Title :
Image enhancement for radiographs utilizing filtering, gray scale transformation and Sobel gradient operator
Author :
Wahler, Ronald A. ; Shih, Frank Y.
Author_Institution :
Bell Lab., Holmdel, NJ, USA
Abstract :
A model that combines the Sobel operator with prefiltering and gray-scale transformation to produce a radiograph with better contrast and detail is presented. The prefiltering utilizes the Gaussian convolution mask for high-frequency noise suppression. A gray-scale transformation technique is used to increase the slope between the radiograph image and the background. This process produces better input for the final enhancement. The final processing makes use of the Sobel gradient operator
Keywords :
diagnostic radiography; picture processing; Gaussian convolution mask; Sobel gradient operator; background; contrast; detail; filtering; gray scale transformation; high-frequency noise suppression; image enhancement; medical diagnostic imaging; prefiltering; radiographs; Convolution; Diagnostic radiography; Filtering; Gaussian noise; Histograms; Image edge detection; Information science; Low pass filters; Nonlinear filters; Radiographic image enhancement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95901
