DataCodeDetectorParams

Description

Parameters for detecting barcodes and datacodes.

Structure Fields

Type fields and default values (if defined) are described below:

Name	Type	Default	Description
Polarity	CodePolarity*	Any	Specifies whether the code is darker or brighter than the background.
MinContrast	Integer*	10	Minimal gray level difference between dark and bright modules.
DetectionMethod	DatacodeDetectionMethod	FinderEdges	Selects one of available detection algorithms; FinderEdges is the best overall, but DotGrid may be better for dot-printed codes and for damaged finder patterns.
PyramidStrategy	DatacodePyramidStrategy	Precise	Specifies the step of image downsampling used for finding codes at different scales.
DecodeStrategy	DatacodeDecodeStrategy	Precise	Specifies the precision of the decoding algorithm (after the code has already been detected).
FinderTradeoff	DatacodeFinderTradeoff*	Balanced	Use 'Sensitive' for Data Matrix with narrow quiet zones. It is also more accurate for barcodes and QR codes, but slower. Use 'Robust' to better deal with damaged Data Matrix codes.
DotSize	DataCodeDotSize*	Large	Optimizes the algorithm parameters for small, medium or large dots, or for fully-printed (normal) codes. Applies to DotGrid and FinderPattern methods.
AllowBrokenEdges	Bool	true	Employs an extended edge tracker that is able to 'jump' over missing pixels. Applies primarily to the FinderEdges method.
AllowPerspective	DatacodePerspectiveLevel	Low	Allows detection of codes under perspective distortion. Use 'High' also for very big codes.
AllowDistortion	DatacodeDistortionLevel*	Low	Use 'Medium' for curved surfaces and 'High' for wrinkled ones.
AllowRotation	Bool	true	Detects rotated codes (more than 5 degrees).
MaxSlant	Real	30.0f	Maximal deviation from the right angle in the code's outline (shear).
UseSuperRes	Bool*		Controls image up-scaling for detecting very low-resolution codes (depending on MinModuleSize).
EdgeTracker	DatacodeEdgeTracker	Strong	Decides how strongly the edge tracker preserves the continuity of an edge. Strong tracker produces more consistent edges, but may accidentally connect too much.