Image retrieval method based on content and feedback
An image retrieval and content technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficulty in collecting global information, limited keyword accuracy, and difficulty in ensuring retrieval accuracy
Inactive Publication Date: 2013-07-24
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
At present, in P2P networks, image retrieval is mainly based on the matching of image names and keywords, but this method is limited by the accuracy of keywords, and when users need to find pictures that are similar to the example picture, keyword-based Retrieval cannot meet its needs
Content-based image retrieval technology is the development direction to solve this problem, but the existing solutions rely on global information, and in a distributed environment composed of a decentralized data center based on a P2P network, it is difficult to collect global information
In addition, the current content-based image retrieval technology often retrieves some irrelevant images, that is, the retrieval accuracy is difficult to guarantee.
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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0039] see figure 1 , introducing a content-based and feedback-based image retrieval method proposed by the present invention, said method comprising the following steps:
[0040] (1) The process of building an image index database: For each database image, the resource nodes on the structured P2P-Chord ring network calculate the feature vector of the database image, and calculate the multiple Resource ID; then, for each resource ID of the library image, construct a corresponding index message, and issue the index message to the structured P2P-Chord ring network according to the Chord protocol, and the structured P2P-Chord ring network The index node on the network processes and saves the received index message of the database image according to the Chord protoco...
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An image retrieval method based on content and feedback includes the following operating steps: step 1, an image index database is established, namely indexing messages are constructed for database establishing images and published to a structuring peer-to-peer (P2P)-Chord loop network according to the Chord protocol, so that the image index database is established on the basis of the structuring P2P-Chord loop network; step 2, an image inquiring process is carried out, for a query image, an image query message is constructed and published, a query user can update and repeat query operation on the basis of a feedback result, and therefore a query result is optimized; and step 3, the image index database is updated, more specifically, the image index database is updated through resource nodes and indexing nodes according to a set cycle. The image retrieval method based on the content and the feedback provides an efficient organization structure and a routing mechanism for an image query, and improves searching efficiency and query satisfaction degree.
Description
technical field [0001] The invention relates to an image retrieval method based on content and feedback, which belongs to the technical field of cloud computing information, in particular to the technical field of image retrieval based on a structured P2P-Chord ring network. Background technique [0002] Cloud computing does not require users to manage and maintain resources, provides reliable and unlimited storage space, allows access to data anytime and anywhere, and supports dynamic allocation of resources for multiple users. Data center is one of the key technologies of cloud computing. At present, there are two main topological structures of data center: centralized structure and decentralized structure. In a centralized structure, the central node is responsible for processing all the data in the data center, so the structure is vulnerable to a single point of failure. Therefore, people have proposed a data center with a decentralized structure represented by a peer-t...
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Inventor 廖建新徐童杨迪王敬宇戚琦李彤红朱晓民
Owner BEIJING UNIV OF POSTS & TELECOMM