Therefore, all we want here is to give a brief overview that will help to follow this work successfully. The way we see objects around us depends on three factors. The first one is light. It is clear that we can not see if there is no light. The second one is the object characteristics itself.
Some objects are red, some are blue, etc.
The third subject involved in color vision is the human observer. It is impossible to describe the color sensation in our mind. Actually, it is impossible to describe any sensation. All we can say is that some color looks like some other, but this is actually not a description of color. Nevertheless, there is the way of measuring colors, and light, and these methods will be described next.