IWR6843ISK: 3D People Counting - Post Processing Parsed Data

Sander De Stercke

Part Number: IWR6843ISK

Hey there,

I am Sander De Stercke Soft and Hardware engineer.

I am experimenting with the 3D People Counting Demo.
I have a decent understanding of how the module and data output works.
I am able to parse all data the module provides using python in dictionaries.

However after getting the data I am a bit confused on how to use the data to get tracking like the one in the demo visualiser.

I would like the tracking of this video/GIF:

link: https://dev.ti.com/tirex/explore/node?node=A__ANL8AwYMp.Qo2i.UiR1E3A__radar_toolbox__1AslXXD__LATEST

That means i want just one X Y Z coordinate of the tracked object and it saves that location until it starts moving again.

output of the python dictionaries:

Index is the Target index TLV but don really know what to do with it.
IDS is the track ID in the Target List TLV.

In the user guide i get this information about the data:

I dont really know how to use this info. And dont really understand the covariance matrix either and why it takes in so much space (64 Bytes).

Thanks in advance,

Sander De Stercke

over 2 years ago

0 Nathan Block over 2 years ago

TI__Mastermind 37805 points

Hi,

You can get the XYZ of each track using the Target List posX/posY/posZ as you have mentioned. I don't know how you generated that python output, but if you look at the visualizer code, you should be able to find the target list and export it however you see fit. The covariance matrix is explained in the Tracking Radar with Multiple Reflection Points pdf found here.

https://dev.ti.com/tirex/explore/node?node=A__APAFl-amXsEcKJ4q3oOjFw__radar_toolbox__1AslXXD__LATEST&r=1AslXXD__1.00.01.07

Best,

Nate

0 Sander De Stercke over 2 years ago in reply to Nathan Block

Prodigy 30 points

Hi Nate,

Thanks for your fast reply.
Ive uild a python script that connects with the radar and sends the config file.
After that the script just basically parses all data it recieves and stores it into a dictionary per frame.

IDS are the tid
X1 is the posX

Y2 is the posY
Z1 is the posZ

INDEX is that weird TLV that i dont undersand its purpose.

when i plot the track positions i receive from the radar. it doesnt really track verry wel.
sometimes it stops tracking people when they stand still or sometimes the radar doesnt track a person eventough he moves past.

I thought it had to do something with the index TLV.

Thanks for providing me the covariance matric explanation.

Best,

Sander

0 Nathan Block over 2 years ago in reply to Sander De Stercke

TI__Mastermind 37805 points

Sander De Stercke said:
INDEX is that weird TLV that i dont undersand its purpose.

Index is the trackID that identifies tracks over multiple frames. This is so you can keep track of multiple people at once.

Best,

Nate

0 Sander De Stercke over 2 years ago in reply to Nathan Block

Prodigy 30 points

Dear Nate,

WoW Thank you, I finnally noticed it is talking about the point cloud data.
I understand it now :)

Kind regards,
Sander

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IWR6843ISK: 3D People Counting - Post Processing Parsed Data