tracks down the latest in video systems. We look at the latest in object tracking, motion detection, image processing and video management.
As security cameras multiply, the ability for people to successfully monitor them declines. Commercial and public agencies are looking at monitoring hundreds of camera feeds with the minimum amount of staff. Many agencies are already surpassed their 1000th video camera install. How do agencies manage and store all that video? Let’s look at how some different techniques to manage video. Smart video systems are sold on the premise that one person can only do so much, and it’s cheaper to have a computer look at the video than the security guard. Simple, right? Well not really. Here we look at several techniques on the market that help you stretch your budget. You may not be able to replace that operator with a machine, but you may not need to hire that other operator. Ok, well that is not what you want to tell your staff, but essentially that is the goal…do more with less money.
Video motion detection… why do I need it? Digital motion detection is the processing of video images to detect differences between the video frames. Note this might not be actual motion, sometimes it could be that the camera was actually moved by wind or an intruder (like the intruder taking the camera!). But what normally happens is that objects in the scene move, and a system detects the changes. Then you can do two things. That video can be marked as “motion” video. The motion can also be setup to trigger an alarm, or other action…say for instance trigger the activation of other recording devices.
There are other uses. What about when you need to go through six hours of video to find the thief? This can make it easier to find scenes in the video where something happened. Or it could be used to delete video scenes where there was no motion. This could be part of an archive procedure to save disk space, only storing video with motion. So we can see that with digital video, motion detection saves money and time.
The only question is when do you want to do it? Since we assume all video is recorded, the motion detection can be done during the capture or later during the day or night when there are more computing resources available.
The only question is when do you want to do it? Since we assume all video is recorded, the motion detection can be done during the capture or later during the day or night when there are more computing resources available.
Object tracking, do I need it? Video object tracking, at its basic, is taking a video into a digital format (or converting analog video to digital), and having a computer process the image. This is similar to video motion detection, but more complex as you will see. The computer can look at objects, events, colors, light levels, anything in the video image that could be classified as an “object”. Object tracking is the ability of computers to track that object in the video. Think of a man walking in from of a camera, then walks out of the picture to the left. From watching the video, you know what happened, but with digital object tracking, a computer tracks the objects and can make certain assumptions without you looking at the video. Let’s talk about an application for video object tracking.
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