GRA 323 Lecture Notes - Lecture 2: Halftone, Computer To Plate, Digitizing
12 Mar 2014
School
Department
Course
Professor
Document Summary
B/w or colour, charcoal sketch, paintings, colour tints. Produced using a contact screen or camera. Via halftones (continuous tone images made up of varying sizes of dots equally spaced a part) Tints (variations of halftones which are same sized dots equally spaces a part to show different variation of colour) Halftones (no round dots, affected by the linescreen ruling of the printed job, digital images affected by resolution and negatively affected if scaled incorrectly) The more dots per inch, the finer ruling. Better presses and tock use higher ruling. If linescreen exceeds capabilities, plugged shadows, loss of detail and poor printing results occur. Printers affect how many lpi"s are needed for a crisp image. 2 x lpi = ppi is the formula for determining the right amount of dots. Vectors created in illustrator, always high quality. Aperture (the opening of the lens, depth of field) Shutter speed (how fast the shutter opens)
