Cryptography Reference
In-Depth Information
Table 10.2.
The developments of print-to-web linking technology in Japan.
Release Date
Manufacturer (Product Name)
Technique/Decode Type
2003/06/16
Kyodo Printing Co., Ltd. [19]
Color Domain/Server
2003/07/07
NTT (Cyber-Squash) [20]
Spatial Domain/Server
2003/11/10
M.Ken.Co., Ltd.(i-acuaport) [21]
Frequency Domain/Local
2004/01/27
NTT (P-warp) [22]
Special Design/Server
2004/06/21
MediaGrid Inc.(ClickPix!) [23]
Spatial Domain/Server
Technique resource:
Digimarc Corporation, U.S.A [14]
2004/06/30
Fujitsu Laboratories Ltd. [24]
Color Domain/Local
2004/07/20
SANYO Electric Co., Ltd. [25]
Frequency Domain/Server
2004/08/12
C4 Technology, Inc.(MiLuLa) [17]
Image Feature/Server
2004/11/11
Olypus Corporation (SyncR) [26]
Image Recognize/Local
2005/03/01
Colozip Japan Inc.(ColorCode) [12]
Color Domain/Local
Technique resource:
Colozip Media Inc. Korea [12]
of print-to-web linking technology using mobile phone can be divided into
four categories: button inputting methods, the readable code methods, the
watermarking methods, and the image recognition methods.
The button inputting methods are the simplest and are used for the appli-
cations of print-to-web linking technology. The methods can be completed by
only pushing buttons in a mobile phone. It is often a frequent complaint that
it is too troublesome to input a long URL into a mobile phone using buttons
in a mobile phone, they remain basic functions of a mobile phone used for
print-to-web linking technology.
Readable code methods, especially the two-dimensional bar code methods,
have been widely used in mobile phones to replace the button inputting meth-
ods. The methods can be completed with high reliability and provide website
linking at a low cost. These methods require the additional space to print the
sample with a bar code. Moreover, the dull design of the bar code will reduce
the effectiveness of the samples when used for advertisement. It is for these
reasons that many advertising agencies are still trying to find new methods
to replace the bar code or to use QR code methods.
Watermarking methods are proposed to replace the bar code method. They
have the merit that they do not require the additional space to print some
marks with the samples on the papers. There are some restrictions on the ap-
plications of the watermarking methods, as embedding the information about
URL on an image will reduce the image quality of the samples. The major
problem is the geometrical distortion of the images when extracting the in-
formation of URL from a printed image captured by a mobile phone camera.
As for watermarking methods, the image recognition methods, and espe-
cially the image feature extracting methods were proposed to replace the bar
