On Set with Oando TVC

On set with Oando Testimonial TVC


Created by Sayo Aluko
How we see Colour

Our eyes contain selective ‘cone s’ which detect colour by analysing the visible spectrum into three primary colour regions – red to orange, green to yellow, and blue to violet.

Most coloured surfaces reflect a colour mixture of red, green, and blue light in varying proportions.  So for instance, the various shades of ‘green’ we see in foliage, are actually colour mixtures reflecting quite a wide spread of the visible spectrum.  Even yellow; can be reproduced by adding suitable proportions of red and green light!

How the camera sees colour

The colour video camera too relies on this additive colour mixing process. Any light sensor  CCD or camera tube can only respond to the intensity of light it cannot directly distinguish colour.  So we imitate the eye.  By placing red, green, and blue colour filters over three light –sensors, we can analyse the scene into its separate colour components.  If a subject appears to have similar proportions of all three primaries, we see this mixture as white.

 In the colour video camera, the lens’ image of the scene passes through a special prism, which splits it into three identical versions.  Three CCD sensors with their red, green, and blue colour filters provide three video signals corresponding to the light and shade of these colours in the scene.