Contrast enhancement with wavelet transform in radiological images

Author

Vidaurrazaga, M. ; Diago, L.A. ; Cruz, A.

Author_Institution

Centro de Birenginieria, Inst. Superior Politecnico, La Habana, Cuba

Volume

3

fYear

2000

fDate

2000

Firstpage

1760

Abstract

A method based on discrete wavelet transform is proposed for contrast enhancement of radiological images. It is based on three steps: (i) image transform is done by using an orthogonal wavelet transform; (ii) noise reduction by means of an adaptive thresholding function that performs a postprocessing to the wavelet coefficients; (iii) contrast enhancement using a linear function with level decomposition dependence. Attention is given to the ability to maintain fine detail in the image and to avoid artifacts during noise reduction

Keywords

biomedical MRI; computerised tomography; diagnostic radiography; discrete wavelet transforms; feature extraction; image enhancement; image resolution; medical image processing; adaptive thresholding function; contrast enhancement; discrete wavelet transform; feature extraction; image transform; level decomposition dependence; linear function; noise reduction; nonlinear processing; orthogonal wavelet transform; postprocessing; radiological images; Band pass filters; Convolution; Discrete wavelet transforms; Frequency; Image reconstruction; Mirrors; Noise reduction; Signal design; Wavelet coefficients; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE

Conference_Location

Chicago, IL

ISSN

1094-687X

Print_ISBN

0-7803-6465-1

Type

conf

DOI

10.1109/IEMBS.2000.900425

Filename

900425