cv::QRCodeDetector Class Reference

#include <objdetect.hpp>

Inheritance diagram for cv::QRCodeDetector:

Public Member Functions
CV_WRAP	QRCodeDetector ()
CV_WRAP QRCodeDetector &	setEpsX (double epsX)
	sets the epsilon used during the horizontal scan of QR code stop marker detection. More...
CV_WRAP QRCodeDetector &	setEpsY (double epsY)
	sets the epsilon used during the vertical scan of QR code stop marker detection. More...
CV_WRAP QRCodeDetector &	setUseAlignmentMarkers (bool useAlignmentMarkers)
	use markers to improve the position of the corners of the QR code More...
CV_WRAP cv::String	decodeCurved (InputArray img, InputArray points, OutputArray straight_qrcode=noArray())
	Decodes QR code on a curved surface in image once it's found by the detect() method. More...
CV_WRAP std::string	detectAndDecodeCurved (InputArray img, OutputArray points=noArray(), OutputArray straight_qrcode=noArray())
	Both detects and decodes QR code on a curved surface. More...
Public Member Functions inherited from cv::GraphicalCodeDetector
CV_DEPRECATED_EXTERNAL	GraphicalCodeDetector ()
	GraphicalCodeDetector (const GraphicalCodeDetector &)=default
	GraphicalCodeDetector (GraphicalCodeDetector &&)=default
GraphicalCodeDetector &	operator= (const GraphicalCodeDetector &)=default
GraphicalCodeDetector &	operator= (GraphicalCodeDetector &&)=default
CV_WRAP bool	detect (InputArray img, OutputArray points) const
	Detects graphical code in image and returns the quadrangle containing the code. More...
CV_WRAP std::string	decode (InputArray img, InputArray points, OutputArray straight_code=noArray()) const
	Decodes graphical code in image once it's found by the detect() method. More...
CV_WRAP std::string	detectAndDecode (InputArray img, OutputArray points=noArray(), OutputArray straight_code=noArray()) const
	Both detects and decodes graphical code. More...
CV_WRAP bool	detectMulti (InputArray img, OutputArray points) const
	Detects graphical codes in image and returns the vector of the quadrangles containing the codes. More...
CV_WRAP bool	decodeMulti (InputArray img, InputArray points, CV_OUT std::vector< std::string > &decoded_info, OutputArrayOfArrays straight_code=noArray()) const
	Decodes graphical codes in image once it's found by the detect() method. More...
CV_WRAP bool	detectAndDecodeMulti (InputArray img, CV_OUT std::vector< std::string > &decoded_info, OutputArray points=noArray(), OutputArrayOfArrays straight_code=noArray()) const
	Both detects and decodes graphical codes. More...

Additional Inherited Members
Protected Attributes inherited from cv::GraphicalCodeDetector
Ptr< Impl >	p

Constructor & Destructor Documentation

QRCodeDetector()

CV_WRAP cv::QRCodeDetector::QRCodeDetector

(

)

Member Function Documentation

decodeCurved()

CV_WRAP cv::String cv::QRCodeDetector::decodeCurved	(	InputArray	img,
		InputArray	points,
		OutputArray	straight_qrcode = noArray()
	)

Decodes QR code on a curved surface in image once it's found by the detect() method.

Returns UTF8-encoded output string or empty string if the code cannot be decoded.

Parameters

img	grayscale or color (BGR) image containing QR code.
points	Quadrangle vertices found by detect() method (or some other algorithm).
straight_qrcode	The optional output image containing rectified and binarized QR code

detectAndDecodeCurved()

CV_WRAP std::string cv::QRCodeDetector::detectAndDecodeCurved	(	InputArray	img,
		OutputArray	points = noArray(),
		OutputArray	straight_qrcode = noArray()
	)

Both detects and decodes QR code on a curved surface.

Parameters

img	grayscale or color (BGR) image containing QR code.
points	optional output array of vertices of the found QR code quadrangle. Will be empty if not found.
straight_qrcode	The optional output image containing rectified and binarized QR code

setEpsX()

CV_WRAP QRCodeDetector& cv::QRCodeDetector::setEpsX

(

double

epsX

)

sets the epsilon used during the horizontal scan of QR code stop marker detection.

Parameters

epsX	Epsilon neighborhood, which allows you to determine the horizontal pattern of the scheme 1:1:3:1:1 according to QR code standard.

setEpsY()

CV_WRAP QRCodeDetector& cv::QRCodeDetector::setEpsY

(

double

epsY

)

sets the epsilon used during the vertical scan of QR code stop marker detection.

Parameters

epsY	Epsilon neighborhood, which allows you to determine the vertical pattern of the scheme 1:1:3:1:1 according to QR code standard.

setUseAlignmentMarkers()

CV_WRAP QRCodeDetector& cv::QRCodeDetector::setUseAlignmentMarkers

(

bool

useAlignmentMarkers

)

use markers to improve the position of the corners of the QR code

alignmentMarkers using by default

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The documentation for this class was generated from the following file:

• build/release/_deps/opencv-src/include/opencv4/opencv2/objdetect.hpp