Title :
Nonlinear Unsharp Masking for the enhancement of document images
Author :
Chiandussi, Stefano ; Ramponi, Giovanni
Author_Institution :
D.E.E.I, University of Trieste via A. Valerio, 10, 34127 Trieste, Italy
Abstract :
A novel operator for the enhancement of the quality of document images is presented in this paper. This operator, which is a quadratic one, is based on the Unsharp Masking (UM) technique, but it is able to limit noise amplification because every pixel of the processed image depends upon a large portion of the input image; in the same time a good response on details is obtained. A formal description of the operator´s response to noise is also presented.
Keywords :
Filtering theory; Image edge detection; Laplace equations; Noise; Polynomials; Reactive power;
Conference_Titel :
European Signal Processing Conference, 1996. EUSIPCO 1996. 8th
Conference_Location :
Trieste, Italy
Print_ISBN :
978-888-6179-83-6
