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Chapter 1: Information Processing (1.4 Types of Data (Images (bitmap Image…
Chapter 1: Information Processing
1.1 Input-Process-Output Cycle
Input: Enter data and commands into computer
Process: CPU works on data according to commands
Output: Computer shows processed results
1.2 Stored Programs
Program: sequence of commands
Why? computer can do tasks automatically, repeatedly, accurately
https://youtu.be/eHF9juPzqEU
program stored in Read-only Memory (ROM)
1.3 Data and Information
Data: collection of raw facts
Information: organized, meaningful data, for decision making
1.4 Types of Data
Images
bitmap Image: grid of pixels (像素)
digital camera, scanner, smartphone
Audio
Text
ASCII, Unicode, Big-5 codes
Optical Character Recognition (OCR), voice recognition, handwriting board
Video
1.5 Information System
1.6 Information Process
