Performing Calibration; Performing A Calibration - Mitsubishi Electric MELSENSOR VS70 Series Setting Manual / Spreadsheet

3.3

Performing Calibration

This section shows how to perform a calibration
*1 Lens radial distortion and inclination of a vision sensor can be adjusted.
1.
Place the CalibrateGrid function, and perform calibration. (Page 79 Performing a calibration)
2.
Place the TransformImage function, and generate a calibrated image. (Page 85 Generating a calibrated image)
3.
Place the TransPatternsToWorld function, and convert the unit of a coordinate value from pixels to the actual units.
(Page 87 Converting a unit)

Performing a calibration

Before performing a calibration
• The setup of a vision sensor and lens, and the physical relationship between the sensor and the scene being acquired must
be the same for both the calibration and run-time operation.
If any of these items is altered, the system must be re-calibrated.
• Place the calibration grid on the same plane as the object being inspected. When examining the top of the 3D object, the
calibration grid must be placed at the same height as the object.
• To improve the accuracy of a calibration, ensure that the image area is sufficiently covered by the grid pattern.
At least 100 features are required to be input.
Operation procedure
Operating procedure
1.
Select [Functions] tab  "Coordinate Transforms"  "Calibrate"  "CaribrateGrid" in the Palette window, and drag and
drop it to a spreadsheet.
*1
and how to use its result.
3 CREATING JOBS
3.3 Performing Calibration
3
79