GRA 633 Lecture Notes - Lecture 2: Ishihara Test, Color Space, Color Blindness

• School: Ryerson University
• Department: Graphic Communications
• Course: GRA 633
• Professor: Abhay Sharma

Document Summary

Gra633 lecture 2 - colour vision human visual system: eyes, optic nerve transferred cable of the retina that goes to the back of eye, brain. Brain interprets electrical impulses from the retina into a colour image. Mixes responses from red/green/blue and lightness cells to get a clear composite image smooths all of the informations into a conscious image (less detail) What comes in at the bottom of your eyes is actually a flipped image: brain flips the image to see it up right. Mathematical representation of the responses of the human eye. Cie1931 standard observer is based on a 2 degree field of view. Functions used as the observer when calculating xyz. Sensitivity of red bar is= little x bar. Functions are used when calculating xyz colour space. Colour vision testing colour deficiencies: also known as colour blindness. Deficiency in telling between reds and greens (protanopia and deuteranopia) or blue and yellows (trianopia)