Fujitsu Develops Image Restoration Technology Capable of Making A3-Sized PDFs
Using A4 Scanner
Creates PDFs of double-sided A3 documents with minimal distortion and less than
20% of the manual effort
Kawasaki, Japan, Nov 13, 2012 - (JCN Newswire) - Fujitsu Laboratories Limited
today announced the development of image restoration technology that can
generate PDFs from multi-page A3 documents fed as a batch into an A4 scanner.
Typically, scanning both sides of a double-sided A3 document with an A4
scanner involves folding each sheet in half and manually feeding it twice into
the scanner. With Fujitsu Laboratories' new technology, by simply cutting
A3 sheets in half and scanning them using a scanner's automatic feeder,
the original A3 layout of the scanned images can be automatically detected and
composite A3 images assembled. At the same time, image correction is applied so
that the boundaries between left and right halves are inconspicuous. As a
result, A3 documents can be converted to PDFs using an A4 scanner with less
than 20% of the effort.
Details of this technology are being presented at the International Conference
on Pattern Recognition (ICPR) 2012, beginning November 12 at the Tsukuba
International Congress Center, and at the December Study Group of CVIM2012,
beginning December 3 at Yokohama National University.
With the spread of the paperless office, more and more existing paper
documents are being converted to PDFs for electronic storage. While compact
desktop scanners can efficiently handle the PDF conversion of paper documents,
A4-sized scanners are most frequently employed, and there has been no easy way
using them to scan A3 documents. The typical approach for scanning an A3
document has been to fold the document in half and then manually feed each
sheet carefully into a two-sided scanner. This requires considerable effort,
particularly for multi-page documents.
By cutting an A3 document in half, the automatic sheet feeder on a scanner can
be used for batch-mode scanning to avoid the effort of folding and manually
feeding each sheet. At the same time, this approach creates its own problems:
1. Batch-scanning a multi-page document means the left and right halves of
each A3 document can easily wind up being mixed together in no particular
order, making it difficult to reassemble the original A3 images.
2. When paper is being fed into the scanner, sheets may slide around or be fed
in at slightly different speeds. After having scanned the left and right halves
separately, this will create mismatches in text and figures at the boundary
between the two when reassembling the original.
About the New Technology
Fujitsu Laboratories has developed a technology that, after cutting multi-page
A3 documents in half and batch-scanning the images, they are restored to their
original A3 layout. Key features of this technology are as follows.
1. Automatic estimation of image grouping to restore A3 document image
From the intermixed scanned images of the left and right halves of an A3
document, the technology will automatically estimate how images are grouped to
recreate the original A3-page layout.
2. Correction of localized stretching in scanned images
This technology corrects localized stretching in scanned images, thereby
enabling lines, text and diagrams to come together naturally at the boundary
when joining left- and right-side scanned images of an original A3 document
This technology makes it possible to easily scan multi-page A3 documents with
a compact A4-sized scanner. Compared to the previous approach of folding in
half and scanning each A3 sheet, the manual labor involved in this method
requires less than 20% of the effort and produces composite A3 documents with
fewer boundary mismatches than existing methods.
To further accelerate image processing, Fujitsu Laboratories is aiming to
equip A4-size scanners with this functionality. The company will also move
forward on developing technology that generates scans the same size as the
original image, even for documents larger than A3 cut into more than two
pieces, simply by scanning their separate parts.
About Fujitsu Laboratories
Founded in 1968 as a wholly owned subsidiary of Fujitsu Limited, Fujitsu
Laboratories Limited is one of the premier research centers in the world. With
a global network of laboratories in Japan, China, the United States and Europe,
the organization conducts a wide range of basic and applied research in the
areas of Next-generation Services, Computer Servers, Networks, Electronic
Devices and Advanced Materials. For more information, please see:
About Fujitsu Limited
Fujitsu is the leading Japanese information and communication technology (ICT)
company offering a full range of technology products, solutions and services.
Over 170,000 Fujitsu people support customers in more than 100 countries. We
use our experience and the power of ICT to shape the future of society with our
customers. Fujitsu Limited (TSE:6702) reported consolidated revenues of 4.5
trillion yen (US$54 billion) for the fiscal year ended March 31, 2012. For more
information, please see www.fujitsu.com.
Public and Investor Relations
Fujitsu Laboratories Ltd.
Media Processing System Laboratories
Image Computing Lab.
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