Title :
DCT Sign-Only Correlation with Application to Image Matching and the Relationship with Phase-Only Correlation
Author :
Ito, Izumi ; Kiya, Hitoshi
Author_Institution :
Dept. of Electr. & Inf. Eng., Tokyo Metropolitan Univ., Japan
Abstract :
A close relationship between the sign information of discrete cosine transform (DCT) coefficients and the phase term of discrete Fourier transform coefficient is explained. From this relationship, the DCT sign-only correlation is proposed and its relationship with the phase-only correlation (POC) is considered. As a result, the proposed correlation can be applied to applications based on the POC, and also provide a theoretical explanation of target image search and retrieval using the sign information of DCT.
Keywords :
discrete Fourier transforms; discrete cosine transforms; image matching; DCT sign-only correlation; discrete Fourier transform coefficient; discrete cosine transform; image matching; phase-only correlation; target image search; Discrete Fourier transforms; Discrete cosine transforms; Image coding; Image matching; Image registration; Image retrieval; Indium tin oxide; Information retrieval; Quantization; Transform coding; Correlation; Discrete cosine transforms; Image coding; Image matching; Image registration;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0727-3
DOI :
10.1109/ICASSP.2007.366138
