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The software that comes with the webcam is what digitally enhances the quality of the pictures. This doesn't necessarily have anything to do with the webcam itself. You may notice that a webcam may not have great video quality but is still able to take high-quality photos. (Image credit: Logitech) Photo Interpolation As you can see, the formula to arrive at both descriptions of resolution are exactly the same, just described differently. 9 megapixels (MP), or one megapixel if you round up (mega means one million). Taking our last example of 1280x720, or 921,600 pixels, this would come to. Megapixels are an image quality description usually associated with digital cameras.

The more pixels that can be progressively scanned onscreen, the better the video quality. A 720p television will progressively scan 921,600 pixels (1280x720) on the screen every 1/60 of a second - older CRT screens used interlacing (switching between odd and even lines every frame) but progressive scanning provides a better picture. For example, 720p really means 1280x720 pixels, where 1280 represents the number of horizontal pixels and 720 represents the number of vertical pixels. The 'p' is short for 'progressive scanning'. While this is now a common resolution for all the best TVs, is something you're probably not going to be managing with a simple webcam.

720p and 1080p are high-definition resolutions, with 1080p being the best available (and likely built into the best laptops) until you get to 4K Ultra High Definition.