Definition: Effective resolution
is the measurement of the total number of pixels that a digital camera's image sensor uses to actually collect data about a photograph. Contrast effective resolution with overall resolution
, which is the measurement of the number of pixels the image sensor contains. However, not every pixel on an image sensor is used to collect data about a photograph.
Digital camera resolution is expressed in megapixels, which are millions of pixels. In a listing of digital camera specifications, you'll probably see both overall and effective resolution measurements. Effective pixels, or effective resolution, is the more useful number.
Also Known As: resolution