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Converting DJVU to PDF with Text and Image Preservation in Ubuntu

Ubuntu 8

In this article, we will explore various methods to convert DJVU files to PDF format while preserving the text and image layers in Ubuntu. DJVU is a file format that is primarily used for storing scanned documents, especially those containing a combination of text, drawings, images, and photographs. However, PDF is a more universally accepted format, and hence the need for conversion.

Quick Answer

Converting DJVU to PDF with text and image preservation in Ubuntu is possible using various methods such as DJView, Evince, command line tools, and online converters. However, none of these methods guarantee perfect preservation of both text and image layers. It may be necessary to experiment with different methods to achieve the desired results.

Method 1: Using DJView

DJView is a standalone viewer for DJVU files. It also has an export feature that allows you to convert DJVU files to PDF.

  1. Installation: Open the Synaptic Package Manager and search for “DJview4”. Install the package.
  2. Usage: Launch DJView from the Applications – Graphics – DJView4 menu. Open your .djvu document, then navigate to Menu – Export As: PDF.

Please note that this method may not retrieve the images in high quality.

Method 2: Using Evince

Evince is a document viewer for multiple document formats, including DJVU and PDF.

  1. Usage: Open the DJVU file in Evince. Select “Print” and choose the “Print to File” option. Change the file extension from .ps to .pdf and click “Print”.

This method is straightforward but may not preserve the text layer as desired.

Method 3: Using Command Line Tools

The command line tools ddjvu and tiff2pdf can be used to convert DJVU to PDF.

  1. Installation: Open the Synaptic Package Manager and search for “djvulibre-bin libdjvulibre21 okular-extra-backends evince libevdocument3 libevview3”. Install these packages. Then, open a terminal and run the command: sudo apt-get install libtiff-tools. This will install the necessary TIFF tools.
  2. Usage: Navigate to the directory where the DJVU file is located. Right-click and select “Open In Terminal”. In the terminal, run the following commands:
    • ddjvu -format=tiff file_name.djvu file_name.tiff
    • tiff2pdf -j -o file_name.pdf file_name.tiff

The ddjvu command converts the DJVU file to TIFF format. The -format=tiff parameter specifies the output format. The tiff2pdf command then converts the TIFF file to PDF. The -j parameter compresses the file using JPEG compression, and the -o parameter specifies the output file.

This method may not preserve the text layer as desired.

Method 4: Using Online Converters

Online converters like DjVu to PDF converter can be used for conversion. However, please be aware that uploading sensitive documents to online converters may pose a security risk.

Conclusion

While there are multiple methods to convert DJVU to PDF in Ubuntu, none of them guarantees perfect preservation of text and image layers. Depending on the complexity of your DJVU file and your specific needs, you may need to experiment with different methods to achieve the desired results.

Can I convert DJVU files to PDF without losing the text and image layers?

While the methods mentioned in this article aim to preserve the text and image layers, the results may vary depending on the complexity of the DJVU file and the chosen method. It is recommended to try different methods and adjust settings as needed to achieve the desired preservation.

Are the methods mentioned in this article specific to Ubuntu or can they be used on other operating systems?

The methods mentioned in this article are specific to Ubuntu, but similar tools and software may be available for other operating systems. It is recommended to search for DJVU to PDF conversion methods compatible with your specific operating system.

Are there any limitations or drawbacks to using online converters?

Online converters can be convenient, but there are a few limitations and risks to consider. Firstly, the conversion quality may not be as reliable as using local software. Additionally, uploading sensitive documents to online converters may pose a security risk, as you are entrusting your files to a third-party service. It is recommended to exercise caution and ensure the security and privacy measures of any online converter before using it.

Can the DJVU to PDF conversion process be automated for bulk conversions?

Yes, it is possible to automate the DJVU to PDF conversion process for bulk conversions. You can use scripting or programming languages like Python to create a script that iterates through a folder of DJVU files and converts them to PDF using the desired method. This can save time and effort when dealing with a large number of files.

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