I'm looking for a software which enables to measure a distance in an image.
Something in the style on Photoshop's ruler and 'guides' system is what I have in mind (but I'd take suggestions in other directions too).
Preferably, it should be as minimal as possible in terms of other functionality.
- OS: Windows 7
- An ability to edit the ruler (unit size/numbering) would be nice, but is not a necessity.
- Freeware is preferable but is not a necessity.