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• 

  Permanently deleted user

  • 2018年02月08日 20:43

  Hi
  
  My only suggestion is, that it could have something to do with the OneWordPerLine parameter.
  What's the result when adjusting that to false ?
  
  From the help:
  OneWordPerLine  VARIANT_BOOL
  This property set to TRUE tells ABBYY FineReader Engine to presume that no text line may contain more than one word, so the lines of text will be recognized as a single word. By default this property is FALSE.
  
  Otherwise, try narrowing down by removing each property, which then automatically uses the default.
  
  Best regards
  Koen de Leijer
  
  
  

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• 

  Permanently deleted user

  • 2018年02月09日 07:24

  Please also try only to use the DocumentConversion_Accuracy predefined profile without all your settings. Is the table block detected? If not, please send your source image to SDK_Support@abbyy.com for testing on our side. Thank you!

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• 

  Permanently deleted user

  • 2018年02月15日 21:29

  Hello, everyone,

   

  thank you for your help, unfortunately that didn't help either. The current status is very curious:

  Original PDF File -> Tables detected

  PDF to BMP -> no tables are recognized in the BMP

  A section of the BMP (with Paint) and the tables are recognized.

  Is there a maximum pixel and file size for images?

   

  Br

  Tobi

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• 

  Permanently deleted user

  • 2018年02月19日 14:04

  This is possible, because during converting from PDF to BMP the resolution of the your document could have changed, as a result you get different recognition results. You can try to change resolution of your BMP file via API: Developer's Help → API Reference → Image-Related Objects → PrepareImageMode → the Resolution overwriting section. If you want to get additional recommendations, kindly send your PDF and BMP files to your region ABBYY Technical Support Team for further investigating the issue.

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• 

  Permanently deleted user

  • 2018年02月20日 10:04

  That's it! Thanks for the solution. 

  But is there another way to create a image from the pdf? Or can I increase the resolution? I get a ~100dpi image resolution from a 300dpi pdf

  My code:

  FREngine.ImageModification imgMod = engineLoader.Engine.CreateImageModification();
  FREngine.IHandle hBitmap = ImgDocument.ColorImage.GetBitmap(imgMod);
  Bitmap image = Bitmap.FromHbitmap(hBitmap.Handle);

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• 

  Permanently deleted user

  • 2018年02月22日 10:33

  Hi Tobi,

  We have successfully downloaded your documents, thank you!

  You can convert your PDF file to an image format by using the FREngine API, i.e. use the WriteToFile method of the Image object as shown below in the C# code snippet:

  ...
  // Add image file to document
  document.AddImageFile( imagePath, null, null );
  
  document.Pages.Item(0).ImageDocument.ColorImage.WriteToFile(imagePath + ".bmp", FREngine.ImageFileFormatEnum.IFF_BmpColorUncompressed, null, null);

  You can choose any image format listed among the ImageFileFormatEnum values.

  Also it is possible to change the resolution of your the image during image preprocessing stage and before recognition. You can also do it via the FREngine API by using the additional PrepareImageMode settings:

  ...
  // Add image file to document
  document.AddImageFile( imagePath, null, null );
   
  FREngine.PrepareImageMode pim = engineLoader.Engine.CreatePrepareImageMode();
  pim.AutoOverwriteResolution = false;
  pim.OverwriteResolution = true;
  pim.XResolutionToOverwrite = 300;
  pim.YResolutionToOverwrite = 300;

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