US 3,938,089 AGranted

Double read system for character recognition systems

AssigneeBurroughs Corporation

InventorsArvin D. McGregor, William E. Holmes

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Abstract

An improved character reading system that utilizes two separate read devices: a first read device and a second read device in combination with a random access memory for storing each character read by the first read device, a memory control circuit for writing each character into the random access memory, and a comparison logic circuit for comparing each character as read by the second read device with the corresponding character stored in the random access memory. The system also includes a time-out counter for indicating when the last character has been read and a comparison logic timing circuit for controlling the comparison logic and triggering the random access memory read control circuit so as to provide the corresponding character to the comparison logic.

Claims17

Dependent claims

In a method of reading characters which includes the steps of reading each character with a first reading means and again reading each character with a second independent and different reading means, the improvement comprising the steps of:

storing two interpretations of a first character, the first interpretation as read by said first reading means and the second interpretation as read by said second reading means;
providing two interpretations of a second character, the first interpretation as read by said first reading means and the second interpretation as read by said second reading means;
selecting for output the first interpretation of said first character if both interpretations of said first character are the same;
selecting a non-reject interpretation of said first character for output when the other interpretation of said first character is a reject character;
outputting a reject character when both interpretations of said first character are reject characters;
selecting only characters from said first reading means when the second interpretation of said first character and of said second character are both reject characters;
selecting only characters from said second reading means when the first interpretation of said first character and of said second character are both reject characters;
and
outputting a reject character where the interpretations of said first character are not equal, but where neither is a reject character, and where both interpretations of said second character are equal and not reject characters.

6 more elements

In a character reading system having a first reading means and a second independent and different reading means for reading characters, the improvement comprising:

a first register means for temporarily storing the first character read by said first reading means;
a second register means for temporarily storing the corresponding first character read by said second reading means;
first input means for receiving the next successive character read by said first reading means;
second input means for receiving the corresponding next successive character read by said second reading means;
a first comparison logic means coupled to said first and second register means for comparing the first character read by said first reading means with the corresponding first character read by said second reading means;
a second comparison logic means coupled to said first and second input means for comparing the next successive character read by said first reading means and the corresponding next successive character read by said second reading means;
and
decision logic circuit means responsive to said first and second register means, to said first and second input means, and to said first and second comparison logic means for determining whether the first character read by said first reading means or the corresponding first character read by said second reading means is more likely to be a valid character.

5 more elements

A magnetic ink character reading system comprising:

first direct current reading means for reading characters printed in magnetic ink;
second alternating current reading means for reading characters printed in magnetic ink;
storage means for storing the characters read by said first direct current reading means;
and
logic means responsive to said storage means and to said second alternating current reading means for evaluating the relative validity of the character read by said first direct current reading means and the corresponding character read by said second alternating current reading means.

2 more elements

A magnetic ink character reading system comprising:

direct current reading means for reading characters printed in magnetic ink;
alternating current reading means for reading characters printed in magnetic ink;
character storage means for storing the characters read by said direct current reading means;
write control circuit means responsive to said direct current reading means for causing said character storage means to store the characters read by said direct current reading means;
a comparison logic circuit means responsive to said alternating current reading means for comparing a character read by said alternating current reading means and the corresponding character read by said direct current reading means;
a read control circuit means responsive to said alternating current reading means for providing to said comparison logic circuit means the corresponding character stored in said character storage means;
a comparison timing logic circuit means responsive to said alternating current reading means for timing the operation of said comparison logic circuit means;
counter means responsive to said alternating current read means for indicating to said comparison timing logic means when the last character has been read by said alternating current reading means;
and
an output register means responsive to said comparison timing logic means, for receiving the output of said comparison logic circuit means.

7 more elements

A magnetic ink character reading system comprising:

first reading means for reading magnetic ink characters previously subjected to one form of a common magnetic field encoding, and for producing a waveform characteristic of each such character so read;
second reading means for subsequently reading the same magnetic ink characters as read by the first reading means but previously subjected to a different form of a common magnetic field encoding, and for producing a waveform characteristic of each such character so read;
means for converting the waveforms of each of the same characters read by said first and said second reading means into multi-bit binary representations thereof;
means for comparing the multi-bit binary representations produced by said first and said second reading means corresponding to the same characters;
and
logic means responsive to said converting means and to said comparison means for accepting or rejecting the validity of the characters read by said first reading means and the characters read by said second reading means.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/445,773Filed 25 Feb 1974
Granted: 10 Feb 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G06V 10/98
Arrangements for image or video recognition or understanding: detection or correction of errors, e.g. by rescanning the pattern or by human…
G06V 10/10
Arrangements for image or video recognition or understanding: image acquisition
G06V 30/144
Image acquisition: using a slot moved over the image; using discrete sensing elements at predetermined points; using automatic curve following means
G06V 30/192
Recognition using electronic means: using simultaneous comparisons or correlations of the image signals with a plurality of references