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Digital Information

codeHS - Digital Information Unit

TermDefinition
Digital Information Information that can be expressed in a numerical form.
Encoding The processing of information into numbers so that it can be stored and manipulated by computers.
Data Abstraction The process of simplifying complicated data into manageable chunks.
Decimal Number System A system with 10 numeric values, 0 through 9.
Binary Number System A system with two numeric values of 0 and 1.
ASCII A protocol or code for representing English characters as numbers, with each letter assigned a number from 0 to 127.
Pixel The fundamental unit of a digital image, a tiny square or dot which contains a single point of color of a larger image.
Hexadecimal Number System A system with sixteen distinct symbols 0-9 and A-F.
Pixel Images Using of a grid of values encoded to represent a certain color in a specific position.
RGB Color Encoding Defining the amount of Red, Green, and Blue light displayed in a pixel.
Pixel Filter Manipulating the encoded values of specific pixels (that are already arranged in a grid) to modify the image.
WebImage A JavaScript API that lets us add images to our programs and manipulate their pixels.
setPosition (x,y) JavaScript function that sets the position of the upper left corner of the image.
setSize (width, height) JavaScript function that sets the width and height of the image in pixels.
getWidth ( ) JavaScript function that reports the width of the image in pixels.
getHeight ( ) JavaScript function that reports the height of the image in pixels.
getPixel ( ) JavaScript function that reports the pixel at coordinates (x,y) as an array (list) of 3 numbers [R,G,B]
setRed (x, y, value) JavaScript function that sets the R value of the pixel at (x,y) to be a value.
setGreen (x, y, value) JavaScript function that sets the G value of the pixel at (x,y) to be a value.
setBlue (x, y, value) JavaScript function that sets the B value of the pixel at (x,y) to be a value.
Image Filter Manipulating the encoded values of ALL pixels (that are already arranged in a grid) to modify the image.
Created by: TheMsAllsop
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