Unless you’ve been living beneath a rock for the last two years it’s tricky to escape the advent of hi-def technology that has been brought to video games, DVDs, TVs, digital camcorders and cameras. The elite of the crop currently is ‘full HD ‘, but why would you want to pay out for a full HD camera rather than a normal hi-def camera? Here’s why :

Full HD Camera vs . Ordinary HD Camera
The principle difference between a HD and a full HD camera is the number of pixels ( points of light ) the camera contains when it produces either a still or moving image. Just like with your TV set, digicams scan horizontal lines of pixels which produce an image for the eye. By enlarging the amount of lines of pixels, the pixel density is much bigger which creates a much sharper and clearer image.

To qualify as a standard Hi-D video camera, a product must be ’720 ‘, meaning there are 720 horizontal lines of pixels and 1280 vertical lines. A full HD camera will have 1080 horizontal lines and1920 vertical ones, explaining why there’s actually such a buzz around ’1080 ‘ technology – it is the highest resolution available in HD at the moment creating the clearest images.

Progressive Scanning vs. Interlaced Scanning
Having a high-res is all well and good but unless the pixels can be scanned quickly then the benefits of the resolution will be lost. ‘Scanning ‘ is how swiftly the image can be processed and displayed on a screen. Most standard cameras come with interlaced ‘i ‘ scanning, meaning that the image is drawn using swapping lines of pixels. The even lines will appear followed by the peculiar lines, which is often imperceptible to the eye as it fills in the blanks.

Progressive ‘p ‘ scanning , however , displays the full image all at the same time. A full HD camera with progressive scanning not only has the highest resolution, but can display that resolution all at once in a sustained sequence without the image flickering.

The bonus of progressive scanning is that the images keep their clearness even at quarter speed and can capture much better still stills from video frames. The mixed quality of 1080 pixel resolution and progressive scanning makes full HD a must-have for anybody serious about their digital cameras.

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