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Content-based image search method and device

A picture search and picture technology, applied in the field of content-based picture search methods and devices, can solve problems such as inability to accurately understand user needs, waste of user energy, and failure to obtain

Inactive Publication Date: 2014-05-14
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing content-based image search technology cannot accurately understand the user's needs. The search results returned to the user often make the user unable to quickly obtain the desired information from it, which wastes system resources on the one hand and wastes time on the other. The user's energy can't get the desired result, and the experience is poor

Method used

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  • Content-based image search method and device

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Experimental program
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Embodiment 1

[0080] figure 1 It is a flow chart of the content-based image search method provided by Embodiment 1 of the present invention, as shown in figure 1 As shown, the method specifically includes the following steps:

[0081] Step 101: Obtain the picture that the user wants to search for.

[0082] When a user needs to search for images, he will upload the image to be searched to the search engine or drag a pair of images to the location specified by the search engine, etc., and the search engine will first obtain the images that the user searches through these methods.

[0083] Step 102: Retrieve the picture to be searched from the picture library based on the content of the picture to obtain related pictures.

[0084] In this step, the local features are first extracted from the image to be searched, and the local features can be extracted using Gaussian difference (DoG, Difference of Gaussian) filter operator and scale-invariant feature transform (SIFT, Scale-invariant feature ...

Embodiment 2

[0124] image 3 The structural diagram of the content-based image search device provided by Embodiment 2 of the present invention, as shown in image 3 As shown, the device includes: a picture acquisition unit 300 , a picture retrieval unit 310 , a candidate word extraction unit 320 , a subject word selection unit 330 , a picture sorting unit 340 and a result output unit 350 .

[0125] The picture obtaining unit 300 is configured to obtain a picture to be searched by the user. When the user needs to search for images, he will upload the image to be searched to the search engine or drag a pair of images to the location specified by the search engine, etc., and the image acquisition unit 300 first acquires the images that the user searches through these methods.

[0126]The image retrieval unit 310 is configured to retrieve the image to be searched from the image library based on the image content to obtain related images. Specific implementation: extract local features from t...

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Abstract

The invention provides a content-based image search method and device. The method includes: acquiring an image that a user needs to search for; searching for the image, to be searched, in an image library on the basis of image content, thereby obtaining the related images; extracting candidate subject terms from context of the related images; determining confidence coefficient of the candidate subject terms, by fusing statistical characteristics of the candidate subject terms to at least one of property characteristics, structural characteristics, field characteristics and term relation characteristics, and selecting subject terms from the candidate subject terms according to the confidence coefficient; according to conditions of similarity of the selected subject terms to the related images, ranking the related images, including the images in search results, and returning the search results to a user. The content-based image search method and device has the advantages that image search results that users require can be accurately provided, system resources are saved and user experience is improved.

Description

【Technical field】 [0001] The invention relates to the field of computer application technology, in particular to a content-based image search method and device. 【Background technique】 [0002] Among all kinds of information that people obtain, auditory information accounts for 20%, visual information accounts for 60%, and other information accounts for 20%. It can be seen that picture information occupies an important position in people's information life. How to obtain the picture information needed by users faster and better is an important issue to be solved urgently. With the rapid development of the Internet, more and more people expect to obtain the picture information they need from this information. However, in the face of a huge amount of picture information, it is not easy to accurately obtain the information users need, so content-based picture search Technology came into being. [0003] However, the existing content-based image search technology cannot accurate...

Claims

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Application Information

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IPC IPC(8): G06F17/30
CPCG06F16/583
Inventor 方高林
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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