A method for recognizing job separator pages that tolerates more changes in imaging conditions involving pixel resolution, noise, pose changes (rotation, translation and shear) and a system which can be trained on-site to learn any new separator page. The invention is suitable for use in any scanning assembly systems such as flatbed scanners, feed through document handlers, single page feed scanners, as well wraparound document handlers, and is insensitive to leading and trailing edge-base skew detection problems. A job sheet is visually recognized. Detection of alignment markers is invariant to skew of the most general form and includes all rotations and stretches that occur on a page due to page folding.