Q & A: What is the resolution of a perfect vision of a man if it’s a camera?
Question asked by Kata: What is the resolution of the perfect vision of a man if it’s a camera, I realized that the sight of human eyes is extremely amazing! I wonder what the resolution or the number of pixels must have a digital camera, at least to see as clear as the vision of a perfect man. . Just curious Best answer:
Answer by LEM
A human eye is a very interesting, so to speak. I think this resolution is quite low, but – it is supported by a computer system biologically driven, which has a processing capacity far more than the most advanced electronic computers used today. This is called the brain. The eye moves constantly, dynamically adjust to the environment and scanning the area – then the brain puts all this information together, forming a clear and detailed that we perceive in 3D. Try this – close your eyes for a few minutes, then quickly open them for a time as short as possible and close. You will not catch much of the surroundings, you will see everything around you, but no fine detail, because your eyes are not enough data to capture the brain to form a complete picture …. Then do this, stand by a long wooden fence with only tiny vertical cracks between the boards. You will not see what’s behind, maybe just a little of what is there. Then start walking quickly through the fence, and suddenly, you will be able to see everything behind it. This is because your eyes will catch the fragments seen through each slot, then the brain will analyze them, put them together and form a complete picture. All that said – here’s an interesting article for someone to analyze the human eye, and break it down to ISO, resolution, focal length, etc: LEM http://www.clarkvision.com/imagedetail / eye-resolution.html.
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576mpix
The retina (sensor in the eye) contains two types of photoreceptors, rods and cones. The rods are more numerous, some 120 million, and are more sensitive than the cones. However, they are not sensitive to color. The 6 to 7 million cones provide the eye’s color sensitivity and they are much more concentrated in the central yellow spot known as the macula. In the center of that region is the ” fovea centralis “, a 0.3 mm diameter rod-free area with very thin, densely packed cones.
So actually the number of photoreceptors is quite less from a layman’s point of view but their density in the central region is extremely high. There are anywhere from 160,000 to 250,000 cones per square millimeter in the central fovea — an average cell spacing of about 2.5 to 2 microns, which equals the eye’s maximum possible optical resolution.
Add to it the fact that the photoreceptors in retina are not digital and can transmit various levels of light falling on it. (The retina is much better than the Ansel Adams’ 10 stops of light levels).
This all is just the sensor or the retina. When you combine with the the information processing (in the brain), autofocus mechanisms (lens and pupil), subject tracking (fixation), 3D viewing (with both the eyes working in unison) and auto-exposure (light adaptation), you have a perfect imaging system. No camera comes even close to this.
Another thing which I have not yet listed is the working duration of the eye !!!