sets the image pixels to real units eg mm or inches. With the ability to tweak as required
Creating a calibration
take the measurement betreen two geometric shapes
Save any defined geometries as an overlay's that can be loaded at will. These overlays can be edited external to the software as they are readable xml type files.. The location and scale can be adjusted using the calibration tweak tool (load overlay after bringing up the tweak)
Creating an overlay
creating an overlayin order to measure apart.
moving an overlay to check part accuracy of parts.