Hi. yes i'm working with both softwares also. Could specify the troubles?

After markers identification, the markers displaced & jump to other side or to other segments and that happened just when we capture children.... Am not sure if that software programs or due to camera positions ??

I think it happens because at least 3 cameras cannot identify correctly each marker, due to artifacts present in the lab (for example to much light). The solution is to re-identify the marker in the right frame and/or eliminate the gap-filled trajectories and calculate them again.

Hope my answer was usefull for you.

Best regards

Marco Branco

Thanks Marco, in vicon its enough 2 cameras to identify each marker...i dnt know why with Qualysis need 3 cameras to identify each..?? i will send you diagram of the lab to get your opinion regarding its setting..

Here is diagram for our lab..

In my opinion, I shifted two cameras to the side of the laboratory and placed at least two other lower in order to ensure the capture of foot markers. That is, the cameras were arranged in a circle and at different heighs.

But this provision depends largely on the type of task.

If your problem happens mostly with children, it could be because they are lower in heigh, and you may try to lower some cameras.

Best regards

we tried before to have 3 cameras a side but the problem that width of the lab is 4,5 meters and benefits from cameras on the sides very limited to the summation of field that match ground reaction force..

i will try to lower 2 of them...

do you have any articles or text about ideal setting of lab cameras? to be guidelines instead of trial and errors..?

Thx

Only have the manuals and brochores of the QTM and V3D, and you can download them directly from website.

i have it....our engineer will fly to them in Sweden next week to get answer about many technical points..

would like to have your e-mail, skype or facebook account to keep in touch

Ok, my email is " [email protected] ".

Best regards