OCRTesseract class provides an interface with the tesseract-ocr API (v3.02.02) in C++. [詳解]

#include <ocr.hpp>

cv::text::BaseOCRを継承しています。

公開メンバ関数
virtual void	run (Mat &image, std::string &output_text, std::vector< Rect > component_rects=NULL, std::vector< std::string > component_texts=NULL, std::vector< float > *component_confidences=NULL, int component_level=0) CV_OVERRIDE
	Recognize text using the tesseract-ocr API. [詳解]

virtual void	run (Mat &image, Mat &mask, std::string &output_text, std::vector< Rect > component_rects=NULL, std::vector< std::string > component_texts=NULL, std::vector< float > *component_confidences=NULL, int component_level=0) CV_OVERRIDE

CV_WRAP String	run (InputArray image, int min_confidence, int component_level=0)

CV_WRAP String	run (InputArray image, InputArray mask, int min_confidence, int component_level=0)

virtual CV_WRAP void	setWhiteList (const String &char_whitelist)=0

静的公開メンバ関数
static CV_WRAP Ptr< OCRTesseract >	create (const char datapath=NULL, const char language=NULL, const char *char_whitelist=NULL, int oem=OEM_DEFAULT, int psmode=PSM_AUTO)
	Creates an instance of the OCRTesseract class. Initializes Tesseract. [詳解]

詳解

OCRTesseract class provides an interface with the tesseract-ocr API (v3.02.02) in C++.

Notice that it is compiled only when tesseract-ocr is correctly installed.

覚え書き

(C++) An example of OCRTesseract recognition combined with scene text detection can be found at the end_to_end_recognition demo: https://github.com/opencv/opencv_contrib/blob/master/modules/text/samples/end_to_end_recognition.cpp
- (C++) Another example of OCRTesseract recognition combined with scene text detection can be found at the webcam_demo: https://github.com/opencv/opencv_contrib/blob/master/modules/text/samples/webcam_demo.cpp

関数詳解

◆ create()

static CV_WRAP Ptr< OCRTesseract > cv::text::OCRTesseract::create	(	const char *	datapath = `NULL`,
		const char *	language = `NULL`,
		const char *	char_whitelist = `NULL`,
		int	oem = `OEM_DEFAULT`,
		int	psmode = `PSM_AUTO`
	)

static

Creates an instance of the OCRTesseract class. Initializes Tesseract.

引数

datapath	the name of the parent directory of tessdata ended with "/", or NULL to use the system's default directory.
language	an ISO 639-3 code or NULL will default to "eng".
char_whitelist	specifies the list of characters used for recognition. NULL defaults to "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".
oem	tesseract-ocr offers different OCR Engine Modes (OEM), by default tesseract::OEM_DEFAULT is used. See the tesseract-ocr API documentation for other possible values.
psmode	tesseract-ocr offers different Page Segmentation Modes (PSM) tesseract::PSM_AUTO (fully automatic layout analysis) is used. See the tesseract-ocr API documentation for other possible values.

◆ run() [1/2]

virtual void cv::text::OCRTesseract::run	(	Mat &	image,
		Mat &	mask,
		std::string &	output_text,
		std::vector< Rect > *	component_rects = `NULL`,
		std::vector< std::string > *	component_texts = `NULL`,
		std::vector< float > *	component_confidences = `NULL`,
		int	component_level = `0`
	)

virtual

cv::text::BaseOCRを実装しています。

◆ run() [2/2]

virtual void cv::text::OCRTesseract::run	(	Mat &	image,
		std::string &	output_text,
		std::vector< Rect > *	component_rects = `NULL`,
		std::vector< std::string > *	component_texts = `NULL`,
		std::vector< float > *	component_confidences = `NULL`,
		int	component_level = `0`
	)

virtual

Recognize text using the tesseract-ocr API.

Takes image 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.

引数

image	Input image CV_8UC1 or CV_8UC3
output_text	Output text of the tesseract-ocr.
component_rects	If provided the method will output a list of Rects for the individual text elements found (e.g. words or text lines).
component_texts	If provided the method will output a list of text strings for the recognition of individual text elements found (e.g. words or text lines).
component_confidences	If provided the method will output a list of confidence values for the recognition of individual text elements found (e.g. words or text lines).
component_level	OCR_LEVEL_WORD (by default), or OCR_LEVEL_TEXTLINE.

cv::text::BaseOCRを実装しています。

このクラス詳解は次のファイルから抽出されました:

ocr.hpp

公開メンバ関数

静的公開メンバ関数

詳解

関数詳解

◆ create()

◆ run() [1/2]

◆ run() [2/2]