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Method and device for feature matching and image identification device

A feature matching and feature value technology, applied in the field of image recognition, can solve the problems of prone to misidentification and time-consuming, and achieve the effects of avoiding misidentification, high matching accuracy, and improving matching efficiency

Active Publication Date: 2014-09-17
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a feature matching method, device, and image recognition device, aiming to solve the problem that the feature matching method provided by the prior art is time-consuming or prone to misidentification

Method used

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  • Method and device for feature matching and image identification device
  • Method and device for feature matching and image identification device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] figure 1 The implementation flow of the feature matching method provided by Embodiment 1 of the present invention is shown, and the details are as follows:

[0067] In step S101, the features obtained at the current time point are stored in the sub-pattern library.

[0068] In this embodiment, the features in the pattern library and the features in the test library can be described by certain character strings, numbers or symbols.

[0069] In this embodiment, Lib_ti (i=1, 2, 3...N) is used to represent the features obtained at time ti. Among them, ti represents time, Lib_t1 represents the feature obtained at time t1, Lib_t2 represents the feature obtained at time t2, the larger the i in ti, the longer the time experience, and each Lib_ti can be a string of characters, numbers or symbols To represent.

[0070] Test_ti (i=1,2,3...M) represents the characteristics of the test library obtained at time ti, the larger the i in ti, the longer the time experience, and each T...

Embodiment 2

[0095] Figure 5 The implementation flow of the feature matching method provided by Embodiment 2 of the present invention is shown, and the details are as follows:

[0096] In step S501, the features obtained at the current time point are stored in the sub-pattern library.

[0097] In step S502, the sub-pattern library is added into the pattern library.

[0098] In step S503, the features of the sub-pattern library are divided into p feature segments.

[0099] In step S504, the p feature segments of the features of the sub-pattern library are correspondingly mapped to corresponding hash addresses of p hash tables through p hash functions.

[0100] In this embodiment, the features of the sub-pattern library are divided into p feature segments, such as Figure 6 shown. From Figure 6 As can be seen from , the sub-pattern library is characterized by characters, numbers or symbols, and these characters, numbers or symbols need to be segmented in practice, and here they are di...

Embodiment 3

[0112] Figure 10 A specific structural block diagram of the feature matching device provided by Embodiment 3 of the present invention is shown. For convenience of description, only parts related to the embodiment of the present invention are shown. The device 10 can be built into a computer, or can be built into a special image recognition device to complete image recognition, such as fingerprint recognition. The device 10 includes: a sub-pattern library creation unit 101, a sub-pattern library storage unit 102 , a sub-pattern library mapping unit 103 , a first request receiving unit 104 , a sub-test library mapping unit 105 , a first matching unit 106 and a second matching unit 107 .

[0113] Wherein, the sub-pattern library creation unit 101 is used to store the features obtained at the current time point into the sub-pattern library;

[0114] A sub-pattern library storage unit 102, configured to add the sub-pattern library to the pattern library;

[0115] A sub-pattern l...

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Abstract

The invention is suitable for the field of image identification, and provides a method and device for feature matching and an image identification device. The method includes the steps that features obtained at a time point are stored in one sub-model-bank, after the sub-model-banks are added into a model bank, the features of the sub-model-banks added each time only need to be mapped into corresponding Hash addresses of a Hash table, when a tested bank needs to be matched with the model bank, newly-added sub-tested-banks are firstly mapped into corresponding Hash addresses of the Hash table, then features of the sub-tested-banks are matched with the features in the mapped Hash addresses, and the matching results can be obtained. Compared with the prior art, the method, the device and the image identification device have the advantages that when matching is carried out each time, the whole model bank does not need to be mapped into corresponding Hash addresses of the Hash table, the spent time is short, and the matching efficiency is easily improved; in addition, matching is carried out according to the Hash function, wrong identification generated when a Brun filter is adopted can be avoided, and the matching accuracy is high.

Description

technical field [0001] The invention belongs to the field of image recognition, in particular to a feature matching method, device and image recognition equipment. Background technique [0002] In the process of image feature comparison, in many cases, the features of the existing pattern library are calculated in advance, and then stored in a specified location, and finally the features in the test library and those stored in the pattern library are obtained. The features are compared to obtain the comparison result. The pattern libraries mentioned here are often completed or established offline in advance, but in actual applications, in some environmental requirements, the pattern library changes with the changes of external requirements. When the amount of comparison is small When the specified requirements can be met based on the current hardware and software environment, but when the amount of comparison is large and the comparison is based on tens of thousands or more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06K9/00
CPCG06F18/22
Inventor 周龙沙邵诗强
Owner TCL CORPORATION
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