only search for specific symbology?

[philister]

Hi,

great gem!

Is there a possibility to search only for (lets say) QR-Codes?

Thanks and regards, Phil

[willglynn]

The underlying zbar library supports configuration values. This isn't currently plumbed into the zbar gem, but I could add that without too much effort. The API currently allows you to check the symbology of the resulting ZBar::Symbol objects:

symbols = image.process
qrcodes = symbols.select { |symbol| symbol.symbology == "qrcode" }

[philister]

Thank you for this explanation. Currently I "filter" the symbology afterwards (after process). But I bet, the search would be faster, if it had to search for a specific symbology. You know what I mean? Would be great to have this feature, because at least in my case, I know, what symbology I'm looking for.

[willglynn]

All right, I'll take a whack at this :-)

Would you happen to have an image containing barcodes with more than one symbology that you'd like to contribute to the test suite?

[willglynn]

As of the current master:

> ZBar::Image.from_jpeg(File.open("spec/support/test.jpg", "rb")).process(:symbology => "qrcode")
 => [] 
> ZBar::Image.from_jpeg(File.open("spec/support/test.jpg", "rb")).process(:symbology => "ean13")
 => [#<ZBar::Symbol:... @symbology="EAN-13", @data="9876543210128", ...>] 

I want to do a couple other things first, but this will be released as 0.2.0.

[willglynn]

zbar-0.2.0 has been released, containing this functionality, a rewritten test suite, Travis CI, as well as a runtime check for the zbar JPEG issue behind #2.

[philister]

Wow, awesome! Thank you a lot. It works well und improves the performance of my code-detection significantly.