A CNN-based height determination method and system for barefoot or socks footprints

A technology for judging methods and footprints, applied in neural learning methods, instruments, biological neural network models, etc., can solve problems such as relying on personnel experience, achieve the effect of reducing the need for personnel experience and improving accuracy

Active Publication Date: 2020-12-15
DALIAN EVERSPRY SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the police field, traditional footprint-based height prediction models have large errors and rely heavily on personnel experience

Method used

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  • A CNN-based height determination method and system for barefoot or socks footprints
  • A CNN-based height determination method and system for barefoot or socks footprints
  • A CNN-based height determination method and system for barefoot or socks footprints

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Embodiment 1

[0044] This embodiment provides a method for judging the height of barefoot or socks-wearing footprints based on CNN, including:

[0045] S1: Preprocess the barefoot or socks footprint image;

[0046] A. Image correction of barefoot or socks footsteps: During the image acquisition process, the images are skewed due to the different positions of each person. Applying the PCA algorithm to correct the rotation of the barefoot gray image is figure 1 shown. First set a grayscale threshold θ, and then traverse each pixel of the grayscale image. If the grayscale value is greater than θ, store the position information of the pixel in the feature matrix, specifically a matrix with n rows and 2 columns , the value of n is equal to the number of pixels whose pixel value is greater than θ in the grayscale image, the first column represents the position information of the pixel, and the second column represents the position information. On this basis, two two-dimensional feature vector...

Embodiment 2

[0080] The second technical solution of the present application is: a plantar pressure visualization analysis system, comprising:

[0081] Image preprocessing module: preprocess barefoot or socks footprint images;

[0082] Classification module: classify the height segment of the preprocessed image;

[0083] The classification module includes:

[0084] Data discretization module: discretize height data; firstly, the distribution of male and female heights is very different, so the prediction model constructed will study males and females separately. Second, the population was grouped according to different height groups. In this embodiment, men are divided into five groups according to different height segments, and women are also divided into five groups. For people who are not in the following height category, the study will not be conducted temporarily, and the classification table is shown in Table 1.

[0085] The data set production module divides the preprocessed dat...

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Abstract

A CNN-based height determination method and system for barefoot or socks-wearing footprints, specifically comprising: S1: preprocessing barefoot or socks-wearing footprint images; The classification specifically includes: S21: discretize the height data; S22: create a data set; S23: build a height classification network; S24: judge height based on interval probability. This application greatly reduces the need for personnel experience in solving cases, liberates manpower, and greatly improves the accuracy of judgment.

Description

technical field [0001] The present invention relates to a height judging method and system, in particular to a CNN-based barefoot or socks-wearing height judging method and system. Background technique [0002] At present, there are many methods for measuring height, and the simplest is to use a ruler to measure directly. This measurement method requires manual operation to read the data. With the gradual development of measurement technology to digitalization, there has been a method of measuring human body height using ultrasound. The height is measured by the time difference after the reflected echo of the measured object is received. This requires the ultrasonic transmitter to be placed on the top of the head to achieve measurement. With the rapid development of image processing technology, there has been a method of measuring human body height using images, which has realized non-contact height measurement, but this requires the user to maintain a fixed distance from th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/32G06K9/34G06K9/62G06N3/08
CPCG06N3/08G06V40/10G06V10/243G06V10/267G06F18/2135G06F18/214G06F18/24
Inventor 张吉昌郭宝珠董波于昕晔
Owner DALIAN EVERSPRY SCI & TECH
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