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Multiple wavelet analysis of amplitude/frequency modulated images

Metikas, G; Olhede, SC; (2005) Multiple wavelet analysis of amplitude/frequency modulated images. In: 2005 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT), Vols 1 and 2. (pp. 284 - 288). IEEE

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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.

Type: Proceedings paper
Title: Multiple wavelet analysis of amplitude/frequency modulated images
Event: 5th IEEE International Symposium on Signal Processing and Information Technology
Location: Athens, GREECE
Dates: 2005-12-18 - 2005-12-21
ISBN: 0-7803-9313-9
Keywords: wavelets, texture, local image frequencies, SIGNALS
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Statistical Science
URI: http://discovery.ucl.ac.uk/id/eprint/60043
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