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Posted to batik-users@xmlgraphics.apache.org by Robert Jenks <rj...@animefest.org> on 2012/09/21 17:00:58 UTC
Barcodes in SVG
I am currently using Batik as part of a workflow to print badges for a
convention. I have a java desktop application which:
1. polls a web server for badges to print
2. retrieves the data (type, template name, person's name, id, etc...)
3. loads an appropriate SVG template
4. Uses ZXing to generate a code-128 barcode and an QR code
5. Loads the appropriate picture for the badge
6. converts the barcode and picture PNGs into data: urls
7. find the appropriate elements in the svg dom and replaces the dummy
images with the picture and barcode data: urls
8. sets the batik transcoder output resolution
9. rasterizes the svg to a png file
10. sends the png to a photo printer
The problem I am having is that resulting badge png has artifacts in the
barcodes. They're either antialiasing or scaling artifacts. This makes
the barcode a little hard to scan with readers and slowed down our
registration system. Does anyone have any suggestions on how I can keep
the barcode images as crisp black and white images inside the full color
badge?
Thanks,
Robert
Re: Barcodes in SVG
Posted by Robert Jenks <rj...@animefest.org>.
Thank you! I will give that a try.
On Sep 22, 2012 6:28 AM, "DeWeese Thomas" <th...@gmail.com> wrote:
> Hi Robert,
> You should try adding style="image-rendering:optimizeSpeed" to the image
> elements (you can put it in the templates probably). That should disable
> the anti-aliasing when resizing the barcodes.
>
> Thomas
>
> On Sep 21, 2012, at 11:00 AM, Robert Jenks <rj...@animefest.org> wrote:
>
> I am currently using Batik as part of a workflow to print badges for a
> convention. I have a java desktop application which:
>
> 1. polls a web server for badges to print
> 2. retrieves the data (type, template name, person's name, id, etc...)
> 3. loads an appropriate SVG template
> 4. Uses ZXing to generate a code-128 barcode and an QR code
> 5. Loads the appropriate picture for the badge
> 6. converts the barcode and picture PNGs into data: urls
> 7. find the appropriate elements in the svg dom and replaces the dummy
> images with the picture and barcode data: urls
> 8. sets the batik transcoder output resolution
> 9. rasterizes the svg to a png file
> 10. sends the png to a photo printer
>
> The problem I am having is that resulting badge png has artifacts in the
> barcodes. They're either antialiasing or scaling artifacts. This makes
> the barcode a little hard to scan with readers and slowed down our
> registration system. Does anyone have any suggestions on how I can keep
> the barcode images as crisp black and white images inside the full color
> badge?
>
> Thanks,
> Robert
>
>
>
Re: Barcodes in SVG
Posted by DeWeese Thomas <th...@gmail.com>.
Hi Robert,
You should try adding style="image-rendering:optimizeSpeed" to the image elements (you can put it in the templates probably). That should disable the anti-aliasing when resizing the barcodes.
Thomas
On Sep 21, 2012, at 11:00 AM, Robert Jenks <rj...@animefest.org> wrote:
> I am currently using Batik as part of a workflow to print badges for a convention. I have a java desktop application which:
> polls a web server for badges to print
> retrieves the data (type, template name, person's name, id, etc...)
> loads an appropriate SVG template
> Uses ZXing to generate a code-128 barcode and an QR code
> Loads the appropriate picture for the badge
> converts the barcode and picture PNGs into data: urls
> find the appropriate elements in the svg dom and replaces the dummy images with the picture and barcode data: urls
> sets the batik transcoder output resolution
> rasterizes the svg to a png file
> sends the png to a photo printer
> The problem I am having is that resulting badge png has artifacts in the barcodes. They're either antialiasing or scaling artifacts. This makes the barcode a little hard to scan with readers and slowed down our registration system. Does anyone have any suggestions on how I can keep the barcode images as crisp black and white images inside the full color badge?
>
> Thanks,
> Robert