Hello.
I calibrated and stereo-parallelized the stereo camera.I would like to know how to find the coefficient to convert from pixels to mm.
From the Q matrix obtained by stereo rectification, Tx: baseline and f: focal length were determined. As you know, the depth z is found by the following formula
z = Bf/(x-x') z:[pixels]
However, the units of z obtained from this formula are pixels. A factor k[mm/pixel] is needed to convert it to mm. Then the equation is as follows
z = (Bf/(x-x'))*k z:[mm]
Is there a smart way to find this coefficient k? Please use something other than how to actually measure z several times to derive k, or how to examine the pitch pixels of the camera's image sensor.
In the case of HALCON, I was able to find it by a function instead of using the method described above.
Couldn't it be calculated from the camera and Q matrices obtained from calibration and stereo parallelization? Thank you.
