org.bytedeco.opencv.opencv_objdetect

Class QRCodeDetector

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.opencv.opencv_objdetect.QRCodeDetector

All Implemented Interfaces:

AutoCloseable

@Namespace(value="cv")
 @NoOffset
 @Properties(inherit=opencv_objdetect.class)
public class QRCodeDetector
extends Pointer

Nested Class Summary

Nested classes/interfaces inherited from class org.bytedeco.javacpp.Pointer

Pointer.CustomDeallocator, Pointer.Deallocator, Pointer.NativeDeallocator

Field Summary

Fields inherited from class org.bytedeco.javacpp.Pointer

address, capacity, limit, position

Constructor Summary

Constructors

Constructor and Description
QRCodeDetector()
QRCodeDetector(long size) Native array allocator.
QRCodeDetector(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
BytePointer	decode(GpuMat img, GpuMat points)
BytePointer	decode(GpuMat img, GpuMat points, GpuMat straight_qrcode)
BytePointer	decode(Mat img, Mat points)
BytePointer	decode(Mat img, Mat points, Mat straight_qrcode) \brief Decodes QR code in image once it's found by the detect() method.
String	decode(UMat img, UMat points)
String	decode(UMat img, UMat points, UMat straight_qrcode)
boolean	detect(GpuMat img, GpuMat points)
boolean	detect(Mat img, Mat points) \brief Detects QR code in image and returns the quadrangle containing the code.
boolean	detect(UMat img, UMat points)
BytePointer	detectAndDecode(GpuMat img)
BytePointer	detectAndDecode(GpuMat img, GpuMat points, GpuMat straight_qrcode)
BytePointer	detectAndDecode(Mat img)
BytePointer	detectAndDecode(Mat img, Mat points, Mat straight_qrcode) \brief Both detects and decodes QR code
String	detectAndDecode(UMat img)
String	detectAndDecode(UMat img, UMat points, UMat straight_qrcode)
QRCodeDetector	position(long position)
void	setEpsX(double epsX) \brief sets the epsilon used during the horizontal scan of QR code stop marker detection.
void	setEpsY(double epsY) \brief sets the epsilon used during the vertical scan of QR code stop marker detection.

Methods inherited from class org.bytedeco.javacpp.Pointer

address, asBuffer, asByteBuffer, availablePhysicalBytes, calloc, capacity, capacity, close, deallocate, deallocate, deallocateReferences, deallocator, deallocator, equals, fill, formatBytes, free, hashCode, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetof, parseBytes, physicalBytes, position, put, realloc, setNull, sizeof, toString, totalBytes, totalPhysicalBytes, withDeallocator, zero

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

QRCodeDetector

public QRCodeDetector(Pointer p)

Pointer cast constructor. Invokes Pointer.Pointer(Pointer).

QRCodeDetector

public QRCodeDetector(long size)

Native array allocator. Access with Pointer.position(long).

QRCodeDetector

public QRCodeDetector()

Method Detail

position

public QRCodeDetector position(long position)

Overrides:

position in class Pointer

setEpsX

public void setEpsX(double epsX)

\brief 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

public void setEpsY(double epsY)

\brief 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.

detect

@Cast(value="bool")
public boolean detect(@ByVal
                                           Mat img,
                                           @ByVal
                                           Mat points)

\brief 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.

detect

@Cast(value="bool")
public boolean detect(@ByVal
                                           UMat img,
                                           @ByVal
                                           UMat points)

detect

@Cast(value="bool")
public boolean detect(@ByVal
                                           GpuMat img,
                                           @ByVal
                                           GpuMat points)

decode

@StdString
public BytePointer decode(@ByVal
                                      Mat img,
                                      @ByVal
                                      Mat points,
                                      @ByVal(nullValue="cv::OutputArray(cv::noArray())")
                                      Mat straight_qrcode)

\brief 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

decode

@StdString
public BytePointer decode(@ByVal
                                      Mat img,
                                      @ByVal
                                      Mat points)

decode

@StdString
public String decode(@ByVal
                                 UMat img,
                                 @ByVal
                                 UMat points,
                                 @ByVal(nullValue="cv::OutputArray(cv::noArray())")
                                 UMat straight_qrcode)

decode

@StdString
public String decode(@ByVal
                                 UMat img,
                                 @ByVal
                                 UMat points)

decode

@StdString
public BytePointer decode(@ByVal
                                      GpuMat img,
                                      @ByVal
                                      GpuMat points,
                                      @ByVal(nullValue="cv::OutputArray(cv::noArray())")
                                      GpuMat straight_qrcode)

decode

@StdString
public BytePointer decode(@ByVal
                                      GpuMat img,
                                      @ByVal
                                      GpuMat points)

detectAndDecode

@StdString
public BytePointer detectAndDecode(@ByVal
                                               Mat img,
                                               @ByVal(nullValue="cv::OutputArray(cv::noArray())")
                                               Mat points,
                                               @ByVal(nullValue="cv::OutputArray(cv::noArray())")
                                               Mat straight_qrcode)

\brief 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

detectAndDecode

@StdString
public BytePointer detectAndDecode(@ByVal
                                               Mat img)

detectAndDecode

@StdString
public String detectAndDecode(@ByVal
                                          UMat img,
                                          @ByVal(nullValue="cv::OutputArray(cv::noArray())")
                                          UMat points,
                                          @ByVal(nullValue="cv::OutputArray(cv::noArray())")
                                          UMat straight_qrcode)

detectAndDecode

@StdString
public String detectAndDecode(@ByVal
                                          UMat img)

detectAndDecode

@StdString
public BytePointer detectAndDecode(@ByVal
                                               GpuMat img,
                                               @ByVal(nullValue="cv::OutputArray(cv::noArray())")
                                               GpuMat points,
                                               @ByVal(nullValue="cv::OutputArray(cv::noArray())")
                                               GpuMat straight_qrcode)

detectAndDecode

@StdString
public BytePointer detectAndDecode(@ByVal
                                               GpuMat img)