X SCALE X SKEW Y PARALLAX
TRANSFORMATION TRANSFORMATION TRANSFORMATION
CORRECTING CORRECTING CORRECTING
NORMAL DISTORTION DUE DISTORTION DUE MISALIGNMENT
(NO DISTORTION) TO X SLOPE TO Y SLOPE IN Y
LEFT
SCANNING
TÜBE
RIGHT
SCANNING
TUBE
Fig. 3 — Scanning pattern and method of correcting image distortion