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fhaddad  
#1 Posted : Thursday, April 12, 2018 2:40:42 AM(UTC)
fhaddad

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Jordan
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Hi,

I am trying out the trial,and i have some questions/cases before buying the license.

1. the first case, I tried to convert a scope of individual images into one PDF file using MultiplyImages2Pdf() code and plain text file as in your sample, one of the images list is Multi Tiff image , in this case the code OCR-ed only the first frame in the multi Tiff image but when I tried the same multi Tiff alone it worked fine, can you please help me to solve this case.

2. the second case, when i tried to extract a text from multi tiff image using api.GetTextFromImage() method , in this case i also got only the first frame from the multi tiff image, i need to OCR a multitiff image to a text not PDF,

3. i noticed that one of Init method signature has an array of languages, is that mean i can OCR the images using multiple languages at the same time, if yes can you please provide me the way to do that, if no can you please explain the different between the two signatures below.
** I need English & Arabic languages

--public void Init(Languages[] language, string dataPath = null, OcrEngineMode oem = OcrEngineMode.OEM_DEFAULT, string[] configs = null, string[] varsVec = null, string[] varsValues = null, bool setOnlyNonDebugParams = false);

--public void Init(Languages language, string dataPath = null, OcrEngineMode oem = OcrEngineMode.OEM_DEFAULT, string[] configs = null, string[] varsVec = null, string[] varsValues = null, bool setOnlyNonDebugParams = false);

Thanks in advance.
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Paul Rayman  
#2 Posted : Thursday, April 12, 2018 6:03:40 AM(UTC)
Paul Rayman

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Hi

Originally Posted by: fhaddad Go to Quoted Post

1. the first case, I tried to convert a scope of individual images into one PDF file using MultiplyImages2Pdf() code and plain text file as in your sample, one of the images list is Multi Tiff image , in this case the code OCR-ed only the first frame in the multi Tiff image but when I tried the same multi Tiff alone it worked fine, can you please help me to solve this case.


Do not use text file. Just process it by self.

Quote:

2. the second case, when i tried to extract a text from multi tiff image using api.GetTextFromImage() method , in this case i also got only the first frame from the multi tiff image, i need to OCR a multitiff image to a text not PDF,

try the following
Code:

            using (var api = OcrApi.Create())
            {
                api.Init(Languages.English);
                var image = Image.FromFile(@"D:\0\multipage.tif");
                var pages = image.GetFrameCount(FrameDimension.Page);
                for (int index = 0; index < pages; index++)
                {
                    image.SelectActiveFrame(FrameDimension.Page, index);
                    using (var bmp = new Bitmap(image.Width, image.Height))
                    {
                        using (var g = Graphics.FromImage(bmp))
                        {
                            g.DrawImage(image, 0, 0, image.Width, image.Height);
                        }
                        string text = api.GetTextFromImage(bmp);
                    }
                }
            }


Quote:

3. i noticed that one of Init method signature has an array of languages, is that mean i can OCR the images using multiple languages at the same time, if yes can you please provide me the way to do that, if no can you please explain the different between the two signatures below.
** I need English & Arabic languages


Code:

Languages[] langs = { Languages.English, Languages.Arabic };
api.Init(langs,...);


or
Code:

api.Init("eng+ara", ...)



you can download appropriate language here
https://tesseract.patagames.com/langs/

Edited by user Thursday, April 12, 2018 6:04:39 AM(UTC)  | Reason: Not specified
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thanks 1 user thanked Paul Rayman for this useful post.
fhaddad on 4/18/2018(UTC)
fhaddad  
#3 Posted : Tuesday, April 17, 2018 1:00:26 AM(UTC)
fhaddad

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Hi,

Thanks a lot for your reply.

