Re: krysalis-barcode: conversion from SVG to PNG

Ciao Alberto

I've just compared the SVG output with the PNG output and don't see any
differences. By the way, it can't be a conversion problem from SVG to
PNG because the PNG bitmap are produced directly, not via SVG. It's
different code that produces PNG. Of course, there could be a problem in
the Java2D-CanvasProvider but it doesn't look to me like that is the
problem.

Would you please verify that it also doesn't work if you enable
grayscale in the servlet (add: "&gray=true")? I have the slight
suspicion that the PNG is inverted (black is white and white is black).
I've seen that behaviour in some bitmap editors. I guess you probably
switched off the human-readable parts and the quiet zone.

Would you describe in a little more detail in what way the black bars
differ?

On 23.10.2003 19:20:20 Alberto Lirussi wrote:
> I'm making some experiment with the Krysalis Barcode Servlet and the associated web application copiled from krysalis-barcode-20031001.tar.Z. I'm using code 128.
> With SVG I have no problem recognizing the barcode with my Barcode scanner, even if the barcode images are very tiny.
> I run into trouble when using PNG.
> I tried with different bitmap resolution, Height and Module with, but the recognition of PNG images were not improved.
> It seems to me that is a conversion problem from SVG to PNG. In fact the black bars differs between the two images.
> 
> What can i do? Any advices?


Jeremias Maerki



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