Difficult Question..?

Question

Cameras can take great hi-def pictures. My phone has a 3megapixel camera.. my digital camera is 7megzpixel..

what kind of Mega Pixels does the human eye take ?..

Answer 1

Best Answer - Chosen by Asker

Just a part of the article for reference:

How many megapixels equivalent does the eye have?

The eye is not a single frame snapshot camera. It is more like a video stream. The eye moves rapidly in small angular amounts and continually updates the image in one's brain to "paint" the detail. We also have two eyes, and our brains combine the signals to increase the resolution further. We also typically move our eyes around the scene to gather more information.

Because of these factors, the eye plus brain assembles a higher resolution image than possible with the number of photoreceptors in the retina. So the megapixel equivalent numbers below refer to the spatial detail in an image that would be required to show what the human eye could see when you view a scene.

Based on the above data for the resolution of the human eye, let's try a "small" example first. 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!

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It is now estimated that the human eye has a resolution of 500 mega pixels!

However,If your eyes are 500 megapixels means across your entire field of view. Looking at a photo only uses a small portion of that area, so it only takes a fraction of 500 megapixels to fully saturate your visual resolving power!

Source(s):

Website: http://www.clarkvision.com/imagedetail/e…

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Asker's Comment:

most hard work, cheers

Answer 2

Different ball game. Don't go there.
6 is fine unless you want to enlarge your pics to the size of St. Paul's Cathedral.

Answer 3

We dont see in mega pixels. We see with Rods and Cones. But, if you're asking the quality of what a person sees, it would be a very very large number.

Answer 4

its not that high, as we dont record frames we see reflecting light in a constant stream the res doesnt need to be that high - like video opposed to stills,

actually the eye is optical not digital so any attempt to give numbers is pointless - we dont see pixels or record them - we see reflected light - or reflected photons?

a

Answer 5

Well, it seems you're asking the human equivalent of megapixels, and you could convert the rod and cone count in the retina to pixels-since each pixel represents a single point of information in binary code; that certainly could be considered the equivalent of one rod or cone, because what you are really getting at is the relative acuity of the human eye vs. digital cameras.

Forgive me for not doing the math for you, but the density of rods and cones varies-and they are as dense as up to 160,000 per mm, so you would need to come up with a reasonable average, then do the mathmatical conversion. That's a little beyond my knowledge of anatomy and math. But there isn't any need to complicate it too much with angles and static vs. moving images and blahblahblah. Figure out how many pixels per inch (ppi) and how many rods/cones per inch...or do it by millimeters or whatever-and you have a comparative figure.

That average-and indeed, the comparative value-might be found in the literature; here is a link that will give you a better idea of the construction of the human eye:

http://www.cis.rit.edu/people/faculty/mo…

Interesting-and actually quite relevant question. Perhaps you should repost it in the mathematically inclined optometrist section...there IS a mathematically inclined optometrist section here, isn't there?

Answer 6

None.

Your eye does not have to convert light into a digital format.

Source(s):

digiPro

Answer 7

Whatever it has, my Leica is sharper ;-)