Scaling based on anthropometric data

Hi everybody,

I’m working on a standing-model based on anthropometric measurements.
In the scaling documentation you mention that your scaling examples
are based on anthropometric data of Ramsis, but I couldn’t find
specific information on that.

The second step will be a kinematic driven model, where I have to
decide which markers to use and how to drive the model with best
possible precision.

Questions:

  1. Which measurements do I have to export in Ramsis to define the
    lengths of segments in anyman.any?
  2. Could you please name the two limiting joints for each of the 8
    length measurements or point me in the right direction?
  3. The repository contains marker-sets, but I don’t understand yet,
    how those markers are linked to the joints. Do they just have a
    defined offset to the joint center?

Thanks for your help,
Robert

Hi Robert

Here are some answers to your questions:

The segmentation in the AnyMan.any files is created in a way that
allows users of Mannequin models such as Ramsis to export their
model into an AnyBody model of the same size.

The numbers however in the files in the AnyFamily directory do not
originate from Ramsis, these are just handmade examples created to
display the possibilities.

I am not a user of Ramsis so I am not able to answer which
measurements you will need to export, but I guess either joint
centers or segments lengths should be possible to export?.

  1. Here is a description of the various properties in the AnyMan.any
    file

ThighLength: This is the length from hipjoint center to knee joint
center
ShankLength: Length from KneeJoint center to Ankle joint center
FootLength: Length from Ankle joint center to a node named toe tip
which is located at the tip of the big toe. You can try to add
an AnyDrawRefFrame in this node to see it location.
PelvisWidth: Distance from Right hip joint center to left hip joint
center
TrunkHeight: Distance from C1HatNode joint to L5Sacrum joint
HeadHeight: Height in neutral position from C1HatNode to top of head
UpperArmLength: Distance from GH joint center to FE joint center
LowerArmLength: Distance from elbow joint center to wrist joint
center

I think it will be helpful for you to read the tutorial “Kinematic
measures” http://www.anybodytech.com/500.0.html

It displays on a simple one segment model how a marker can be used
for driving the model.

You can also have look at the gait webcast, the gait model is driven
by markers, it can be found at this address

http://www.anybodytech.com/fileadmin/webcasts/GaitWebcastAug06.pdf

(you will need to log into the members area of www.anybodytech.com
to see this, it is free)

Best regards

Søren

— In anyscript@yahoogroups.com, “robert.brauweiler”
<robert.brauweiler@…> wrote:
>
> Hi everybody,
>
> I’m working on a standing-model based on anthropometric
measurements.
> In the scaling documentation you mention that your scaling examples
> are based on anthropometric data of Ramsis, but I couldn’t find
> specific information on that.
>
> The second step will be a kinematic driven model, where I have to
> decide which markers to use and how to drive the model with best
> possible precision.
>
>
> Questions:
> 1) Which measurements do I have to export in Ramsis to define the
> lengths of segments in anyman.any?
> 2) Could you please name the two limiting joints for each of the 8
> length measurements or point me in the right direction?
> 3) The repository contains marker-sets, but I don’t understand yet,
> how those markers are linked to the joints. Do they just have a
> defined offset to the joint center?
>
> Thanks for your help,
> Robert
>