Computer Science 1033A/B Lecture Notes - Lecture 3: Clip Art, Octal, Sound Recording And Reproduction

• School: Western University
• Department: Computer Science
• Course: Computer Science 1033A/B
• Professor: Laura Reid

Document Summary

Octal ! (8 digits or think of it as 8 number values) Image: represented by a grid (array, matrix) of squared picture elements called. Pixels (the smallest image component and thus shows the smallest detail: pixel numerical value corresponding to a color indicator (b&w or colour, 640x480 screen 640 dots on each of 480 rows ! Coding colors: black/white = 1 bit only (0 = black, 1 = white, 2 bits combination of black and white (01/10) ! grey, more bits, more shades 4 bits ! Used for printing- subtractive model (rgb) use for web* (cmyk) (k=black) Added light to a black background in order to obtain color shades. Uses printing ink - when applied to paper removes ( subtracted ) from a white background. Commercial print is built on cmyk plates and inks. In true color each pixel represents some color shade uses 24 bit representation. = 16 million colors: human eye can detect 10 million colours.