OCR Extension (Tesseract)

These methods are available in:

GdPicture.NET Document Imaging SDK Ultimate.
GdPicture.NET Document Imaging SDK *.
GdPicture.NET Image SDK. *
GdPicture.NET TWAIN PRO SDK. *
GdPicture.NET TWAIN SDK. *

* A license of the optional GdPicture Tesseract Plugin is also required. This Plugin is freely included in the Ultimate edition.

Note: See PDF Creation / Building Searchable PDF & PDF/A section for PDF/OCR purpose.

Public Methods

	Name	Description
	OCRTesseractClear	this function to release from memory all information about the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractDoOCR	Starts a character recognition process on a GdPicture image or on an area of a GdPicture image defined by SetROI() function. For each language of recognition, you have to deploy specific files. See the Dictionary parameter.
	OCRTesseractGetCharBottom	This function returns the bottom position in pixel of one of the characters recognized during the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractGetCharCode	This function returns the ASCII code of one of the characters recognized during the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractGetCharConfidence	This function returns the confidence of one of the characters recognized during the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractGetCharCount	This function returns the number of characters recognized during the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractGetCharLeft	This function returns the left position in pixel of one of the characters recognized during the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractGetCharLine	This function returns the line position of one of the characters recognized during the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractGetCharRight	This function returns the right position in pixel of one of the characters recognized during the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractGetCharSpaces	This function returns the number of spaces detected before a character recognized during the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractGetCharTop	This function returns the top position in pixel of one of the characters recognized during the last OCR process done by the OCRTesseractDoOCR() function.
	OCRTesseractGetOrientation	This is the overview for the OCRTesseractGetOrientation method overload.
	OCRTesseractReinit	The tesseract engine is based on a learning algorithm. Therefore, accuracy of a character recognition process can depend on previous OCR process. this function to reinitialize the Tesseract engine in its default configuration.
	OCRTesseractSetMaxCharHeight	Defines a maximum height for recognized characters.
	OCRTesseractSetMaxCharWidth	Defines a maximum height for recognized characters.
	OCRTesseractSetMinCharHeight	Defines a minimum height for recognized characters.
	OCRTesseractSetMinCharWidth	Defines a minimum width for recognized characters.
	OCRTesseractSetPassCount	Set the number of 'learning pass' for each recognition process (1 by default). A value between 2 and 5 can increase quality of recognition. A value of 2 is recommended for full page OCR process.

Top

What do you think about this topic? Send feedback!