Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

"Smart" Surveillance System May Tag Suspicious or Lost People

19.12.2008
Engineers here are developing a computerized surveillance system that, when completed, will attempt to recognize whether a person on the street is acting suspiciously or appears to be lost.

Intelligent video cameras, large video screens, and geo-referencing software are among the technologies that will soon be available to law enforcement and security agencies.

In the recent Proceedings of the 2008 IEEE Conference on Advanced Video and Signal Based Surveillance, James W. Davis and doctoral student Karthik Sankaranarayanan report that they've completed the first three phases of the project: they have one software algorithm that creates a wide-angle video panorama of a street scene, another that maps the panorama onto a high-resolution aerial image of the scene, and a method for actively tracking a selected target.

The ultimate goal is a networked system of “smart” video cameras that will let surveillance officers observe a wide area quickly and efficiently. Computers will carry much of the workload.

"In my lab, we've always tried to develop technologies that would improve officers' situational awareness, and now we want to give that same kind of awareness to computers," said Davis, an associate professor of computer science and engineering at Ohio State University.

The research isn't meant to gather specific information about individuals, he explained.

"In our research, we care what you do, not who you are. We aim to analyze and model the behavior patterns of people and vehicles moving through the scene, rather than attempting to determine the identity of people. We are trying to automatically learn what typical activity patterns exist in the monitored area, and then have the system look for atypical patterns that may signal a person of interest -- perhaps someone engaging in nefarious behavior or a person in need of help."

The first piece of software expands the small field of view that traditional pan-tilt-zoom security cameras offer.

When surveillance operators look through one of these video cameras, they get only a tiny image -- what some refer to as a "soda straw" view of the world. As they move the camera around, they can easily lose a sense of where they are looking within a larger context.

The Ohio State software takes a series of snapshots from every direction within a camera's field of view, and combines them into a seamless panorama.

Commercially available software can turn overlapping photographs into a flat panorama, Davis explained. But this new software creates a 360-degree high-resolution view of a camera's whole viewspace, as if someone were looking at the entire scene at once. The view resembles that of a large fish-eye lens.

The fish-eye view isn't a live video image; it takes a few minutes to produce. But once it's displayed on a computer screen, operators can click a mouse anywhere within it, and the camera will pan and tilt to that location for a live shot.

Or, they could draw a line on the screen, and the camera will orient along that particular route -- down a certain street, for instance. Davis and his team are also looking to add touch-screen capability to the system.

A second piece of software maps locations within the fish-eye view onto an aerial map of the scene, such as a detailed Google map. A computer can use this information to calculate where the viewspaces of all the security cameras in an area overlap. Then it can determine the geo-referenced coordinates -- latitude and longitude -- of each ground pixel in the panorama image.

In the third software component, the combination map/panorama is used for tracking. As a person walks across a scene, the computer can calculate exactly where the person is on the panorama and aerial map. That information can then be used to instruct a camera to follow him or her automatically using the camera’s pan-and-tilt control. With this system, it will be possible for the computer to “hand-off” the tracking task between cameras as the person moves in and out of view of different cameras.

"That's the advantage of linking all the cameras together in one system -- you could follow a person's trajectory seamlessly," Davis said.

His team is now working on the next step in the research: determining who should be followed.

The system won't rely on traditional profiling methods, he said. A person's race or sex or general appearance won't matter. What will matter is where the person goes, and what they do.

"If you're doing something strange, we want to be able to detect that, and figure out what's going on," he said.

To first determine what constitutes normal behavior, they plan to follow the paths of many people who walk through a particular scene over a long period of time. A line tracing each person's trajectory will be saved to a database.

"You can imagine that over a few months, you're going to start to pick up where people tend to go at certain times of day -- trends," he said.

People who stop in an unusual spot or leave behind an object like a package or book bag might be considered suspicious by law enforcement.

But Davis has always wanted to see if this technology could find lost or confused people. He suspects that it can, since he can easily pick out lost people himself, while he watches video footage from the experimental camera system that surrounds his building at Ohio State.

It never fails -- during the first week of fall quarter, as most students hurry directly to class, some will circle the space between buildings. They'll stop, maybe look around, and turn back and forth a lot.

"Humans can pick out a lost person really well," he said. "I believe you could build an algorithm that would also be able to do it."

He's now looking into the possibility of deploying a large test system around the state of Ohio using their research. Here law enforcement could link video cameras around the major cities, map video panoramas to publicly available aerial maps (such as those maintained by the Ohio Geographically Referenced Information Program), and use their software to provide a higher level of “location awareness” for surveillance.

Three Ohio State students are currently working on this project. Doctoral student Karthik Sankaranarayanan is funded by the National Science Foundation. And two undergraduate students -- Matthew Nedrich and Karl Salva -- are funded by the Air Force Research Laboratory.

Contact: James W. Davis, (614) 292-1553; Davis.1719@osu.edu

Pam Frost Gorder | Newswise Science News
Further information:
http://www.osu.edu

More articles from Information Technology:

nachricht New technology enables 5-D imaging in live animals, humans
16.01.2017 | University of Southern California

nachricht Fraunhofer FIT announces CloudTeams collaborative software development platform – join it for free
10.01.2017 | Fraunhofer-Institut für Angewandte Informationstechnik FIT

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Multiregional brain on a chip

16.01.2017 | Power and Electrical Engineering

New technology enables 5-D imaging in live animals, humans

16.01.2017 | Information Technology

Researchers develop environmentally friendly soy air filter

16.01.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>