How to change the spatial calibration
When the image does not contain a default spatial calibration and it contains a ruler (or other element allowing to determine a known distance) then you can apply a calibration manually:
- Select a line in the Measurement Tool
- Draw a line on an object with a known distance
- Right-click on the selected line and enter the distance on the Manual Calibration window
The calibration can be applied only to the current image or to all the images belonging to the series.