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A bayonet vehicle retrieval system and method based on local features and deep learning

A local feature and deep learning technology, applied in the field of bayonet vehicle retrieval system, can solve the problems of not reaching the level of fine-grained vehicle retrieval and not being accurate enough

Active Publication Date: 2020-10-16
ZHEJIANG YINJIANG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] "Deep Learning-Based Vehicle Vehicle Identification Model Construction Method and Vehicle Vehicle Identification Method", application number 201610962720.5, using deep learning for vehicle vehicle identification, which has not reached the level of fine-grained vehicle retrieval and is not accurate enough

Method used

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  • A bayonet vehicle retrieval system and method based on local features and deep learning
  • A bayonet vehicle retrieval system and method based on local features and deep learning
  • A bayonet vehicle retrieval system and method based on local features and deep learning

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Experimental program
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Effect test

Embodiment

[0101] Embodiment: a kind of vehicle picture retrieval method based on local feature and deep learning, comprises the steps:

[0102] (1) extracting the image features of the image to be detected;

[0103] Image features can be global features or regional features, and can be extracted using deep neural networks or SIFT, SURF and other methods. The deep neural network includes Alexnet network, vgg network, GoogleNet network, etc. Specifically, the classic vgg16 network is used to extract vehicle features, the loss function is jointly trained with softmax and triple loss, and the last fully connected layer is extracted. The vector of 1000*1 dimension is used as global features. The SIFT method is used to extract the features of vehicle annual inspection marks and lights as local features.

[0104] (2) The product of the image feature of the image to be detected and the overall weight matrix is ​​obtained to obtain the binary feature code of the image to be detected;

[0105]...

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Abstract

The present invention relates to a bayonet vehicle retrieval system and method based on local features and deep learning. The present invention uses a deep neural network to extract vehicle global features, and the loss function uses a loss function of softmax loss and triple loss function to train the network. At the same time, the model extracts the features of the annual inspection standard and the lamp features, completes the acquisition of local feature vectors, and finally weights and combines the local feature vectors and the global feature vectors of the last fully connected layer of the neural network as vehicle features for retrieval. The retrieval uses an improved k- The means algorithm finds the K class, and then uses the SVM to form a hash function to encode the Hamming code, which improves the retrieval speed and retrieval accuracy, and saves storage space.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to a checkpoint vehicle retrieval system and method based on local features and deep learning. Background technique [0002] With the development of society, intelligent traffic monitoring in the field of intelligent transportation is a very important development direction at present. At present, a large number of electronic police and checkpoint systems have been deployed on urban roads in my country. These systems can capture high-definition pictures of vehicles in real time, and identify and analyze the license plate number, as well as some vehicle model information (such as vehicle size, color, etc.). However, in the currently used bayonet monitoring system, the license plate number recognition still has a misrecognition and missed recognition rate of about 10%. More importantly, it will not be possible to identify illegal vehicles with license plates or deliberately c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/62G06F16/583
CPCG06F16/583G06V20/52G06F18/2411G06F18/214
Inventor 温晓岳田玉兰陈涛李建元
Owner ZHEJIANG YINJIANG RES INST
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