Trait opencv::prelude::QRCodeDetectorTrait

pub trait QRCodeDetectorTrait {
    fn as_raw_QRCodeDetector(&self) -> *mut c_void;

    fn set_eps_x(&mut self, eps_x: f64) -> Result<()> { ... }
    fn set_eps_y(&mut self, eps_y: f64) -> Result<()> { ... }
    fn detect(
        &self, 
        img: &dyn ToInputArray, 
        points: &mut dyn ToOutputArray
    ) -> Result<bool> { ... }
    fn decode(
        &mut self, 
        img: &dyn ToInputArray, 
        points: &dyn ToInputArray, 
        straight_qrcode: &mut dyn ToOutputArray
    ) -> Result<String> { ... }
    fn detect_and_decode(
        &mut self, 
        img: &dyn ToInputArray, 
        points: &mut dyn ToOutputArray, 
        straight_qrcode: &mut dyn ToOutputArray
    ) -> Result<String> { ... }
}

Required methods

fn as_raw_QRCodeDetector(&self) -> *mut c_void

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Provided methods

fn set_eps_x(&mut self, eps_x: f64) -> Result<()>

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.

fn set_eps_y(&mut self, eps_y: f64) -> Result<()>

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.

fn detect(
    &self,
    img: &dyn ToInputArray,
    points: &mut dyn ToOutputArray
) -> Result<bool>

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.

fn decode(
    &mut self,
    img: &dyn ToInputArray,
    points: &dyn ToInputArray,
    straight_qrcode: &mut dyn ToOutputArray
) -> Result<String>

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

C++ default parameters

• straight_qrcode: noArray()

fn detect_and_decode(
    &mut self,
    img: &dyn ToInputArray,
    points: &mut dyn ToOutputArray,
    straight_qrcode: &mut dyn ToOutputArray
) -> Result<String>

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

C++ default parameters

• points: noArray()
• straight_qrcode: noArray()

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Implementors

impl QRCodeDetectorTrait for QRCodeDetector

fn as_raw_QRCodeDetector(&self) -> *mut c_void

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