CREST LINES AND CORRELATION FILTER BASED LOCATION OF THE MACULA IN DIGITAL RETINAL IMAGES

A machine for the manufacture of a panel file for the storage of flat, flexible data elements is herein disclosed. A sheet of flexible resilient material is unrolled from an arbor. The material is cut into strips and rolled onto reels. The strips are substantially narrower than the depth of the pockets to be formed in the panel file. The reels are mounted on a strip aligning mechanism so that as the strips are unloaded from the reels they are in a parallel overlapping relationship. The strips are then pulled through an accumulator and placed in a heat sealing die. In the heat sealing die, the strips are joined to each other proximate the ends thereof to form a layered panel of overlapping pocket entrances. Also in the heat sealing die, a pocket forming sheet is attached to the back of the layered panel of strips. This apparatus is used to manufacture a panel for the storage of flat, flexible data elements that has a minimum number of overlapping layers at any point, has a minimum of bulk, and allows for easy insertion of data elements.