Title :
Dense grid framelets with symmetric lowpass and bandpass filters
Author :
Abdelnour, A. Farras
Author_Institution :
Image Anal. Art Unit, United States Patent & Trademark Office, Alexandria, VA
Abstract :
The paper presents new tight frame dyadic limit functions with dense time-frequency grid. The underlying lowpass and band-pass filters possess linear phase. The filterbank has additionally two highpass filters which are identical within one sample shift. This leads to wavelets which approximate shift-invariance. The filters in this paper are FIR and have vanishing moments.
Keywords :
FIR filters; approximation theory; channel bank filters; low-pass filters; time-frequency analysis; wavelet transforms; FIR filter; bandpass filters; dense grid framelets; dense time-frequency grid framelets; filterbank; shift-invariance approximation; symmetric lowpass filters; tight frame dyadic limit function; wavelet transform; Art; Band pass filters; Discrete wavelet transforms; Filter bank; Finite impulse response filter; Hydrogen; Image analysis; Noise reduction; Time frequency analysis; Trademarks;
Conference_Titel :
Signal Processing and Its Applications, 2007. ISSPA 2007. 9th International Symposium on
Conference_Location :
Sharjah
Print_ISBN :
978-1-4244-0778-1
Electronic_ISBN :
978-1-4244-1779-8
DOI :
10.1109/ISSPA.2007.4555520
