Operating instructions

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Code reading systems

Optical character recognition (OCR)

Text Genius for MV440

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Siemens ID 10 · 2014

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Application

Applications for text recognition span across almost all sectors.

The application areas can be generally divided in three task ar-

eas:

• Text recognition for recording the content of a plain text iden-

tification.

• Comparison of the content of a plain text identification with the

content of the adjacent machine-readable identification, e.g.

Data Matrix Code (DMC).

• Comparison of the content of a plain text identification with in-

dividually specified values which are transferred to the reader

similar to a printer.

Applications for different sectors are listed below. The list is in-

complete and only serves to illustrate the wide range of possible

applications.

Automobile industry, aerospace industry

• Detection and checking of plain text identifiers for type identi-

fication of components

• Comparison of DMC and plain text

• Acquisition of a unique identification of a product (serializa-

tion)

• Acquisition and checking the expiry date

Medical equipment

• Laser markings on implants (DPM)

• Laser markings on medical devices (DPM).

Electronics

• Acquisition of a unique plain text identification for identifying

devices, e.g. electricity meters

• Detection and checking of plain text identifiers for type identi-

fication of PCBs

• Solar industry (serial numbers on thin-layer modules)

• Acquisition of a unique plain text identifier on thin-layer mod-

ules - serialization

Food and beverage industry

• Inspection of expiry date on packaging

• Control of packaging and storage processes

"Text-Genius" and "Text-Genius Plus" can be used anywhere

where environmental conditions permit the use of SIMATIC

MV440 code readers. For details, see "SIMATIC MV440". Stan-

dard ring lights and lenses are designed to achieve IP67 degree

of protection by means of the protective barrel, and for glass-

free use in the food and beverages industry. If light sources or

lenses are used outside the protective barrel, they must be used

in compliance with their specification.

The "text recognition" function can be implemented in applica-

tions without the need to consider the type of font used for mark-

ing (Polyfont) or the marking method. The fonts which enable a

maximum read rate to be achieved are listed in the "Function"

chapter. Further fonts and additional characters can be added

to Text-Genius Plus at any time by training. No marking methods

are excluded either. The read rate improves if the font has a sta-

ble appearance and when there is a good contrast between the

background and marking.

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Design

Licenses

All SIMATIC MV440 stationary code readers are basic units un-

der the terms of "Text-Genius" and "Text-Genius Plus" licenses.

The text recognition functionality is enabled by transferring the

license key from the USB flash drive on which it is supplied to the

MV440 code reader by means of SIMATIC License Manager.

Demo mode

The code readers of the MV440 family allow all licensed function

packages to be used in demo mode. The function can be used

completely. Only output of the results on the communication

channels is suppressed. During demo mode, users can then de-

cide which license is required.

Configuration

Various light sources and lenses are available from the accesso-

ries portfolio of the SIMATIC MV440 in order to flexibly adapt im-

age recording to a wide range of conditions. The MV440 readers

allow configuration in accordance with the desired fieldbus inte-

gration, and starting of text recognition by triggering the reader.

The measurement result is output immediately after measure-

ment on the predefined process interface. Special sources of

light can be used at any time. Interfacing is described in the

chapter on SIMATIC MV440.

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Function

The outstanding feature of "Text-Genius" and "Text-Genius Plus"

is that they are easy to set up. To achieve stable read results for

text recognition, it is only necessary to set a few, simple param-

eters. "Text-Genius" uses a generic approach for text recogni-

tion, so no individual training is required for most fonts and the

characters (letters and digits) of the ASCII character set. Recog-

nition of several fonts is thus possible with this software without

specific training. In particular, no complex settings are required

for optimizing recognition performance.

The following fonts are ideal for recognition of the text:

•OCR-A

• Semifont M13

• and similar fonts

Furthermore, Arial, OCR-B and similar fonts also produce good

reading results.

"Text-Genius Plus" additionally allows the training of additional

characters for any character set. Expansion of the character set

is required to allow recognition of characters which are not in-

cluded or of those which are deformed as a result of the printing

process. The character sets of the "Text-Genius" license are

available as the basis for text recognition with "Text-Genius Plus"

so that text recognition can be started immediately without fur-

ther training. "Text-Genius Plus" is particularly suitable for appli-

cations with a varying print image and unknown fonts.

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