Hardware manual

Specialized Drawer Impact Reference Guide
Datalogic Automation Inc. 3-218
Specialized Drawer
Change Image Calibration
In the Specialized Drawer
The Change Image Calibration tool is intended for use in situations where the camera or part moves to a new
position that requires a different calibration between camera snaps. The input image’s calibration data are
replaced with the calibration data stored in the tool. The camera’s calibration is not changed.
This tool has one input, the image, and no outputs.
Here is an example of using the Change Image Calibration tool.
This example assumes that there are two camera positions, A and B, and that the camera moves between
positions for each snap.
To set up the Change Image Calibration tool:
1. Create a task with the tools shown in the diagram. Create code in the Basic tool to keep track of the
current camera position so that the appropriate branch is taken in the Branch tool.
2. Position the camera and part at position B.
3. Use VPM Settings Tab - Camera - Setup - Calibration to calibrate the camera.
4. In this step, it is important that the Change Image Calibration tool does NOT run when the image is
snapped, that is, before it is trained. In VPM, snap the position B image. On the Change Image Calibra-
tion tool’s Properties tab, click the train button. The tool stores the calibration data for position B in the
tool.
5. Position the camera and part in position A.
6. Use VPM Settings Tab - Camera - Setup - Calibration to calibrate the camera again. This will store the
calibration data for position A in the Impact device.
7. Be sure that the input image for all image processing tools (in both branches) is linked to use the task
input image. Run the task.
The Basic tool keeps track of
the current camera position,
A or B.
If the camera is in position B,
the tool uses the current input
image, but changes its cali-
bration data.
If the camera is in
position A, the
remaining tools use
the image’s original
calibration data.