Chris

First time post, as I can usually figure some of these things on my own. This time I'm hoping the internet can provide some ideas.

I'm currently working on a project where I'm trying to manipulate an object based on using cv.jit.touches from the cv.jit package. What I'm hoping to do is track blobs from a camera and interpret the movement of those blobs as if they were touches on a touch screen, like an iPad. So a blob moving from left to right would be interpreted as simple drag from one point to another, and potentially rotate an object in OpenGL. What I'm struggling with is working with multiple blobs, and interpreting their movement as something like a pinch to zoom out, or the opposite to zoom in. Has anyone ever experimented before with this idea, or have any idea if it can be done? Any and all help and advice is incredibly appreciated. Cheers!

First time post, as I can usually figure some of these things on my own. This time I'm hoping the internet can provide some ideas. 

I'm currently working on a project where I'm trying to manipulate an object based on using cv.jit.touches from the cv.jit package. What I'm hoping to do is track blobs from a camera and interpret the movement of those blobs as if they were touches on a touch screen, like an iPad. So a blob moving from left to right would be interpreted as simple drag from one point to another, and potentially rotate an object in OpenGL. What I'm struggling with is working with multiple blobs, and interpreting their movement as something like a pinch to zoom out, or the opposite to zoom in. Has anyone ever experimented before with this idea, or have any idea if it can be done? Any and all help and advice is incredibly appreciated. Cheers!


tracking-blobs-converting-tracking-gestures

I guess you could do this by measuring the distance between the centroids of the blobs. If this gets wider, zoom in, else zoom out.

Any ideas on what would be the best way to measure that distance? Like any object suggestions? I'm trying currently to see if I can get some output data from the locations of each centroid, I just haven't a clue going about getting it to measure distance between the two.

(sorry, this delayed post is coming a month late, its been a very busy couple of weeks)

Any ideas on what would be the best way to measure that distance? Like any object suggestions? I'm trying currently to see if I can get some output data from the locations of each centroid, I just haven't a clue going about getting it to measure distance between the two. 

(sorry, this delayed post is coming a month late, its been a very busy couple of weeks)


Tracking Blobs and converting that tracking into gestures