In a method for compensating for pattern distortion of sheet-type work
material spread onto a support surface a processing apparatus is provided
and carries said support surface. The work material is spread onto the
support surface and images of selected areal portions of the work material
are captured. A controller analyzes these images and projects them onto a
display whereupon the images are mapped to define any distortion in the
work material. The controller then undistorts the images of these areal
portions and projects them back onto the display so that an operator can
position undistorted digital representations of pattern pieces onto the
undistorted images of the work material. The controller then distorts the
geometry of the pattern pieces positioned on the work material by the
operator to conform to the distortion in the spread material.
