Basically, I am new to 3D motion analysis and trying to figure out how to do it. This said, I lack basic knowledge regarding the issue. I only have experience with 2D gait analysis.
Say I already have video recording from multiple angles (and this is all I have), including video recordings for calibration purposes, and I now want to analyze a quadrupedal animal's motion, mainly focusing on joint movements of the limbs, and gait.
How would I proceed with this? What skills should I learn, what software should I use? File formats?
I am aware of this program:
http://www.dkh.co.jp/en/product/framedias5_top.html
But we do not have the budget to acquire it. So I am looking for workarounds and open-source/free programs.
I don't mind the learning curve or the requirements, I just need to figure out a way to do this.
Many thanks for your help. I am looking forward to your suggestions and comments.
P.S. I have tried SkillSpector, but I cannot import the videos. I tried several codecs/containers, but it just won't recognize them.
Depending on your needs and what you want to analyze if you have access to matlab program
You can create a routine and create your own software based on your needs.
take a look at the image processing matlab and 3D reconstruction tools, it can help you.
Hi,
Have you tried with Kinovea?
http://www.kinovea.org/
i don't remember whether it analyze also 3d models.
By surfing on the web i found this
http://www.mi-as.com/applications/sport-analysis-and-performance/
We are working on the lizard display using 3D motion analysis. As I know the best and novel way to digitize 3D motion is to use the DLTdv packages developed in Matlab platform. You should use the Matlab version12 or after than that, because DLTdv needs to use some new equipment developed in recent Matlab. Hope this will help you.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3740380/
3D Tracking of Mating Events in Wild Swarms of the Malaria Mosquito Anopheles gambiae
hello Nikolaos
I used Kinovea (freeware) to retrieve the target coordinates in 2D on both camera.
Then I concatenate two 2D data with a DLT (direct linear transformation) to obtain 3D with matlab, labview or openCV (freeware) script
Abdel- Aziz Y. I, Karara H.M., 1971. Direct Linear Transformation from Comparator Coordinates into ObjectSpace Coordinates.ASP Symposium on Close- Range Photogrammtery, Falls Church, VA, pp.1-18.
http://bardsley.org.uk/wp-content/uploads/2007/02/3d-reconstruction-using-the-direct-linear-transform.pdf
http://books.google.fr/books?id=yY8RB_yN9k0C&pg=PA101&lpg=PA101&dq=abdel+aziz+dlt&source=bl&ots=fz3D5gTkMb&sig=Urbdn5Merbkb4g0y3pIW-o5Y7do&hl=fr&sa=X&ei=6ZcqVNTvG6LC7gaG0oCoDg&ved=0CEUQ6AEwBA#v=onepage&q=abdel%20aziz%20dlt&f=false
enjoy
Patrick
Institut of Mouvement SciencesMarseille, France
Hello, I would recommend Belnder, the ultimate open-source solution for all 3d work. The learning curve is steep and long, but it has some really powerful features, including a very good motion tracking "module". For further information, you may want to visit the wiki site http://wiki.blender.org/index.php/Doc:2.6/Manual/Motion_Tracking
and there are tons of quality video tutorials to make it easier. Give a try for this one first:
https://www.youtube.com/watch?v=CVPcT0dJmoY
For motion tracking:
https://www.youtube.com/watch?v=ljBHGAZENO4
Edit: and of course, much depends on your footage. If they are not appropriate, there is no software which would be able to analize them.
Another vote for Kinovea. It is extremely powerful and flexible, especially given its cost (free)!
First, for the three dimensional analysis of motion, you need at least:
- two video cameras (angle between them (60-120º)
- a reference system (For example, cube-shaped structure) whose active volume-wide movement to analyze.
- software for reconstruct the three-dimensional coordinates through some algorithms ( for example, Direct Linear Transformation (DLT), is common biomechanics)
I recommend you use the DLTdv packages developed in Matlab platform or MAXTRAQ 3D software (Commercial) .
Good luck!
Jorge
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