Glossary
Appendix
108
Digital zoom: Unlike optical zoom, digital zoom does not increase the amount of visible detail. Instead, details visible using optical zoom are simply enlarged, producing a slightly “grainy” image.
DPOF (Digital Print Order Format): A standard that allows pictures to be printed from “print orders” stored in internal memory or on a memory card. The information in the order includes the pictures to be printed and the number of copies of each picture.
EV (Exposure Value): The exposure value is determined by the sensitivity of the image sensor and the amount of light that enters the camera while the image sensor is exposed. Each time the amount of light doubles, EV increases by one; each time the amount of light is halved, EV decreases by one. The amount of light entering the camera can be controlled by adjusting aperture and shutter speed.
Exif Print: A standard that allows information stored with pictures to be used for optimal color reproduction during printing.
JPEG (Joint Photographic Experts Group): A compressed file format for color images. The higher the compression rate, the greater the loss of information and more noticeable drop in quality when the picture is displayed.
Motion JPEG: An AVI (Audio Video Interleave) format that stores sound and JPEG images in a single fi le. Motion JPEG fi les can be played in Windows Media Player (requires DirectX 8.0 or later) or QuickTime 3.0 or later.
Smear: A phenomenon specifi c to CCDs which causes white streaks to appear when very bright light sources, such as the sun or refl ected sunlight, appear in the frame.
WAV (Waveform Audio Format): A standard Windows audio file format. WAV files have the extension “*.WAV” and may be compressed or uncompressed. The camera uses uncompressed WAV. WAV fi les can be played using Windows Media Player or QuickTime 3.0 or later.
White balance: The human brain automatically adapts to changes in the color of light, with the result that objects that appear white under one light source still appear white when the color of the light source changes. Digital cameras can mimic this adjustment by processing images according to the color of the light source. This process is known as “white balance.”