Tuesday, 28 August 2012

Human Eye a Natural Camera: Having 576 MegaPixels

A Human Eye which is a Natural device having 576 Megapixels, the technical breakdown of megapixels is as follows:

Consider a view in front of you that is 90 degrees by 90 degrees, like looking through an open window at a scene. The number of pixels would be 90 degrees * 60 arc-minutes/degree * 1/0.3 * 90 * 60 * 1/0.3 = 324,000,000 pixels (324 megapixels).



At any one moment, you actually do not perceive that many pixels,
but your eye moves around the scene to see all the detail you want. But the human eye really sees a larger field of view, close to 180 degrees. Let’s be conservative and use 120 degrees for the field of view.

Then we would see 120 * 120 * 60 * 60 / (0.3 * 0.3) = 576 megapixels.

The full angle of human vision would require even more megapixels. This kind of image detail requires A large format camera to record.

The average human retina has five million cone receptors on it. Since the cones are responsible for colour vision, you might suppose that this equates to a five megapixel equivilant for the human eye.

Therefore, once our cameras reach 576MP, the pictures you take with your camera will look exactly the same as you see them.



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