Why is the unit of focal length in pixel when you multiply mm and pixel?

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I calibrated my stereo camera with matlab and extracted the focal length.
Now if I look to the documentation in which unit the focal lenght is, it shows me the calculation f = F*s.
F is in mm and s is in pixel so the unit of f should be in mm*pixel but ist says it is in pixel.

Answers (1)

Image Analyst
Image Analyst on 26 Mar 2023
Where is that documentation you're referring to? I don't know why you'd multiply those two things. What do they represent? But in general the units of a product are the product of the units, so if F is in mm and s is in pixels, then y-F*s will have units of (mm*pixels).

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