Is the disparity smaller than real pixel movement

[HydrogenSulfate]

I test the disparity with a warping operation, but it is not correct when directly using the GT disparity, but is correct when using 32xdisp. Is there a scale factor between RGB image and disparity?

[catdance124]

Hi @HydrogenSulfate ,

Thank you for testing our disparity.
I had overlooked whether there was a scale factor, so I looked that up.

Our data is based on MPI Sintel, which says the following:

the focal length as given by Blender, the hard-coded pixel dimensions of 32 px / mm

Unfortunately, we had left the units of focal length in [mm].
So, we need to convert the units of the focal length to [px].

disparity = (baseline[m] * focal_length[mm]) / depth[m]
  ↓
disparity = (baseline[m] * focal_length*32[px]) / depth[m]

That is to say, it is correct to use disparity x32 as you say.

Sincerely,
Takahiro Kinoshita