The Mixed Reality Forums here are no longer being used or maintained.
There are a few other places we would like to direct you to for support, both from Microsoft and from the community.
The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.
For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality.
If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers, or in our Microsoft Tech Communities forums at https://techcommunity.microsoft.com/t5/mixed-reality/ct-p/MicrosoftMixedReality.
And always feel free to hit us up on Twitter @MxdRealityDev.
Projection matrix
Hello everyone,
I am currently trying to figure out the full projection matrix P for a given image, such that
w * [u,v,1] = P * [x,y,z,1]
,where P is a 3x4 projection matrix, u and v are the image coordinates and x,y,z are the world coordinates of the imaged point. So I took a photo (small application written with Unity and C#) and tried to get cameraToWorldMatrix as well as projectionMatrix with
photoCaptureFrame.TryGetCameraToWorldMatrix(...);
photoCaptureFrame.TryGetProjectionMatrix(...);
Initially I thought that now P = projectionMatrix * inverse(cameraToWorldMatrix), but this seems not to be correct. Because of the format of the projection matrix (https://developer.microsoft.com/en-us/windows/mixed-reality/locatable_camera) I also end up with a 4x4 matrix instead of the desired 3x4 matrix.
Can anyone give me a hint how to finally compute the matrix P?