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Vision Sensor Manual
Parameters Function
Version
Only QR-Code: Minimum symbol version to be read: [1. . . 40]
Model type
Only QR-Code: Type of the QR Code model specification: 1, 2, 0
Shape
Only ECC200 and QR-Code: Possible restrictions concerning the module shape
(rectangle and/or square).
Model
robustness
Robustness of the decoding of data codes with very small module sizes. Setting the
parameter to ’high’ increases the likelihood of being able to decode data codes with very
small module sizes. Additionally, in that case the minimum module size should also be
adapted accordingly, thus should be set to the expected minimum module size and width,
respectively.
Model grid
Only ECC200: Describes whether the size of the modules may vary (in a specific range)
or not. Dependent on the parameter different algorithms are used for the calculation of
the module’s centre positions. If it is set to ’fixed’, an equidistant grid is used. Allowing a
variable module size (’variable’), the grid is aligned only to the alternating side of the
finder pattern. With ’any’ both approaches are tested one after the other. Please note
that the value of ’module_grid’ is ignored if ’finder_pattern_tolerance’ is set to ’high’. In
this case an equidistant grid is assumed.
Strict model
Specifies, if the code parameters have to be meet completely or not. If this parameter is
set to "Yes", all codes outside the parameter range will be ignored.
Position
pattern
Only QR-Code: Number of position detection patterns that have to be visible for
reading a code (2 or 3).
Find pattern
tolerance
Only ECC200: Tolerance of the search with respect to a disturbed or missing finder
pattern. The finder pattern includes the L-shaped side as well as the opposite alternating
side. In one case (’low’), it is assumed that the finder pattern is present to a high degree
and shows almost no disturbances. In the other case (’high’), the finder pattern may be
heavily disturbed or missing completely without influencing the recognition and the
reading of the symbol. Note, however, that in this mode the run-time may significantly
increase.
4.6.3.12 Detector OCR
4.6.3.12.1 Detector OCR, Procedure
To set up an OCR Detector please follow these steps. As some steps base on the results of the one
which was processed before, for a correct processing the sequence of the steps must be as described.
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