To provide an interactive video distortion correction method capable of interactively adjusting video distortions by using an intuitive interface by a GUI while observing projected video images.

The video images are interactively adjusted by sticking a source image as a texture to a Bejier curved surface defined by control points arranged in a grid shape, deforming the Bejier curved surface by moving the positions of the control points by the GUI and deforming the source image stuck to the curved surface.