Technical Specs

Step 2: Verify calibration
In the second step, the current calibration can be verified. To perform the verification, the grid must be held such
that it is simultaneously visible in both cameras. Make sure that all black squares of the grid are completely
visible and not occluded. A green check mark overlays each correctly detected square. The correct detection of
the grid is only possible if all of the black squares are detected. After the grid is detected, the calibration error is
automatically computed, and the result is displayed on the screen.
Fig. 6.6.2: Verification of calibration
Some of the squares not being detected, or being detected only briefly might indicate a low-quality or damaged
calibration grid, or bad lighting conditions.
Note: To compute a meaningful calibration error, the grid should be held as closely as possible to the cameras.
If the grid only covers a small section of the camera images, the calibration error will always be less than when
the grid covers the full image.
The typical calibration error is around 0.3 pixels. If the error is less than 0.4 to 0.5 pixels, then the calibration
procedure can be skipped. If the calibration error is greater, the calibration procedure should be performed to
guarantee full sensor performance. The button Next starts the procedure.
6.6. Camera calibration 50