Laser Webcam Turntable Low cost 3D scanner Costs: Laser………….100euro Webcam………100euro Turntable……...150euro Side view Top view Object In order to perform.

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Presentation transcript:

Laser Webcam Turntable Low cost 3D scanner Costs: Laser………….100euro Webcam………100euro Turntable……...150euro Side view Top view Object In order to perform triangulation (line-plane intersection) all the devices must be calirated.

3D handmade grid cube with known 3D position The detected points are the measurements Camera Calibration Detected laser line with known world position. Laser plane calibration Laser with cylindrical lens. Subpixel peak detector Laser plane orientation is finally computed.

Turntable calibration (time) Turntable calibration (space) Point detector Ellipse detection Ellipse fitting Imaged center Assumption: Uniform Sampling Low jitter Constant velocity Frame Number SSD SSD (summed squared difference) all frames wrt the first.

Recontruction by Triangulation. We use the DirectShow API to acquire the video sequence. 320x240pixel 30fps And OpenCV for basic image processing. Point cloud Triangulated mesh

Point cloud Triangulated mesh Application: Orthopaedic Shoemaking Ortopedia Fiorentina (Firenze).