I have bought a digital USB microscope:
Which can take images like this:
I would like to measure – as accurately as possible – the width of the white line on screen, as you see in the picture.
Problems I'm having with the software:
- A ruler for Windows - Only measures in pixels
- JRuler - Only measures in mm.
- Paint.net - Only measures in mm.
- Photoshop - Divides mm in 5 which is quite good but not enough (not counting the price since it will only be used for measuring every now and then).
Is there a (preferably free) software that can measure with a precision of at least 1/10th of a millimetre?