hi all,
my first post, been thinking of getting a reprap
I've been thinking of what to do with my two different systems using laser line pointer. If there's interest, I'd try to comment the code, write docs.
The more sophisticated version is from a document I found, while scouring the net for info about 3d-scanners. I'm on my macbook, and don't have the paper now. But, it consists of four bars pointing upwards in the the corners of a square plate. The camera sees the laser in all four bars plus the object. Doing math the 3d-coords of the object can by found. The world coordinates of the bars are known by measuring them, so the object gets the real 3d-coords. And a big plus is, that knowing the world 3d-coords of the bars, system calibrates extrinsic parameters automatically. I've tried David and Parsley, but the calibration never works.
Another, much simpler is a version of the makescanner. Only a white board behind the object is needed, and the laser is turned connected to a pivot. I used stepper motor and ChipKit, but can be turned by hand also, webcam reads the line on the board and the object. Knowing the distance between laser and camera, 3d-coords can be found. But not true 3d world coords.
I have so much things to do, so I wont' begin to polish the code (build nice guis etc.), or maintaing it, so if there are any takers, I'd gladly give the code (GPL, opencv, works on any platform opencv does) and the instructions.
best
-matti
trying to struggle almost all art forms
my first post, been thinking of getting a reprap
I've been thinking of what to do with my two different systems using laser line pointer. If there's interest, I'd try to comment the code, write docs.
The more sophisticated version is from a document I found, while scouring the net for info about 3d-scanners. I'm on my macbook, and don't have the paper now. But, it consists of four bars pointing upwards in the the corners of a square plate. The camera sees the laser in all four bars plus the object. Doing math the 3d-coords of the object can by found. The world coordinates of the bars are known by measuring them, so the object gets the real 3d-coords. And a big plus is, that knowing the world 3d-coords of the bars, system calibrates extrinsic parameters automatically. I've tried David and Parsley, but the calibration never works.
Another, much simpler is a version of the makescanner. Only a white board behind the object is needed, and the laser is turned connected to a pivot. I used stepper motor and ChipKit, but can be turned by hand also, webcam reads the line on the board and the object. Knowing the distance between laser and camera, 3d-coords can be found. But not true 3d world coords.
I have so much things to do, so I wont' begin to polish the code (build nice guis etc.), or maintaing it, so if there are any takers, I'd gladly give the code (GPL, opencv, works on any platform opencv does) and the instructions.
best
-matti
trying to struggle almost all art forms