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Digital Cameras
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 Re: Digital Cameras
Posted by wil5on on Sat Jul 16th at 2:54am 2005

They say 30fps, but you have to take into account the fact that it doesnt sample frames instantaneously. In each frame sampled, there will be some motion blur, which means that a game at 30fps can still look jerky, since theres no motion blur. Thats my understanding of it at least.


"If you talk at all during this lesson, you have detention. Do you understand?"
- My yr11 Economics teacher



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 Re: Digital Cameras
Posted by Orpheus on Sat Jul 16th at 3:15am 2005

The human eye can detect 120 flashes per second.. IE "Incandescent light bulbs"

Whether it can do more I dunno, but I learned that much in school.

Which brings up an interesting discussion I had then. A light bulb flashes off and on. That means that 50% of the time its pitch black in the room. (assuming you have no other sources of illumination.)

Why do our eyes only see the "on" portion? Evolution? Psychological? what?

That also brings to mind, the debate I had here about how fast dark is..

anywho's....





The best things in life, aren't things.



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 Re: Digital Cameras
Posted by wil5on on Sat Jul 16th at 4:24am 2005

Accodring to my theory, we only see when the light is on because of how the eye samples each frame. Since it is sampled over time, the light registered as hitting any part of the retina in a sample is the sum of light that has hit that part of the retina in the last 1/30 seconds. So while the light is flashing, the "on" and "off" images are superimposed, and the on image, being brighter, is stronger.




"If you talk at all during this lesson, you have detention. Do you understand?"
- My yr11 Economics teacher



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 Re: Digital Cameras
Posted by DrGlass on Sat Jul 16th at 4:53am 2005

the human eye cant tell the diffrence between a 16fps film from a 160fps film.

The only time we notice the slower fps is when there is fast motion (a car driving by or a fast pan) apart from that it makes little diffrence for the eye.

I'm not 100% sure about 16, it may be as low as 13fps... I'll have to ask my dad about it (he was a film maker and all around smart guy)





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 Re: Digital Cameras
Posted by rival on Sat Jul 16th at 7:22pm 2005

interesting article about eye framerates and what not:

http://www.answers.com/topic/persistence-of-vision






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