502-503 / 1363
Fieldmap (Hz)
Distortion correction
BW=1000Hz/px
BW=
~10
Hz/px
distorted image
Processing steps
1. Acquire fieldmap
2. Convert to displacement map
3. Calculate inverse transform
4. Warp original image
Displace ent map (px)
undistorted image
Images courtesy of Jesper Andersson, Oxford