Bluebird VF550 - Data Capture; Introduction; Imaging; Digital Camera

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8 Data Capture
8 Data Capture
8.1 Introduction
The device supports data capture using:
• Integrated imager
• Integrated camera
8.2 Imaging
The imager uses imaging technology to take a picture of a bar code, stores the resulting image in its
memory, and executes state-of-the-art software decoding algorithms to extract the bar code data from the
image. With a 2D imager, the device has the following features:
• Omnidirectional reading of a variety of bar code symbologies, including the most popular linear, postal,
PDF417, and 2D matrix code types.
• Advanced intuitive laser aiming cross-hair and dot aiming for easy point-and-shoot operation.
8.3 Digital Camera
The device with an integrated camera based barcode scanning solution has the following features:
• Omnidirectional reading of a variety of barcode symbologies, including the most popular linear, postal, QR,
PDF417, and 2D matrix code types.
• Cross-hair reticle for easy point-and-shoot operation.
• Picklist mode to decode a particular barcode from many in the field of view.
The solution uses the advanced camera technology to take a digital picture of a barcode, and executes
state-of-the-art software decoding algorithms to extract the data from the image.
8.4 Scanning Considerations
Typically, scanning is a simple matter of aim, scan, and decode, with a few quick trial efforts to master it.
However, consider the following to optimize scanning performance:
• Range: Scanners decode best over a particular working range — minimum and maximum distances from
the barcode. This range varies according to barcode density and scanning device optics. Scan within range
for quick and constant decodes; scanning too close or too far away prevents decodes. Move the scanner
closer and further away to find the right working range for the barcodes being scanned.
• Angle: Scanning angle is important for quick decodes. When the illumination/flash reflects directly back into
the imager, the specular reflection can blind/saturate the imager. To avoid this, scan the barcode so that
the beam does not bounce directly back. Do not scan at too sharp an angle; the scanner needs to collect
scattered reflections from the scan to make a successful decode. Practice quickly shows what tolerances
to work within.
• Hold the device farther away for larger symbols.
• Move the device closer for symbols with bars that are close together.
Scanning procedures depend on the app and device configuration. An app may use different scanning
procedures from the one listed above.