WAVELET COEFFICIENT MAPPING FOR ENHANCEMENT OF CHEST X-RAY IMAGES

Du-Yih Tsai, Katsuyuki Kojima

Abstract

An approach to image enhancement of digital chest radiographs is described. The method is to employ various non-linear mapping functions to different scale levels at the transform domain. The mapping functions are used to project a set of discrete wavelet transform (DWT) coefficients to a new set of DWT coefficients. The mapped coefficients are then inverse wavelet transformed. Our preliminary results strongly suggest that the proposed method offers considerably improved enhancement capability over the fast Fourier transform method and the conventional DWT method.

Keywords

medical imaging, wavelet transform, chest x-ray images

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PWC-2003-TC13-008.pdf

DOI

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IMEKO TC

TC13 - Measurements in Biology and Medicine

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