I have a Fujinon FE185C057HA fisheye lens and I want to know its projection.

Is there a software tool I can use to do this? I have the lens with me so I can take some pictures with it. I just need a quick way to tell if the projection is equdistant/stereographic/equisolid/brown/baker.

I also need to know the distortion parameters if the projection is Brown or Baker.

  • \$\begingroup\$ did you find a solution? \$\endgroup\$
    – jumpjack
    Commented Aug 12, 2021 at 14:37

1 Answer 1


I realize the question is quite old, but it still seems to get some views.

The quickest thing that I would try first is to take a photo of a planar grid / checkerboard pattern / brick wall straight on (center of image should be perpendicular to grid surface). Then I would use Hugin to see if I can undistort (de-fish) the image to obtain the original grid pattern with reasonably straight lines.

Looking at the lens type, you may use it for an engineering application. One good option to calibrate such a lens is using OpenCV. I found a tutorial how to calibrate fisheye lenses with OpenCV.


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