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Lecture 3

MMEDIA 1A03 Lecture 3: MMEDIA-L3. JAN 14


Department
Multimedia
Course Code
MMEDIA 1A03
Professor
Dr.0
Lecture
3

Page:
of 5
L3- Jan 14
N bits:
2^) 1=2
2^) 2=4
2^) 8=256
01111110
64+32+16+8+4+2=126
Step 1: represent numbers with binary code
Step 2: represent intensities with numbers
Note:
We need to know about the range (e.g. intensities)
RGB Colour (RGB Encoding)
For example: redness – o to 255 (about 8 bits), 0 to 1.0
Max intensity: 255
Min intensity: 0
No limit to know how many bits
No limit of the possibilities
2^) 16=65536
2^) 24=4 billion
Photoshop
HSB/HSV (+alue)/HSL (+ightness)
(Hue-Saturation-Brightness)
Second color code
Hue: color (Unit: Degree)
Saturation: How close is the color close to R/G/B
(Unit: Percentage)
CMYK
K: black ink
MMEDIA 1A03
Step 1: represent numbers with binary code
Step 2: represent intensities with numbers
Note: we need to know about the range
24 4 billion
VGA (video graphics
adapter) linked to IBM products
Before colours were
8 bits and palettes and numbers between 0-256, they just pointed to a specific
colour and did not represent a colour directly
Point out the
universe is not inherently continuous
E.g. Sun/continuous
arc = our perception of it vs. Of whether it moves that way
Our world, hard
edges and smooth transitions
Digital reconfigures
that somewhat
RGB encoding; not
far away from our own eyesight