Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting head and shoulders of pedestrian in video based on overhead pixel gradient direction

A technology of gradient direction and detection method, applied in the field of pedestrian head and shoulder detection in video, can solve the problems of low efficiency, low precision and high missed detection rate, and achieve the effect of improving accuracy, solving low efficiency and improving efficiency

Active Publication Date: 2013-09-18
TAIYUAN UNIV OF TECH
View PDF5 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low efficiency, high missed detection rate and low precision in the existing video pedestrian detection method, the present invention provides a pedestrian head and shoulder detection method based on the gradient direction of the top pixel point in the video

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for detecting head and shoulders of pedestrian in video based on overhead pixel gradient direction
  • Method for detecting head and shoulders of pedestrian in video based on overhead pixel gradient direction
  • Method for detecting head and shoulders of pedestrian in video based on overhead pixel gradient direction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] Figure 4 It is a frame of image in a video shot by a camera, the frame rate of the video is 25f / s (frame / second), and the resolution is 320×240.

[0039] A pedestrian head and shoulder detection method based on the gradient direction of the top pixel point in a video, comprising the following steps:

[0040] (1) In the training sample, extract the HOG feature of the head and shoulders sample and the HSV color feature of the head sample, and use the SVM machine learning classifier to train and generate the head and shoulders SVM classifier, as follows:

[0041] The training samples required to train the classifier come from the publicly available MIT and INRIA pedestrian databases (http: / / cbcl.mit.edu / software-datasets / PedestrianData.html, http: / / pascal.inrialpes.fr / data / human) . The head and shoulders and the head of pedestrians are...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of video image processing, in particular to a method for detecting the head and the shoulders of a pedestrian in a video, and solves the problems of inefficiency, high undetected rates and low accuracy existed in a conventional method for detecting the pedestrian in the video. The method for detecting the head and the shoulders of the pedestrian in the video based on an overhead pixel gradient direction includes subjecting a scene in the video to background modeling by adopting an averaging method, and extracting a front scene of a video image; finding out an overhead candidate point by utilizing an feature that the overhead pixel gradient direction is provided with a fixed range, calculating sizes and locations of the head and the shoulders as a to-be-detected window of the head and the shoulders of the pedestrian according to a coordinate of the overhead candidate point; extracting an HOG (histogram of oriented gradient) feature and an HSV (hue, saturation, value) color feature and inputting the same into a classifier to detect whether the to-be-detected window is about the head and the shoulders of the pedestrian or not, so that the undetected rates caused by the fact that the pedestrian's body is blocked is reduced.

Description

technical field [0001] The invention relates to the technical field of video image processing, in particular to a method for detecting the head and shoulders of a pedestrian in a video. Background technique [0002] Pedestrian detection in video surveillance scenes plays an important role in assisted driving, security monitoring, passenger flow statistics, etc., because pedestrian detection is the basis of important technologies such as tracking and recognition. Due to the problems of different postures of pedestrians, occlusion of the human body, sudden changes in illumination, and disturbance of the background environment in practical application scenarios, how to quickly and accurately detect pedestrians in videos with complex backgrounds is still a focus and difficulty in the field of video image processing technology. . [0003] Existing video pedestrian detection methods are mainly divided into three aspects: based on motion information, based on model matching and ba...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
Inventor 谢刚阎高伟赵哲峰谢珺钦爽饶钦
Owner TAIYUAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com