Code Reading Considerations - Teledyne BOA Spot ID Series Quick Start Manual

Code Reading Considerations

BOA Spot ID offers fast decoding of 1D and 2D codes printed or directly marked on a
variety of surfaces, including paper, plastic and metal. The decoder is robust and able
to read poorly printed, worn or environmentally degraded codes in any orientation.
Guidelines for reliable code reading are as follows:
1D Codes
• Minimum distance between bars = 1.5 pixels (2.5 pixels for low contrast)
• Minimum bar width = 1.5 pixels (2.5 pixels for low contrast)
2D Codes
• Minimum cell size = 2 x 2 pixels
• Minimum dot diameter = 2 pixels
All Codes
• Non-DPM = Maximum ROI size = 1280 x 960
• DPM = Maximum ROI area = 614,400 pixels (i.e. 1280 x 480, 1024 x 600, 960 x 640,
800 x 768 and anything smaller, such as 640 x 480)
• Use "Invert" preprocessor to decode light-on-dark barcodes
• With the exception of "low contrast", the control parameters described on the next
page are mutually exclusive. Only one can be enabled at a time.
General deployment guidelines:
• Choose a lens that satisfies the FOV and minimum bar/module size
• Adjust working distance to maximize the code FOV wherever possible
• BOA Spot ID with integrated light is a good choice for high contrast codes printed on
non-reflective surfaces
• BOA Spot ID with external dark field light is better for dot peen codes
• BOA Spot ID with external diffuse off-axis light is better for curved or highly reflective
surfaces.
• Increase light and reduce shutter time to stop motion for fast moving applications
BOA Spot ID Quick Start
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Version 1.2; 2017-11-20