DocumentCode
2615380
Title
Unscreening using a hybrid filtering approach
Author
Fan, Zhigang
Author_Institution
Xerox Webster Res. Center, NY, USA
Volume
3
fYear
1996
fDate
16-19 Sep 1996
Firstpage
351
Abstract
This paper presents a method for retrieving a gray picture from a halftone image. The algorithm performs a two dimensional (2-D) filtering which is composed of a 1-D lowpass filtering in one direction and a 1-D pattern matching in a perpendicular direction. It provides substantially better detail than the traditional lowpass filtering approach, yet it is robust to noise and distortions. The technique can be applied to both orthographical halftones and scanned halftones
Keywords
filtering theory; image matching; image processing; low-pass filters; pattern matching; two-dimensional digital filters; 1D lowpass filtering; 1D pattern matching; 2D filtering; gray picture retrieval; halftone image; hybrid filtering approach; orthographical halftones; scanned halftones; two dimensional filtering; unscreening; Computer errors; Constraint optimization; Filtering algorithms; Frequency; Image recognition; Image retrieval; Matched filters; Noise robustness; Pattern matching; Pattern recognition;
fLanguage
English
Publisher
ieee
Conference_Titel
Image Processing, 1996. Proceedings., International Conference on
Conference_Location
Lausanne
Print_ISBN
0-7803-3259-8
Type
conf
DOI
10.1109/ICIP.1996.560503
Filename
560503
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