Hi,
I would like to create a program that does detect several hand gestures. I have 5 gestures which I would like to add to my program. The question is which method should i use to detect gestures?
Should I use PCL (Point Cloud Library) to detect the hand gestures? Is PCL build by OpenCV? What is the difference between OpenCV and PCL?
Thanks
Hi,
By hand gestures, if you mean:
Also, if you use dynamic gestures, use the skeleton (if you have access, for example with a Kinect-like device) and not only the position of the hand.
Finally, a presentation made by Microsoft for the Gamefest 2011 showing how they did gesture recognition using machine learning and depth information: Gesture detection using machine learning (but in your case it is a bit overkill as you don't have the material that Microsoft have).
And a paper showing how they did pose recognition using depth features and randomized decision forests: Real-Time Human Pose Recognition in Parts from Single Depth Images
OpenCV has some depth based image processing algorithms also, but if you really want to dig into point clouds from your 3D setup, than PCL library is indeed the way to go.
You have several questions, here are some answers:
Thanks a lot for the answer. I got a better understanding and a few more questions. In question 2 you wrote that If I would like to do more than I should use PCL. Could you give me examples with what you mean by more?
You wrote that PCL is not built by the OpenCV Library. What kind of connections do they have in between and why does PCL require OpenCV to be installed on the computer?
requires me to have both PCL and OpenCV installed?
If you want to perform operations on the actual 3D point cloud than you will need PCL. PCL has dedicated algorithms for that, as well as path planning in 3D space, 3D object matching, ... PCL requires OpenCV because internally it uses some of its 2D image processing techniques to achieve results on a 3D pointcloud. That is the only connection there exists. The other way around the OpenCV library is NOT dependent on PCL library. So in the case you want to use PCL, you indeed need both the PCL and the OpenCV library installed.
Asked: 2015-02-28 18:10:08 -0600
Seen: 2,083 times
Last updated: Mar 18 '15
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