PDF page split based on Image

vinod kumar

Hello,

I need to find a particular image in PDF (i.e X Mark). If that image is found then my PDF page count should end and split the file.

Eg:- I have a PDF file that has 10 pages. The 6th page of PDF contains image (X), so it has to split page 1 to 5 and save as the file Page 1 to 5.pdf. Remaining 7 to 10 pages should again split and save as Page 7 to 10.pdf

Below is the image (X) for your reference.

Regards,

Vinod

2 Replies

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Marvin Reid5y ago
A key factor in this implementation is that you would need to detect this image before you split the PDF file. To do this, you can use the CorrelationCommand provided by the LEADTOOLS SDK. This will allow you to compare a part of an image and find portions where a match is found. From this, you can then use this as a determining factor to split your pdf. You can try building off the following code:
string path = @"path of PDF file";
RasterCodecs codecs = new RasterCodecs();
CorrelationCommand command = new CorrelationCommand();
CodecsImageInfo info = codecs.GetInformation(path, true); //number of pages

RasterImage image = codecs.Load(path);
RasterImage detectimage = codecs.Load(@"image to compare to");

int correlationThreshold = 100; // // can be adjusted
command.CorrelationImage = detectimage;
command.Threshold = 70; // can be adjusted
command.XStep = 1;
command.YStep = 1;

for (int pageNumber = 1; pageNumber <= info.TotalPages; pageNumber++)
{
   command.Run(image);

   if (command.Points != null)
   {
      // Split
      codecs.Save(image, @"output pdf path", RasterImageFormat.RasPdf,0,pageNumber,info.TotalPages,1,CodecsSa vePageMode.Append);
   }
   codecs.Load(path, pageNumber); // load next page of pdf
}
https://www.leadtools.com/help/sdk/v21/dh/po/correlationcommand.html
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Leon D6y ago
You can use Spire.PDF API to split PDF files. Refer the following article:

https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Document-Operation/Split-PDF-into-Multiple-PDFs-using-a-Range-of-Pages-in-C-VB.NET.html
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