Package org.opencv.objdetect

Class GraphicalCodeDetector

java.lang.Object

org.opencv.objdetect.GraphicalCodeDetector

Direct Known Subclasses:

BarcodeDetector, QRCodeDetector, QRCodeDetectorAruco

public class GraphicalCodeDetector
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
protected long	nativeObj

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	GraphicalCodeDetector(long addr)

Method Summary

Modifier and Type	Method	Description
static GraphicalCodeDetector	__fromPtr__(long addr)
java.lang.String	decode(Mat img, Mat points)	Decodes graphical code in image once it's found by the detect() method.
java.lang.String	decode(Mat img, Mat points, Mat straight_code)	Decodes graphical code in image once it's found by the detect() method.
boolean	decodeMulti(Mat img, Mat points, java.util.List<java.lang.String> decoded_info)	Decodes graphical codes in image once it's found by the detect() method.
boolean	decodeMulti(Mat img, Mat points, java.util.List<java.lang.String> decoded_info, java.util.List<Mat> straight_code)	Decodes graphical codes in image once it's found by the detect() method.
boolean	detect(Mat img, Mat points)	Detects graphical code in image and returns the quadrangle containing the code.
java.lang.String	detectAndDecode(Mat img)	Both detects and decodes graphical code
java.lang.String	detectAndDecode(Mat img, Mat points)	Both detects and decodes graphical code
java.lang.String	detectAndDecode(Mat img, Mat points, Mat straight_code)	Both detects and decodes graphical code
boolean	detectAndDecodeMulti(Mat img, java.util.List<java.lang.String> decoded_info)	Both detects and decodes graphical codes
boolean	detectAndDecodeMulti(Mat img, java.util.List<java.lang.String> decoded_info, Mat points)	Both detects and decodes graphical codes
boolean	detectAndDecodeMulti(Mat img, java.util.List<java.lang.String> decoded_info, Mat points, java.util.List<Mat> straight_code)	Both detects and decodes graphical codes
boolean	detectMulti(Mat img, Mat points)	Detects graphical codes in image and returns the vector of the quadrangles containing the codes.
protected void	finalize()
long	getNativeObjAddr()

Methods inherited from class java.lang.Object

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

Field Detail

nativeObj

protected final long nativeObj

Constructor Detail

GraphicalCodeDetector

protected GraphicalCodeDetector(long addr)

Method Detail

getNativeObjAddr

public long getNativeObjAddr()

__fromPtr__

public static GraphicalCodeDetector __fromPtr__(long addr)

detect

public boolean detect(Mat img,
                      Mat points)

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

Parameters:

img - grayscale or color (BGR) image containing (or not) graphical code.

points - Output vector of vertices of the minimum-area quadrangle containing the code.

Returns:

automatically generated

decode

public java.lang.String decode(Mat img,
                               Mat points,
                               Mat straight_code)

Decodes graphical 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 graphical code.

points - Quadrangle vertices found by detect() method (or some other algorithm).

straight_code - The optional output image containing binarized code, will be empty if not found.

Returns:

automatically generated

decode

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

Decodes graphical 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 graphical code.

points - Quadrangle vertices found by detect() method (or some other algorithm).

Returns:

automatically generated

detectAndDecode

public java.lang.String detectAndDecode(Mat img,
                                        Mat points,
                                        Mat straight_code)

Both detects and decodes graphical code

Parameters:

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

points - optional output array of vertices of the found graphical code quadrangle, will be empty if not found.

straight_code - The optional output image containing binarized code

Returns:

automatically generated

detectAndDecode

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

Both detects and decodes graphical code

Parameters:

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

points - optional output array of vertices of the found graphical code quadrangle, will be empty if not found.

Returns:

automatically generated

detectAndDecode

public java.lang.String detectAndDecode(Mat img)

Both detects and decodes graphical code

Parameters:

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

Returns:

automatically generated

detectMulti

public boolean detectMulti(Mat img,
                           Mat points)

Detects graphical codes in image and returns the vector of the quadrangles containing the codes.

Parameters:

img - grayscale or color (BGR) image containing (or not) graphical codes.

points - Output vector of vector of vertices of the minimum-area quadrangle containing the codes.

Returns:

automatically generated

decodeMulti

public boolean decodeMulti(Mat img,
                           Mat points,
                           java.util.List<java.lang.String> decoded_info,
                           java.util.List<Mat> straight_code)

Decodes graphical codes in image once it's found by the detect() method.

Parameters:

img - grayscale or color (BGR) image containing graphical codes.

decoded_info - UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.

points - vector of Quadrangle vertices found by detect() method (or some other algorithm).

straight_code - The optional output vector of images containing binarized codes

Returns:

automatically generated

decodeMulti

public boolean decodeMulti(Mat img,
                           Mat points,
                           java.util.List<java.lang.String> decoded_info)

Decodes graphical codes in image once it's found by the detect() method.

Parameters:

img - grayscale or color (BGR) image containing graphical codes.

decoded_info - UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.

points - vector of Quadrangle vertices found by detect() method (or some other algorithm).

Returns:

automatically generated

detectAndDecodeMulti

public boolean detectAndDecodeMulti(Mat img,
                                    java.util.List<java.lang.String> decoded_info,
                                    Mat points,
                                    java.util.List<Mat> straight_code)

Both detects and decodes graphical codes

Parameters:

img - grayscale or color (BGR) image containing graphical codes.

decoded_info - UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.

points - optional output vector of vertices of the found graphical code quadrangles. Will be empty if not found.

straight_code - The optional vector of images containing binarized codes

• If there are QR codes encoded with a Structured Append mode on the image and all of them detected and decoded correctly, method writes a full message to position corresponds to 0-th code in a sequence. The rest of QR codes from the same sequence have empty string.

Returns:

automatically generated

detectAndDecodeMulti

public boolean detectAndDecodeMulti(Mat img,
                                    java.util.List<java.lang.String> decoded_info,
                                    Mat points)

Both detects and decodes graphical codes

Parameters:

img - grayscale or color (BGR) image containing graphical codes.

decoded_info - UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.

points - optional output vector of vertices of the found graphical code quadrangles. Will be empty if not found.

• If there are QR codes encoded with a Structured Append mode on the image and all of them detected and decoded correctly, method writes a full message to position corresponds to 0-th code in a sequence. The rest of QR codes from the same sequence have empty string.

Returns:

automatically generated

detectAndDecodeMulti

public boolean detectAndDecodeMulti(Mat img,
                                    java.util.List<java.lang.String> decoded_info)

Both detects and decodes graphical codes

Parameters:

img - grayscale or color (BGR) image containing graphical codes.

decoded_info - UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.

• If there are QR codes encoded with a Structured Append mode on the image and all of them detected and decoded correctly, method writes a full message to position corresponds to 0-th code in a sequence. The rest of QR codes from the same sequence have empty string.

Returns:

automatically generated

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable