Projector distortion correction method, device and projector

Abstract

The invention discloses a projector distortion correction method, device and projector. The method of the present invention includes: using an optical-mechanical lens to project a standard grid image on the grating pixel surface on the projection surface, and using a camera to photograph the projection surface to obtain a projected point cloud image of the grid points on the projection surface; Model, obtain the three-dimensional coordinates of the grid points on the projection surface based on the optical-mechanical lens coordinate system; use the three-dimensional coordinates of the grid points on the projection surface to obtain the reference projection plane, and use the reference projection plane and the attitude information of the projector obtained by the inertial measurement unit to construct The world coordinate system, and obtain the conversion relationship between the world coordinate system and the optical-mechanical lens coordinate system; obtain the target area of ​​the undistorted projection on the grating pixel surface according to the conversion relationship; obtain the mapping relationship between the grating pixel surface and the target area, and use the mapping relationship Texture mapping of the content to be projected. The invention can eliminate the trapezoidal distortion caused by the unideal projection angle.

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 projection screen 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 occur...

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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