COORDINATE CONVERSION METHOD, DATA COMPRESSION METHOD USING THE SAME, INFORMATION HIDING METHOD, AND DEVICE THEREOF

摘要

[PROBLEMS] To provide a technique for coordinate conversion in which the coordinate conversion of object data such as an arbitrary image has the maximum conversion efficiency. [MEANS FOR SOLVING PROBLEMS] Since a first axis is decided according to a distribution shape of object data, it is possible to perform coordinate conversion not only for an ideal function such as a convex function but also object data having a partially peculiar distribution shape without being significantly affected in the peculiar distribution shape portion.