FWIW, the image looks CG to me. I am not asserting it is, just offering that as a possibility if it might matter.

Edge detection of straight lines (edges of bolt heads) could give you the horizon line at least (assumptions being they and the plane they rest on are regular/level).

In reply to Re: [OT] Mathematical photographers that program (Perl)? (Updated.) by Your Mother
in thread [OT] Mathematical photographers that program (Perl)? (Updated.) by BrowserUk

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