AP Comp Sci Unit 1

Computer

Input, output, processing, storage

Binary

Base 2, counting system that expresses numbers using 1s and 0s

Hexadecimal

easier to read than binary, easier to express larger numbers, usually used for color values

RGB

Additive color mixing, begins at white (0,0,0), 1-255 of red green and blue, communicates the came thing as hex

CMYK

Subtractive color mixing, creates less vibrant colors than rgb

ASCII

1 ASCII character = 1 byte, a way of storing/ communicating text through numbers, specifically for english

Compression

Lossy: some inage data is lost, images may appear different, reduce file size in exchange for worse quality

Lossless: no lost data, removes repeated elements to reduce file size, bigger file size