METHOD FOR ACQUIRING MAXIMUM RECTANGULAR PROJECTION IMAGE DURING PROJECTION UNIT KEYSTONE CORRECTION

摘要

The present invention belongs to the technical field of projection, and discloses a method for acquiring a maximum rectangular projection image during projection unit keystone correction. The method comprises: selecting a reference vertex of a current projection image according to a position posture and a deflection direction of a projection unit; setting coordinates of the reference vertex as coordinates of a reference vertex of the maximum rectangular projection image; establishing a relational expression containing a maximum rectangle side according to a positional relationship between the maximum rectangular projection image and the current projection image, and solving the maximum rectangle; and obtaining the coordinates of each vertex of the maximum rectangular projection image according to the coordinates of the reference vertex and the maximum rectangle side. By means of the method, the maximum rectangular projection image can be obtained so as to ensure the optimal film-watching effect for a user.