Tag: CCD

Understanding The Role Of Megapixel In A Digital Camera

By awareness the function of megapixel in a digital camera, you will be able to buy the finest option at the cheapest rate. Even beginners will be able to opt a better camera.

Higher the megapixel count, better is photo-quality?

This is one of the most misunderstood impression about rating of digital camera and their photo excellence. Consider a mosaic of tiles, each megapixel is like a tile and a mosaic of these tiles make a picture clearer. That is all right, but it doesn’t mean that picture taken by a 10 or 12 or 50 megapixel camera will be more sharp than a 3 megapixel camera, because for most practical purposes, 3 megapixel quality is good enough. At the most you may require 6 – 8 megapixel for photo-quality as appears in magazines. Anything ahead of that isn’t of much use to a non-professional photographer.
One megapixel is like one tile. When a picture is taken, the CCD or CMOS sensor in the camera receives an array of such tiles to create an image. It then converts it to electrical signals which are processed to deliver a picture. An array of 2048*1536 generates a pixel count of 31,45,728 pixel which is amount to to 3.1 megapixel.

What affects the quality of pictures then?

The quality of the lens, the algorithms used to make the photo from raw data composed by the sensor and the focusing mechanism are some of the other factors that affect the final result.
It should also be considered, how large is the sensor in the camera. Consumer digital cameras have tiny image sensors. They are measured in microns. A micron is a millionth of a meter. Most sensors in consumer cameras are less than 10 microns. It is kept so so as to decrease the size of the camera so you can carry it in your pocket.

DSLR cameras have larger sensors. The main disadvantages of a smaller sensor is that it generate images with more noise than a large sensor. If you have to focus on a small area, it is difficult to do with a small sensor. Further, any shaking in handling the camera is blown up in a small sensor.

That means in right hand, with a appropriate sized sensor, a 6 MP camera is also good enough. In few scenarios a larger megapixel count may be useful, but for general purposes, it is not required.

In what scenario is a higher megapixel beneficial?

If you have to take the photograph of an airplane or a bird flying at a distance and you starting zooming with a digital camera, use digital zoom to reach it, the picture becomes granular. This is a typical defect of the digital zoom. In such a case, if you have a higher megapixel count, you won’t need the digital zoom.

Buy wisely choosing the appropriate megapixel rating you will be able to get a cheapest yet a better digital camera.

Security Camera Mysteries What Does 720p Mean

For those really into security systems that can handle serious levels of high technology, going with cameras that can capture an image and turn it into a high-definition display might be the way to go.

Prices of very nice kits have taken a hit recently, thanks to the entry of China wholesale security cameras suppliers. Typically, those kits feature video cameras capable of presenting images in what’s called 720p.

Now, most of what 720p has to do with is the resolution, or quality, of the picture that will be displayed on a monitor capable of converting that signal to high-definition pictures.

“720” stands for the 720 horizontal scan lines of display resolution. The “p” stands for “progressive scan,” though it’s sometimes also meant to mean “non-interlaced.”

Basically, 720p with its progressive scan lines can actually come much closer in terms of resolution to 1080i than most people might believe. It filters out flicker quite well and it’s fairly sharp because it because it works so well at preventing that screen flicker. 1080 is so-called “true” high-definition and the number refers to the number of scan lines (1,080 of them) while the “I” stands for “interlaced.”

“1080i” is the high-definition video mode, while high-def TVs usually feature 1080p, meaning that 1,080 horizontal scan lines are progressively scanned.

Both 720 and 1080 present pictures and displays that are generally superior to regular (or “standard definition”) footage across every measurable criteria.

At any rate, most security professionals rate the ability to deliver displays in high-definition to be a desirable element in any good system.

Keep in mind, though, that a system able to capture and then display images in high-def is going to cost more, sometimes by many hundreds of dollars.

If getting one, make sure all the cameras are either all “I” or all “p,” because the receiving equipment is only set up to handle one or the other.

These systems are considered, at present, to be the “gold standard” for home security kits.

Make sure any set being considered has a well-designed digital video recorder and security cameras that feature CCD (charge coupled devices) cameras that can make use of infra-red so that they can work well under all light conditions.

It’s important that all cameras and equipment be matched up to match the resolution capabilities of the cameras because a 720p and a 1080i set of cameras normally can’t be mixed together without a great deal of difficulty and a lot of adapter-type components.

Astak WL906D Weatherproof Night Vision Wireless CCD Color Camera

These cameras are now in high use and people are keen to install these cameras to ensure better home security. Homeland security cameras also help you keep an eye on your children at play time. These cameras considerably minimize risks of theft, robbery, burglary and other criminal offenses. The prices of these cameras are pretty cheap and these cameras are now also sold online.

There are different models if security cameras but Astak WL906D Weatherproof Night Vision Wireless CCD Color Camera is both good looking and functions well.

Weatherproof wireless CCD cameras are in high demand and this camera can be attached to the TV or VCR. Usually no wiring is required and it gets installed within just 5 minutes. Most of the wireless cameras come with sensitive microphones and provide audio-visual monitoring.

Many people prefer security systems but the security systems are often costly and people cannot afford it. For such people, Astak WL906D Weatherproof Night Vision Wireless CCD Color Camera is the ideal solution. Moreover, this is weatherproof and wireless. The price is also affordable. These CCD color cameras are widely available in Wall mart stores.

Individuals need to feel they have a secure home. Often for many reasons, measures of security remain lower that what should be done. This can lead to major crisis and unwanted hassle. So, precautionary measures are highly advisable. The Astak WL906D Weatherproof Night Vision Wireless CCD Color Cameras come with powerful Imaging Sensor of: 1/4-inch CCD. It takes hardly five minutes to complete the installation process. Overall weigh of the camera is 8 kgs and the dimension is Width x Length x Height = 44 x 44 x 56 mm.While purchasing any Weatherproof Night Vision Wireless CCD Color Camera, it is prudent to check the night vision range; the night vision range of this camera is 30 feet.

Astak WL906D Weatherproof Night Vision Wireless CCD Color Camera is indeed provides a fashionable look. The price usually ranges between $135 and $ 140.With a shutter speed of 1/50 – 1/10,000 second, the camera effectively monitors the front and the backyards of the home and ensures safety. Instead of being confused with the different home security cameras available in the market, it is prudent to rely upon this Astak manufactured camera.

Selection of a wrong CD camera can be just wastage of money, so vivid research can be of great use. There are different online articles on home security cameras and it is best to go through them to have a clear insight about these cameras. Performance of Astak WL906D Weatherproof Night Vision Wireless CCD Color Camera has been good and it is a reliable product. The prince of this CCD Camera is moderate compared to the other similar products available in the market.