convert pixel length to cm

i have obtained the minimum length of image in pixel. But i want the value in 'cm'. How can i obtain this?

[Matt J]

How big are your pixels?

[mukesh bisht]

how to know the pixels of the image

[Image Analyst]

You didn't run my demo below did you? Why don't you at least try it and I'll check back later today if you still have questions.

[Matt J]

how to know the pixels of the image

You need to determine it based on the size of something(s) in the image that you know.

Answer 1

[Image Analyst]

See my attached spatial calibration demo.

[Mert Küçük]

Great demo, thank you so much!