Package org.opencv.objdetect

Class QRCodeDetector

java.lang.Object

org.opencv.objdetect.GraphicalCodeDetector

org.opencv.objdetect.QRCodeDetector

public class QRCodeDetector
extends GraphicalCodeDetector

Field Summary

Fields inherited from class org.opencv.objdetect.GraphicalCodeDetector

nativeObj

Constructor Summary

Constructors

Modifier	Constructor	Description
	QRCodeDetector()
protected	QRCodeDetector(long addr)

Method Summary

Modifier and Type	Method	Description
static QRCodeDetector	__fromPtr__(long addr)
java.lang.String	decodeCurved(Mat img, Mat points)	Decodes QR code on a curved surface in image once it's found by the detect() method.
java.lang.String	decodeCurved(Mat img, Mat points, Mat straight_qrcode)	Decodes QR code on a curved surface in image once it's found by the detect() method.
java.lang.String	detectAndDecodeCurved(Mat img)	Both detects and decodes QR code on a curved surface
java.lang.String	detectAndDecodeCurved(Mat img, Mat points)	Both detects and decodes QR code on a curved surface
java.lang.String	detectAndDecodeCurved(Mat img, Mat points, Mat straight_qrcode)	Both detects and decodes QR code on a curved surface
protected void	finalize()
int	getEncoding()	Returns a kind of encoding for the decoded info from the latest REF: decode or REF: detectAndDecode call When REF: decode or REF: detectAndDecode is used, valid value is zero.
int	getEncoding(int codeIdx)	Returns a kind of encoding for the decoded info from the latest REF: decode or REF: detectAndDecode call
QRCodeDetector	setEpsX(double epsX)	sets the epsilon used during the horizontal scan of QR code stop marker detection.
QRCodeDetector	setEpsY(double epsY)	sets the epsilon used during the vertical scan of QR code stop marker detection.
QRCodeDetector	setUseAlignmentMarkers(boolean useAlignmentMarkers)	use markers to improve the position of the corners of the QR code alignmentMarkers using by default

Methods inherited from class org.opencv.objdetect.GraphicalCodeDetector

decode, decode, decodeBytes, decodeBytes, decodeBytesMulti, decodeBytesMulti, decodeMulti, decodeMulti, detect, detectAndDecode, detectAndDecode, detectAndDecode, detectAndDecodeBytes, detectAndDecodeBytes, detectAndDecodeBytes, detectAndDecodeBytesMulti, detectAndDecodeBytesMulti, detectAndDecodeBytesMulti, detectAndDecodeMulti, detectAndDecodeMulti, detectAndDecodeMulti, detectMulti, getNativeObjAddr

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QRCodeDetector

protected QRCodeDetector(long addr)

QRCodeDetector

public QRCodeDetector()

Method Detail

__fromPtr__

public static QRCodeDetector __fromPtr__(long addr)

setEpsX

public 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.

Returns:

automatically generated

setEpsY

public 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.

Returns:

automatically generated

setUseAlignmentMarkers

public QRCodeDetector setUseAlignmentMarkers(boolean useAlignmentMarkers)

use markers to improve the position of the corners of the QR code alignmentMarkers using by default

Parameters:

useAlignmentMarkers - automatically generated

Returns:

automatically generated

decodeCurved

public java.lang.String decodeCurved(Mat img,
                                     Mat points,
                                     Mat straight_qrcode)

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

Returns:

automatically generated

decodeCurved

public java.lang.String decodeCurved(Mat img,
                                     Mat points)

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).

Returns:

automatically generated

detectAndDecodeCurved

public java.lang.String detectAndDecodeCurved(Mat img,
                                              Mat points,
                                              Mat straight_qrcode)

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

Returns:

automatically generated

detectAndDecodeCurved

public java.lang.String detectAndDecodeCurved(Mat img,
                                              Mat points)

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.

Returns:

automatically generated

detectAndDecodeCurved

public java.lang.String detectAndDecodeCurved(Mat img)

Both detects and decodes QR code on a curved surface

Parameters:

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

Returns:

automatically generated

getEncoding

public int getEncoding(int codeIdx)

Returns a kind of encoding for the decoded info from the latest REF: decode or REF: detectAndDecode call

Parameters:

codeIdx - an index of the previously decoded QR code. When REF: decode or REF: detectAndDecode is used, valid value is zero. For REF: decodeMulti or REF: detectAndDecodeMulti use indices corresponding to the output order.

Returns:

automatically generated

getEncoding

public int getEncoding()

Returns a kind of encoding for the decoded info from the latest REF: decode or REF: detectAndDecode call When REF: decode or REF: detectAndDecode is used, valid value is zero. For REF: decodeMulti or REF: detectAndDecodeMulti use indices corresponding to the output order.

Returns:

automatically generated

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class GraphicalCodeDetector

Throws:

java.lang.Throwable