Hello, We have a Windows form application which utilizes GdPicture.NET v6 with the tesseract OCR plugin. Every once in a while a customer reports getting a popup message that is coming from GDPicture saying "OCR: Exception thrown by the target of an invocation". As this issue only on occas...

Thanks. I will play around with it some more to see what all the capabilities exist. On a related note, when overlaying images, is there a way to quickly turn on/off the display of the second image without extensive image processing needing to be done? For example, I am thinking of allowing the user...

Thanks Loic. Works good.

Hi Loic, I attached my sample project. I just took the OCR sample project shipped with GdPicture.NET and added a Tools menu with 'Copy to Clipboard' menu item plus support to open PDF files. Please check and let me know if I am misunderstanding something with the behavior of copying a selected area ...

Hi, I am dealing with CAD drawings stored in PDF format which have rotated text. Is there a way using the selection tool in GdViewer to select an area at the same angle as the rotated text instead of just horizontally so that the text can then be read with OCR more easily? Otherwise, after copying t...

Hi there, I have been reading about how GdPicture can compare images and also overlay images on top of each. But, I am wondering if there is a way using the API to overlay images and highlight the differences perhaps with a different color. I'm dealing with mostly B/W images and need a way to highli...

Hello, I am trying to use the CopyToClipboard() function on the GdPictureImaging object as follows but noticed when dealing with PDFs the image copied is from somewhere else in the PDF as if the coordinates aren't matching up somewhere. Things seem to work just fine with image files though. Am I doi...

Hi Loic, An interesting observation I'm seeing with ConvertTo1BppFast versus ConvertTo1Bpp is that the resulting image generally looks better and ultimately results in better OCR performance when ConvertTo1BppFast is used even if the image being processed is not guaranteed to be black and white only...

Can someone provide more details on how these two methods are different? I had been using GdPictureImaging.ConvertTo1BppFast() for performance reasons before having an image go through the OCR plugin but have discovered that in some cases the resulting image is not acceptable (ie: completely black) ...

I'm using a custom dictionary as I needed the +/- character to be picked up by the OCR engine better so I don't have a quick and easy way of providing an example. But I suspect if you tried OCR captures on an image containing characters in the upper 128 ASCII code range (characters like +/- or the d...

Hi Loic, After further investigation, I am coming to the conclusion that Tesseract OCR is limited within GdPicture to ASCII characters. Is this correct? And even within the ASCII character code range (0x00 to 0xFF), the upper 128 characters might not map correctly if run in different language enviro...

I am also interested in doing this. So far I have just overwritten a language file set I am not using (for example, Vietamese) with my new language files. It would be nice if GDPicture has a way to define/add a new language in addition to the ones that ship with Tesseract by default.

Hi, I am getting feedback that the OCR functionality within GDPicture does not perform well (if at all) when running within a Japanese Windows XP environment. We are in the process of upgrading to the latest GDPicture/OCR plugin to see if that helps, but I wanted to see if there were any known probl...

Hello, I'm curious if anyone has had intermittent failures when calling the OCRTesseractDoOCR method on the GdPictureImaging class. It appears that the status value returned by this method will occasionally read 'Generic Error' for me. I am using version 1.0.0.3 of the OCR plugin from Feb. 2009. I w...