IMAGE CONVERTING PROGRAM, IMAGE CONVERTING METHOD, AND MEDIUM CARRYING PROGRAM

摘要

The correspondence between the pixels constituting an image in a two-dimensional Cartesian coordinate system and the respective pixels constituting an image in a troidal coordinate system is found out. The image is so converted that the pixels constituting the image in a troidal coordinate system correspond the respective pixels constituting the image in a two-dimensional Cartesian coordinate system. In such a way, unlike the conventional conversion of the pixels of an image of a troidal coordinate system into the pixels of an image of a two-dimensional Cartesian coordinate system on a one-to-one basis, missing of a pixel of the image in a two-dimensional Cartesian coordinate system caused by that fact that the pixels in the central area of the image in the troidal coordinate system can be prevented. The distortion of the left and right sides of the image caused when the image in the troidal coordinate system is converted into an image of a two-dimensional Cartesian coordinate system according to the slope of the hyperbola of a hiperboloidal mirrors is eliminated.