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As you can see, the formula to arrive at both descriptions of resolution are exactly the same, just described differently.
HD webcams, or webcams that are described in terms of 720p or 1080p resolution, have an aspect ratio of 16:9, which is a widescreen view.Photo Interpolation You may notice that a webcam may not have great video quality but is still able to take high quality photos.This doesn't necessarily have anything to do with the webcam itself.Due to webcams falling in this grey area, there is no set standard for how to describe each webcam's capabilities.One webcam may be listed as 2.0 megapixels and another as 1080p.Megapixels Megapixels are an image quality descriptions usually associated with digital cameras.
Taking our last example of 1280x720, or 921,600 pixels, this would come to .9 megapixels (MP), or one megapixel if you round up (mega means one million).
Below, we cut through confusing tech jargon so you'll know exactly what each camera can do.
HD or High Definition 720p and 1080p are high-definition resolutions, with 1080p being the best available.
These are entry-level webcams that shoot video at a resolution of 640x480 pixels, or .3 megapixels or below.
This type of webcam comes from an early technology, whereas most high-definition webcams now have CMOS sensors.
VGA VGA is a sensor type that usually refers to 640x480 resolution, which is the same resolution of a standard definition television.