DocumentCode
1712766
Title
Algorithms for coding scanned halftone pictures
Author
Forchhammer, Søren ; Forchhammer, Morten
Author_Institution
Inst. of Telecommun., Tech. Univ. of Denmark, Lyngby, Denmark
fYear
1988
Firstpage
297
Abstract
A method for coding scanned documents containing halftone pictures, e.g. newspapers and magazines, for transmission purposes is proposed. The halftone screen is estimated and the grey value of each dot is found, thus giving a compact description. At the receiver the picture is rescreened. A novel data structure and related algorithms for handling the digital screen without restrictions on the screen parameters is presented. Data compression rates above 20 are obtained for the halftone pictures. The algorithms are suited for implementation with fast dedicated hardware. The rescreening can also be used as digital halftoning with arbitrary screens, using lookup tables
Keywords
computerised picture processing; data compression; encoding; coding; computerised picture processing; data compression; data structure; digital halftoning; encoding; grey value; halftone screen; lookup tables; scanned halftone pictures; Art; Data compression; Data structures; Facsimile; Graphics; Hardware; Image resolution; Image segmentation; Parameter estimation; Production;
fLanguage
English
Publisher
ieee
Conference_Titel
Pattern Recognition, 1988., 9th International Conference on
Conference_Location
Rome
Print_ISBN
0-8186-0878-1
Type
conf
DOI
10.1109/ICPR.1988.28226
Filename
28226
Link To Document