Frequently Asked Question
What are interesting camera parameters for stitching/mapping applications.
Last Updated 7 years ago
As an example find the values for a Tau 2 640 with 13mm lens in the following.
By exchanging resolution and focal length data, this can be extrapolated to other Tau 2 models.
Focal length in mm: 13mm
Chip size X in pixels: 640
Chip size Y in pixels: 512
Pixel pitch for Tau 2 640 and 336: 17µm
Pixel pitch for Tau 2 324: 25µm
Chip size X in mm: resolution_X * pitch = 640 * 17µm = 10.88mm
Chip size Y in mm: resolution_Y * pitch = 512 * 17µm = 8.704mm
Focal length in pixels: (resolution_X) * (focal length in mm) / (Chip size X in mm) = 640px * 13mm / 10.88mm = 764.7px
Principal Point X in mm: Chip size X in mm / 2 = 10.88mm / 2 = 5.44mm
Principal Point Y in mm: Chip size Y in mm / 2 = 8.704mm / 2 = 4.352mm
The last three values may slightly vary between camera cores, but should be good starting points for estimation.
By exchanging resolution and focal length data, this can be extrapolated to other Tau 2 models.
Focal length in mm: 13mm
Chip size X in pixels: 640
Chip size Y in pixels: 512
Pixel pitch for Tau 2 640 and 336: 17µm
Pixel pitch for Tau 2 324: 25µm
Chip size X in mm: resolution_X * pitch = 640 * 17µm = 10.88mm
Chip size Y in mm: resolution_Y * pitch = 512 * 17µm = 8.704mm
Focal length in pixels: (resolution_X) * (focal length in mm) / (Chip size X in mm) = 640px * 13mm / 10.88mm = 764.7px
Principal Point X in mm: Chip size X in mm / 2 = 10.88mm / 2 = 5.44mm
Principal Point Y in mm: Chip size Y in mm / 2 = 8.704mm / 2 = 4.352mm
The last three values may slightly vary between camera cores, but should be good starting points for estimation.