My Camera !

How web broadcasting works

Webcams are those handy little cameras that attach to your PC and send images to a web page that can be viewed by others. This enables you to share daily life events with friends and family in other parts of the country or the world, or to arrange a video-conference with colleagues and maintain long distance relationships of all kinds. Of course the number of ways to use this technology is limited only by your imagination.

Web Cameras

But before you buy a webcam, it pays to understand a little about how the technology of broadcasting images over the Internet works. Of course, if you’re a full bottle on this already, you can skip this section and go straight to browsing the options on Myshopping.com.au where you can compare products and suppliers, their specifications and prices.

Webcams provide ‘real time’ images of people; places and events that can be viewed ‘live’ on a web page. The broadcasting end has a camera that captures the images, feeds them into a computer to an ISP and out to viewing pages across the Internet. There are two different types of broadcast: streaming images, where the images are a constant stream downloaded in video format; or Java, where the images are captured at fixed time intervals and refreshed on the web pages at a rate fixed by the broadcaster.

The Applications - What are you intending to broadcast, and to whom?

There is a wide range of uses of webcam technology. Some examples include personal ‘Big Brother’ style diaries, sharing of family events, workplace security, video conferencing, virtual tourism, road traffic management, weather watching, event broadcast and a host of others.

Before you make a choice about any webcam equipment, it helps to decide exactly how you want to use the technology, in other words, what you are intending to broadcast. This decision will impact upon the type of camera you use, and how you use it.

A second consideration is, who will be viewing your content? What level of quality is expected? This will help determine the type of camera you use, the software involved and your Internet connection. Of course, your Internet connection may be a limitation on how much you can do.

The requirements for video conferencing are different from the requirements of workplace security, which are different again from the requirements of sharing a family event.

The physical components

There are a number of physical components required to make web cam technology work. At the top of the list is the camera itself. Then, depending on the type of camera you use and the way in which you want to deliver the content to the Internet, you may need to incorporate video capture hardware in your computer. Some software is required to help you process the data, and Internet connection is required and a web page into which the data is fed.

CAMERA CHOICES

Your choice of camera depends somewhat on what you are intending to show. If you need to reach a large public audience yo may want good quality camcorder or megapixel camera that captures high quality images. If it’s just for seeing who’s at your front door or keeping an eye on the kids in their playroom, then it may not need to present high quality images. If you are intending to use it outdoors, it will need to be weather proof and you may need to consider sun and UV protection. Available power supply and any robotic requirements for camera movement and focus are extra considerations.

Dedicated webcams

The most basic webcams connect to a PC using a simple USB connection. A wide range of cameras with accompanying software at a range of prices is available for this type of application. Simply search though Myshopping.com.au to compare prices and specifications. Dedicated webcams are simple to install and easy to use, but come with limitations that affect the quality of the images, such as low number of frames per second (refresh rates) and resolution (pixels per inch).

Camcorders and security cameras

Higher quality images and more camera control come from using camcorder and security cameras. To use these devices you will need to add a video capture card to your PC. Once you have that installed however, you can use a wide range of cameras from broadcast cameras to miniature spy cameras. You can include variable lens options, filters for daylight and low light situations, as well as robotic controls for panning and focus adjustments. You can search through Myshopping.com.au for camcorder selections.

Integrated cameras

An integrated camera combines the camera and the optical hardware with a video server, and as such requires no additional software. They can be used in network situations or as stand-alone devices for monitoring progress on a construction project for example.

Megapixel cameras

Network megapixel cameras combine network capability with high quality digital camera technology. These cameras offer excellent quality but this creates large files sizes, therefore they have limited application in constant streaming video. However for interval refreshed archive image collection, they are ideal, providing a constant record and high quality. You can search through Myshopping.com.au for digital camera selections.

SOFTWARE

If you are not using an integrated camera solution, you will need to install an encoding program like Webcaster or MediaCaster to transfer your images to a web page.

At the receiver end, when web surfers browse the internet and wish to view live video on the web for the first time, they will need to download dedicated applications that show the content such as an ActiveX control, Windows Media player, Flash player or the like.

INTERNET CONNECTION

Finally, you need an Internet connection. The hardware you will need may include a modem for dial-up connection, or modem/router for a broadband solution. Naturally the higher the quality you want, or the faster refresh rate you want, the more bandwidth you will need. ADSL (Broadband) is going to offer you the best solution, but keep in mind what your Internet connection when you are making choices of cameras and feeder software.

Webcam applications work well with wireless solutions. Make sure when you are purchasing a camera or network video solution that it is compatible with any wireless system you may be using in a LAN.

Key considerations

The specifications that are variable with webcam applications, and are affected by camera type, web interface and Internet connection, include the number of frames per second and the image resolution.

Frames-per-second is the number of times a still image flashes by in a second to give the appearance of moving pictures. In Australia, the standard television PAL format is at 25 frames per second. A webcam with up to 30 frames per second will show normal video images. But the more frames per second you demand, the more bandwidth, memory and processing power is required.

