Operation Manual

© proDAD GmbH
11
Useful Tips for the Calibration of your Camera.
To achieve a precise analysis for the calibration of your camera/lens, please bear in mind the
following tips
(Steps 1 and 2 need to be carried out in one single video, i.e. without interrupting the recording!):
1. First, move the camera beyond all the edges of the calibration grid (chessboard) (top, bottom,
right, left, beyond every corner), ALWAYS aiming at the centre of the chessboard so as to achieve
a movement of the camera towards the centre of the chessboard pattern!
2. Then move the camera beyond all the edges of the calibration grid (top, bottom, right, left,
beyond every corner), WITHOUT aiming at the centre of the chessboard. Hold the camera straight
instead!
3. Film the chessboard as large as possible, covering the whole area in recording!
4. Film the chessboard as sharp as possible.
5. Intend to use always short shutter speed, i.e. under good conditions of illumination.
6. Avoid constant shaking of the camera or stop moving it when capturing the chessboard. Thus,
the following analysis will lead to better results because the images are recognized more clearly.
7. In case that your camera does not dispose of a preview display, film the chessboard from
various distances moving it towards the monitor in one single Video clip. The ideal way of doing it
is to capture every camera movement subsequently starting from close and removing the camera
slowly and thus enhancing the distance to the chessboard and pausing every now and then.
In the Tips register you'll find an Instruction Video, which explains how to capture the
Calibration Grid.