Photo booth like removing background
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Hi !
oh that's a brilliant idea ! Yes my background is static, I should have think of freeze & difference, I'll try as soon as possible but I think you solved my problem !thanks for your rapidité, merci beaucoup -
Did you consider using kinect? Possibly kinect augmented with a DSLR (if you need high resolution RGB)?
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I have done this rather easily with a Kinect. Fred's kinect server will actually do this for you automatically.
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Thanks eight & Matthew for the Kinect tip. Yes I have Kinects but I never used it within Isadora so that mean that I'm really a very beginner in that. I couldn't find in the forum something like "how to use a kinect…" is there something like that somewhere ? If you say it's rather easy, it sound good to me. I didn't find "Fred's kinect server" you're talking about, am I searching the wrong way ?
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@monsieurmeus check old forum, I think all of the kinect patches are there: you would need a mac though, because those patches rely on a QC patch and a plugin.
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@Skulpture
Hi again, sorry to bother you again for something so simple, but, I still get my background in transparency using the technique like you said… It must be simple but still can't find the way like this, I hope I don't have to use a kinect method for that.
sorry again…
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You need to trigger ”grab”(I have generator, but can be anything like keyboard watcher etc) and video you grabbing from goes to first input.
Also I have made it into user actor - it is so basic that you need it almost always for tracking. -
Yes. Move out of the way of the camera then somehow (without the camera not seeing you!) press 'grab' on the freeze actor and then move back into the frame.
It's a start.. you then might need to look at making it look much better. -
thanks a lot for your help and your rapidity! but I still don"t find how to make the image look normal, I mean, not transparent with negative colors…
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and maybe you can help me also to find the Kinecttoizzy QC plugin, I search and search and can't find it to download… new or old forum… sorry again
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EDIT: don't use this method.. its an unfortunate early attempt ;)
I have added something just like this to my livefeed option in SYST3M, unfortunatly the next version its far from ready to share (not working perfect yet).
I think what you want to do is (at least what i did) is use a buffer actor to stream into your difference actor.
Your buffer needs to be 2 frames and being filled with the freeze frame and your live feed, alternating at the same rate as your FPS (I used the 'Performance Monitor' to set the rate of a Pulse actor->counter->selector. there might be easier ways).
Since the difference actor looks at 2 frames (in sequence) of 1 video stream.
This will give you a black and white video stream of the 'change', which should be you.
You can then use this stream to add an alpha or mask your stream onto another background.I'm attaching a screen grab of a sample.
You can see that I stopped using the pulse as the trigger, since the live feedfeed seemed not to be the same FPS as my stage.
In anycase this is kind of working.. but I have a fast video flicker.. this might be an issue with my buffer setup.. not sure.
Its a start.
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try my sample patch
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Heres one that is working pretty well for me.
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note: like Skulpture mentioned before, you need to grab a freeze frame that is of the static background first..
then you may need to play with the threshold and other actor settings to tune it up. -
and it does help to switch the camera from automatic to manual settings.
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I like @DusX solution using the AlphaMask!
* I might have to recreate that patch and steal it for my collection ;) * -
if lighting changes you will also need to grab a fresh background frame - depending on your situation it may make sense to grab a fresh background frame whenever the total movement in the frame is less than a threshold - this will help protect against slowly changing light levels
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@nick I was thinking of adding a motion detection based reset as well, good call, since half the work is already done.
@Skulpture go to it.. would love to see what you are able to add to it.
@Michel you are so right I was just playing with this with a cheap webcam that is all auto focus, auto white balance etc.. and it simply didn't work at all anymore. -
yep - movement or light changing are our descriptions of how a difference has been generated, as far as isadora is concerned they are both just differences in pixels across the frame
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Hi everybody, thanks so much for your help, I'd like to invinte you all to drink a pastis in the sun but I can't upload the bottle…
A question remains to me is the blinking effect, how do you get rid of that ? I tried a pulse generator, but I still get my selector slowly switching from 1 to 2 with unregular rhythm, my computer is also slowing down to 10fps…
