Proc. SPIE. 6982, Mobile Multimedia/Image Processing, Security, and Applications 2008
KEYWORDS: Mobile devices, Data storage, Databases, Control systems, Personal digital assistants, Telecommunications, System identification, Associative arrays, Wireless communications, Computer security
An RFID-based mobile handheld inventory management system is proposed in this paper. Differing from the manual
inventory management method, the proposed system works on the personal digital assistant (PDA) with an RFID reader.
The system identifies electronic tags on the properties and checks the property information in the back-end database
server through a ubiquitous wireless network. The system also provides a set of functions to manage the back-end
inventory database and assigns different levels of access privilege according to various user categories. In the back-end
database server, to prevent improper or illegal accesses, the server not only stores the inventory database and user
privilege information, but also keeps track of the user activities in the server including the login and logout time and
location, the records of database accessing, and every modification of the tables. Some experimental results are presented
to verify the applicability of the integrated RFID-based mobile handheld inventory management system.
In this paper, we propose an intelligent bird information retrieval system which aims to construct a mobility-learning
activity under the up-to-date wireless technology. The system consists of a Tablet PC and PDAs with wireless networking
capabilities. The PDA is equipped with a friendly retrieval interface and a good learning environment. In our system, users
only need to click the buttons or input the keywords to retrieve bird information. Besides, users can discuss or share their
information and knowledge via the wireless network. Our system saves bird information in four categories including "Introduction," "Images," "Sound," "Streaming Media," and "Ecological Memo." The integral knowledge helps users
understand more about birds. Data mining and fuzzy association rules are applied to recommend users those birds they
may be interested in. A streaming server on the Tablet PC is built to provide the streaming media for PDA users. By this
way, PDA users can enjoy the multimedia from Tablet PC in real time without downloading completely. Finally, the
system is a perfect tool for outdoor teaching and can be easily extended to provide navigation and touring services for
national parks or museums.
One of the great challenges of the existing watermarking methods is their limited resistance to the extensive geometric
attacks. Geometric attacks can be decomposed into two classes: global distortion such as rotations and translations and
local distortion such as the StirMark attack. We have found that the weakness of multiple watermark embedding methods
that were initially designed to resist geometric attacks is the inability to withstand the combination of geometric attacks.
In this paper, the watermark is used in the gray-scale authentication image. We propose a robust image watermarking
scheme that can withstand the geometric attacks by using local tri-mesh feature points. Our proposed method can resynchronize
the attacked images and is independent of the embedding and authentication process. The geometric
invariant scheme is combined with the complementary modulation embedding strategy to enhance the resistance of
geometric attacks. The experimental results verify that the proposed scheme is effective for geometric attacks.