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From 6.2 to 7.5 : Coordinate system hell

By Ange3d on Tue, 10/16/2018 - 14:39

Hi,

I'm currently trying to migrate my application from Vuforia 6.2 to 7.5 and I do not understand how coordinate system have been changed : 

According to this documentation https://library.vuforia.com/articles/Solution/how-migrate-vuforia-7_2.html I understand that camera have its own pose, Image tracker too and both are relative to a new World coordinate system.

But, looking at the documentation, when I'm trying to get camera's position in the ImageTraker coordinate system, documentation remain unchanged from 6.2 : https://library.vuforia.com/content/vuforia-library/en/articles/Solution/Working-with-the-Camera.html#How-To-Determine-Camera-Pose

 

So, How can I get the (M)VP matrix from ImageTracker now with 7.5 ?

 

Thanks for your help !

Hello,

This may be an oversight in our documentation not being updated. Let me investigate further and I will respond back here.

Thanks,

Vuforia Engine Support

Hello,

While we review the documentation separately, it was suggested that you review our samples (Image Targets feature): https://developer.vuforia.com/downloads/samples

Hello,

Thanks for this answer, I'll have a look right now.

Anyway, could you give me a little bit of details about World and Pose ? 

Hello,

Confused by your response. Perhaps if you can describe what you're trying to do, or what information you need from Vuforia, we can better help.

Thanks,

Vuforia Engine Support

Hi,

Sorry, I'll try to explain better : 

For my Vuforia usage, I need to get camera's position/orientation from tracked Image. When the image is tracked, I virtually consider the image as the 0,0,0 of the World coordinate system.

medabit

Thu, 10/18/2018 - 17:30

Permalink

Hello,

Thanks for the detailed response. Apologies but this is not my strong suit and I'm trying to translate the answers I'm getting from the dev team.

Hello,

I let this issue behin me to works on a few other things, but know time has come and I really would like to make my Vuforia's migration from 6.2 works.

Here is the 7.5 diagram : 

Is it possible to get the camera distance from the image target (X,Y,Z values) as real distance in meters and show them on screen even if the camera is not in from of the image target?