Single-sample face recognition method based on feature expansion

A single-sample, sample-person technology, applied in the field of face recognition, can solve problems such as lack of intra-class differences, inability to predict intra-class changes in test images, and affect face recognition performance

Active Publication Date: 2019-08-06
成都电科智达科技有限公司
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AI Technical Summary

Problems solved by technology

Since there is only one training sample per class, the lack of intra-class differences makes it impossible to predict the intra-class variation of test images, which seriously affects the performance of single-sample face recognition

Method used

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  • Single-sample face recognition method based on feature expansion
  • Single-sample face recognition method based on feature expansion
  • Single-sample face recognition method based on feature expansion

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Experimental program
Comparison scheme
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specific Embodiment approach

[0041] The specific implementation is as follows:

[0042] A. Preprocess all images (mainly including face detection alignment and normalization)

[0043] B. Pre-training the classification model on the diverse face dataset CASIA-WebFace

[0044] C. Apply the pre-trained model to the single-sample training set, and extract the face features of the single-sample training set.

[0045] D. Expand the single-sample features in the feature space, and use the expanded features to fine-tune the last layer of softmax classifier.

[0046] E. Input the test data set into the trained network to get the recognition result

[0047] In the present invention, a single-sample training set recognition test is carried out on three data sets of ORL, LFW, and FERET. Among them, ORL has a total of 40 people, and each person has 10 face images, and each person chooses one as training, and the rest as testing. Select the first 50 people from the LFW data set with more than 10 samples for trainin...

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Abstract

The invention belongs to the technical field of face recognition, and relates to a single-sample face recognition method based on feature expansion. Based on transfer learning, a deep convolutional neural network is adopted to extract face features with robustness, and a sample expansion method of a feature space is provided and comprises the following steps: firstly, based on transfer learning, training a deep convolutional neural network on a multi-sample public face set, applying the deep convolutional neural network to a target face data set, and extracting the face features by using a pre-trained model; and expanding the data in the feature space by using the intra-class difference of the auxiliary data set, and training a classifier by using the expanded data to obtain better identification performance. The sample expansion method based on the feature space overcomes the problem of insufficient samples, is more potential than the data enhancement of a common image domain, and improves the recognition rate of the model.

Description

technical field [0001] The invention belongs to the technical field of face recognition, and relates to a single-sample face recognition method based on feature expansion. Background technique [0002] Face recognition has become a popular research direction due to the fact that face recognition has become more and more widely used in practice. A large number of face recognition algorithms have been proposed, but most algorithms need sufficient representative training data to achieve good performance. In fact, it is very difficult to collect a large number of training samples, which is also the current face recognition technology. One of the main challenges. In some special occasions, such as law enforcement, passport verification, identity verification, etc., each person can only get one image. Especially in large-scale recognition applications, if you want to collect more training samples for each person, it will inevitably cause extremely expensive costs, so you can onl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
CPCG06V40/168G06V40/172G06F18/214Y02T10/40
Inventor 曹宗杰徐升平
Owner 成都电科智达科技有限公司
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