The fast-barcode-scanner plugin

Cordova plugin for fast, continuous, highly configurable scanning of barcodes

• Fast: scans and parses a realtime video feed at a rate of 30fps@2048x1536.

• Continuous: Just start it, and it will send you an event for each barcode it acquires, until you stop it.

• Configurable:

  • Filtering: Don't waste time on barcodes you're not interested in by filtering based on barcode type and contents (see xxx).

  • Conflation: When running in raw mode, fbs will send you an event 30 times per second - whether anything significant changed or not.
    With conflation, you can configure what you consider important (see xxx).

  • Debouncing: Errors happen in the real world, and any real-life sequence of scan events will contain random errors or false-blank readings.
    To avoid this, you can set up debouncing - i.e. require that an error or false-blank condtion persists for a number of readings before being accepted (see xxx).

  • Optimistic tracking: When scanning at a high rate, a good place to look for a barcode is in the area you last found one - after all, how much will things usually change in 35ms?
    If this is a valid reasoning for your application, you will benefit from setting up optimistic tracking (see xxx)

Getting it

cordova plugin add cordova-plugin-fast-barcode-scanner

Initializing

fbs = window.navigator.fastbarcodescanner;
fbs.init({...})

Starting

fbs.start(success, error);

Processing events

function success(bcinfo, image)
{
   if (!bcinfo)
      console.log("fast-barcode-scanner: BLANK");
   else
      console.log(
         "fast-barcode-scanner: HIT:   " + 
         bcinfo.contents + 
         " at (" + 
         bcinfo.points[0].x + 
         ", " + 
         bcinfo.points[0].y + 
         ")"
      );
}

function error(reason)
{
   console.error("fast-barcode-scanner: ERROR: " + reason);
}

Closing

fbs.stop();
fbs.close();