Here are a few shots that turned out decently: http://nnife.com/p/?dimension=20 These are just film scans. You can by the light bars see on the photos that it was very hard to rotate the camera at a constant rate.
You can also see that as I went with/against the traffic, cars were elongated or shortened. Really interesting phenomenon. I was working on this with a painting teacher at the school I go to, whose fascination with unconventional forms of photography got me interested as well. Unfortunately I was a woodworking noob when I made it so its success rate was too low for me to keep using it and I never took many more photos than that.
If I ever get around to building a better version I want to try an idea he had: mount the camera in a spot and expose it over the same piece of film at three different times of day using red, green, and blue filters. That would add another level to emphasizing time in a photograph.
The teacher I was working with is named Nicholas Evans-Cato. The experiment started off as just one to make a film panoramic camera. You can see why he'd be interested in that if you look at his work. http://www.georgebillis.com/artists/nicholas_evansCato.html
I'm sure it's been done before, but it was a really fun experiment. Changed the way I think a little bit.
Note that this is slit-SCAN, which is a bit different in that it moves the "slit" across the face off the sensor, rather than capturing from a static slit over time (the same technique was used in Star Trek:TNG to show the Enterprise going into warp). Nonetheless, you can play with time similarly.
Simplest/oldest: http://www.sentex.net/~mwandel/tech/scanner.html (The garage door picture continues to be awesome after so many years.)
More professional version: http://golembewski.awardspace.com/index.html (And weirdest - you really do not want to blink during one of these photos.)
Just what came to my mind just now.
And pretty much everyone here would be familiar with a couple of artistic uses of slit-scan photography - the opening credits of Doctor Who ( http://h2g2.com/approved_entry/A907544 ) and the ending of 2001: A Space Odyssey.
I don't mean to denigrate the art though, because the pics are still striking and interesting.
The caption says... "the biker and runner crossed the finish line moving in opposite directions"
#starting at 467s and outputting the images of the next 3 seconds
ffmpeg -ss 467 -t 3 -i video.mkv output.%04d.png
# crop image to 1px slices 280 pixels from the left.
gm mogrify -crop 1x+280+0 *.png
# stitch them
gm montage -border 0 -geometry +0+0 -tile x1 *.png image.jpg
Now someone just has to find movies with static camera scenes that have a lot of horizontal actor/object movement.
Random example showing Bill Bailey as a demon: http://i.imgur.com/AWWG8.jpg
Some static rallye car cameras from http://www.youtube.com/watch?v=D2QMuT04EOw -> http://i.imgur.com/GV3bY.jpg
Needs either higher framerate videos or longer scenes.
If we assume 50fps, then every 1000px wide video would become a 3-4 minute short. But movies would require a very wide screen...
P.S. you can use "output.%03d.png" to zero pad the output to 011 (and %04d for 0011 etc.)
gm montage -borderwidth 0 -geometry +0+0 -tile x1 *.png image.jpg
# of 1-px wide PNGs Resulting width (px)
What's up with the crazy widths on the result? What is GraphicsMagick doing?
Nowadays they are digital I guess, but the technology is the same - you record only a sliver (the goal line) - the analog version has the film running past the sliver on spools, with the speed being adjustable based on how fast objects you want to record.
For a long video you'd get a very wide image that varies over a pretty short duration. A 1920x1080 video clip that's 80 seconds long @24 fps would come out right. It'll still be 1920x1080 and 80 seconds long after transformation.
This was made on a large format camera -- probably something like 4 x 5 inches -- with a focal plane shutter. The shutter has a huge distance to cover -- 4 inches -- and it takes a while for the slit to cross the whole film frame.
The camera panning on one direction caused the spectators in the background to be distorted in one direction, while the car was moving faster than the camera and is distorted in the other direction.
Its interesting to note that the distortion was mimicked in cartoons as a way to show speed.
It uses Web RTC so you'll need a capable browser (such as Chrome) and will have to allow webcam access when prompted!
Some of his work is projected onto huge displays which is am amazing immersive experience!
On a related note, the new Panorama function in iOS 6 seems to turn the iPhone's camera into a slit scanner using the phone's accelerometer for the rotation rate to stitch together a pretty good panorama on the fly.
"...this technique uses spatial + temporal data stored in a 4D Space-Time Continuum, and 3 dimensional temporal gradients (i.e. not just slitscanning on the depth/rgb images, but surface-scanning on the animated 3D point cloud)."
I have a similar idea for one of the representations of where I'll be speaking:
BIOSPHERE - GENKAI-1
Official video by Egbert Mittelstädt From the album N-Plants
It's performed in the cinechamber which is four huge video walls with I think an eight speaker array. The time distortion is amazing and you are totally immersed.
It was featured in some website that made the rounds on reddit or slashdot or somewhere.
You can get the same effect with a flatbed scanner, which operates on the same principles but assumes a fixed subject, so the camera moves while scanning. I can't find a link now, but there is a fad of rolling your face on a scanner and sharing the result on a website.
Also, this is basically how a CMOS camera works, which is why you get a distortion effect (not jsut blur) when photographinc moving objects: https://www.google.com/search?q=apple+cmos+distortion