How can I measure the Euclidean distance (tortuosity) of vessels?

imagej

#1

Dear all,
This must be too simple for you but:
How can I measure the Euclidean distance (shortest distance between two points)?
I would like to compare the Euclidean distance with the real distance of the retinal artery as a tortuosity marker.
Example:

Thank you very much in advance! Rianne


#2

Good day Rianne,

here is a link with processing steps and a macro that you may adapt to your needs:
http://forum.image.sc/t/how-to-batch-measure-distances-between-points/3970/5

As you see, the macro computes five distances, so it shouldn’t be too difficult to make it work with one distance…

Have success

Herbie