Development of Image-Analysis Technology with AI for Real-Time People-Detection and Tracking
2017年3月27日 - 5:28PM
JCN Newswire (英)
Hitachi, Ltd. (TSE:6501) today announced the development of a
detection and tracking technology using artificial intelligence
(AI) which can distinguish an individual in real-time using
features from over 100 categories of external characteristics such
as sex, color of clothing or carried items, and immediately detect
and track the person sought after individual. Using this
technology, it will be possible to detect a suspicious individual
or a lost child using information from eye-witness accounts to
detect a person fitting that description from public security
cameras set up in large facilities or city areas. Further, by
analyzing the entire image of the person detected, it will be
possible to follow the person from camera images where only the
rear-view is captured and the face cannot be seen, or the person is
captured from a distance. Hitachi will apply this technology to
wide-area security and surveillance systems(1) such as those in
public areas, contribute to public safety and security.
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Wide-area people-tracking system using this technology
To ensure safety, measures such as surveillance using security
cameras and patrol by security staff are being implemented in
public areas such as city areas and large facilities such as
airports and stations. In order to prevent emergencies, however, it
is necessary to be able to immediately close-in on images of a
suspicious person or a lost child based on eye-witness accounts
from persons on the scene, and locate in real-time the whereabouts
of the person sought after from the wide-area surveillance camera
network. As it is difficult to screen all of the images with a
limited number of staff, technology to detect and track people has
been developed using facial images procured at some entry point or
features such as color of clothing, however it was difficult to
detect and track a person if there was limited eye-witness account,
other people wearing similar color clothing, or if the surveillance
camera was unable to capture a clear facial image due to angle or
lighting.
To overcome this challenge, Hitachi applied AI to distinguish an
individual in real-time using multiple features such as sex, age
group and clothing, and furthermore, track that individual in real
time from the images from wide-area surveillance cameras. Features
of the technology developed are as below:
1. High-speed person detection technology that categorizes and
searches using characteristics of external appearance and
movement
AI that can perform real-time simultaneous detection to identify
from camera images, more than 100 characteristics related to 12
types of appearance such as sex, age, hair style, color and form of
clothing, and carried items, and movement characteristics from 10
categories such as walking, running, and bending. Conventionally,
each item needed to be calculated separately to distinguish the
characteristics. This time, a method to simultaneous calculate
multiple items has been adopted, reducing calculation time to
1/40th(2). As a result, by providing specific conditions based on
characteristics categorized in real-time by AI, high-speed
detection of an individual is now possible.
2. High speed person tracking technology that analyzes in detail
the entire image of the body and extracts images of the same
person
AI that recognizes an individual as the same person by analyzing
and converting the image of the entire body into a numerical
description so that the same person will be recognized regardless
of a change in body angle or lighting. By recording the result of
the AI analysis in a database(3) with high-speed vector processing
developed by Hitachi, an image of the same person can be extracted
from among several ten thousands of recorded images in less than 1
second. Further, over a three-fold improvement(2) in accuracy of
obtaining an image of the same person, was found when the AI
developed was compared with that of facial analysis only.
Real-time people detection and tracking was made possible by
combining the technologies developed. From now, Hitachi will apply
this technology to wide-area security and surveillance systems such
as those in public areas, contribute to public safety and
security.
(1) In installing such technology, sufficient discussion will be
held with the customer to ensure measures that are introduced to
protect personal information and privacy.
(2) Comparison with conventional Hitachi technology.
(3) "EnraEnra" database, a high-speed similar image search
technology developed by Hitachi.
About Hitachi, Ltd.
Hitachi, Ltd. (TSE:6501), headquartered in Tokyo, Japan, delivers
innovations that answer society's challenges with our talented team
and proven experience in global markets. The company's consolidated
revenues for fiscal 2014 (ended March 31, 2015) totaled 9,761
billion yen ($81.3 billion). Hitachi is focusing more than ever on
the Social Innovation Business, which includes power &
infrastructure systems, information & telecommunication
systems, construction machinery, high functional materials &
components, automotive systems, healthcare and others. For more
information on Hitachi, please visit the company's website at
www.hitachi.com.
Source: Hitachi, Ltd.
Contact:
Hitachi Ltd
Corporate Communications
Tel: +81-3-3258-1111
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