[ANSWERED] Motion tracking

Michel

If I look at your patch and read what you want, you don't need the eyes actor. The eyes actor gives you numbers not video/ghost image. In your patch you get the untouched video on the preview window because you have connected the "video in watcher" directly to the projector and nothing else.

If you use a normal usb webcam you will have problems controlling the mask with the difference actor. Because of it's automatic fps and blend settings it will brake your freeze grab and the life input that get mixed. Use a camera where you have control over the settings and a capture device.

Next to all I wrote above, I sat at least 30 minutes to try to get a mask with the above approach, so you only see the dancer. I had no success.

Best Michel

Woland

try

Video In Watcher > Difference > Motion Blur (set top parameter to “100” > Projector actor

Vidasonik

@woland Thanks! Yes this is what I used to do - which is fine - but you get all the background along with the dancer.

I need to differentiate the dancer from the background which is why it seems to make sense to take a freeze shot of background WITHOUT dancer and then Izzy can subtract what remains UNCHANGED from the moving body! Graham Thorne showed me this freeze/eyes etc routine but I can't get it to work as I have said.

I use the web cam recommended in Izzy manual - I think its an HP one.

Vidasonik

O yes here is the patch that works pretty well but still some background:

Vidasonik

sorry didn't seem to attach anything!

Skulpture

Hi.

Might sound obvious but you have to take the background image (by pressing P) with your body out of the live feed video.

Also remove the Live feed video out from the projector and connect it to the Effect Mixer Video out - you will see the result.

Vidasonik

I just did this and this is the result!?

Vidasonik

yes I've pressing 'p' after removing myself from the camera frame!

Michel

@vidasonik

As I wrote in my post above I don't think you will get what you want this way. Next to that, if you leave the setting "additive" in the blend mode of the projector it will definitely not work as you want.

Best Michel

DusX

@vidasonik

You may find you can clean away the background (somewhat) by adding a threshold actor.
Additionally, a Contrast actor, may allow you to 'tune out' the background shades as well.
Its possible (depends on what you really want) that the TT Edge Detect glsl shader (requires downloading the bundle from the Plugins section) may provide some of what you want.

Vidasonik

Cheers for that! Graham - you made it seem so easy!!!

crystalhorizon

@vidasonik said:

Cheers for that! Graham - you made it seem so easy!!!

Thats Graham

Vidasonik

Yes, but what he made 'seem' easy is, evidently, 'actually' impossible !

Woland

@vidasonik

I don’t know about impossible. What aspect of what you’re trying to do haven’t you been able to accomplish yet? We’re here to help.

Best wishes,

Woland

Michel

@woland

I guess what he wants to do is isolate a person/dancer with a normal web camera and put him over a background video/picture. And to be honest with that setup it will be more a tinkery unsatisfying solution.

Best Michel

Skulpture

Working fine for me...

Skulpture

@vidasonik said:

I just did this and this is the result!?

This isnt working because you have two projectors; one clean feed from the live feed and one from the background subtraction.

I have just opened your 'graham.izz' patch and it worked first time.

Open the patch - step out of the way of the camera - press P to take a still image. Then move into the frame.

Michel

@skulpture

Well its not a clear isolation from the background but some fancy difference effect on the person. But maybe this is what he is looking for.

And still to say with a camera set to automatic you will not have a clean cut out if it sets the blend to a different value.

Best Michel

Vidasonik

@skulpture just did this - and again I just get a picture of me with background !!??

Skulpture

@vidasonik

Delete this line.