cv::QRCodeDetector Class Reference

#include <opencv2/objdetect.hpp>

Public Member Functions
	QRCodeDetector ()
	~QRCodeDetector ()
cv::String	decode (InputArray img, InputArray points, OutputArray straight_qrcode=noArray())
	Decodes QR code in image once it's found by the detect() method. Returns UTF8-encoded output string or empty string if the code cannot be decoded. More...
bool	detect (InputArray img, OutputArray points) const
	Detects QR code in image and returns the quadrangle containing the code. More...
cv::String	detectAndDecode (InputArray img, OutputArray points=noArray(), OutputArray straight_qrcode=noArray())
	Both detects and decodes QR code. More...
void	setEpsX (double epsX)
	sets the epsilon used during the horizontal scan of QR code stop marker detection. More...
void	setEpsY (double epsY)
	sets the epsilon used during the vertical scan of QR code stop marker detection. More...

Protected Attributes
Ptr< Impl >	p

Constructor & Destructor Documentation

QRCodeDetector()

cv::QRCodeDetector::QRCodeDetector

(

)

Python:
	<QRCodeDetector object>	=	cv.QRCodeDetector(		)

~QRCodeDetector()

cv::QRCodeDetector::~QRCodeDetector

(

)

Member Function Documentation

decode()

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

Python:
	retval, straight_qrcode	=	cv.QRCodeDetector.decode(	img, points[, straight_qrcode]	)

Decodes QR code 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

detect()

bool cv::QRCodeDetector::detect	(	InputArray	img,
		OutputArray	points
	)		const

Python:
	retval, points	=	cv.QRCodeDetector.detect(	img[, points]	)

Detects QR code in image and returns the quadrangle containing the code.

Parameters

img	grayscale or color (BGR) image containing (or not) QR code.
points	Output vector of vertices of the minimum-area quadrangle containing the code.

detectAndDecode()

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

Python:
	retval, points, straight_qrcode	=	cv.QRCodeDetector.detectAndDecode(	img[, points[, straight_qrcode]]	)

Both detects and decodes QR code.

Parameters

img	grayscale or color (BGR) image containing QR code.
points	opiotnal 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()

void cv::QRCodeDetector::setEpsX

(

double

epsX

)

Python:
	None	=	cv.QRCodeDetector.setEpsX(	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()

void cv::QRCodeDetector::setEpsY

(

double

epsY

)

Python:
	None	=	cv.QRCodeDetector.setEpsY(	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.

Member Data Documentation

p

Ptr<Impl> cv::QRCodeDetector::p

protected

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

• opencv2/objdetect.hpp