Abstract: A digital image comparator includes an Faster R-CNN configured to generate a filtered set of local feature maps of an input image, a match head, and logic to preserve the local feature maps in an indexed data structure and to make the local feature maps retrievable by the match head via local feature map indexes.

Abstract: A scanning control for a photocopier includes a pair of identically weighted networks configured to perform feature extraction on images and a memory storing registered security patterns. A match head of the scanning control receives an image pair, wherein a first image of the image pair is generated by a scanning element of the photocopier, and a second image of the image pair is obtained from the registered security patterns, and outputs a match score for the image pair. The output of the match head coupled controls operation of the scanning element.

Abstract: A digital image processor includes a region proposal network configured to transform digital image inputs into region proposals and bounding box refinement logic configured to transform the region proposals by determining a first set of the region proposals exhibiting dense spacing, determining a second set of the region proposals exhibiting sparse spacing, executing a first transformation to merge at least some of the region proposals exhibiting dense spacing to generate refined region proposals, executing a second transformation to join at least some of the region proposals exhibiting sparse spacing to generate additional ones of the refined region proposals, and applying an expansion transformation to the refined region proposals.