Bronger, thank you for your response.
But from the code of "mod-coord.cpp" (this file locates in
~/lensfun-0.2.7/libs/lensfun/mod-coord.cpp), we can see the following
code (for example for poly3 model, but the other models follow the
similar rule):
void lfExtModifier::ModifyCoord_Dist_Poly3 (voi
Maybe the information in this old thread will help:
http://developer.berlios.de/forum/message.php?msg_id=52571
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Dear all,
I have one question which I do not how to solve.
I want to simulate some realistic distortion in a synthetic way.
To be more clear, I have one example here. In the "slr-canon.xml"
file of database of LensFun, we can find the following:
Canon
Canon EF-S 18-55mm f/
thank you. I verified that the role of rd and ru interchanged in
lensfun.
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All your assumptions are correct. Note that Ru is measured in the
original image (taken by the camera), whereas Rd is measured in the
destination picture (which is supposed to be undistorted).
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The LensFun code nomenclature is misleading. While one wants to
transform a distorted picture into an undistorted one, one transforms
an undistorted radius into a distorted one with the direct polynomial
formular.
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