thanks everyone's suggestion. I didn't have data in hand yesterday, so I tried to make it simple to understand. I have got some ideas for this question, but not sure this is good or not.
The image attached show how the measurement data looks like. The object being scanned is not a smoothed...
I am using a 2D laser scanner to scan a curved surface along it's longitude direction (y). This operation results in a point cloud in 3D space. At each y position, I can use least square to find a best fit curve in x,z axis, eg. a functin f(x). However, because of measurement noise, the...