Leon

Hi I am very new to the world of Max MSP and jitter and could desperately use some guidance.

I am currently using cv.jit.track to track movement from my webcam.

What I would like to do is use the coordinates that are stored in the jit.cellblocks as the object track movement and feed those coordinates into the frequency or pitch of an oscillator or the cut off of a filter.

My goal was to use the X - axis coordinates to control the frequency of pitch and the Y - axis to control either amplitude of filter cutoff.

I cannot find a way to get the coordinates from the jit.cellblock into the frequency of my oscillator can anyone explain why this is and how I can overcome this.

I am currently using cv.jit.track to track movement from my webcam. 

What I would like to do is use the coordinates that are stored in the jit.cellblocks as the object track movement and feed those coordinates into the frequency or pitch of an oscillator or the cut off of a filter. 

cv-jit-track-to-control-an-oscillator

Send your jitter matrix to a jit.iter object. This will translate the matrix into max messages that you can unpack and use to drive MSP stuff.

Thanks that has helped a lot I think I can now complete my patch thanks again for that piece of info.

by the way, does anyone know how to output the coordinates from 

different points using "cv.jit.track @npoints 3" ..??..

i tried different ways with jit.iter and search here but i guess i'm 

still confused by how to ouptuts those points out of a matrix..

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"cv.jit.track" returns a 3-plane float32 matrix that is as wide as 

the number of points specified by "npoints".

The first two planes contain the x and y coordinates of each point, 

while the third plane holds each point's status. This is usually 

equal to 1, but can also be 0 if a point is lost. The algorithm will 

try to track from its last valid position, so you may choose to 

/////////////////////////////////////////////////

>Thanks that has helped a lot I think I can now complete my patch 

by the way, does anyone know how to output the coordinates from 
different points using "cv.jit.track @npoints 3" ..??..
i tried different ways with jit.iter and search here but i guess i'm 
still confused by how to ouptuts those points out of a matrix..

///////////////////////////////////////////////////
in the help file of cv.jit.track :
"cv.jit.track" returns a 3-plane float32 matrix that is as wide as 
the number of points specified by "npoints".

The first two planes contain the x and y coordinates of each point, 
while the third plane holds each point's status. This is usually 
equal to 1, but can also be 0 if a point is lost. The algorithm will 
try to track from its last valid position, so you may choose to 
ignore this value.
/////////////////////////////////////////////////

>Thanks that has helped a lot I think I can now complete my patch 
>thanks again for that piece of info.


cv.jit.track to control an oscillator