Package org.opencv.objdetect
Class QRCodeDetector
- java.lang.Object
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- org.opencv.objdetect.QRCodeDetector
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public class QRCodeDetector extends Object
Groups the object candidate rectangles. rectList Input/output vector of rectangles. Output vector includes retained and grouped rectangles. (The Python list is not modified in place.) weights Input/output vector of weights of rectangles. Output vector includes weights of retained and grouped rectangles. (The Python list is not modified in place.) groupThreshold Minimum possible number of rectangles minus 1. The threshold is used in a group of rectangles to retain it. eps Relative difference between sides of the rectangles to merge them into a group.
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Field Summary
Fields Modifier and Type Field Description protected longnativeObj
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Constructor Summary
Constructors Modifier Constructor Description QRCodeDetector()protectedQRCodeDetector(long addr)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static QRCodeDetector__fromPtr__(long addr)Stringdecode(Mat img, Mat points)Decodes QR code in image once it's found by the detect() method.Stringdecode(Mat img, Mat points, Mat straight_qrcode)Decodes QR code in image once it's found by the detect() method.booleandetect(Mat img, Mat points)Detects QR code in image and returns the quadrangle containing the code.StringdetectAndDecode(Mat img)Both detects and decodes QR codeStringdetectAndDecode(Mat img, Mat points)Both detects and decodes QR codeStringdetectAndDecode(Mat img, Mat points, Mat straight_qrcode)Both detects and decodes QR codeprotected voidfinalize()longgetNativeObjAddr()voidsetEpsX(double epsX)sets the epsilon used during the horizontal scan of QR code stop marker detection.voidsetEpsY(double epsY)sets the epsilon used during the vertical scan of QR code stop marker detection.
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Method Detail
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getNativeObjAddr
public long getNativeObjAddr()
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__fromPtr__
public static QRCodeDetector __fromPtr__(long addr)
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decode
public String decode(Mat img, Mat points, Mat 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- Returns:
- automatically generated
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decode
public String decode(Mat img, Mat points)
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).- Returns:
- automatically generated
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detectAndDecode
public String detectAndDecode(Mat img, Mat points, Mat 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- Returns:
- automatically generated
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detectAndDecode
public String detectAndDecode(Mat img, Mat points)
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.- Returns:
- automatically generated
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detectAndDecode
public String detectAndDecode(Mat img)
Both detects and decodes QR code- Parameters:
img- grayscale or color (BGR) image containing QR code.- Returns:
- automatically generated
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detect
public boolean detect(Mat img, Mat 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.- Returns:
- automatically generated
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setEpsX
public void 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.
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setEpsY
public void 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.
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