No amount of rounding will save you. PDF doesn't have pixels, those pixels only
appear in the printer and are out of your control. The only way to be safe is
to have a good printing resolution or to make the barcode bigger. Barcodes are
rather resilient and even this 2-4 pixels fuzzyness won't prevent them to be
read.
Paulo
________________________________
From: Diego Ruotolo [mailto:[email protected]]
Sent: Monday, April 18, 2011 6:25 PM
To: [email protected]
Subject: Re: [iText-questions] HELP NEEDED: barcode and anti-aliasing
OK: do you think is better to make this rounding directly in the code (using a
function such as Math.round() ) ? I think the result will be more predictable
this way, won't it?
Il 18/04/2011 19.05, Paulo Soares ha scritto:
Yes but note that as you can't have half printer pixels you'll end up with 2, 3
or 4 pixels depending on where the bar is placed.
Paulo
________________________________
From: Diego Ruotolo [mailto:[email protected]]
Sent: Monday, April 18, 2011 5:55 PM
To:
[email protected]<mailto:[email protected]>
Subject: Re: [iText-questions] HELP NEEDED: barcode and anti-aliasing
Hi Paulo,
thanks for your answer. Can you also suggest me some tricks to improve barcode
quality? E.g., a correct value for the X property? Actually, if I want a narrow
bar of 3 pixels and I have a resolution of 200 dpi, I set the X property to
3*72/200 , is that right?
Thanks,
Diego
Il 18/04/2011 18.02, Paulo Soares ha scritto:
That's your printer driver being too helpful. From Acrobat print to image and
it will look ok.
Paulo
-----Original Message-----
From: Diego Ruotolo [mailto:[email protected]]
Sent: Monday, April 18, 2011 4:28 PM
To:
[email protected]<mailto:[email protected]>
Subject: [iText-questions] HELP NEEDED: barcode and anti-aliasing
Hi,
this is my first post to this list. My name is Diego and I am using
iText to generate labels with barcode. I've tried several way of barcode
generation, e.g. as a tempalte with barcode, as an iText image and as an
awt image, but the result is always the same: a kinda anti-aliasing
effect appears on the edge of bars, like a gray 1-pixel line. Since the
data are correct (e.g.: the awt image is only black and white), I would
like to know if there is any way to remove this rendering problem,
because it may cause the barcode not to be read by some instruments.
Actually I am using Interleaved 2 of 5 barcode, but I need to remove
this "anti-aliasing" effect on all barcode type.
All susggestions are welcome.
Thanks in advice,
Diego
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Benefiting from Server Virtualization: Beyond Initial Workload
Consolidation -- Increasing the use of server virtualization is a top
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_______________________________________________
iText-questions mailing list
[email protected]<mailto:[email protected]>
https://lists.sourceforge.net/lists/listinfo/itext-questions
iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
--
Ing. Diego Ruotolo
Software developer
NoemaLife S.p.A.
Via Gobetti, 52
40129 Bologna - ITALY
T +39 051 70.98.249
F +39 051 41.93.900
www.noemalife.com<http://www.noemalife.com>
________________________________
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Esta mensagem é destinada exclusivamente ao destinatário. Pode conter
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recebida por engano, por favor envie-a de volta para o remetente e apague-a do
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Disclaimer:
This message is destined exclusively to the intended receiver. It may contain
confidential or legally protected information. The incorrect transmission of
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received by mistake, please send it back to the sender and delete it from your
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receiver to use, distribute or copy any part of this message.
------------------------------------------------------------------------------
Benefiting from Server Virtualization: Beyond Initial Workload
Consolidation -- Increasing the use of server virtualization is a top
priority.Virtualization can reduce costs, simplify management, and improve
application availability and disaster protection. Learn more about boosting
the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev
_______________________________________________
iText-questions mailing list
[email protected]<mailto:[email protected]>
https://lists.sourceforge.net/lists/listinfo/itext-questions
iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
--
Ing. Diego Ruotolo
Software developer
NoemaLife S.p.A.
Via Gobetti, 52
40129 Bologna - ITALY
T +39 051 70.98.249
F +39 051 41.93.900
www.noemalife.com<http://www.noemalife.com>
Aviso Legal:
Esta mensagem é destinada exclusivamente ao destinatário. Pode conter
informação confidencial ou legalmente protegida. A incorrecta transmissão desta
mensagem não significa a perca de confidencialidade. Se esta mensagem for
recebida por engano, por favor envie-a de volta para o remetente e apague-a do
seu sistema de imediato. É proibido a qualquer pessoa que não o destinatário de
usar, revelar ou distribuir qualquer parte desta mensagem.
Disclaimer:
This message is destined exclusively to the intended receiver. It may contain
confidential or legally protected information. The incorrect transmission of
this message does not mean the loss of its confidentiality. If this message is
received by mistake, please send it back to the sender and delete it from your
system immediately. It is forbidden to any person who is not the intended
receiver to use, distribute or copy any part of this message.
------------------------------------------------------------------------------
Benefiting from Server Virtualization: Beyond Initial Workload
Consolidation -- Increasing the use of server virtualization is a top
priority.Virtualization can reduce costs, simplify management, and improve
application availability and disaster protection. Learn more about boosting
the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev
_______________________________________________
iText-questions mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/itext-questions
iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
