Package org.opencv.text

Class OCRHMMDecoder

  • public class OCRHMMDecoder
extends BaseOCR
    OCRHMMDecoder class provides an interface for OCR using Hidden Markov Models. Note:
    • (C++) An example on using OCRHMMDecoder recognition combined with scene text detection can be found at the webcam_demo sample: <https://github.com/opencv/opencv_contrib/blob/master/modules/text/samples/webcam_demo.cpp>

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected OCRHMMDecoder​(long addr)  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static OCRHMMDecoder __fromPtr__​(long addr)  
      static OCRHMMDecoder create​(java.lang.String filename, java.lang.String vocabulary, Mat transition_probabilities_table, Mat emission_probabilities_table)
      Creates an instance of the OCRHMMDecoder class.
      static OCRHMMDecoder create​(java.lang.String filename, java.lang.String vocabulary, Mat transition_probabilities_table, Mat emission_probabilities_table, int mode)
      Creates an instance of the OCRHMMDecoder class.
      static OCRHMMDecoder create​(java.lang.String filename, java.lang.String vocabulary, Mat transition_probabilities_table, Mat emission_probabilities_table, int mode, int classifier)
      Creates an instance of the OCRHMMDecoder class.
      protected void finalize()  
      java.lang.String run​(Mat image, int min_confidence)
      Recognize text using HMM.
      java.lang.String run​(Mat image, int min_confidence, int component_level)
      Recognize text using HMM.
      java.lang.String run​(Mat image, Mat mask, int min_confidence)  
      java.lang.String run​(Mat image, Mat mask, int min_confidence, int component_level)  

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • OCRHMMDecoder

        protected OCRHMMDecoder​(long addr)

    • Method Detail

      • __fromPtr__

        public static OCRHMMDecoder __fromPtr__​(long addr)

      • create

        public static OCRHMMDecoder create​(java.lang.String filename,
                                   java.lang.String vocabulary,
                                   Mat transition_probabilities_table,
                                   Mat emission_probabilities_table,
                                   int mode,
                                   int classifier)
        Creates an instance of the OCRHMMDecoder class. Loads and initializes HMMDecoder from the specified path
        Parameters:
        filename - automatically generated
        vocabulary - automatically generated
        transition_probabilities_table - automatically generated
        emission_probabilities_table - automatically generated
        mode - automatically generated
        classifier - automatically generated
        Returns:
        automatically generated

      • create

        public static OCRHMMDecoder create​(java.lang.String filename,
                                   java.lang.String vocabulary,
                                   Mat transition_probabilities_table,
                                   Mat emission_probabilities_table,
                                   int mode)
        Creates an instance of the OCRHMMDecoder class. Loads and initializes HMMDecoder from the specified path
        Parameters:
        filename - automatically generated
        vocabulary - automatically generated
        transition_probabilities_table - automatically generated
        emission_probabilities_table - automatically generated
        mode - automatically generated
        Returns:
        automatically generated

      • create

        public static OCRHMMDecoder create​(java.lang.String filename,
                                   java.lang.String vocabulary,
                                   Mat transition_probabilities_table,
                                   Mat emission_probabilities_table)
        Creates an instance of the OCRHMMDecoder class. Loads and initializes HMMDecoder from the specified path
        Parameters:
        filename - automatically generated
        vocabulary - automatically generated
        transition_probabilities_table - automatically generated
        emission_probabilities_table - automatically generated
        Returns:
        automatically generated

      • run

        public java.lang.String run​(Mat image,
                            Mat mask,
                            int min_confidence,
                            int component_level)

      • run

        public java.lang.String run​(Mat image,
                            Mat mask,
                            int min_confidence)

      • run

        public java.lang.String run​(Mat image,
                            int min_confidence,
                            int component_level)
        Recognize text using HMM. Takes an image and a mask (where each connected component corresponds to a segmented character) on input and returns recognized text in the output_text parameter. Optionally provides also the Rects for individual text elements found (e.g. words), and the list of those text elements with their confidence values.
        Parameters:
        image - Input image CV_8UC1 or CV_8UC3 with a single text line (or word). text elements found (e.g. words). recognition of individual text elements found (e.g. words). for the recognition of individual text elements found (e.g. words).
        component_level - Only OCR_LEVEL_WORD is supported.
        min_confidence - automatically generated
        Returns:
        automatically generated

      • run

        public java.lang.String run​(Mat image,
                            int min_confidence)
        Recognize text using HMM. Takes an image and a mask (where each connected component corresponds to a segmented character) on input and returns recognized text in the output_text parameter. Optionally provides also the Rects for individual text elements found (e.g. words), and the list of those text elements with their confidence values.
        Parameters:
        image - Input image CV_8UC1 or CV_8UC3 with a single text line (or word). text elements found (e.g. words). recognition of individual text elements found (e.g. words). for the recognition of individual text elements found (e.g. words).
        min_confidence - automatically generated
        Returns:
        automatically generated

      • finalize

        protected void finalize()
                 throws java.lang.Throwable
        Overrides:
        finalize in class BaseOCR
        Throws:
        java.lang.Throwable