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2016-04-12 21:52:21 -0500 received badge  Student (source)
2015-06-11 02:57:54 -0500 asked a question how to use CV_CALIB_USE_INTRINSIC_GUESS in calibrateCamera


I am confused about how and when I can use the CV_CALIB_USE_INTRINSIC_GUESS in the calibrateCamera function.

The documentation says: "Currently, initialization of intrinsic parameters (when CV_CALIB_USE_INTRINSIC_GUESS is not set) is only implemented for planar calibration patterns (where Z-coordinates of the object points must be all zeros)."

  1. Does this mean: if the calibration patterns are planar, I can set an initial guess myself of the contrary?
  2. I have a 3d calibration pattern, but don't have a cameraMatrix, what is the correct configuration when using the function?


2015-06-10 06:56:49 -0500 commented question Units of image points for solvePnP

For my understanding: The imagePoints are given in pixels. I have the objectPoints in 3d coordinate system of a tracking system in mm. Now: the pose of the object in which coordinate system??

2015-06-10 03:52:12 -0500 commented question Units of image points for solvePnP

Currently, I define correspondences manually. Do you have an idea for automating this?

2015-06-02 09:23:59 -0500 asked a question Units of image points for solvePnP

Hi, I am new to this subject, so please forgive the silly question. To use solvePnP, are the positions of image points needed in pixel coordinates or mm? I.e. my 2D images are x ray images. Do I need to consider image spacing?