I have a PDF file which contains just 1 Page. I have a barcode at the end of the page.
How do I extract the barcode number from the PDF in C#
I have seen a post to convert barcode Image to Code 39 but how do we do it from PDF, Please help
barcode image to Code39 conversion in C#?
Thanks
Your best bet is to get a PDF library that can extract images from the pages. We use Aspose.PDF and Aspose.PDF.Kit, which are both excellent products.
http://www.aspose.com
This page shows a code example of how to extract an image from a PDF document:
http://www.aspose.com/documentation/.net-components/aspose.pdf.kit-for-.net/extract-image-from-pdf-document.html
They also have a Barcode library, and one of the things it can do is read barcodes from multi-page tiff images. You could convert the pages of your PDF to TIFF and then use the barcode library to read the barcodes:
http://www.aspose.com/documentation/.net-components/aspose.barcode-for-.net/how-to-read-barcode-from-multipage-tiff-images.html
You can use iTextSharp library to convert the PDF to an image and then a barcode reading library such as IBScanner to extract the barcode(s) from the image.
Related
I am currently developing a web application where i have to generate a PDF with an image in it. I have to use iTextSharp 4.1.6 because it is the last LGPL version. The previous version of our app used v5.5.11.
The image is dynamically created at runtime as byte[]. This would work fine in iTextSharp 5.5.11. However, with 4.1.6 it doesn't display the image in the PDF file.
When i use a hardcoded path as image source instead of the byte[], it displays the image just like i want.
//This works
Image qrCode = Image.GetInstance(#"C:\Users\Me\Pictures\asdf.jpg");
//This doesn´t
Image qrCode = Image.GetInstance(QRGenerator.GenerateQRCode(ticketUrl));
Thank you in advance for your help.
I have used morris.js charts. Now I want to be able to export all of my page HTML to PDF, which includes these morris.js charts. I am using iTextSharp for PDF export, but it does not recognize SVG elements.
SVG is not supported by iText 5.
SVG support is under development for iText 7. It will not be backported to iText 5.
Meanwhile you can use Batik to convert SVG to PNG, and then put the PNG image in your PDF. Awkward, I know, but it's your best option for now.
I want to perform OCR on png and pdf files.I am able to get Tesseract 3.0.2 .net wrapper work for png files but I can't find any class in it for PDf files.So, does it work for the pdf files.If not then please let me know any other open source library for scanning pdfs. My requirement is scanning diagrams in a pdf for specific circles, and creating hyperlinks for those circles.
No, it doesn't. You'll have to extract the images from the pdf first. This can be done using pdfimages pdfimages.exe -j your.pdf or gs as suggested by Zakk Diaz.
I need to create a software which will create print previews of the documents of following formats: the MS Office documents (.doc(x), .ppt(x), .xls(x)), images, .txt files and PDF files. I have made a working prototype using XPS files. So basically I do the following: I convert the office files to .xps using Office Automation and then I render the .xps documents to images. I simply create XPS files from images and .txt by adding text or an image to FlowDocument, then rendering it. But I have found out that there is no way to convert PDF to XPS fast (A document which has 600 pages takes more than 2 minutes to convert and this is totally not suitable). So I am stuck at this point. It seems that I should start over again, using the different file format. Should I rewrite my program using PDF, for example, or is there any other way to accomplish my task? And if I should use PDF, could you, please, suggest me a good PDF C# library to render previews of pages as fast as possible? I tried using Websupergoo's ABCPdf, but it is too slow, because it does not allow me to render the previews to System.Windows.Media.Imaging.BitmapSource, only System.Drawing.Bitmap, so I have to convert Bitmap to BitmapSource and it takes up a lot of time.
Thanks in advance.
Use Ghostscipt to convert PDF to images. Though, I don't know why you wouldn't just use the PDF. I have used GhostScript for a number of PDF/Image manipulation tasks.
http://www.wibit.net/blog/integrating_ghostscript_c
Ghostscript will output any PDF to images to the settings you specify. I think you can use it as a DLL or as a commandline process.
I am using acrobat sdk to convert a image pdf to searchable text pdf, Can anyone help me out, I am stucked, i need to check whether a file is already OCR or not??
you can try this sample to apply OCR to images in a pdf document