DAVID SLS-2 Manual do Utilizador descarregar pdf (Página 7)

Scanning with

Scanning with Scanning with

Scanning with DAVID

DAVIDDAVID

DAVID

Launch DAVID by starting “Start_DAVID3“ or “Start_DAVID3_x64” on your DAVID USB key.

On the left side you can see the expandable main menus. Each menu is dedicated to one of the following work

steps, which you will usually walk through from top to bottom.

Our software is developed and improved continuously. Therefore, please use the automatic update, or

download and install updates manually from our website http://www.david- 3d .com/ . All updates within

versions 3.x are free of charge.

This printed manual refers to version 3.9 of the software and may already be out of date. Please also read our

detailed and always up-to-date online manual, which you can find on http://www.david- 3d .com/ .

Calibration of the Scanner

Calibration of the ScannerCalibration of the Scanner

Calibration of the Scanner

One advantage of the SLS-1's modular setup is that its size can be adjusted to very different object sizes.

Therefore, calibration (measurement of the current hardware setup in the DAVID software) is required,

allowing the software to obtain undistorted 3D data at the correct scale. We use a calibration corner as

reference, whose properties are known precisely.

1. Menu “ Hardware Setup “: Adjustment and settings of projector and camera

1. Select setup type “Structured Light Setup“.

2. Choose the correct “Screen ID“ such that the stripe pattern is projected by the projector.

3. Place the scanner in front of the scanned object and adjust the projector's position and direction so

that its projection illuminates the scanned surface – not less, but also not much more.

4. Use the projector's focus ring to adjust sharpness, such that the black and white stripes are almost

perfectly focused on the object surface. If the projector is perfectly focused, the fine lines between

the projector's pixels may cause a fine noise in the scan, so we recommend to set the projection

slightly out of focus. This will not reduce the scan quality.

5. Below “Camera”, select your camera (DAVID-CAM-3-M). You will see the live view. If necessary,

roughly adjust the camera's mechanic aperture and focus ring.

6. Aim the camera so that it can see the projected pattern on the object. Then fix the ball joint.

If the camera view and/or projector beam obtains much more than the scanned surface, you should

reduce the distance between scanner and object (step 3).

7. The Exposure Time should be set to the same value as the projector frame rate (usually 1/60s),

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