Resolution is measured the number of pixels per inch. High quality photographs require a high resolution. But the standard for web images is a low 72 dpi. Higher resolution images will not be of any better visual quality, just slower to upload and download.

Use Myshopping.com.au to compare different webcams, camcorders and digital cameras. You can compare the prices and specifications of the different products and brands, and a wide range of reputable vendors.

Andrew Gates is a writer for comparison online shopping site MyShopping.com.au. MyShopping.com.au helps you compare web cameras and buy online from top-rated online stores. You can also read webcams reviews and specifications.

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Your home could be your most precious property. It can be compared to a castle as the saying goes. However, homes today do not normally feature moats, drawbridges, six foot thick stone walls and ramparts. These serve as your primary defenses to those unwanted visitors.

Nowadays, house alarms or home security systems are preferably needed to ensure the house security from burglars and criminals. Installing a home security system can improve the safety of your family and property.

Another efficient device that is in demand nowadays is the burglar alarm system. These safety alarms are featured as electronic devices that have sensors. They are connected to a main control panel through either a low voltage narrowband RF signal or hardwire. When a connection is made between the unit and the signal, it can create an announcing alarm leading for an elicit response.

The most common burglar alarm sensors can indicate the opening of a window or door. The new designed systems are predominantly hardwired for economic purposes. While the retrofit wireless systems can also be more economical and are quicker to set up.

As for burglar alarm systems, you can find systems that are dedicated to a particular purpose only. Others also handle intrusion, handle fire, and are for safety alarms simultaneously.

Designs and features may range from small to built-in noisemakers. There are also those complicated hi-tech designs with multi-zoned computer based systems and monitoring outputs. Many of these conceptualized designs may apply to portable alarms for protecting your house and vehicles.

Efficiency of burglar alarms depends on the zone triggered, number of zones, time of the day and other aspects installed within the monitoring system. These systems can initiate various actions or can be instructed to call the police department, fire department and ambulances immediately. Others can also call the property supervisor to try to determine if the alarm is true and genuine.

Other functions may also include calling a list of telephone numbers provided by the owner to contact listed persons to go and check the secured premises. Some zones can make calls to the local oil heating company to go to inspect the system or to contact the owner with specific details of which area are getting flooded. You may also find burglar alarm systems that are attached to a video surveillance system so that monitoring can be instantly played on a remote monitor.

The desired result you seek from a burglar alarm system is to cause a specific alarm output and response quickly when the sensors identify a valid condition that may have triggered the alarm. The ability of the unit to communicate back to the monitoring system is one crucial aspect to the monitoring efficiency of the alarm made.

Some insurance companies and local government agencies may require alarm systems be installed with codes. They should also acquire certification from a third party organization that inspects the efficiency and quality of these alarm systems. Those with independent certifications should ensure that their system meets the level of qualifications beyond what the dealer promotes and offers. This will only ensure that you have an alarm system that is reliable, efficient and made of high quality.

Dave Poon is an accomplished writer who specializes in
the latest in Alarm Security Systems. For more information
regarding Burglar Alarm Systems please drop by at http://www.alarmsystemworld.com/

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Photography helps us capture memories; it allows us to
unleash our creativity. Even the most mundane subject can
become beautiful from the right angle. If this is what
photography does for us, what makes the difference between
a pro and an amateur?

For the most part the difference can be summed up in one
word: composition. Composition is the way in which a shot
is made as well as the subject of the photograph.
Composition almost wholly determines the popularity and
influence of a photograph.

A great photograph is a work of art; it evokes an emotion
from the viewer. The way you portray a scene, the
composition, is the way a viewer will experience the scene.

To create a beautiful work of art in a photograph, it
helps to have a plan, some emotion, or impact that you want
the picture to have. This will affect the way you shoot the
scene as well as the way viewers will eventually experience
it. Share your emotions with your viewers through your
photograph.

Professional photographers successfully draw on feelings
and memories that are common to everyone. Scenes
representing childhood, lost innocence, or connection with
nature grab the attention of viewers, reminding them of
their own experiences. Using unique scenes to pull on
common emotions allows a photographer to attract a wide
variety of people who respond powerfully to the photographs.

For a truly wonderful photograph, you must also consider
the way the parts interrelate with the whole that you are
trying to create. Proximity to the foreground often
determines what is considered the most important part of
the photograph.

In addition, the angle from which the photograph is taken
can greatly influence the viewer’s understanding and
emotional reaction. A normal, everyday item shot from a new
angle can totally readjust a viewer’s paradigm. Also,
combining different textures enhances the overall effect
and interest of a photograph.

True photography is not a point-and-shoot kind of thing.
Thought and care must be taken with each photograph, and
the viewer’s perspective is often the most important
consideration.

Photography is like poetry; both the subject and the form
determine the effect on viewers. As you search to take the
great photographs of your life, remember that your job is
to make viewers think, to help them see something from a
new perspective.

As a studio photographer, Margaret Byrkit has made a study
of topics related to photography. She is contributing
writer of articles for FYN Photography a
premier resource on-line for information on photography.
Find additional articles by Margaret at For Camera and FD Electronics

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