Glossary of Digital Photography Terms – Part 2

Color balance – often refers to the modification of the color values of an image to generate the correct colors on a particular image display or printing device.
Filter – is a camera accessory, a glass or plastic disk with a metal or plastic ring frame, consisting of an optical filter (for different colors: green, blue, red, yellow) that can be inserted in the optical path.
Megapixels – millions of pixels (usually used in reference to the resolution of an image sensor).
Pixel – is a single point in a graphic image.
Optical zoom – uses the optics (lens) of the digital camera to move you closer to your subject.
Digital zoom – simply uses the existing image and enlarges it digitally.
Blur – generally refers to the appearance of an unfocused image.
Gaussian blur – is an effect used to reduce image noise and reduce detail levels.
Red-eye effect – is the common appearance of red eyes on photographs taken with a photographic flash when the flash is too close to the lens (like in compact cameras).
Multiple exposure – is an exposure in which the sensitivity to light is reduced and then increased at least once during the total exposure time.
Tripod – is a three-legged stand for a camera, used to stabilize and elevate the camera.
Vignetting – refers to a reduction in image brightness in the image periphery compared to the image center.