US Patent 9495799 Image distortion correction system

An image generation system includes a vertex split count setting section that performs a vertex split count setting process that sets a vertex split count m, a vertex split processing section that performs a vertex split process on a three-dimensional object OB in an object space using the vertex split count m, a vertex position calculation section that calculates an intersection position of a projection screen SC and a straight line that connects a vertex position of the three-dimensional object OB after the vertex split process and a position of a virtual camera VC, and calculates a vertex position of a drawing object corresponding to the three-dimensional object OB on a drawing buffer based on the calculated intersection position, and a drawing section that draws the drawing object on the drawing buffer based on the vertex position of the drawing object to generate a projection image.