I’m trying to do image detection using OpenCV and my ZedMini to place game objects in front of specific images, like OpenCV: Basic concepts of the homography explained with code first example of “How the homography transformation can be useful?”.
I used feature detection with the data from the ZEDToOpenCVRetriever script to find my image which works.
But i’m having an hard time finding a way to get the world pose of the image so i can place my object.
I think using homography (with perspectiveTranform()) is the way to go, but i don’t understand quite well how to use the homography matrix to find my image position.
This looks a lot like the Simple Marker Placement scene under Assets/ZED/Examples/OpenCV ArUco Detection/Scenes/. You will find an example applied to ArUco markers, but you might be able to transpose it for your particular case.
Yeah, it’s the first thing i looked into but the ArUco example uses aruco_Aruco_estimatePoseSingleMarkers_12() to find the pose of the marker in the real world and I can’t see how it works.
@NicolasReboule
Sorry, I can’t really help with this.
You may found more information directly in openCV source code, and by examining the parameters used in the estimatePoseSingleMarkers call.
I hope that helps a bit, do not hesitate if you have more specific questions.
