Determining document fitness using illumination
First Claim
Patent Images
1. A currency processing system for assessing the fitness of bank notes, the system comprising:
- a batch feed;
a conveyer proximate the batch feed for moving notes from the batch feed;
a plurality of sort bins proximate the conveyer for receiving notes;
a control system;
a plurality of illumination sources coupled to the control system and proximate the conveyer, wherein the plurality of illumination sources includes at least two different wavelengths of electromagnetic radiation;
a line scan camera proximate the conveyer and coupled to the control system for capturing images in greyscale; and
the control system including a memory and a processor, wherein the memory and processor are operable to perform the following steps;
activate the plurality of illumination sources in a predetermined order,use the line scan camera to capture image data associated with the predetermined order and saving the image data in memory, wherein the image data are captured at a same location on a note for each of the plurality of illumination sources,apply a transformation function to the image data to produce a multi-dimensional vector, andcompare the multi-dimensional vector to a reference vector to yield a scalar fitness value.
1 Assignment
0 Petitions
Accused Products
Abstract
According to an illustrative embodiment, a method for detecting a document includes capturing a first plurality of images of a document at a first wavelength of electromagnetic radiation, capturing a second plurality of images of the document at a second wavelength of electromagnetic radiation, and assembling the first and second pluralities of images to form one or more images of the document.
106 Citations
9 Claims
-
1. A currency processing system for assessing the fitness of bank notes, the system comprising:
-
a batch feed; a conveyer proximate the batch feed for moving notes from the batch feed; a plurality of sort bins proximate the conveyer for receiving notes; a control system; a plurality of illumination sources coupled to the control system and proximate the conveyer, wherein the plurality of illumination sources includes at least two different wavelengths of electromagnetic radiation; a line scan camera proximate the conveyer and coupled to the control system for capturing images in greyscale; and the control system including a memory and a processor, wherein the memory and processor are operable to perform the following steps; activate the plurality of illumination sources in a predetermined order, use the line scan camera to capture image data associated with the predetermined order and saving the image data in memory, wherein the image data are captured at a same location on a note for each of the plurality of illumination sources, apply a transformation function to the image data to produce a multi-dimensional vector, and compare the multi-dimensional vector to a reference vector to yield a scalar fitness value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification