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. 2015 Jul 24;10(7):e0133905. doi: 10.1371/journal.pone.0133905

Table 1. Internal camera parameters.

Focal length(mm) 8.283 Distortion factor k1 1.442e-003
Image center Cx(pixel) 419.47 Distortion factor k2 -4.567e-005
Image center Cy(pixel) 246.43 Distortion factor s1 1.365e-004
Nonperpendicularity factor 1.039 Distortion factor s2 -1.902e-004