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It Is Time to Buy a Webcam

Posted by admin on August 24, 2015
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A WebCam, or Web Camera is a video camera that is used to capture real time video images and pass them via a computer to a computer network. The most popular use for a webcam is to set up video conferencing across the Internet amongst friends and family. A lot of modern Notebooks or Laptops come with a web camera already built-in.

This type of network camera is distinct from a network video surveillance device that is used to provide real time images that can be monitored for security purposes. These type of video cameras tend to be more expensive because they have a number of features for playback and storage, and often have to be protected against the weather.

The webcam was first developed within Cambridge university in 1991 in the Science department, with the purpose of allowing lecturers and graduates to view the Trojan Room Coffee Pot, and determine how busy it was before going to order coffee. It wasn’t long before the first commercial devices were ready for the market and eventually Logitech became the biggest producer of webcams.

With the proliferation of instant messaging and Voice over IP (VoIP), many millions of people with connections to the Internet want to communicate with friends and relatives worldwide. Skype has become on of the most popular multimedia Internet communications systems on the Internet, and it all started with simple telephony, but now has added features such as video and chat. So now you can talk to your friends worldwide and view a live image of them as you do so provided you have some kind of web camera attached to your PC.

Most webcams comprise a camera lens and an image sensor, rather like a standard digital camera, with a lot of webcams now having a built-in microphone. The cheaper models come with a decent quality fixed focus lens to ensure a good quality image. Most commercial low-cost web cameras incorporate a CMOS (Complementary Metal Oxide Semiconductor) image sensor which converts light energy into a voltage, which is then converted to some digital format. CMOS image sensors are fairly cheap to manufacture, hence the reason they have become popular in webcam technology. The alternative is to use a CCD (Charge Coupled Device), but these tend to be a little more expensive to manufacture and the image quality is very similar for both devices.

Most webcams are connected to a computer by means of a USB cable, unless otherwise integrated with the computer, but this is mainly with recent Notebooks and Laptops. A development known as the USB Video Device Class, or UVC for short, allows webcams to be integrated with computers, and usually doesn’t require the use of specific vendor specific device drivers. All the major operating systems such as Windows, Linux and Mac OS support this UVC standard. All this makes it easy for a user with no technical knowledge to install and run a webcam quickly and efficiently.

As well as using a webcam for simple communications, many people today also use them to produce low-cost video images for use on social websites such as YouTube. Another area where they are used extensively is online dating sites where men and women can view potential dates rather than just rely on still photographs.

It is important to note that images passed from webcams via computers are utilising some form of computer application, and all computer applications are subject to attack from hackers and mischief makers, particularly on the Internet. For this reason security is just as important for your Webcam application as it is for others such as email and other forms of file transfer. Hackers can use a variety of methods such as Trojan Horse Viruses to activate a webcam, so it is very important to make sure your Internet Security programs are up to date. If you purchase a webcam, then a useful feature to look for are LED indicators, to let you know when the device is live. This will warn you to switch off your webcam when not in use and also warn you when a webcam may be been remotely switched on by a hacker. Webcams are just as safe as any other computer device if you follow the security rules and always keep your anti spyware and anti virus software up to date.

A web camera is generally a low cost device and there are many outlets where you can purchase one of these devices. Many are purchased directly from online Internet retailers and I would recommend doing a little research before purchasing to ensure you are getting the right device, not just in terms of performance, but also in terms of additional features and methods used to attach the physical device to an existing computer or desk. Although most webcams are attached via USB cables, there are many now that allow connection via WiFi or Bluetooth too.


Posted by admin on August 24, 2015
Posted in Uncategorized 



There are different criteria that determine the effectiveness of a good mouse. Normally, the “superior” mice are better than the standard mice in basically each of these aspects. These criteria include: acceleration, lift off distance, prediction, tracking speed, lag, smoothing, jitter, smoothing, pixel walk, pixel skipping and a few others. In this article, we shall focus on superior sensors.

Mice are typically marketed as being one of optical or laser sensor mice. These terms refer to the manner in which the sensors track the mice’s movements. Both types of mice work in more or less a similar manner. Optical mice are lit with a light emitting diode (or an LED). Laser mice are lit with infrared laser diodes. So, essentially, the main difference between these mice is the way in which they are illuminated underneath the sensor. Another difference, the most important difference of all, is the way that the two different types of mice perform. Since laser sensor mice make use of newer and better technology, they are generally regarded as better. They are able to achieve a much higher DPI than optical mice can. These are the reasons people usually refer to when they say that laser sensor mice are better than optical mice. But, are they right?

There are many fundamental differences between laser sensor mice and optical mice. This is not to say that one is better than the other. That superiority is a matter of opinion. One difference, for example, is that one type of mouse works well on one surface and poorly on another, as opposed to the other type. For instance, a mouse with an optical sensor will track better on mouse pads and other types of cloth whereas a mouse with a laser sensor will track better on surfaces such as glass and polished wood.

Optical sensors can be regarded as superior when it comes to their reliability and tracking accuracy. Many laser sensors have issues with acceleration—though the newer ones have improved on that front.

Optical lasers are also superior in their tracking speed. Typically this is what gives them the edge over laser sensor mice. Not all laser sensors experience this problem. Usually it depends on the brand (and hence the technology used in the mouse). Some laser sensors do not have this problem at all. Instead, they face another issue; the z-axis problem. The z-axis problem is when a mouse faces an issue when it is lifted. When the mouse is lifted off the surfaces, the cursor on your computer screen should not move. However, some of these mice have this problem (the cursor moves when it is lifted). If you are used to lifting your mouse so as to stop tracking, you will face a big problem with such a sensor.

Not all mice with the same sensors have the same characteristics. Different brands use different technology. Or, if they use the same technology, they use them in different ways to come up with what they think will be the best mouse. There are some sensors that are used in different mice, yet produce totally different results. For instance, a sensor could be seen in a mouse renowned for its slow lift off distance and another renowned for its fast lift off distance. It all depends on how the manufacturer implements it.

So, not all mice with superior sensors are actually superior to the rest. The only way to know if a mouse is good for you is if you test it out yourself.

About Me

Posted by admin on August 24, 2015
Posted in Uncategorized 

Hey guys, Tertius Marcas here. If you should know, I started blogging the minute I finished school back in 2004. A 10 hour straight blogging by researching opened up my eyes and I have never stopped since. I have experienced working and living in Moscow, Russia, at a ripe age of 26 years old and being a writer at the Hanoi, Vietnam when I was 28 years old.