Title :
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
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6465-1
DOI :
10.1109/IEMBS.2000.900425
