Week 10: colout Flashcards
what range of wave length can humans visualise between
400nm (blue) to 700nm (red)
what is lumination
amount of light energy perceived by observer
what is luminous intensity
measure in CD, amount of intensity shown on 1/60 of black body at freezing temp for platinum (1769˚)
what is luminous flux
1cd emits 4pi lumens
what is illumination
amount of luminous flux on a surface of area
how many colours can humans see?
500,000
what is radiance
total amount of energy emitted from a light source (watt)
what is HUE
the dominant wave length prominent (i.e most seen colour)
what is saturation
the apparent concentration of the Hue in a image
what is the YIQ model
luminance, inphase, quadrature
what is HIS model
Hue, intensity, saturation
what is chromaticity
when u add hue and saturation
it is the standardised way of describing colour
how to calcualte image data size
multiply rows by columns by bit depth
8 bits=1) (10 bits=2
e.g of 10 bit image 1000x1000x2 =2MB
