Computer Science 1033A/B Lecture Notes - Lecture 4: Octal, Cmyk Color Model, Digitizing

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

Document Summary

Non-digital medium (paper copy of a photo: scanner saves the image in a file on your computer. Outside world photography: digital images uploaded to a file on your computer. Create image clip art images/scenes: saves images to a file. Process of translating a piece of information (text, images, sound, video) into binary bits. It"s (cid:449)hat co(cid:373)puters u(cid:374)dersta(cid:374)d a(cid:374)d speak (value of 0 or 1) Bit is a fundamental unit of information in a computer system: computers are built from electronic devices that have two options: on and off. Binary: 2 binary digits/bits: ex: 0, 1, 10, 11, 100, 101. Octal: 8 digits (8 number values: 0, 1, 2, 3, 4, 5, 6, 7, 10. Decimal: 10 digits: 0 9. 1 bit = 2 values (0, 1: black and white, true and false. 2 bits = 4 values (00,01,10,11: red, blue, yellow, green. 3 bits = 8 values: days of the week, 8 shades of gray.