Transmitting Color to the Brain

• RED, GREEN, AND BLUE = MAIN THREE COLORS WE USE TO CREATE ALL COLORS THAT WE SEE.
• IF YOU MIX EQUAL AMOUNTS OF RED, GREEN, AND BLUE THE RESULT IS WHITE.
• THE TOTAL NUMBER OF COLORS THAT THE EYE CAN PERCEIVE IS AROUND 2.3 - 10 MILLION!
• TWO CHANNELS, ONE IS FOR COLOR, THE OTHER FOR BRIGHTNESS, BOTH SENT ON SAME HIGHWAY KNOWN AS THE OPTIC NERVE.
• BASED ON YOUR EXPERIENCE, MEMORY, AND EXPECTATIONS, YOUR BRAIN IS ABLE TO IMPOSE A MODEL OF THE WORLD IN WHICH YOU SEE.
• THE BEST EXAMPLE OF HOW MUCH YOUR BRAIN IS INVOLVED IN VISUAL PROCESSING IS THROUGH OPTICAL ILLUSIONS.

Light and Dark

• We are yet to devise any kind of technology that can perform the type of sophisticated color adaptation that your eyes pull off.
• The most significant difference between the eye and any camera is the range of brightness that your eye can perceive.
• Your eye controls brightness A.K.A Exposure, by opening and closing its iris, or pupil, to limit the amount of light that strikes the retina.
• DYNAMIC RANGE = The measure of darkness to lightest tones that can be captured by a device.
• Every time the amount of light in a scene doubles, photographers say that the scene has brightened by one stop, or “f-stop”.
• Conversely if you cut the amount of light in a scene in half, then the scene  has darkened by one stop.
• EVERY DOUBLING OR HALVING OF LIGHT IS MEASURED AS ONE STOP.
• The human eye can perceive a total dynamic range of about 30 stops.
• The higher the “f-stop” the lighter the area, the lower the “f-stop” the darker the area.

Summing UP

• There are ways in which our cameras can out perform our eyes.
• First, you can change the lenses on your cameras, but not your eyes.
• Second, your camera has the ability to let in light for up to 30 seconds at a time.
• Third, your camera allows you to zoom in/extend your field of view, beyond what your eyes can do.
• The study of photography covers two major domains: craft, which is the study of the mechanics of making a good image,