ICE - point cloud follow image sequence

[Nick3d]

Hello everyone,

I'm trying to understand a little bit better ICE by watching some of the tutorials online. My goal is basically to get information data from an images sequence.
Basically I have to set up a point cloud that would follow an object on the texture map based on the object colour.
I was able to gather the color information using a texture map in ICE, but right now I don't know how to go on...this mean that I don't know how to "link" the point cloud to the colour on the texture frame-by-frame.

So, is there a way to "stick" the point cloud to the colour automatically and then set that position frame-by-frame?

Sorry but I'm still learning, and I have a lot to learn, to a little help is welcome

Cheers

EDIT: Could some moderator move the discussione under ICE general please

Moderator edit: Done! - HB

[Tekano]

hi Nick3D

all of this is possible in ICE

few issues I see here with your strategies that you need to clarify before proceeding.

Are you wanting to emit particles that live for one frame only for every frame of the image sequence? this is very easy.

or, harder to accomplish but certainly achievable, do you want to emit an initial amount of particles that live throughout the sequence and try to move to the nearest pixel / location that has the color vaules that you specify?

to link from particle position to color of texture map... are the particles emitted from an object with the texture map or are to travel towards the object with the texture map?

*hint* think about changing the RGB value to a scalar and using this as a weight for a goal or target?

[Nick3d]

hi Nick3D

all of this is possible in ICE

few issues I see here with your strategies that you need to clarify before proceeding.

Are you wanting to emit particles that live for one frame only for every frame of the image sequence? this is very easy.

or, harder to accomplish but certainly achievable, do you want to emit an initial amount of particles that live throughout the sequence and try to move to the nearest pixel / location that has the color vaules that you specify?

to link from particle position to color of texture map... are the particles emitted from an object with the texture map or are to travel towards the object with the texture map?

*hint* think about changing the RGB value to a scalar and using this as a weight for a goal or target?

Thanks for the answer

I just looked at a tutorial made by Paul Smith that is reeeeeeaaally helpful
https://vimeo.com/19171808
He use color values to drive (move) the Y value

Basically it would follow the same principle, and he actually did a tracker for the face that works really nice, but instead of just have the compound and use it I would like to built it in order to understand exactly what's going on and be able to modify it whenever I want.

I have lots of questions, but before that I think that I'll do some tests to asnwer to some of my questions, and if I'm stuck I'll probably ask for help again

ICE is pretty amazing by the way ;)

[Butachan]

YES! see all tutorials from Paul he plays a lot with color information there is also a compound out therein rray.de called Image ICE Node that could get you started. Your project seems like something I will really like to see the result so keep us posted!