** Regarding to first point, by business case is to convert a group of MULTI TIFF images into one PDF file because of that I tried to use the text file and didn't process the image by it self. If you can recommend any solution for my business case,,,

** Regarding to second case, your solution worked fine, Thanks a lot.

** Regarding to multi language case, I tried your solution but I got an error "System.AccessViolationException",,,

Thanks again.
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Paul Rayman  
#4 Posted : Tuesday, April 17, 2018 4:00:47 PM(UTC)
Paul Rayman

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Quote:

** Regarding to multi language case, I tried your solution but I got an error "System.AccessViolationException".


Did you download appropriate language pack? Please provide more info about exception.
Your code, call stacl etc
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thanks 1 user thanked Paul Rayman for this useful post.
fhaddad on 4/18/2018(UTC)
fhaddad  
#5 Posted : Wednesday, April 18, 2018 12:12:59 AM(UTC)
fhaddad

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Hi,

Yes I download the language using this link "https://tesseract.patagames.com/langs/" and add it to my project as below image

lang.png (8kb) downloaded 9 time(s).



Kindly note that when I'm trying Arabic language alone or English language alone it's working fine but when I'm trying both language as image below I got the error.

** My code -->

code.png (6kb) downloaded 9 time(s).


Error -->
** I got the error when call api.GetTextFromImage(..) method.

error.png (21kb) downloaded 9 time(s).


Thanks.
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Paul Rayman  
#6 Posted : Wednesday, April 18, 2018 2:09:49 AM(UTC)
Paul Rayman

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did you set up it like described here?
https://tesseract.pataga...e6-b6e9-9df777c4678c.htm
Especially a "copy to output" folder?

UserPostedImage

if so please provide your code and source image, I will check it on my side.
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fhaddad  
#7 Posted : Thursday, April 19, 2018 2:12:57 AM(UTC)
fhaddad

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Jordan
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Hi,

any Feedback/update regarding to multi tiff images


Quote:

** Regarding to first point, by business case is to convert a group of MULTI TIFF images into one PDF file because of that I tried to use the text file and didn't process the image by it self. If you can recommend any solution for my business case,,,


Quote:
Originally Posted by: fhaddad Go to Quoted Post

1. the first case, I tried to convert a scope of individual images into one PDF file using MultiplyImages2Pdf() code and plain text file as in your sample, one of the images list is Multi Tiff image , in this case the code OCR-ed only the first frame in the multi Tiff image but when I tried the same multi Tiff alone it worked fine, can you please help me to solve this case.


Do not use text file. Just process it by self.



Thanks,
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Paul Rayman  
#8 Posted : Thursday, April 19, 2018 2:31:56 AM(UTC)
Paul Rayman

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Was thanked: 133 time(s) in 130 post(s)
Quote:

** Regarding to first point, by business case is to convert a group of MULTI TIFF images into one PDF file because of that I tried to use the text file and didn't process the image by it self. If you can recommend any solution for my business case,,,


Quote:
Originally Posted by: fhaddad Go to Quoted Post

1. the first case, I tried to convert a scope of individual images into one PDF file using MultiplyImages2Pdf() code and plain text file as in your sample, one of the images list is Multi Tiff image , in this case the code OCR-ed only the first frame in the multi Tiff image but when I tried the same multi Tiff alone it worked fine, can you please help me to solve this case.


Do not use text file. Just process it by self.



Code:

using (var api = OcrApi.Create())
{
	api.Init(Languages.English);
	using (var renderer = OcrPdfRenderer.Create(@"D:\4\output_pdf", @"tessdata"))
	{
		renderer.BeginDocument("Title");
		//Get a path to tiff file and use it in the row below
		var image = Image.FromFile(@"D:\4\1_JPEG.tif");
		var pages = image.GetFrameCount(FrameDimension.Page);

		for (int index = 0; index < pages; index++)
		{
			image.SelectActiveFrame(FrameDimension.Page, index);
			using (var bmp = new Bitmap(image.Width, image.Height))
			{
				using (var g = Graphics.FromImage(bmp))
				{
					g.DrawImage(image, 0, 0, image.Width, image.Height);
				}

				using (var pix = OcrPix.FromBitmap(bmp))
				{
					api.ProcessPage(pix, null, 0, renderer);
				}
			}
		}
		//  <--------------  GoTo line 7
		renderer.EndDocument();
	}
}

Edited by user Thursday, April 19, 2018 2:35:21 AM(UTC)  | Reason: Not specified
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