Browse Prior Art Database

Bill Recognition Algorithm

IP.com Disclosure Number: IPCOM000114038D
Original Publication Date: 1994-Nov-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 4 page(s) / 73K

Publishing Venue

IBM

Related People

Stone, H: AUTHOR [+2]

Abstract

Disclosed is a method to detect direction and denomination of a bill when the bill is processed in a bill recognition device.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Bill Recognition Algorithm

      Disclosed is a method to detect direction and denomination of a
bill when the bill is processed in a bill recognition device.

      The disclosed algorithm uses an image scanned by an image line
sensor to detects their features.  This algorithm consists of step 1
and 2.

      Step 1 - The step 1 consists of step 1.1, 1.2 and 1.3.  In this
step, the top/bottom and left/right direction is checked assuming all
denominations of bill.  After this checking, confidence levels for
each denomination of bill are calculated and the results are sorted
for step 2.

      Step 1.1 - This step is prepared to detects a horizontal
direction of bill.  Some pairs of four symmetrical points are
compared to detect the horizontal direction assuming all
denominations.  If the direction for one pair is left, then a
horizontal score is incremented and if the direction for the pair is
right, the horizontal score is decremented.  The horizontal score is
used in step 1.3.  The direction is judged by this score.  If the
sign of accumulated horizontal score is plus, the horizontal
direction is left.  If the sign of it is minus, then the horizontal
direction is right.

      Step 1.2 - This step is prepared to detects a vertical
direction of bill.  Some pairs of two vertically symmetrical points
are compared to detect the vertical direction assuming all
denominations.  If the direction for one pair is top, then a vertical
score is incremented and if the direction for the pai...