Things I've learnt today about the ways the human brain and the eye percieve light and colours:
- 'White' light comes in the range of colours - usually an even mix of red, green and blue. Human beings perceive this combination of light colours to be colourless. The eye can detect a very slight change in the colour mixture but the brain refuses to admit the difference. As long as there is a reasonable amount of each primary colours, the brain says 'this light is white'. Digital camera makes the same automatic adjustment to colour that the brain does, but not nearly as reliable.
- The phychological image in the brain may be quite different from the photochemical one the eye actually sees. Years of programming enable our brains to edit the image of the scene. This editing minimases reflection that is distracting or trivial to the subject. At the same time, it maximises the importance of whatever light is essential to our comprehension of the scene.
- The brain cannot edit an image of an image so effectively.
- 'White' light comes in the range of colours - usually an even mix of red, green and blue. Human beings perceive this combination of light colours to be colourless. The eye can detect a very slight change in the colour mixture but the brain refuses to admit the difference. As long as there is a reasonable amount of each primary colours, the brain says 'this light is white'. Digital camera makes the same automatic adjustment to colour that the brain does, but not nearly as reliable.
- The phychological image in the brain may be quite different from the photochemical one the eye actually sees. Years of programming enable our brains to edit the image of the scene. This editing minimases reflection that is distracting or trivial to the subject. At the same time, it maximises the importance of whatever light is essential to our comprehension of the scene.
- The brain cannot edit an image of an image so effectively.
