Projection Geometric Correction for Screen Pattern

In the projection system, the projected image should be able to meet the normal visual needs of observer, so that the viewer can get the correct projection. When the projection screen surface is the irregular free surface, the projection geometric correction of the projected image becomes the research focus. For the question of irregular projection screen surface, this paper presents effective geometric correction method. The geometric correction method based on the geometry of irregular projection screen surface and ideal location of viewport to calculate the points' three-dimensional coordinate values. In this paper, the projection geometric correction method is widely applicable to various projection screen surface environments.