Title :
Multiple wavelet analysis of amplitude/frequency modulated images
Author :
Metikas, Georgios ; Olhede, Sofia C.
Author_Institution :
Dept. of Math., Imperial Coll. London
Abstract :
We consider characterisation and analysis of images with dominant local frequencies: this class contains two-dimensional signals written as sums of amplitude and frequency modulated components. We introduce the usage of the multiple vector-valued continuous Morse wavelets for analysis of such signals. We calculate the continuous wavelet transform and the associated scalogram of an image to extract its local amplitude, frequency and dominant orientation. For images contaminated by additive noise, we estimate the local features of the image using several orthogonal mother wavelet functions with optimal localisation: this allows for the construction of estimators of local image features with reduced variability and bias
Keywords :
amplitude modulation; feature extraction; frequency modulation; image processing; wavelet transforms; additive noise; amplitude modulated images; continuous Morse wavelets; continuous wavelet transform; frequency modulated images; multiple wavelet analysis; Amplitude modulation; Continuous wavelet transforms; Educational institutions; Filters; Frequency modulation; Image analysis; Mathematics; Signal analysis; Telephony; Wavelet analysis;
Conference_Titel :
Signal Processing and Information Technology, 2005. Proceedings of the Fifth IEEE International Symposium on
Conference_Location :
Athens
Print_ISBN :
0-7803-9313-9
DOI :
10.1109/ISSPIT.2005.1577110