordinates of the grid points on the projection surface, constructing a world coordinate system by using the reference projectionplane and the attitude information of the projector obtained by the inertial measurement unit, and obtaining a conversion relationship between the world coordinate system and an optical-mechanical lens coordinate system; obtaining a distortionless projection target area on the grating pixel surface according to the conversion relation; and obtaining a mapping relationship between the grating pixel surface and the target area, and performing texture mapping on the to-be-projected content by utilizing the mapping relationship. According to the invention, trapezoidal distortion caused by an unsatisfactory projection angle can be eliminated.

Description

technical field [0001] The invention relates to a projector distortion correction method, device and projector. Background technique [0002] With the maturity of short-focus optical machine technology and the sharp drop in cost, the application of smart projectors in homes is increasing. In order to meet the requirements of home users for high-quality viewing experience, the image quality of smart projectors has been rapidly improved in terms of resolution, brightness and color. Under normal circumstances, if the projection direction of the projector is not at right angles to the projection screen, the projected image will have trapezoidal distortion. In practical applications, the user will adjust the projection angle in the vertical direction of the projector to produce projection images of different heights and sizes, which will cause vertical trapezoidal distortion. In addition to vertical keystone correction, the projector often encounters Keystone distortion occurs ...

AI Technical Summary

Problems solved by technology

[0004] However, the existing solutions cannot perfectly solve the distortion caused by the axial rotation deviation, which makes the projector poorly adaptable to the projection environment and affects the user's viewing experience

In addition, most of the current trapezoidal correction techniques require users to complete the correction process through visual correction and manual adjustment of correction parameters, and the degree of automation is generally not high.

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