@article {14204,
	title = {Bias in visual motion processes: A theory predicting illusions},
	journal = {Statistical Methods in Video Processing.(in conjunction with European Conference on Computer Vision)},
	year = {2002},
	month = {2002///},
	abstract = {The first step in the interpretation of video sequences is theestimation of spatio-temporal image representations, that is
the image motion or the correspondence of points or lines.
Noise in the data, however, causes a serious problem for
their estimation; in particular, it causes bias. As a result the
location of image points, the orientation of image lines and
the length and orientation of image motion vectors are esti-
mated erroneously. It is suggested that machine vision sys-
tems processing video should include statistical procedures
to alleviate the bias. However, complete correction in gen-
eral does not appear to be feasible, and this provides an ex-
planation for most well-known geometrical optical illusions,
such as the caf{\'e} wall, the Z{\"o}llner, the Poggendorff illusion
and other recently discovered illusions of movement.
},
	author = {Ferm{\"u}ller, Cornelia and Aloimonos, J. and Malm,H.}
}
