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Recompression of Bitmaps in PDF using JBIG2 format

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HATLAPATKA, Radim and Petr SOJKA. Recompression of Bitmaps in PDF using JBIG2 format. 2010.
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Basic information
Original name Recompression of Bitmaps in PDF using JBIG2 format
Name in Czech Rekomprese bitmap v PDF s užitím JBIG2 formátu
Authors HATLAPATKA, Radim (203 Czech Republic, guarantor, belonging to the institution) and Petr SOJKA (203 Czech Republic, belonging to the institution).
Edition 2010.
Other information
Original language English
Type of outcome Software
Field of Study Computer hardware and software
Country of publisher Czech Republic
Confidentiality degree is not subject to a state or trade secret
WWW hosting pro zdrojové kódy stránka projektu EuDML stránka projektu DML-CZ dokumentace technologie
RIV identification code RIV/00216224:14330/10:00049414
Organization unit Faculty of Informatics
Keywords (in Czech) rekomprese bitonální grafiky;PDF;jbig2enc;JBIG2;velikost PDF;optimalizace;EuDML;DML-CZ;OCR
Keywords in English JBIG2;compression;jbig2enc;PDF;PDF size optimization;EuDML;DML-CZ;OCR
Technical parameters Petr Sojka, FI MU Brno, Botanická 68a, 60200 Brno, CZ, tel. +420549496966
Tags bitmap, compression, compression ratio, DML-CZ, EuDML, JBIG2, jbig2enc, PDF, PDF Recompressor, PDF size optimization, pdfJbIm
Tags International impact
Changed by Changed by: doc. RNDr. Petr Sojka, Ph.D., učo 2378. Changed: 10. 5. 2013 13:23.
Abstract
Software for automatization of lossy (re)compression of scanned bitmaps to standard JBIG2 with adaptive optimalization level of lossiness and compression. It can be used on any PDF files that contain bitonal images (e.g. created by scanning during digitization). On these types of files the space gained by recompression is often more than 50%. In addition, the quality of the rendered page is often better than before recompression, as character candidates used during recompression are averaged over all representants recognized (by OCR techniques) in given PDF. It has been applied on 30,000+ pages of http://dml.cz and has been also used in the EuDML project. The application has been described in the peer-reviewed publications like Sojka, P., Hatlapatka, R.: Document Engineering for a Digital Library: PDF recompression using JBIG2 and other optimization of PDF documents. In Proceedings of DocEng 2010 conference. ACM, 2010. p.3-12, ISBN 978-1-4503-0231-9
Links
LA09016, research and development projectName: Účast ČR v European Research Consortium for Informatics and Mathematics (ERCIM) (Acronym: ERCIM)
Investor: Ministry of Education, Youth and Sports of the CR, INGO
1ET200190513, research and development projectName: DML-CZ: Česká digitální matematická knihovna
Investor: Academy of Sciences of the Czech Republic, Information society (National programme of research)
250503, internal MU codeName: The European Digital Mathematics Library (Acronym: EuDML)
Investor: European Union, Competitiveness and inovation framework programme
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