The Background and Significance of Digital Library
* The development of the Internet allows people to share information across the boundaries of time and space;
* "Rejuvenating the country through science and education" is the country's long-term strategy;
* The era of knowledge economy has arrived;
The popularity of the Internet has enabled online education (online education) to grow gradually. In the near future, online education will become the general trend of the future education industry.
With the development of information technology, the amount of information that needs to be stored and disseminated is increasing, and the types and forms of information are becoming more and more abundant. The mechanism of traditional libraries obviously cannot meet these needs. Therefore, people put forward the idea of ​​digital library.
Definition of digital library
The digital library is a storage of electronic information. It can store a large amount of information in various forms. Users can easily access it through the network to obtain this information. Information storage and user access are not restricted by geography.
The digital library is the development of the traditional library in the information age. It not only includes the functions of the traditional library and provides corresponding services to the public, but also integrates some functions of other information resources (such as museums and archives) to provide Comprehensive public information access service. It can be said that the digital library will become the public information center and hub of the future society. Reflects the general trend of informatization, networking and digitization.
Peripheral environment:
At present, developed countries in the world have invested a lot of resources to step up the construction of digital libraries.
For example, the NSF / A8PA / NASA digital library invested by the National Natural Science Foundation of US $ 100 million will cover large-scale document libraries, spatial theater libraries, geographic image sources, and audiovisual resource libraries. The US also invested US $ 30 million to build the US The Digital Library Alliance project focuses on information on American historical and cultural achievements.
Japan will complete the Kansai Library project of the National Library of Japan in 2002, and plans to become Japan ’s largest digital library and documentation center in Asia. These circumstances indicate that the developed countries regard the construction of digital libraries as an important content of future social and cultural construction, and attach great importance to it.
Contents covered by the digital library:
Digital resources of a certain scale and relatively independent from content or theme;
Network equipment and communication conditions that can be used for wide area network (mainly Internet) services;
A complete set of efficient digital library operation and construction processes and phased implementation plans that meet standards and specifications.
The digital library mainly includes the following important system engineering:
1. Acquisition and creation of information--digital processing of books
2. Storage and management--building a massive network storage mechanism
3. Access and query-search engine, standard classification retrieval system
4. Authority management-online reading system
5. Dynamic publishing-web database, middleware
Advantages of digital libraries
Traditional library
digital library
Library construction
Book purchase
Created by digital resources
Book resource preservation
Collection
Storage (multimedia database)
Query retrieval method
catalog
Identify, index and generate indexes
service method
Loan circulation
Internet-based classification retrieval system
control
Circulation management
authority management
Realization means of digital library
The existing physical collections are processed into electronic books using various advanced digital methods.
Through professional identification, indexing, classification retrieval, and Internet publishing system integration, a digital reading environment is built. Use permission access mechanism for readers to call and view remotely in real time.
Second, the process of building a digital library
(1) Digitization of books
The digitization of books is the foundation of building a digital library. The ultimate goal of digitization of books is to generate electronic books that can be browsed online and borrowed online. In other words, the collection of the digital library is an electronic book, and the meaning of the electronic book to the digital library is the same as that of water to rivers and vehicles to highways.
E-books are made from physical books through the process of book digitization. Then use the identification, compression, synthesis, indexing and other links to generate a certain format. Common e-book formats include founder's ceb format, superstar pdg and so on.
(2) Workflow of digital book processing
Digital libraries need high-quality e-books. How to process books into electronic books quickly and with high fidelity is the most important part of building a digital library.
In the processing of various types of document image data, the digitization of books is very demanding. This is reflected in both quality and efficiency. Because the purpose of book digitization is to eventually establish a "digital library", which is convenient for readers to check and borrow online. So many reference indicators will affect the quality and usability of the final e-book.
Requirements for digital processing of books:
Ensuring font reduction-fully maintain the original appearance of Chinese fonts in books.
Image quality and page quality of e-books-remove the noise on the page and get high-quality images for easy reading and full text recognition in the future.
Processing efficiency-the rapid construction of digital resources to increase output per unit of time.
All process integration-easy to manage, can control the progress and quality.
Digital book processing flow
Digitization of books, also known as "book material processing". It is the core link of building a digital library and the most important process.
The book digitization process generally includes:
â—† Book breakdown
â—† Book scanning
â—† Identification
â—† Generate eBook
â—† Automatic indexing
â—† Establish a standard classification system
â—† Internet publishing (using advanced large database technology and middleware)
â—† Build access control authority system (network-based all-digital book lending system)
â—† Open to visitors
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