Rotation invariant color pattern recognition by use of a three-dimensional Fourier transform.
Recently, the use of three-dimensional correlation for multichannel pattern recognition has been introduced. In this work we propose the use of circular harmonic components with this new technique to obtain invariance under target rotations. The differences between this method and the previous use of circular harmonic filters for multichannel images are discussed. Also the problem of determining the proper center is studied and, to our knowledge, a new and more understandable criterion to locate it is introduced. Some simulation results to verify the successful operation of the method are included.
Gualdrón
Oscar
O
Universidad Industrial de Santander, AA 678 Bucaramanga, Colombia.
Nicolás
Josep
J
Campos
Juan
J
Yzuel
Maria J
MJ