IT 2 - storing and compressing Images Flashcards
What are the different Data types?
- A single (two-byte) integer
- Array of two (one-byte) integers
- A string of 2 characters
What are multi-byte integers?
8-bit: 1 byte (0-255)
16 bit: 2 bytes (0-65535)
32 bit: 4 bytes
64 bit: 8 bytes
What do floating-point numbers store>?
Digits and magnitude
What are the 3 components of floating point numbers?
- sign - 1 bit
- Mantissa (fraction, significant) - 23 bits
- Exponent (magnitude) - 8 bits
What is each known point?
Pixel or voxel
What are multidimensional images?
Array of pixels
What is bit?
The smallest unit of storage
A bit stores just a 0 or 1
What is one byte?
Collection of 8 bits
Mathematically what does n bits yield?
2^n patterns
What are the different types of bytes?
Kilobyte, KB, about 1 thousand bytes
Megabyte, MB, about 1 million bytes
Gigabyte, GB, about 1 billion bytes
Terabyte, TB, about 1 trillion bytes (rare)
What are floating-point numbers?
Store numbers that have a decimal in it
Numbers can be very very big or small
Why is floating point binary efficient?
Efficient use of a computer register to represent extremely large values or small, or values that require a high degree of precision
What is floating point binary similar to?
Standard scientific notation in base 10
In 2D array what can compiler follow?
- Row Major
- Column Major
mapping
Why are arrays always created in single dimension in memory?
Memory is linear. and having single integer address
