Webcam to detect pendant - turning an IPod type camera sitting on top of a stepper motor.Do you think you'll be using the webcam to detect the IR pendant, or is the webcam for filming and you're detecting with the photodiode idea?
I'm aiming to make the choice of recording equipment variable but plan a is to use an IPod - this is all going to be about trial and errorHow much resolution in the video do you need? Also the motion of the platform will not be smooth with simple servos
The idea of this is to lets teacher record their own lessons and just play them back without any need to edit at all and this is how a £9K commercial system does it - I'm just the monkey on this one - with a cool summer projectI am all for cool projects, but the simple way off the top of my head is to record the video as a wider shot and then just window in on the teacher at the edit stage. Or you could just let them wander around the screen.
I was thinking of ID badge size. The 'tennis ball' was only for illustration.simplesi wrote:@pigraham - ta - lots of things to think about At the end of the day, the thing its got to track has to be no bigger than an ID badge hung around the teacher's neck - I'm not allowed to dress them up in a bright pink tutu
Seriously - if you did make teachers dress that way, I'm sure the pupils will record their lessons for them!simplesi wrote:I'm not allowed to dress them up in a bright pink tutu
I searched out iRIS Connect and it seems to be much more than a video tracking system. If they are using IR marker tracking they don't mention it up front or show tracking shots in the demo video..Twinkletoes wrote:I've seen the iris system - it's a line of IR emitters in the neck cord on both sides with wide angle of view so you can still see them from the back of the cord when the teacher is turned away.
The plan is for teachers to decide to use it as self-feedback tool so high quality not essential.What is the feature list? How will it be used?
Why do you need to track at all?simplesi wrote:The plan is for teachers to decide to use it as self-feedback tool so high quality not essential.What is the feature list? How will it be used?
The commercial setup is one one of those things where its all about the software licensing as opposed to the technology. My head teacher thinks we can can come up with a simpler technological system but achieving 80% of results for about <5% of the price.
I like the idea of using fixed wide angle cam and then post-using using tracking info but then I've got the problem of how to automatically edit the video based on the data.
Simply moving the camera makes the project very easy
(showing my age?) Do teachers never wear jackets?rurwin wrote:What about using a belt of LEDs instead of a necklace? Belts are more symmetrically placed and are generally not obscured by hair etc.
Em - just a normal lesson - cause that's what the commercial £9K system uses so just trying to copy itCan you describe a typical scenario that requires tracked zoom?
I don't think that's going to work once the teacher start moving amongst the desks - that's why I need some sort of unique sourceReally, if you've already got the face tracking on the way then I think you're nearly there.
Why would you need to edit? I envisage recording wide in HD from several vantage points that will be accessible during review. Normally you see what's going on in the wide camera view from the back of the room. Occasionally you might want a close-up of the teacher (why?) and you can click to zoom the recorded video to get that when it's needed, rather than recording only a tight view of just the teacher and losing the class context.simplesi wrote:Em - just a normal lesson - cause that's what the commercial £9K system uses so just trying to copy itCan you describe a typical scenario that requires tracked zoom?
The simplicity of just using tracking is that there will be no need for any video editing (a skill that not many primary teachers usually have)
Obviously, I'm just trying to get the tracking bit working to see if that bits possible
I'm not going to argue with that. By all means do things that are cool and educational!simplesi wrote:Well - like its been said - its a cool little project
And I see that the knowledge I get from it might be useful for my robotic stuff