digital photography vs human eye

[dannyday5821]

just curious - in digitial photography low light produces noise - which appears green blue and red... i can understand this in digital photography...

but if we understand how the human eyes work why cant they or havent they produced a camera that replicated how the human eye works? human noise seems very very minimal unless its in very very low light, a camera would need a high ISO like 6400, 12800+ which depending on camera and lens usually ends up a noisy mess... yet human eyes do the same job, better, and with a grain effect instead...

[Buenchico]

It's not actually low light which creates noise but the amplification needed within the camera's circuitry in order to bring the tiny electrical signals from the CCDs up to something which is usable to produce an image.

Until someone can invent something which is more sensitive to light than the CCDs currently used in cameras, there will always be a need for signal amplification (with the problem of noise being introduced through that amplification).

Such devices actually exist (e.g the ICCDs and EMCCDs which are used in astronomical research cameras ) but they're unsuitable for use in the types of cameras used by the general public.

Chris

[dannyday5821]

cool answer Buenchico - thanks alot very interesting ill read into it anyway just out of interest :)

thanks!

[york310]

You also have to take into account that the human eye doesnt have an even spread of photo-receptor cells across the retina and also has two types (rods and cones) with completely different jobs. You then have to think if the camera really needs to do the job of only the central retina known as the macula which is where 95% of the million photoreceptors are located or involve the peripheral retina which is more use for light/dark awareness and night vision.

Lots to look into.

[237SJ]

There is no comparison between digital photography (or film photography) and the human eye. The human eye will win every time.

[jeccosa]

I think this is not comparable, in fact, a lot of time to see the feeling is not the same. If you want to buy camera accessories, you can visit http://www.tmart.com/Cameras-Photo/

[amitchhabra]

coz eyes gifted by god and however human working hard they can never beat nature... although he is trying its best to make it nearer to it... but whenever he come up with somthin more refined, he actually sees that he still has long long way to go.... although cameras are doing really good....