Discussion and Support for the OptiTrack, SmartNav and TrackIR brands by NaturalPoint

imager coordinates <> sensor resolution

by suhl79 » Sat Sep 25, 2010 8:09 am


I use SDK 1.3.038 and V120:slim camera. SDK manual says that I can read object coordinates within 355x290 range, but the camera sensor resolution is stated to be 640x480. sCameraObject structure has X and Y coordinates declared as float type. Am I right that coordinates from camera sensor are scalled to these given by SDK with float precision? Is that the way it works?

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by Birch » Tue Sep 28, 2010 11:31 pm

Cameras with 640x480 sensor resolution the SDK will return coordinates in the 640x480 range. The coordinates will not be down-scaled to smaller sizes.

Where in the SDK docs does it say the coordinate range will be limited to 355x290?
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by suhl79 » Sat Oct 02, 2010 2:12 am

OptiTrackAPI_1.1.037.doc section 3.9. - I suppose the manual had been written before your company provided camera with bigger imagers to the market.
I've found out that API realy returns real imager coordinates, but I had made my assumption before that and just after reading manual.
Thanks for the answer.
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