Chapter 8: Flashcards
1
Q
What are subtractive colours?
A
When a color is created by white light and objects absorbing some wavelengths.
2
Q
What are additive colours?
A
Creating wavelengths instead of manipulating light by absorbing wavelengths.
3
Q
How many bits for each color?
A
8.
4
Q
Explain reasoning for colour triangle
A
Started out with cube - every color is represented by a vector just at different shadings. Therefore they all pass through a triangle.
5
Q
What is (r,g,I)
A
Normalized red intensity, normalized green intensity and the overall pixel intensity.
6
Q
What is hue?
A
Dominant wavelength
7
Q
What is saturation?
A
Color pureness - howmuch whitelight ismixedin with the color.
8
Q
Whatis color tresholding?
A
Selecting pixels that satisfy certain color thresholds.
9
Q
Another word for green screning?
A
Chroma-keying
