Title :
On restoration of hard-contrasted images
Author_Institution :
Wuppertal Univ., Germany
Abstract :
A method is proposed which computes the PSFs (point spread functions) in the space domain after reconstructing recognized coarse and, by preference, hard-contrast structures in an image, either by making a facsimile of them or by slicing the original; the reconstructed sharp shapes and the corresponding blurred image parts are then used as the knowns for the solution of the convolution equation. The gray values assigned by scanning devices do not satisfy the linearity assumption needed for the application of this procedure-the difference being visible mainly in hard-contrasted image parts
Keywords :
picture processing; blurred image; convolution equation; facsimile; hard-contrast structures; hard-contrasted images; image restoration; point spread functions; reconstructed sharp shapes; scanning devices; space domain; Convolution; Facsimile; Gaussian processes; Image recognition; Image reconstruction; Image restoration; Layout; Nonlinear filters; Rendering (computer graphics); Shape;
Conference_Titel :
Electrotechnical Conference, 1991. Proceedings., 6th Mediterranean
Conference_Location :
LJubljana
Print_ISBN :
0-87942-655-1
DOI :
10.1109/MELCON.1991.162074
