Marker Identification (V1)

The 3D Motion system is based on colour detection, so we need to teach the system which colours it is looking for. We’ve created an efficient process for setting the colour range.

After Bike Measurement you will arrive at the Calibration screen.

Step 1: Click on “RETRAIN” and ask the rider to begin pedalling.

A pop-up will appear named “Dot Detection”

The first step is to define the detection area. This is just the area that the markers appear in. If you think you will be changing the position significantly be sure to allow enough tolerance at the edges of the box to accommodate changes. This area should be much smaller than the overall capture area. You will still see the entire capture area in the analysis screen, defining a smaller detection area reduces the amount of data we need to process which increases the speed of the system.

Step 2: The screen will pause any time it can’t detect 7 markers. So you’ll see the rider frozen initially (they should still be pedalling at this stage). To progress:

Hover the green circle (that appears under the cursor) on one of the dots.

The video will cycle until the next frame in which it cannot detect 7 markers. Markers that are being detected will be highlighted in red.

Click on one of the markers that is not highlighted - this will expand the colour rangerepeat the process until the video is cycling continuously and the wireframe is always visible on the rider.

Note that if you click too many dots and it starts to detect other patches of colour you will need to click finish and begin the process again (by clicking “RETRAIN” again).

If you find at this stage that you can’t resolve on the marker colour without picking up other areas (the camera sees colours differently to the human eye) you may need to consider using a different marker colour (which is why we supply 4 colours in the Starter Pack).

In general we’d suggested starting with the Shoulder, Wrist and Ankle markers, as that will account for lighting gradient. In the images on this page you can see a noticeable difference in apparent colour between the Hip and Wrist markers which is an indicator that you will likely need to click on both.

It is worth asking your clients to come to the fit dressing in their least colourful clothing to avoid conflict with marker colours.

This video demonstrates the process.

Once you are satisfied that the wireframe is showing consistently you can move on to the next step.

Note that if light conditions change over the course of the fit you may need to revisit the Marker ID process.

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