Rabu, 26 Februari 2014

How can I use my webcam as a security camera?




bablyon_20


Hi;
I'd like to be able to use my webcam to take a picture when it detects motion within it's field of vision, and send it to an email address - something similar to Mugshot, (except that doesnt support authenticated SMTP by the looks of it, unless by request). Does anyone out there know of any similar product?



Answer
IP surveillance technology has reached one of those "perfect storm" moments. Today's digital cameras are inexpensive and easy to install. Wired and wireless networks alike are ubiquitous. And the camera-monitoring software is robust, easy-to-use and often free. Demand for security cams is high among both businesses and home users, and system builders stand to capitalize on this surging wave by offering installation services and support. There's even potential for computer and server upgrades, as some companies will be looking to build dedicated systems that have guaranteed bandwidth and quality of service (QoS) over the video network.
Cameras are popping up all over the place. You can find them at retail businesses, factory floors, homes, apartments, landmarks, schools, financial institutions and transportation centers, to name but a few. Applications range from basic security and safety to quality control monitoring.

Although you can use these cameras over the Web, they're not really Webcams, which are those small, low-tech cameras designed for online socializing. Rather, IP-based cameras connect directly to IP networks, record at higher frame rates, and generally have better resolution then Webcams. They can pan, tilt and zoom, and many have one-way or two-way audio capabilities. They also come with monitoring and management software that lets you trigger alarms and e-mail alerts when certain events occur. For example, you can designate motion detection areas within a frame that generate alerts when motion occurs. Or you can set the system to begin recording when certain events occur or timers are set. Examples of motion events might include a person walking into the frame or a car driving across a designated area.

Since these systems are IP-based, you can monitor, store, and archive video, audio and associated application data over the Internet or across private data networks. The video can be carried anywhere the IP network extends, as opposed to closed-circuit television (CCTV) systems that require proprietary equipment and dedicated coaxial cabling. Anyone with the proper security clearance and a standard browser can monitor video, and control and configure the cameras on the network.

You need to have a fairly robust wired or wireless network set up for a successful IP surveillance roll-out. This Recipe assumes that you have a typical 10/100 wired or 802.11g wireless network already set up. We will, however, look at some Power over Ethernet (PoE) networking equipment and discuss the advantages of that type of system as well. PoE allows you to send power over ethernet lines so you don't have to place the cameras near power sources.

Finally, a note on what all this will cost you. Simply put, pricing will depend on several factors you'll need to carefully consider: Labor rates, the camera(s) selected, the structure of the building(s), the location of power outlets, the location of network infrastructure, etc.

Big Benefits

A quick rundown of the main benefits of IP surveillance follows. Use these points when pitching solutions to your customers, and they will quickly recognize the advantages.


â¢Utilizes existing IP infrastructure.
â¢Highly scalable.
â¢Flexible camera placement: PoE eliminates need for local power source; Wi-Fi eliminates need for hard-wired ethernet cable. Wi-Fi stands for Wireless Fidelity, and Wi-Fi is pretty much a noun these days, and has even become synonymous with the more generic term "wireless."
â¢Remote viewing from anywhere/anytime via a standard Web browser.
â¢Standards-based, allowing multi-vendor solutions and integration.
â¢Better image quality than closed circuit TV (CCTV) analog systems.
â¢Open storage and server systems scale easily and cheaply, with no need for specialized recording equipment or training.
â¢Secure: Data can be encrypted across the network, so only the cameras and servers know what kind of packets to expect across the system. Without the proper authentication keys, outsiders can't break into the network to steal video data or feed false video into the system. Also, any interruption to the data stream can automatically trigger alarms and alerts.
Ingredients

Let's get into the two main areas of componentsâthe cameras and the networkâthat we'll need for building out an IP camera surveillance system.

Cameras: Most professionals are deploying products from D-Link of Fountain Valley, California. The company has been around for 20 years, and it offers quality cameras at reasonable prices. I recommend them.

I tested D-Link's DCS-6620G, DCS-5300G, DCS-3220G, DCS-2120 and DCS-950G cameras. I've listed them in order from fully featured to bare-bones. The DSC-6620G is the deluxe model, with all the ......MORE http://www.crn.com/white-box/192202279;jsessionid=QHVPJ5ULF1U3ZQE1GHOSKH4ATMY32JVN?pgno=2

how does a wirelass sequity camera work.?




gustim


and could it send the signal through a hedge?
thanx



Answer
A wireless security camera sends it's video signal via a TRANSMITTER, to a RECEIVER which is connected to whatever you use to record or monitor the camera's view. They are used in applications where it is DIFFICULT or IMPRACTICAL to run a video cable. (Remember that when using a wireless system, it may be possible for your neighbors to pick up your camera's signal too.)

Many "wireless" security cameras require connection to a power supply and only the video output is wirelss, and others may be COMPLETELY "wirelss," using a battery to supply power. The battery operated types are often used for short term or temporary applications.

Depending on particular needs you can have a camera with the transmitter BUILT-IN, or it could be a separate transmitter and receiver set called a VIDEO LINK. (Some systems will wirelessly send AUDIO as well as the VIDEO signal, and some more expensive types will even operate in total darkness using infrared illuminators.)(A WIDE RANGE of equipment is available)

Although transmitting through a hedge may WEAKEN the transmitted signal, most good quality wireless camera systems, are robust enough, to still produce a good signal. Frequently some EXPERIMENTATION with the placement of the camera and receiver will be required for best signal strength, provided you are not trying to transmit too great a distance. For transmission "through a hedge" you will get better results with the lower frequencies, as they will better penetrate the bushes.

I have provided some links for you to look at various kinds of wireless security camera equipment.




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