Human Vision, Color spaces, Transform

VISION-01; VISION-02

Eyes are such a basic word for us, However it is more profound than just saying it. Eyes are evolved long time ago and today's world a great deal of creatures have complex eyes. Understanding the functioning of eyes contributed a lot to humanbeing and computer vision one of them.

Why do things have eyes:

• To see other things!

• Visual stimulus is an important signal

• Started as photoreceptive protein (eyespots)

How do humans eyes work:

• Complex!

• Light passes through

  • Cornea, humours, lens refract light to focus

• Hit the retina

• Absorbed by photosensitive cells

• Info transmitted through optic nerve, processed by visual cortex

Extra 🏆 : One of the most famous experiment in physics is the double slit experiment

💡 Light is a combination of waves and objects reflect only some light

RGB is a cube

HSV is cylinder

HUE, SATURATION, VALUE

• Different model based on perception of light

• Hue: what color

• Saturation: how much color

• Value: how bright

• Allows easy image transforms

  • Shift the hue

  • Increase saturation