Scanning is too sensitive

[renerisha]

I'm getting barcodes from walking around with the scanner opened on android, it seems that asphalt and my carpet result in whatever pattern. The carpet has the following design (if it helps you):

Asphalt is resulting in a barcode like: 0142722651309245
The carpet returns: 0159932124100211

[jjbridges]

That's "the man" sending you subliminal messages. :)

[tjwoon]

This is interesting 😆
Will have to check if the upstream ZBar project has a known issue on this.
Thanks!

[nickgerman]

@tjwoon I am noticing this as well on newer devices, not so much older ones. I wonder if its to do with the X_DENSITY and Y_DENSITY. Just lowered the density to 1 and am now getting less barcodes in the wild, my guess would be the higher megapixel cameras are causing this to be sensitive.

[binoculars88]

@nickgerman thanks for this. Was getting some false scans too. This fix seems to work.

[dcousens]

@binoculars88 / @nickgerman can you elaborate on how you resolved this?
Is it something we could add as a parameter?

[nrcrabbe]

@dcousens

Lines 147, 148 of android/ZBarScannerActivity.java

scanner.setConfig(0, Config.X_DENSITY, 3);
scanner.setConfig(0, Config.Y_DENSITY, 3);

Change the values 3 to 1. Fixes the false scans and I haven't had any negative issues after the change. Would be great to have these either changed to 1 (if there are no unintended consequences), or at least have it parameterised.

Cheers

[dcousens]

Thanks @nrcrabbe