High speed camera syncing

Cormdogg

Hi
I have a technical question if you have time someone might be able to help me with, perhaps maybe could answer themselves or put me in contact with someone who might be in the know,
It's basically the possibility of syncing a high speed camera with a screen displaying flashing images at high speed.

For part of a project I'm working on for college we have invented a competition where people enter a photograph of themselves that will be shown at a fashion show in new york
Then for example there are 900 winners. Each photo will be shown on a large screen at the show.

The plan is then that the images are displayed over 3 minutes so flickering at 100 images per minute.

Would it be possible to programme a camera to take photos of the screen at 100 frames per minute?

The idea is that the winners get a print of themselves on screen at the show.

The jist being, you enter with the premise that you will be part of the g-star new york fashion show. You enter the competition with a photo of yourself.
You watch the show and when your image appears on the screen a camera takes a picture from somewhere in the room of the show and your face on a big screen,
We plan to 3001 images over 3.5 minutes.

Would it be doable using some sort of algorithm and database of the images to sync everything and the entrants receive a digital shot of the image. If their image of course is cross referenced in some database a number or something?

We've researched that there are cameras that can do this and you can display anything on screen at that rate but we would love an experts opinion.

Thanks

The Snipe

I'd say, you'd need to buy a highspeed video camera tbh, and then go through it frame for frame.

5uspect

I'm very confused, you really haven't explained yourself clearly . Why do you want to take photos of a screen with photos you already have? Do you want a panorama of the event with the person's image somewhere in the shot?

If this is the case you can just use a simple script to drive both the sideshow advance and the camera shutter.

You also say there are 900 winners but then you say you want to show 3001 images in 3 and a half minutes (14 images per second). Do you mean 300 images in three minutes? If it's 100 images per minute then the frame rate is much more reasonable and any SLR should be able to keep to with that frame rate.

Kenny Logins

The Snipe wrote: »

I'd say, you'd need to buy a highspeed video camera tbh, and then go through it frame for frame.

Is 100 frames per minute high speed..?

The Snipe

AFAIK, normal HD Video is only 60fps, so I'd imadgine a HS Camera would do 100 :P

5uspect

per minute...

The high speed camera in my old lab could do 5k fps at 512 x 512 (200k at 512 x 4). It was so much fun!

120 per minute would be 2 photos per second. That's more than you need.

Most DSLRs should be capable of this on burst mode, but what you really need is a good memory card, or a newer camera and set it to take medium sized Jpeg-only shots (so it doesn't clog up the buffer and cause you to miss most of your shots).


A tripod and an intervalometer would be on my to get list. And lots of practice. This would be a stressful job with lots of pressure, I'd imagine.

5uspect

Deleted User wrote: »

120 per minute would be 2 photos per second. That's more than you need.

Most DSLRs should be capable of this on burst mode, but what you really need is a good memory card, or a newer camera and set it to take medium sized Jpeg-only shots (so it doesn't clog up the buffer and cause you to miss most of your shots).


A tripod and an intervalometer would be on my to get list. And lots of practice. This would be a stressful job with lots of pressure, I'd imagine.

But if the camera is tethered to a PC and you have a script to advance the slideshow and trigger the camera then it's a non-issue.

Something like this for example:
http://chdk.wikia.com/wiki/UBASIC/Scripts:_OMNI_Intervalometer

5uspect

5uspect wrote: »

But if the camera is tethered to a PC and you have a script to advance the slideshow and trigger the camera then it's a non-issue.

Something like this for example:
http://chdk.wikia.com/wiki/UBASIC/Scripts:_OMNI_Intervalometer

Personally, I'd look at that as complicating a rather simple process. If something goes wrong there, you're pulling out USB cords and such to get the camera back working normally again, no?

Whereas the other way would be to just use the camera as normal and attach an intervalometer to fire off twice a second?

5uspect

It's just as likely for your intervalometer to go wrong I'd say. You could even rig the camera to take an analogue signal form the computer rathr than use USB.

Or even have the sideshow advance based on a signal from a remote camera trigger.

This is a task that cries out for simple automation, not stress.