Image Calibration
The Choose a calibration type dialog box appears when you select Image Calibration in the Image tab of the Processing Functions palette or select Image»Image Calibration.
![]() |
Note To edit the settings in the Calibration and Calibration Axis tabs, click Edit Calibration to launch the Calibration wizard. |
Main Tab
The following control is available on the Main tab.
- Step Name—Name to give the step.
Calibration Tab
The following controls are available on the Calibration tab.
- Simple Calibration
- Pixel Type—Indicates if the image has square or nonsquare pixels.
- Correspondence Image - Real World—Gives the real-world size of a pixel in both the horizontal (x) and vertical (y) directions.
- User Points Calibration
- Calibration Points—Lists the points you selected for calibration in the Calibration wizard.
- Image Coordinates—Coordinates of the currently selected calibration point, given as the number of pixels from the origin.
- Real-World Coordinates—Coordinates of the currently selected calibration point, given as the number of Units from the origin.
- Unit—Unit of measure you selected in the Calibration wizard.
- Distortion—Type of distortion you selected in the Calibration wizard, either Perspective or Nonlinear.
- Grid Calibration
- Pixel Type—Indicates if the image has square or nonsquare pixels.
- Correspondence Image - Real World—Gives the real-world size of a pixel in both the horizontal (x) and vertical (y) directions.
- Unit—Unit of measure you selected in the Calibration wizard.
- Distortion—Type of distortion you selected in the Calibration wizard, either Perspective or Nonlinear.
- Edit Calibration—Displays the Calibration wizard, allowing you to modify the calibration settings you specified.
Axis Tab
The following controls are available on the Axis tab.
- Axis Origin—X- and y-coordinates of the origin you selected in the Calibration wizard.
- Axis Reference—Direction of the y-axis, either Direct or Indirect.
- Angle Relative to Horizontal—Angle of the x-axis of the calibration axis you selected relative to horizontal.
- Preview Corrected Image—Option to preview the image with perspective errors and lens distortion errors corrected.