Laserdetection #2
Wednesday 24 March 2010 at 8:18 pm
After calculating the line-data from the delta-image of the webcam, I figured out how to get to 3D-Coordinates from all data that is given:
- I know the position of the Line-Laser
- I know the rotation of the Laser
- I know the opening angles of the camera
- I know the lit pixels on screen
I made the model a bit simpler by assuming that the line-laser is absolutely vertical and is represented by a plane in space. The lit pixel from my screen is representing a ray through space. That ray can be calculated, if you know the opening angles of the camera.
The Intersection between the ray (from pixeldata) and the plane of the line-laser is a 3d-point in the real world where an object is actually scanned.
I used Java3D to represent the points in space. I will test it with a real laser and some motors to control the laser tomorrow. Here is an actual screenshot:
Stay tuned 
