• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Chapter 4. Resolution Solutions > Ben's Techno-Babble Decoder Ring

Ben's Techno-Babble Decoder Ring

Dots per inch (dpi): Determines the size of the dots an output device will use when printing an image. A 300dpi laser printer uses black dots that are 1/300 of an inch. This term is often used incorrectly to describe the resolution of an image (which should be measured in pixels per inch).

Downsample: To reduce the number of pixels that make up the width and/or height of an image without changing its general appearance (no cropping or adding of white space).

Dye sub: Short for dye sublimation. A type of output device that produces a continuous-tone result by heating CMY dyes until they turn into a gas (without first becoming a liquid). The output of a dye-sub printer has a continuous-tone glossy look that resembles a photographic print.

Imagesetter: A type of high-end output device that is used to output images onto photographic paper or film. Imagesetters are capable of outputting only pure black and pure white dots. The minimum resolution of an imagesetter is 2,540dpi.

Inkjet: A type of output device that sprays CMYK inks onto special paper. Upon close inspection, the output of an inkjet printer typically appears “noisy” because the printer uses a dither pattern to simulate shades of gray.

Lines per inch (lpi): Determines the spacing of halftone dots and therefore their maximum size. The higher the lines-per-inch setting, the more apparent detail you can reproduce.

Pixels per inch (ppi): Determines how small the pixels in an image will be when printed. A setting of 150ppi means that pixels will be 1/150 of an inch when printed. The higher the setting, the smaller the pixels.

Samples per inch (spi): Determines the area a scanner will measure to determine the color of a single pixel. You can figure out the samples-per-inch setting that you need by multiplying the desired image resolution (ppi) by the amount the image will be scaled. Example: If the desired resolution is 300ppi and the image will be scaled 200%: 300 200% = 600spi.

Thermal wax: A type of CMYK output device that bonds a waxy substance to a special type of paper. If you scratch the output of a thermal-wax printer with your fingernail, you will usually be able to scratch off some of the waxy substance.

Upsample: To increase the number of pixels that makes up the width and/or height of an image without changing its general appearance (no cropping or adding of white space).

©2003 Lewis Kemper, www.lewiskemper.com

  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint