Lecture 3 Flashcards
three types of colour-sensitive cones
short, medium and long wavelenghts
how do we perceive color
by measuring and combining the colored reflectances of neighbouring areas
color schemes similar to RGB
CIELab
HSV
HSV color space
separates hue and saturation
XYZ
transformation from the color matching function to get rid of the negative part
complementary color
Red
Green
Blue
Yellow
Orange
Land’s effect
contextual information is needed to perceive a color
color constancy
recognizing colors irrespective of illumination
color opponency
our visual system takes into account the context of the image and the light source
Responsible brain area for color constancy
V4
where it happens the colour perception
retina
the perceived color of a surface depends on the relative amount of…..
reflected complementary colors
CieLab
separates illuminance
color schemes similar to RGB
CieLab
HSV color space
Why there is a negative part in the CIE spectrum?
for some cases we need to lower the amount of red to perceive the color
Retinex theory
compute the color context and the reflectance of the neighboring area
which two color spaces are suitable for capturing complementary colors
CIELab and HSV
Damage in V4
blind to color
Damage in v5
Blind to motion
( you see the bus coming and then is refin front of you)
