Glossary, ContinuedR (Continued)RANDOM ACCESS MEMORY— Also called RAM. Retrievable computermemory accessible at will without sequential reading.RANGEFINDER— The ground glass in a camera used to focus an image.RASTER-BASED— An image based on the manipulation of a matrix ofpixels or dots.RASTER IMAGE PROCESSOR—Also called RIP. A device forconverting vector-based imagery to high resolution raster images.READ— To access electronically stored data.REAR PROJECTION SCREEN— A matte surface, translucent screen usedwhen projecting an image from behind to a screen.REBOOT— Restart the computer system.RECEDING COLORS— Colors that appear to move away or create theillusion of distance.RECTANGULAR COORDINATE GRAPH— A graph based on a gridsystem where values are plotted by X and Y coordinates.REFERENCE NUMBERS— Numbers used on one drawing to refer toanother drawing for further details.REFERENCE PLANE— The normal plane used to reference all information.REGISTER— To align a page or any elements of an image or impression tomatch the position of successive impressions.REGISTER MARKS— Marks used to key an overlay to a drawing ormechanical as in color separation or combination plates.REMOVED SECTION— A drawing of the internal cross section of an objectlocated near the basic drawing of the object.Continued on next pageAI-50
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