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imax - 15 fps?

B

BennyD

Banned
just read this and it says that the imax format is 70mm, 15fps film.

is this true?

wouldn't that mean it wouldn't be as smooth?

can someone explain it to me?
 
It's got to be a typo. The human eye can detect changes in things less than 24 fps. Have you ever SEEN a movie on IMAX????? The only explanation is a typo.
 
Originally posted by: FFMCobalt
It's got to be a typo. The human eye can detect changes in things less than 24 fps. Have you ever SEEN a movie on IMAX????? The only explanation is a typo.
Click to expand...

They aren't too smooth.
 
Originally posted by: WinkOsmosis
Originally posted by: FFMCobalt
It's got to be a typo. The human eye can detect changes in things less than 24 fps. Have you ever SEEN a movie on IMAX????? The only explanation is a typo.
Click to expand...

They aren't too smooth.
Click to expand...

Granted, but they're not THAT bad. I used to play Descent 2 on my crappy 486 at 12-15fps depending on how many enemies were in the same room. Their movies aren't that choppy. Not nearly. 24 I would believe, but 15? There's just no way.
 
Originally posted by: FFMCobalt
Originally posted by: amnesiac
http://www.sciencemuseum.org.uk/imax/imaxtechnology.asp
Click to expand...

Quoted from the site: "The film travels through the projector at 24 frames per second, at a rate of 334 feet per minute! That translates to nearly two miles of film in a typical IMAX film! A 35mm projector also projects 24 frames per second but only travels at 90 feet per minute."
Click to expand...

Yeah I was going to say its much smoother then 24fps. I went to this park in France called FuturaScope all about movies and such. Lots of imax stuff.

The film was very clear and blisteringly good!

The speed would make it more full. 334 feet per minute! compared to 90 feet per minute normal 35mm. Als the film is also bigger I believe 70mm or 60mm........
 
Originally posted by: FFMCobalt
Originally posted by: WinkOsmosis
Originally posted by: FFMCobalt
It's got to be a typo. The human eye can detect changes in things less than 24 fps. Have you ever SEEN a movie on IMAX????? The only explanation is a typo.
Click to expand...

They aren't too smooth.
Click to expand...

Granted, but they're not THAT bad. I used to play Descent 2 on my crappy 486 at 12-15fps depending on how many enemies were in the same room. Their movies aren't that choppy. Not nearly. 24 I would believe, but 15? There's just no way.
Click to expand...

dont forget, tv/movies/imax/whatever has motion blur, which helps to negate the choppiness.

try playing a game at 24fps, and it will still be choppy as heck.
 
Movies actually play at 48 fps: 24 frames with each frame doubled to reduce flickering. I would assume that imax does the same, but someone else will have to confirm.
 
Originally posted by: Venix
Movies actually play at 48 fps: 24 frames with each frame doubled to reduce flickering. I would assume that imax does the same, but someone else will have to confirm.
Click to expand...
?

I thought only TVs used fields?
 
Originally posted by: Venix
Movies actually play at 48 fps: 24 frames with each frame doubled to reduce flickering. I would assume that imax does the same, but someone else will have to confirm.
Click to expand...

Projected film runs at 24 fps. The rest of the time you're sitting in the dark. Nothing is doubled.

dont forget, tv/movies/imax/whatever has motion blur, which helps to negate the choppiness.
Click to expand...

It's not motion blur. Film runs on the persistence of vision principle. It's the idea that in the time it takes the projector to change frames, the brain still sees the previous image.
 
Originally posted by: pulse8
Originally posted by: Venix
Movies actually play at 48 fps: 24 frames with each frame doubled to reduce flickering. I would assume that imax does the same, but someone else will have to confirm.
Click to expand...

Projected film runs at 24 fps. The rest of the time you're sitting in the dark. Nothing is doubled.

dont forget, tv/movies/imax/whatever has motion blur, which helps to negate the choppiness.
Click to expand...

It's not motion blur. Film runs on the persistence of vision principle. It's the idea that in the time it takes the projector to change frames, the brain still sees the previous image.
Click to expand...

well, i'm not saying it's added, im just saying the effect is there, unlike in computer monitors.
 
Originally posted by: wfbberzerker
Originally posted by: pulse8
Originally posted by: Venix
Movies actually play at 48 fps: 24 frames with each frame doubled to reduce flickering. I would assume that imax does the same, but someone else will have to confirm.
Click to expand...

