QRCodeDetector class

Inheritance

• Object
• CvObject<QRCodeDetector>
• ICvStruct<QRCodeDetector>
• CvStruct<QRCodeDetector>
• QRCodeDetector

Available extensions

• QRCodeDetectorAsync

Constructors

QRCodeDetector.empty()

factory

QRCodeDetector.fromPointer(QRCodeDetectorPtr ptr, [bool attach = true])

factory

Properties

hashCode → int

The hash code for this object.

no setter, inherited

props → List<Object?>

no setter, inherited

ptr ↔ Pointer<QRCodeDetector>

getter/setter pair, inherited

ref → QRCodeDetector

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

decode(InputArray img, {VecPoint? points, Mat? straightCode}) → (String, VecPoint?, Mat?)

Decode 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.

decodeAsync(InputArray img) → Future<(String, VecPoint?, Mat?)>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

decodeCurved(InputArray img, VecPoint points, {OutputArray? straightQRcode}) → (String, Mat)

Decodes QR code on a curved surface in image once it's found by the detect() method.

decodeCurvedAsync(InputArray img, VecPoint points) → Future<(String, Mat)>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

detect(InputArray input, {VecPoint? points}) → (bool, VecPoint)

Detect detects QR code in image and returns the quadrangle containing the code.

detectAndDecode(InputArray img, {VecPoint? points, OutputArray? straightCode}) → (String, VecPoint, Mat)

DetectAndDecode Both detects and decodes QR code.

detectAndDecodeAsync(InputArray img) → Future<(String, VecPoint, Mat)>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

detectAndDecodeCurved(InputArray img, {VecPoint? points, Mat? straightQRcode}) → (String, VecPoint, Mat)

Both detects and decodes QR code on a curved surface.

detectAndDecodeCurvedAsync(InputArray img) → Future<(String, VecPoint, Mat)>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

detectAndDecodeMulti(InputArray img) → (bool, List<String>, VecPoint, VecMat)

Detects QR codes in image, finds the quadrangles containing the codes, and decodes the QRCodes to strings.

detectAndDecodeMultiAsync(InputArray img) → Future<(bool, List<String>, VecPoint, VecMat)>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

detectAsync(InputArray input, {VecPoint? points}) → Future<(bool, VecPoint)>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

detectMulti(InputArray img, {VecPoint? points}) → (bool, VecPoint)

Detects QR codes in image and finds of the quadrangles containing the codes.

detectMultiAsync(InputArray img) → Future<(bool, VecPoint)>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

dispose() → void

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

setEpsX(double epsX) → void

setEpsXAsync(double epsX) → Future<void>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

setEpsY(double epsY) → void

setEpsYAsync(double epsY) → Future<void>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

setUseAlignmentMarkers(bool useAlignmentMarkers) → void

setUseAlignmentMarkersAsync(bool useAlignmentMarkers) → Future<void>

Available on QRCodeDetector, provided by the QRCodeDetectorAsync extension

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Properties

finalizer → NativeFinalizer

final