OCROCV_E.PDF

Contents

Introduction

Inspection Element W OCR /

OCV

SIMATIC

Learning Character Patterns

Option OCR / OCV for VIDEOMAT IV

Description of Optional Character Recognition Functionality

(OCR / OCV Version 1.0 for VIDEOMAT IV System Program

V5.01)

11/99

C79000-G7076-C019

Edition 01

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This device and its components may only be used for the applications described in the catalog or the

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Siemens AG

Bereich Automatisierungs- und Antriebstechnik

Geschaeftsgebiet Industrie-Automatisierungssysteme

Postfach 4848, D- 90327 Nuernberg

©Siemens AG 1999

Technical data subject to change.

Siemens Aktiengesellschaft

C79000-G7076-C019

Contents

Introduction................................................................................................................ 1-1

1.1

Option OCR / OCV........................................................................................ 1-1

1.2

Function........................................................................................................ 1-1

Inspection Element W OCR / OCV............................................................................. 2-1

2.1

Inspection Element Structure......................................................................... 2-1

2.2

Parameters «P1»...«P6» ............................................................................... 2-2

2.3

Results «R1»...«R5» ..................................................................................... 2-4

Learning Character Patterns ..................................................................................... 3-1

3.1

“Learn OCR Pattern“ Command Window....................................................... 3-1

3.2

Learning Process .......................................................................................... 3-3

3.3

More About Learning..................................................................................... 3-4

3.4

Pattern Administration ................................................................................... 3-5

3.5

Recognition Parameters (OCR-specific) ........................................................ 3-6

3.6

General Parameters ...................................................................................... 3-7

3.7

Search and Segmentation Parameters .......................................................... 3-9

3.8

Pattern Recognition Parameters................................................................. . 3-11

3.9

Speed vs. Quality - Optimization................................................................. . 3-13

Option OCR / OCV for VIDEOMAT IV

C79000-G7076-C019-01

III

Contents

Option OCR / OCV for VIDEOMAT IV

C79000-G7076-C019-01

1 Introduction

1.1 Option OCR / OCV

This software option adds OCR and OCV character recognition functionality to the

VIDEOMAT IV System Program (Version V5.01). The inspection element required

for this purpose, W OCR / OCV, is not included in the standard VIDEOMAT IV

package.

To make this inspection element operational, please follow the instructions

contained in the product information enclosed with the OCR optional package. You

need a PC / programming device to configure the VIDEOMAT IV connected via

data line.

1.2 Function

The inspection element allows the

· Recognition (identification, OCR) or

· Verification (OCV)

of a string displayed in its input window «P1» by comparing the string's current

characters with previously learned character patterns.

· The string may consist of a sequence of alphanumeric characters

· The inspection element can also learn and recognize special characters,

characters from other alphabets (Russian, Greek...) and other patterns

approximating normal character patterns in size and which, like them, do not

bisect neighboring characters.

· Identical characters from different character sets (for example, A and A (bold))

are learned separately (in other words, separate patterns are learned for A and

A ). However, you can assign the same character name to different patterns (A,

for instance). If you need to make a distinction, you can assign any character

names you want that are not contained in the rest of the set of character

resources (for example, A for A and a for A , if a does not feature in the

character set).

The inspection element can learn and recognize up to 200 character patterns.

Recognition or verification starts at the left border of the input window and

proceeds character by character to the right border or for the configured string

length, depending on the options chosen.

Option OCR / OCV for VIDEOMAT IV

C79000-G7076-C019-01

1-1

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