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how many megapixels are human eyes?
How many megapixels are human eyes?how many zoom are human eyes?.

Thanks..

Comments (11)

If you are interested in how they eye works start by looking up "eyeball" on Wikipedia..

StephenG.

Pentax K100DFuji S5200Fuji E900PCLinuxOS..

Comment #1

W333 wrote:.

How many megapixels are human eyes?how many zoom are human eyes?.

Thanks.

My eyeballs only have digital zoom..

J. D.Colorful Colorado.

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Remember.always keep the box and everything that came in it!..

Comment #2

My first inclination was his wa a joke. Then again, maybe it's not. If you are asking how much detail a human eye can resolve, the generally accepted answer for normal vision is about 300dpi. This means to create say an 8x12 print that would be all the human eye can see you would need a 2400x3600 (8.6mp) image. 4x6 would require only 2.2mp (ironic since most consumers are buying 8-12 mp cameras for 99% 4x6 prints), 16x24 would require 34.6mp. This is not to say that with upsampling, sharpening, etc.



As far as zoom goes, I wish mine could, especially at the beach , but I'm afraid mine are fixed at about 55mm prime (on FF or 35mm)...

Comment #3

W333 wrote:.

How many megapixels are human eyes?how many zoom are human eyes?.

Thanks.

Equivalent resolution.

A maximum resolution of the human eye in good light of 1.6 minute of arc per line pair will correspond to 1.25 lines per minute of arc. Assuming two pixels per line pair (one pixel per line) and a square field of 120 degrees, this would be equivalent to approximately 120601.25 = 9000 pixels in each of the X and Y dimensions, or about 81 megapixels.[citation needed].

However, the human eye itself has only a small spot of sharp vision in the middle of the retina, the fovea centralis, the rest of the field of view being progressively lower resolution as it gets further from the fovea. The angle of the sharp vision being just a few degrees in the middle of the view, the sharp area thus barely achieves even a single megapixel resolution. The experience of wide sharp human vision is in fact based on turning the eyes towards the current point of interest in the field of view, the brain thus perceiving an observation of a wide sharp field of view..

The narrow beam of sharp vision is easy to test by putting a fingertip on a newspaper and trying to read the text while staring at the fingertip  it is very difficult to read text that's just a few centimeters away from the fingertip..

Http://en.wikipedia.org/wiki/Eye#Dynamic_range.

Debbie..

Comment #4

Some years from now (or decades, or centuries) cameras will be directly "uploaded" to our eyes. We'll have a vision of 1000MP, plus a focal range of 18-800mm. Besides some barrel distortion @ 18-28mm, it will be perfect..

I've already ordered mine, it's a Nikon D5000 model .

Http://www.flickr.com/photos/96953368@N00/..

Comment #5

Perhaps it would be better to refer the OP to the IMax cinema system..

The numbers there are pretty scary, unless you happen to make hard drives for PC's. Try working out the size of a 16-bit TIFF for a single iMax frame..

StephenG.

Pentax K100DFuji S5200Fuji E900PCLinuxOS..

Comment #6

7 effective. But there is a large amount of pre-processing, so the resolution is greater than this would suggest. Animals like hawks that have extremely high-resolution vision achieve it not by having more pixels but by having two foveas...

Comment #7

Some birds can see into the ultra violet wavelength they can see where rodents have peed and trail them not just by acuity.Bertie..

Comment #8

According to this source:.

Http://www.clarkvision.com/imagedetail/eye-resolution.html.

According to Wikipedia.

Http://en.wikipedia.org/wiki/Cone_cell.

There's about 95 million photoreceptor cells in the eye - that is, about 95 megapixels - but there's a whole range of other factors that mean this raw count of "number of photoreceptors" is not really an accurate measure..

I suppose the real answer is "lots - and lots more than even the most advanced digital camera"..

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Comment #9

Too bad some eyes require assistance at focusing at some distances and require "glasses" or contacts..

I don't feel there is any zoom effect at all with human eyes. Mostly in the peripheral areas all you see is a vague image and "movement"..

Most visual acuity is in that narrow central areas as other responders have mentioned. The one exception is at low light, and then you can sometimes see an object right next to dead center better than staring at it.ngk20000..

Comment #10

Arrowman wrote:.

I suppose the real answer is "lots - and lots more than even the mostadvanced digital camera"..

The actual acuity is comaratively weak out towards the periphery. Not too bad a few degrees surrounding the narrow central vison field where it's at it's greatest..

If acuity were equally high across the entire plane of view, as it is with a camera, life would get very confusing as we'd constantly be processing a vast amount of visual information never quite knowing where our attention should be focused at any one time. We'd probably have gone extinct long before now, our ancestors all having been eaten by predators..

'Here, look at the monkey. Look at the silly monkey!'.

Tom Younghttp://www.pbase.com/tyoung/..

Comment #11

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