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21.7 Code Recognition
VISREADQR (Statement)
Function
Reads the QR code.
Format
VISREADQR <Window number>, <Coordinate X>, <Coordinate Y>,
<Mode> [, <Binary lower limit>[, <Binary upper limit>] ]
Explanation
<Window number> Designates the window number (0 to 511).
<Coordinate X> Designates the X coordinate (0 to 511).
<Coordinate Y> Designates the Y coordinate (0 to 479).
<Mode> Designate the method for binarization.
0: Automatic binarization (Binarizes the process range with the decision
analysis method.)
1: Designated value binarization (Binarizes based on the binarization
level in the instructions.)
<Binary lower limit> Designates the lower limit for binarization (0 to 254 lower
limit < upper limit).
If ignored, 0 is set.
<Binary upper limit> Designates the upper limit for binarization (1 to 255 lower
limit < upper limit).
If ignored, 255 is set.
Reference mark 1
Reference mark 2
Reference
mark 3
QR code home
position
Angle
Width
Height
Example of a QR code (Version 2)
Cell size (width of a cell)
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