Projected film runs at 24 fps. The rest of the time you're sitting in the dark. Nothing is doubled.

dont forget, tv/movies/imax/whatever has motion blur, which helps to negate the choppiness.
Click to expand...

It's not motion blur. Film runs on the persistence of vision principle. It's the idea that in the time it takes the projector to change frames, the brain still sees the previous image.
Click to expand...

well, i'm not saying it's added, im just saying the effect is there, unlike in computer monitors.
Click to expand...

Why can't computer monitors or graphic cards *delay* it so there is no noticable lag?

Why is movies/dvd's/ cinema etc work at 24fps and look fine. But games at 24fps look cack.......?

 
Originally posted by: pulse8

It's not motion blur. Film runs on the persistence of vision principle. It's the idea that in the time it takes the projector to change frames, the brain still sees the previous image.
Click to expand...

While the illusion of motion created by film is due to the persistence of vision, film by its nature can also possess motion blur (think about someone in a family snapshot who doesn't stay still when the picture is being taken); the image of the still frame is blurred due to the object moving within the length of the exposure.

Motion blur is also why 24 fps is acceptable as smooth motion to the human mind where 24 fps of discrete 3D images (which lack blurred motion in individual frames) may not be.
 
Originally posted by: FeathersMcGraw
Originally posted by: pulse8

It's not motion blur. Film runs on the persistence of vision principle. It's the idea that in the time it takes the projector to change frames, the brain still sees the previous image.
Click to expand...

While the illusion of motion created by film is due to the persistence of vision, film by its nature can also possess motion blur (think about someone in a family snapshot who doesn't stay still when the picture is being taken); the image of the still frame is blurred due to the object moving within the length of the exposure.

Motion blur is also why 24 fps is acceptable as smooth motion to the human mind where 24 fps of discrete 3D images (which lack blurred motion in individual frames) may not be.
Click to expand...

The effect of motion blur has more to do with resembling real life than it does in the acceptance of motion on a screen. When you're sitting in a car, the trees next to the highway aren't in focus. It's just the way we see things. If everything is in focus, then it's just not natural.

The reason 24 fps is acceptable is because of persistence of vision, which doesn't apply to images on a computer. It only applies to projected film.
 
Originally posted by: pulse8
Originally posted by: FeathersMcGraw
Originally posted by: pulse8

It's not motion blur. Film runs on the persistence of vision principle. It's the idea that in the time it takes the projector to change frames, the brain still sees the previous image.
Click to expand...

While the illusion of motion created by film is due to the persistence of vision, film by its nature can also possess motion blur (think about someone in a family snapshot who doesn't stay still when the picture is being taken); the image of the still frame is blurred due to the object moving within the length of the exposure.

Motion blur is also why 24 fps is acceptable as smooth motion to the human mind where 24 fps of discrete 3D images (which lack blurred motion in individual frames) may not be.
Click to expand...

The effect of motion blur has more to do with resembling real life than it does in the acceptance of motion on a screen. When you're sitting in a car, the trees next to the highway aren't in focus. It's just the way we see things. If everything is in focus, then it's just not natural.

The reason 24 fps is acceptable is because of persistence of vision, which doesn't apply to images on a computer. It only applies to projected film.
Click to expand...

Thanks for clearing that up 😀

Hey so if we had a screen that was big enough and it *actually* moved backwards and forwards and left to right it would create a more *real* vision?
 
Hey so if we had a screen that was big enough and it *actually* moved backwards and forwards and left to right it would create a more *real* vision?
Click to expand...

Only if you'd be able to see it through the puke you'd be coughing up. 😛
 
Originally posted by: pulse8
Hey so if we had a screen that was big enough and it *actually* moved backwards and forwards and left to right it would create a more *real* vision?
Click to expand...

Only if you'd be able to see it through the puke you'd be coughing up. 😛
Click to expand...

Just joking 😛 just an idea though lol.

good info I learnt here pulse8.
 
Originally posted by: BennyD
just read this and it says that the imax format is 70mm, 15fps film.

is this true?

wouldn't that mean it wouldn't be as smooth?

can someone explain it to me?
Click to expand...
iirc
i think that you forget that imax has several projection units and from different angles.
so 15 fps isn't bad as long as it is synced right with the other 3 or more projectors
 
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