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39 lines
2.8 KiB
39 lines
2.8 KiB
Scene Text Recognition |
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====================== |
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.. highlight:: cpp |
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OCRTesseract |
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------------ |
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.. ocv:class:: OCRTesseract : public BaseOCR |
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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. :: |
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.. note:: |
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* (C++) An example of OCRTesseract recognition combined with scene text detection can be found at the end_to_end_recognition demo: https://github.com/Itseez/opencv_contrib/blob/master/modules/text/samples/end_to_end_recognition.cpp |
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OCRTesseract::create |
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-------------------- |
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Creates an instance of the OCRTesseract class. Initializes Tesseract. |
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.. ocv:function:: Ptr<OCRTesseract> OCRTesseract::create(const char* datapath=NULL, const char* language=NULL, const char* char_whitelist=NULL, int oem=(int)tesseract::OEM_DEFAULT, int psmode=(int)tesseract::PSM_AUTO) |
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:param datapath: the name of the parent directory of tessdata ended with "/", or NULL to use the system's default directory. |
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:param language: an ISO 639-3 code or NULL will default to "eng". |
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:param char_whitelist: specifies the list of characters used for recognition. NULL defaults to "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ". |
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:param oem: tesseract-ocr offers different OCR Engine Modes (OEM), by deffault tesseract::OEM_DEFAULT is used. See the tesseract-ocr API documentation for other possible values. |
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:param 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. |
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OCRTesseract::run |
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----------------- |
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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. |
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.. ocv:function:: void OCRTesseract::run(Mat& image, string& output_text, vector<Rect>* component_rects=NULL, vector<string>* component_texts=NULL, vector<float>* component_confidences=NULL, int component_level=0) |
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:param image: Input image ``CV_8UC1`` or ``CV_8UC3`` |
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:param output_text: Output text of the tesseract-ocr. |
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:param component_rects: If provided the method will output a list of Rects for the individual text elements found (e.g. words or text lines). |
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:param component_text: 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). |
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:param 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). |
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:param component_level: ``OCR_LEVEL_WORD`` (by default), or ``OCR_LEVEL_TEXT_LINE``.
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