Unsupervised image classification method based on automatic encoder

An autoencoder and autoencoder technology, which is applied in neural learning methods, instruments, biological neural network models, etc., can solve problems such as cumbersome process, low precision, and high cost of manual labeling, and achieve avoidance of manual labeling, simple architecture, The effect of reducing labor costs and labor intensity

Inactive Publication Date: 2021-08-17
LYNCWELL INNOVATION INTELLIGENT SYST ZHEJIANG CO LTD
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AI Technical Summary

Problems solved by technology

[0002] With the development of information technology, image data has increased dramatically, and the demand for image processing has also greatly increased. In real life, due to factors such as blurred images, unclear fonts, and shooting angles, the quality of collected images is often not high. Affected the accuracy of image classification
Traditional image classification methods require manual design of features, which is cumbersome and has low accuracy
Although the current deep learning related methods do not require manual feature selection and have high accuracy, they often require a large amount of label data, and the cost of manual labeling is high.

Method used

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  • Unsupervised image classification method based on automatic encoder
  • Unsupervised image classification method based on automatic encoder
  • Unsupervised image classification method based on automatic encoder

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Embodiment 1

[0041] The present invention takes the mnsit data set as an example. The mnsit contains 60,000 training images and 10,000 test images; the size of each image is 28*28, and there are 10 categories in total, such as figure 2 shown.

[0042] First, construct an autoencoder model as described in step S1, the compressed feature vector in the autoencoder model is set to N=3, then, take out the image in the training set, copy the image twice, and do different random transformation, such as image 3 shown.

[0043] in image 3 where a represents random translation, and b represents random rotation. Through the loss designed in step 2, the transformed image is input into the self-encoder, the loss is calculated, and the gradient is calculated through backpropagation to update the weight of the self-encoder. This loops until the autoencoder converges. Then, use the encoder in the autoencoder model to encode all the images in the test set into 3-dimensional feature vectors. The en...

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Abstract

The invention discloses an unsupervised image classification method based on an automatic encoder. The method comprises the following steps: S1, designing an automatic encoder model based on a convolutional neural network architecture; S2, enabling an auto-encoder model to extract feature information in the image through multi-task loss; S3, preparing to-be-classified image data, and carrying out the self-encoder model training; S4, after the auto-encoder model is trained, enabling the auto-encoder model to complete the encoding of feature information in the image; S5, filtering the noise and background information in the original image through coding of the auto-encoder model, and completing the image classification. According to the method, learning can be carried out without any label or model, so that the image classification task is completed, and the labor cost is reduced.

Description

technical field [0001] The invention relates to an image classification method, in particular to an unsupervised image classification method based on an automatic encoder. Background technique [0002] With the development of information technology, image data has increased dramatically, and the demand for image processing has also greatly increased. In real life, due to factors such as blurred images, unclear fonts, and shooting angles, the quality of collected images is often not high. affect the accuracy of image classification. Traditional image classification methods require manual design of features, which is cumbersome and has low accuracy. Although the current deep learning-related methods do not require manual feature selection and have high accuracy, they often require a large amount of labeled data, and the cost of manual labeling is high. Contents of the invention [0003] The object of the present invention is to provide an unsupervised image classification ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06N3/04G06N3/08
CPCG06N3/088G06N3/045G06F18/23213G06F18/24G06F18/214
Inventor 孙浩然姚朝霞霍晓娜宋康林苏奔邵正鹏
Owner LYNCWELL INNOVATION INTELLIGENT SYST ZHEJIANG CO LTD
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