Class Notes (835,094)
Canada (508,920)
Psychology (5,208)
PSYCH 2E03 (70)
Lecture

Colour Perception (3).docx

4 Pages
125 Views
Unlock Document

Department
Psychology
Course
PSYCH 2E03
Professor
Gautam Ullal
Semester
Fall

Description
November 14 , 2012 Psych 2E03: Sensory Processes Colour Perception (3) Colour constancy - despite change in ambient environment, the colour you see appears to be almost similar - required for survival Possible for colour constancy - chromatic adaptation: prolonged exposure to chromatic colour leads to receptor:  adapting when the stimulus colour selectively bleaches a specific cone pigment  decreasing in sensitivity to the colour - adaptation occurs to light sources leading to colour constancy Chromatic Adaptation - experiment by Uchukawa et al. - observers shown sheets of coloured paper in three conditions:  baseline: paper and observer in white light  observer not adapted: paper illuminated by red light; observer by white  observer adapted: paper and observer in red light - results showed that:  baseline: green paper is seen as green  observer not adapted: perception of green paper is shifted toward red  observer adapted: perception of green paper is slightly shifted toward red: partial colour constancy was shown in this condition Land’s experiment demonstrating colour constancy with Mondrian collages - three projectors project different wavelengths of lights: S, M and L on a Mondrian collage - a telephotometer registers reflected light from a particular square as white while the human eye (brain) perceives that square as blue if it had been blue, red if it was red etc. - why:  because, the human eye accounts for the background illumination  if that square was isolated without the background it would be perceived as white just like the telephotometer Possible causes of colour constancy - effect of surroundings: colour constancy works best when an object is surrounded by many colours - memory and colour: past knowledge of an object’s colour can have an impact on colour perception Colour
More Less

Related notes for PSYCH 2E03

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit