Struct opencv::text::OCRBeamSearchDecoder

pub struct OCRBeamSearchDecoder { /* fields omitted */ }

OCRBeamSearchDecoder class provides an interface for OCR using Beam Search algorithm.

Note:

• (C++) An example on using OCRBeamSearchDecoder recognition combined with scene text detection can be found at the demo sample: https://github.com/opencv/opencv_contrib/blob/master/modules/text/samples/word_recognition.cpp

Implementations

impl OCRBeamSearchDecoder

pub fn as_raw_OCRBeamSearchDecoder(&self) -> *const c_void

pub fn as_raw_mut_OCRBeamSearchDecoder(&mut self) -> *mut c_void

impl OCRBeamSearchDecoder

pub fn create(
    classifier: Ptr<OCRBeamSearchDecoder_ClassifierCallback>,
    vocabulary: &str,
    transition_probabilities_table: &dyn ToInputArray,
    emission_probabilities_table: &dyn ToInputArray,
    mode: decoder_mode,
    beam_size: i32
) -> Result<Ptr<OCRBeamSearchDecoder>>

Creates an instance of the OCRBeamSearchDecoder class. Initializes HMMDecoder.

Parameters

• classifier: The character classifier with built in feature extractor.

• vocabulary: The language vocabulary (chars when ASCII English text). vocabulary.size() must be equal to the number of classes of the classifier.

• transition_probabilities_table: Table with transition probabilities between character pairs. cols == rows == vocabulary.size().

• emission_probabilities_table: Table with observation emission probabilities. cols == rows == vocabulary.size().

• mode: HMM Decoding algorithm. Only OCR_DECODER_VITERBI is available for the moment (http://en.wikipedia.org/wiki/Viterbi_algorithm).

• beam_size: Size of the beam in Beam Search algorithm.

C++ default parameters

• mode: OCR_DECODER_VITERBI
• beam_size: 500

pub fn create_1(
    filename: &str,
    vocabulary: &str,
    transition_probabilities_table: &dyn ToInputArray,
    emission_probabilities_table: &dyn ToInputArray,
    mode: decoder_mode,
    beam_size: i32
) -> Result<Ptr<OCRBeamSearchDecoder>>

Creates an instance of the OCRBeamSearchDecoder class. Initializes HMMDecoder from the specified path.

Creates an instance of the OCRBeamSearchDecoder class. Initializes HMMDecoder.

Parameters

• classifier: The character classifier with built in feature extractor.

• vocabulary: The language vocabulary (chars when ASCII English text). vocabulary.size() must be equal to the number of classes of the classifier.

• transition_probabilities_table: Table with transition probabilities between character pairs. cols == rows == vocabulary.size().

• emission_probabilities_table: Table with observation emission probabilities. cols == rows == vocabulary.size().

• mode: HMM Decoding algorithm. Only OCR_DECODER_VITERBI is available for the moment (http://en.wikipedia.org/wiki/Viterbi_algorithm).

• beam_size: Size of the beam in Beam Search algorithm.

Overloaded parameters

C++ default parameters

• mode: OCR_DECODER_VITERBI
• beam_size: 500

Trait Implementations

impl BaseOCR for OCRBeamSearchDecoder

pub fn as_raw_BaseOCR(&self) -> *const c_void

pub fn as_raw_mut_BaseOCR(&mut self) -> *mut c_void

pub fn run(
    &mut self,
    image: &mut Mat,
    output_text: &mut String,
    component_rects: &mut Vector<Rect>,
    component_texts: &mut Vector<String>,
    component_confidences: &mut Vector<f32>,
    component_level: i32
) -> Result<()>

C++ default parameters

pub fn run_mask(
    &mut self,
    image: &mut Mat,
    mask: &mut Mat,
    output_text: &mut String,
    component_rects: &mut Vector<Rect>,
    component_texts: &mut Vector<String>,
    component_confidences: &mut Vector<f32>,
    component_level: i32
) -> Result<()>

C++ default parameters

impl Boxed for OCRBeamSearchDecoder

pub unsafe fn from_raw(ptr: *mut c_void) -> Self

Wrap the specified raw pointer

pub fn into_raw(self) -> *mut c_void

Return an the underlying raw pointer while consuming this wrapper.

pub fn as_raw(&self) -> *const c_void

Return the underlying raw pointer.

pub fn as_raw_mut(&mut self) -> *mut c_void

Return the underlying mutable raw pointer

impl Drop for OCRBeamSearchDecoder

pub fn drop(&mut self)

Executes the destructor for this type.

impl OCRBeamSearchDecoderTrait for OCRBeamSearchDecoder

pub fn as_raw_OCRBeamSearchDecoder(&self) -> *const c_void

pub fn as_raw_mut_OCRBeamSearchDecoder(&mut self) -> *mut c_void

pub fn run_multiple(
    &mut self,
    image: &mut Mat,
    output_text: &mut String,
    component_rects: &mut Vector<Rect>,
    component_texts: &mut Vector<String>,
    component_confidences: &mut Vector<f32>,
    component_level: i32
) -> Result<()>

Recognize text using Beam Search.

pub fn run_multiple_mask(
    &mut self,
    image: &mut Mat,
    mask: &mut Mat,
    output_text: &mut String,
    component_rects: &mut Vector<Rect>,
    component_texts: &mut Vector<String>,
    component_confidences: &mut Vector<f32>,
    component_level: i32
) -> Result<()>

C++ default parameters

pub fn run(
    &mut self,
    image: &dyn ToInputArray,
    min_confidence: i32,
    component_level: i32
) -> Result<String>

C++ default parameters

pub fn run_mask(
    &mut self,
    image: &dyn ToInputArray,
    mask: &dyn ToInputArray,
    min_confidence: i32,
    component_level: i32
) -> Result<String>

C++ default parameters

impl Send for OCRBeamSearchDecoder