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Author Topic: V1.1 lens distortion equation  (Read 1885 times)

patcarbon

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V1.1 lens distortion equation
« on: June 02, 2016, 06:21:00 PM »
Hi

I'm having a debate with a reviewer on an upcoming Phantom 3 photogrammetry paper.  Could someone please clarify the exact form of the distortion correction used in the old V1.1?  If we assume no tangential effects and neglect K4, which of these 2 forms would be correct

(1) K1*r^2 + K2*r^4 + K3*r^6
OR
(2) r*(K1*r^2 + K2*r^4 + K3*r^6)

Obviously the key diffference is that r factor at the start of (2) and whether or not Ks ultimately work in even or odd powers of r

Thanks
Patrice

Alexey Pasumansky

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Re: V1.1 lens distortion equation
« Reply #1 on: June 02, 2016, 06:46:42 PM »
Hello Patrice,

The equations for the radial distortions are same for versions 1.1 and 1.2 (please refer to the Appendix C of PhotoScan Manual: http://www.agisoft.com/pdf/photoscan-pro_1_2_en.pdf).
Best regards,
Alexey Pasumansky,
Agisoft LLC

patcarbon

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Re: V1.1 lens distortion equation
« Reply #2 on: June 02, 2016, 07:03:46 PM »
Thanks!
P