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Digital Camera A camera that takes pictures without film, and records the images in digital form. The camera stores the snapshots in its memory for transfer to a computer. Digital Darkroom A Macintosh photo editing program from Silicon Beach Software, Inc. Digital Watermark A watermark is a normally invisible pressure mark in expensive paper which can be seen when the paper is held up to the light. Some computer files have digital watermarks embedded in them as a pattern of bits which appear to be part of the file and are not noticeable to the user. These patterns can be used to detect unauthorized copies. Digital Zoom Electronic enlargement of image simulating optical zoom lens. The image is actually being cropped resulting in loss of surrounding pixels and thus resolution. DNS Domain Name System. DPI Dots-per-inch. Printers lay down multiple dots of ink when printing to reproduce each pixel of the image. The higher the dpi rating of the printer, the better it can define each pixel. Also a measurement of a scanner's resolution. Computer screens can see no more than 72 dpi. If you're working in a higher resolution than that while making Web graphics then you're wasting file size. The higher the resolution (dpi) the larger the file. DSP Abbreviation for Digital Signal Processor. A special-purpose micro-processor designed to handle signal-processing applications very quickly. DSPs are used in several classes of computer hardware, including sound cards, modems, telephony boards that handle sound and modem functions and hardware that handles audio and video compression in real time. DSP-based hardwares are chips from Analog Devices or IBM/TI that can be reprogrammed with microcode. DVD Digital versatile disc was originally referred to as digital video disc. These high-capacity optical discs are now used to store everything from massive application programs to full-length movies. It looks like a compact disc or a CD-ROM. A standard single-layer, single-sided DVD can store 4.7 GB of data. The two-layer standard boosts the single-sided capacity to 8.5 GB. DVDs can be double-sided, ramping up the maximum storage on a single dics to 17 GB. You need DVD drive to use DVDs. DVD drive will also read older CD-ROMs and audio CDs. Dye Sublimation A type of printing process in which a dye ribbon is heated by the print head creating a gas that hardens onto special paper. This creates soft-edged spots of color that melt into each other and give the appearance of a continuous tone photograph.

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