On first glance, the images from the surveillance camera show two people as a pair of pixels, dark specks on a gray streetscape. Hair color, eye color, facial expressions and more were not visible in the series of pictures taken from an airplane flying two miles above. But with megapixel surveillance the images can show things in much more detail and spread over a larger area.
When it comes to surveillance, megapixel is the word. Alhough megapixel cameras cost more than lower-resolution cameras and require more storage for the higher-resolution video, in specific situations it makes more sense to invest in megapixel technology.