[Insight-users] image substraction

[David Macias Verde]

Hi all:

Is there anyway to substract a piece of an image? I mean I want to
substract the canny edges of two binary threshold filtered images from
the canny edged models of the original images, once the two first have
been aligned with certain registration algorithm. This alignment will be
used to register the structures inside the borders of the canny edged
images (patient structures), not taken into account its outer contour,
which are, in my case, the multileaf collimator of a linear accelerator
used in Radiotherapy treatments.

Thanks in advance,

David Macias-Verde