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Double compensation based multi-table Hash image retrieval method

A multi-table hashing and image retrieval technology, which is applied in still image data retrieval, special data processing applications, instruments, etc., can solve the problem that multi-table hashing requires more overhead, achieve fast query speed, obtain query effect, The effect of good query results

Active Publication Date: 2017-05-31
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the existing hash image retrieval method in multi-table retrieval, and propose a multi-table hash image retrieval method with double compensation. This method mainly reflects relatively good performance and can solve the problem of Disadvantages of multi-table hashing requiring more overhead under the same performance

Method used

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  • Double compensation based multi-table Hash image retrieval method
  • Double compensation based multi-table Hash image retrieval method

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Embodiment Construction

[0062] The present invention will be further described below in conjunction with specific examples.

[0063] Such as figure 1 As shown, it is the operation flowchart of the double-compensated multi-table hash image retrieval method of the present invention, which is divided into two parts: offline training and online query, wherein feature extraction in offline training and hash table training all need to spend It takes a lot of time, but it is within an acceptable range because it is offline and does not affect query performance. exist Figure 2 to Figure 4 It is an evaluation of query performance, which is described below.

[0064] In this example, this method is implemented on the CIFAR10 dataset to establish retrieval and evaluate performance. Hardware includes, 128G memory server. Software includes MATLAB. The CIFAR10 dataset is a dataset with 60,000 images grouped into 10 categories. Among them, 1,000 images are randomly selected as queries, and the remaining 59,00...

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Abstract

The invention discloses a double compensation based multi-table Hash image retrieval method. The method comprises the steps of image characteristics extraction and category information processing, Hash table training, mapping of image characteristics to hamming space according to Hash tables and category weight calculation, hamming distance calculation based on query and query result returning and re-sorting operation. The method has the advantages of being quick in query response, small in internal storage expenditure and high query performance on the aspect of image retrieval, is greatly improved on the aspect of multi-table Hash image retrieval and overcomes the shortcoming of additional expenditure of multi-table Hash.

Description

technical field [0001] The invention relates to the technical field of image retrieval, in particular to a double-compensation multi-table hash image retrieval method. Background technique [0002] With the development of the Internet, the number of multimedia files has grown rapidly, and the images uploaded by people have also become a very large scale. This poses a very big challenge to the image retrieval problem. Traditional retrieval methods based on tree structure generally require a lot of additional auxiliary space, which even exceeds the size of the original image data; and once the feature dimension of the image is large, the performance of the method based on tree structure will decrease. Degenerated, even to the complexity of linear retrieval. In contrast, hash-based image retrieval methods consistently have superlinear time complexity and require a satisfactory auxiliary space. [0003] For a hash-based image retrieval method with F hash bits, the image is fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/50
Inventor 吴永贤周先成田星
Owner SOUTH CHINA UNIV OF TECH
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