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Image similarity calculation method based on improved SoftMax loss function

A loss function and image similarity technology, which is applied in the field of deep learning, can solve the problems that the recognition accuracy rate needs to be improved, and achieve the effect of avoiding low image recognition accuracy rate, strong image feature expression ability, and improving accuracy

Active Publication Date: 2018-12-07
CHINA JILIANG UNIV
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Problems solved by technology

The image recognition model trained with the deep neural network and the traditional Soft-Max loss function has a much higher recognition accuracy than the model trained by the traditional method, but the recognition accuracy still needs to be improved

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  • Image similarity calculation method based on improved SoftMax loss function
  • Image similarity calculation method based on improved SoftMax loss function
  • Image similarity calculation method based on improved SoftMax loss function

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing.

[0028] Such as figure 1 Shown is a schematic diagram of the image recognition network structure, and the image similarity calculation method based on the improved Soft-Max loss function of the present invention mainly includes the following steps:

[0029] Step (1): Prepare the image recognition training data set. The training data set is the open source image recognition database ImageNet 2012, including more than 1 million images of 1000 categories. The image recognition training data set is input to the convolutional neural network-based Start training in the image recognition network, and the image recognition network based on the convolutional neural network includes a convolutional layer, a maximum sampling layer, a fully connected layer, and four network layers of the improved Soft-Max layer, wherein a convolutional layer and A maximum sampling layer constitutes an ...

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Abstract

The invention discloses an image similarity calculation method based on an improved Soft-Max loss function. An activating function of the improved Soft-Max layer in an image identification network isan improved Soft-Max activation function. In a reverse propagation process, the improved Soft-Max loss function is utilized for updating a network weight. Compared with a traditional Soft-Max loss function, the improved Soft-Max loss function has an advantage of increasing a decision edge which is obtained through learning of an image identification network. In a testing period, a trained image identification model is utilized for performing characteristic vector extraction on two testing images, and cosine similarity between the characteristic vector is calculated. Compared with an image similarity threshold, if the cosine similarity is higher than or equal with the image similarity threshold, a fact that the two images are in the same kind is determined; and if the cosine similarity is lower than the image similarity threshold, a fact that the two images are in different kinds is determined.

Description

technical field [0001] The invention belongs to the field of deep learning for extracting image features by a deep neural network, relates to technologies such as neural networks and pattern recognition, and in particular relates to an image similarity calculation method based on an improved Soft-Max loss function. Background technique [0002] Image recognition technology is a research hotspot in artificial intelligence and pattern recognition today, and it is a biometric technology that identifies the objects in the image based on the observed image. It has a wide range of applications in aerospace, medicine, industrial automation, robotics, and military. [0003] With the development of science and technology, the scope of application of image recognition has been continuously expanded, and gradually extended from the field of public security criminal investigation to industrial neighborhoods, such as laser positioning cutting, positioning marking, and positioning welding...

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Application Information

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IPC IPC(8): G06K9/62G06K9/46G06N3/04G06N3/08
CPCG06N3/084G06V10/40G06N3/045G06F18/22
Inventor 章东平李建超
Owner CHINA JILIANG UNIV
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