Processing Methods of the Engine Object

Processing methods of the Engine Object in the ABBYY FineReader Engine API — overview of the methods used to open, convert, and process image and PDF files directly at the Engine level.

The Engine object exposes a set of processing methods. They are used to open and convert image files or bitmaps (win), or process an image/PDF file directly. However, using the methods of the FRDocument object is more convenient in most scenarios.

Name	Description
GetNumberOfPagesInImageFile	Returns the number of pages in an image file.
InjectTextLayer	Processes the input PDF file and creates a searchable PDF file of the “image on text” type which contains the same page images and the text layer created from the recognized text.
IsPdfPortfolio	Determines if a PDF file is a PDF Portfolio.
IsPdfPortfolioFromStream	Determines if a PDF file added from the stream is a PDF Portfolio.
IsPdfWithTextualContent	Determines if any of the pages of a PDF file contains text layer.
IsPdfWithTextualContentFromStream	Determines if any of the pages of a PDF file added from the stream contains text layer.
LoadImageDoc	Restores the contents of the ImageDocument object from the folder on disk.
LoadImageDocFromFile	Restores the contents of the ImageDocument object from the file previously saved with the help of the IImageDocument::SaveToFile method.
LoadImageDocFromMemory Note: Implemented for Windows.	Restores the contents of the ImageDocument object from the global memory, where it was previously saved by the IImageDocument::SaveToMemory method.
OpenBitmap	Opens the specified bitmap image (HBITMAP). Note: Not implemented for Linux and macOS.
OpenBitmapBits	Opens the specified bitmap data. Note: Not implemented for Linux and macOS.
OpenDib	Opens the specified device-independent bitmap. Note: Not implemented for Linux and macOS.
OpenImageFileFromMemory	Opens an image file from the global memory, where it was previously loaded by the user.
PrepareBitmap	Creates a copy of the specified bitmap image (HBITMAP) in FineReader Engine internal image format. Note: Not implemented for Linux and macOS.
PrepareBitmapBits	Creates a copy of the specified bitmap data in FineReader Engine internal image format. Note: Not implemented for Linux and macOS.
PrepareDib	Creates a copy of the specified device-independent bitmap in FineReader Engine internal image format. Note: Not implemented for Linux and macOS.
RecognizeImageFile	Opens the specified image file, performs its preprocessing, layout analysis, recognition, page and document synthesis, and exports the recognized text into the selected output format.

See also

Engine