Title :
Sharpening enhancement of digitized mammograms with complex symmetric Daubechies wavelets
Author :
Gagnon, L. ; Lina, J.M. ; Goulard, B.
Author_Institution :
Dept. de Phys., Montreal Univ., Que., Canada
Abstract :
Some complex symmetric Daubechies wavelets provide a natural way to calculate zero-crossings because of a hidden “Laplacian operator” in the imaginary part of the scaling function. We propose a simple multiscale sharpening enhancement algorithm based on this property. The algorithm is tested on low-contrast digitized mammograms
Keywords :
Laplace transforms; diagnostic radiography; image enhancement; image resolution; medical image processing; wavelet transforms; breast cancers; complex symmetric Daubechies wavelets; digitized mammograms; hidden Laplacian operator; imaginary part; low-contrast digitized mammograms; scaling function; sharpening enhancement; simple multiscale sharpening enhancement algorithm; zero-crossings; Attenuation; Breast cancer; Cancer detection; Frequency; Image processing; Laplace equations; Signal resolution; Testing; Wavelet coefficients; X-ray imaging;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.575241
