Encryption of Digital Image Using Polyharmonic Function
Tadashi Kobayashi, Takafumi KAWAGUCHI, Narihei Kawashima, Yoshihiro OCHIAI · Keisan Rikigaku Koenkai koen ronbunshu/Keisan Rikigaku Kouenkai kouen rombunshuu · 2002
In the interpolation method using B-spline, points must be assigned in a gridiron layout. In the method using polyharmonic function, arbitrary points can be assigned instesd of a gridiron layout therefore it becomes easy to interpolate. This method requires a boundary geometry of the region and arbitrary internal points. We applied this theory to the encryption of digital image and obtained satisfactory results.