Samsung Galaxy S2 720x480
Focal Length:          fc = [ 586.22862   588.51563 ] +- [ 12.74464   12.31768 ]
Principal point:       cc = [ 364.27225   246.26713 ] +- [ 8.45129   11.58474 ]
Skew:             alpha_c = [ 0.00000 ] +- [ 0.00000  ]   => angle of pixel axes = 90.00000 +- 0.00000 degrees
Distortion:            kc = [ 0.06194   -0.35787   -0.00392   0.00027  0.00000 ] +- [ 0.03167   0.12470   0.00671   0.00446  0.00000 ]
Pixel error:          err = [ 0.22645   0.14489 ]
