Multimedia information retrieval method and system

A multimedia information and indexing technology, applied in the computer field, can solve the problems that cannot meet the requirements of retrieval speed, etc., and achieve the effect of improving retrieval speed and efficiency, reducing calculation amount, and reducing the number of feature bit vectors

CN103345496BActive Publication Date: 2016-12-28新浪技术(中国)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-12-28

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Abstract

The invention discloses a multimedia information searching method and system. The method includes the steps of extracting feature data of current multimedia information, obtaining a feature bit vector of the current multimedia information according to the extracted feature data, segmenting the feature bit vector of the current multimedia information to obtain k sub-vectors of the current multimedia information, determining a candidate set corresponding to each sub-vector according to each sub-vector of the current multimedia information, finding out a feature bit vector, corresponding to each vector identification in each obtained candidate set, in a multimedia feature database, calculating hamming distances between the feature bit vector of the current multimedia information and the found feature bit vectors, and outputting the multimedia information, corresponding to the feature bit vectors with the hamming distances conforming to a preset condition, as a search result. Through the method and due to the fact that a segmentation index structure is set up to search the feature bit vectors, the searching speed of the multimedia information and the searching efficiency of the multimedia information can be greatly improved.
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Description

technical field

[0001] The invention relates to the computer field, in particular to a multimedia information retrieval method and system. Background technique

[0002] In recent years, with the rapid development of multimedia technology and computer technology, large-scale multimedia information appears more and more in many research and application fields. In order to effectively access and utilize the information contained in these huge and complex data, the traditional text-based retrieval technology has been unable to meet the growing needs of users, and the content-based retrieval technology has emerged as the times require.

[0003] The content-based retrieval method needs to extract the characteristic data of multimedia to establish a characteristic database, and then convert the retrieval of multimedia information into the neighbor retrieval of characteristic data. For large-scale multimedia information, its feature data is also large-scale. This requires an appro...

Examples

Embodiment Construction

[0057] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0058] The idea of ​​the present invention is to establish k segment index structures in advance, and use the k segment index structures to search for m (such as 32) elements in the feature bit vector of the current multimedia information when retrieving the current multimedia information. The eigenbit vectors participate in the calculation of the Hamming distance. Compared with the prior art, the first p (for example, 3) elements of the same eigenbit vectors involved in the calculation of the Hamming distance...