Google Glass's Camera Parameter

gistfile1.txt

Horizontal FoV: 54.8
Vertical FoV: 42.5

>>> math.tan(math.radians(27.4))
0.5183507658105608

>>> math.tan(math.radians(21.25))
0.3888787318529897

focal_x
>>> 640 * 0.5 * (1.0/math.tan(math.radians(27.4)) )
617.3425817160823

focal_y
>>> 360 * 0.5 * (1.0/math.tan(math.radians(21.25)) )
462.8692321184758

another result:
I/OCVSample::CalibrationResult(14102): Loaded camera matrix: [357.658935546875, 0, 319.5;
I/OCVSample::CalibrationResult(14102):   0, 357.658935546875, 179.5;
I/OCVSample::CalibrationResult(14102):   0, 0, 1]
I/OCVSample::CalibrationResult(14102): Loaded distortion coefficients: [0.03136849403381348; -0.5553826689720154; 0; 0; 1