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Rolling Shutter - Show me your worst

Dominik Muench

Dominik Muench

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Hi Guys,

as part of my doctorate on HD cameras, I am currently writing a chapter on CMOS and CCD chips for which I need some image samples of rolling shutter and vertical smear effects. The more apparent the better.

would anyone here have some samples which I can included in my paper ?
any help appreciated, thank you.
 
Sure Dom,

Got a few for you. Do you have FTP which would be easierr to get them to you at full res. I need to find the shots and get them cutdown and exported, so i'll email you some bits tomorrow hopefully.

And let me know when your work is finished...would love to have a read.

Oh..and by the way, still no firm decisions on format yet from our discussion the other day...waiting waiting waiting for Execs to make up their mind.

All the best.

T.
 
Dominik,

Here are three images shot in sequence of lightning. I posted one of them on another thread as well. Are they high enough resolution for you?

Lightning%20Rolling%20Shutter2.png


Lightning%20Rolling%20Shutter1.png


Lightning%20Rolling%20Shutter3.png


I hope that helps.

Phil
 
Dominik Muench said:
as part of my doctorate on HD cameras
Click to expand...

You had me at 'doctorate on HD cameras'! Which faculty are you doing this under?


Phil Bates said:
Dominik,

Here are three images shot in sequence of lightning. I posted one of them on another thread as well. Are they high enough resolution for you?
Click to expand...

Wow Dominik, those clouds and lightning are incredible.
 
wicked, thanks a lot tony :)
I will email you a draft, will be interesting to see what you experts think of it.

thank you thomas & phil, looks fantastic.

Sean: I'm going to Bond Uni on the Gold Coast in Queensland.
 
Dominik Muench said:
Hi Guys,

as part of my doctorate on HD cameras, I am currently writing a chapter on CMOS and CCD chips for which I need some image samples of rolling shutter and vertical smear effects. The more apparent the better.

would anyone here have some samples which I can included in my paper ?
any help appreciated, thank you.
Click to expand...

This is from a Canon 7d we tested for a commercial shoot. http://vimeo.com/9456390 needless to say, we chose other options.
 
Dominik Muench said:
David: bloody hell, that's pretty heavy distortion. thanks for sharing :)
Click to expand...

You said it. Any minor desire I ever had to go down the DSLR video path vanished with that test. BTW the camera was mounted on a support for the snow plow on a very heavy Volvo truck. An HPX 170 and a GoPro camera passed the test (the GoPro just barely, the 170 with flying colors.)

So now I'm eager to see what other scary samples come out of the woodwork. LOL!
 
I wonder what the particular cause for this is, cause on some cameras it works on others the effect is pretty damn apparent all the time.

not a DSLR fan either when it comes to movies. I have a nikon D3s which i looove for its low light capabilities but I wouldnt shoot anything more serious then a behind the scenes clip for my photoshoots on it.
 
Dominik Muench said:
I wonder what the particular cause for this is, cause on some cameras it works on others the effect is pretty damn apparent all the time.
Click to expand...

My thought is that it is the speed of the read. The slower the read, the more the camera will have moved between lines.
 
Maybe I don't understand what the rolling shutter problem is but I don't see how any of those examples represent a rolling shutter issue on R1.

If you are panning with a fast moving object (a plane) rolling shutter should not be a problem except for maybe the objects in the background.
The 7D POV example from above seems to be mainly a mount issue (vibration).
 
The 7D example is a very good illustration of rolling shutter issues.

It could maybe have been diminished with a really smooth mount, but that wouldn't really show what rolling shutter is all about, would it?
 
Gunleik Groven said:
The 7D example is a very good illustration of rolling shutter issues.

It could maybe have been diminished with a really smooth mount, but that wouldn't really show what rolling shutter is all about, would it?
Click to expand...

True dat.
I don't think any camera would perform properly in those circumstances, rolling shutter or not.
 
Milan Spasic said:
True dat.
I don't think any camera would perform properly in those circumstances, rolling shutter or not.
Click to expand...

Why would you think that? Cameras perform in all sorts of adverse conditions. As I said in an earlier post, I tested three cameras for this project. The other two performed quite well. The 7D was unusable. This is crash cam territory, so I wasn't interested in testing my Red One.
 
Gunleik Groven said:
The 7D example is a very good illustration of rolling shutter issues.

It could maybe have been diminished with a really smooth mount, but that wouldn't really show what rolling shutter is all about, would it?
Click to expand...

Exactly. In this case, it would have complicated the shot as well. For the actual shoot, the cameras would have to be protected from the weather as well, and an exotic mount would have made that significantly more difficult.
 
Milan: I dont necessarily need rolling shutter samples form the R1, any camera will do for my paper :)

from my understanding rolling shutter occurs when the chip doesn't sample its whole pixel array at the same time, kinda like an interlaced image that's made up of two slightly different half images sampled with a delay.
 
Dominik Muench said:
Milan: I dont necessarily need rolling shutter samples form the R1, any camera will do for my paper :)

from my understanding rolling shutter occurs when the chip doesn't sample its whole pixel array at the same time, kinda like an interlaced image that's made up of two slightly different half images sampled with a delay.
Click to expand...

It's more like (conceptually) a slit-style focal plane shutter like most 35mm (film) still cameras use, only set vertically like it was on an old Speed Graphic.

This is not a new thing, nor is it unique to digital imaging -- or to moving pictures. There is a wonderful example of the effect in a photograph at MoMA in NY that was taken with a large-format still camera with a focal-plane (slit) shutter in 1913 by J H Lartigue.

jacques_henry_lartigue.jpg


(this link is from photography-now.net)
 
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