.DJV File Extension

.DJV File Extension

DjVu Image

Developer LizardTech
Popularity

Average rating 3.4 / 5. Vote count: 14

Category Raster Image Files
Format .DJV
Cross Platform Update Soon

What is an DJV file?

The .DJV file extension represents DjVu image files, which are often used for scanned documents, books, and high-resolution images. DjVu (pronounced “déjà vu”) is a file format designed to store scanned documents, particularly those that contain a combination of text, line drawings, and photographs. It provides a high level of compression while maintaining good image quality, making it an efficient format for distributing digital documents over the internet.

More Information.

DjVu was initially created to address the challenges of digitizing and distributing large volumes of scanned documents. Traditional formats such as TIFF and PDF were often inadequate due to their large file sizes and slow rendering times. DjVu’s innovative compression techniques, which include separating text and background layers and using different compression algorithms for each, allowed for much smaller file sizes and quicker rendering.

Origin Of This File.

The DjVu file format was developed by AT&T Labs in 1996. The name “DjVu” is derived from the French phrase “déjà vu,” which means “already seen.” The format was designed to overcome the limitations of existing document image formats like TIFF and PDF by providing better compression ratios and faster access times.

File Structure Technical Specification.

A DjVu file typically consists of the following components:

  • JB2: Used for compressing bitonal (black-and-white) images.
  • IW44: A wavelet-based compression algorithm for continuous-tone images.
  • Background/Foreground Separation: Text is separated from the background to allow for different compression techniques.
  • Text Layer: Embedded OCR (Optical Character Recognition) text to make the document searchable.

How to Convert the File?

Windows

  1. Calibre:
    • Install Calibre from its official website.
    • Open Calibre, click on “Add books” to import the DjVu file.
    • Select the DjVu file, click on “Convert books,” choose the output format (e.g., PDF), and click “OK.”
  2. WinDjView:
    • Download and install WinDjView from its official website.
    • Open the DjVu file in WinDjView.
    • Go to “File” > “Export As” and choose the desired output format (e.g., PDF, PNG).
  3. Online Converters:
    • Use online services like Convertio or Zamzar.
    • Upload the DjVu file, select the output format, and download the converted file.

Linux

  1. DjVuLibre:
    • Install DjVuLibre using your package manager (e.g., sudo apt-get install djvulibre-bin for Ubuntu).
    • Use the ddjvu command to convert DjVu to PDF: ddjvu -format=pdf input.djvu output.pdf.
  2. Evince:
    • Install Evince using your package manager (e.g., sudo apt-get install evince).
    • Open the DjVu file in Evince.
    • Go to “File” > “Print” and select “Print to File” to save it as a PDF.
  3. Calibre:
    • Install Calibre from its official website.
    • Follow the same steps as in Windows to convert the DjVu file.

Mac

  1. MacDjView:
    • Download and install MacDjView from its official website.
    • Open the DjVu file in MacDjView.
    • Go to “File” > “Export As” and choose the desired output format.
  2. DjView:
    • Install DjView from its official website.
    • Open the DjVu file, go to “File” > “Export As,” and select the output format.
  3. Calibre:
    • Install Calibre from its official website.
    • Follow the same steps as in Windows to convert the DjVu file.

Android

  1. EBookDroid:
    • Install EBookDroid from the Google Play Store.
    • Open the DjVu file in EBookDroid.
    • Use the app’s sharing or export feature to convert the file to a different format, if supported.
  2. Online Converters:
    • Use mobile browsers to access online converters like Convertio or Zamzar.
    • Upload the DjVu file, select the output format, and download the converted file.

iOS

  1. Documents by Readdle:
    • Install Documents by Readdle from the App Store.
    • Open the DjVu file in the app.
    • Use the app’s sharing or export feature to convert the file to a different format, if supported.
  2. DjVu Reader:
    • Install DjVu Reader from the App Store.
    • Open the DjVu file and use the app’s export feature to convert the file to another format, if supported.
  3. Online Converters:
    • Use mobile browsers to access online converters like Convertio or Zamzar.
    • Upload the DjVu file, select the output format, and download the converted file.

Others

  1. Web-Based Converters:
    • Use web-based converters like Convertio or Zamzar.
    • These services work on any platform with a web browser.
    • Upload the DjVu file, select the output format, and download the converted file.
  2. Cross-Platform Tools:
    • Calibre: Available on Windows, Linux, and Mac. Install Calibre and follow the conversion steps.
    • SumatraPDF: Available on Windows but can be run on Linux and Mac using compatibility layers like Wine.

Advantages And Disadvantages.

Advantages:

  • High Compression: DjVu files are significantly smaller than other scanned document formats, making them ideal for web distribution.
  • Fast Rendering: The format allows for fast viewing and navigation, even on low-bandwidth connections.
  • Layered Structure: Separating text from images improves readability and searchability.
  • Open Source: The DjVu format is open, with many tools and libraries available for manipulation and viewing.

Disadvantages:

  • Limited Adoption: While efficient, the format is not as widely adopted as PDF, which can lead to compatibility issues.
  • Quality Loss: High compression can sometimes result in a loss of image quality, particularly in detailed images.
  • Viewer Requirement: Special software is needed to view DjVu files, which may not be pre-installed on many systems.

How to Open DJV?

Open In Windows

  • WinDjView: A popular DjVu viewer for Windows.
  • SumatraPDF: A lightweight PDF, eBook, and DjVu reader.
  • IrfanView: With the appropriate plugin, IrfanView can open DjVu files.

Open In Linux

  • Evince: A document viewer for the GNOME desktop environment.
  • DjView4: A cross-platform DjVu viewer.
  • Okular: A universal document viewer developed by KDE.

Open In MAC

  • DjView: A cross-platform DjVu viewer.
  • MacDjView: A simple DjVu viewer for Mac.
  • Evince: Also available for Mac.

Open In Android

  • EBookDroid: A highly customizable document viewer supporting DjVu.
  • DjVu Reader: A straightforward DjVu reader for Android devices.

Open In IOS

  • DjVu Reader: Available on the App Store for iPhone and iPad.
  • Documents by Readdle: A versatile document manager that supports DjVu files.

Open in Others

  • Web Browsers: Some browsers support DjVu files through plugins or extensions, like DjVu.js for viewing DjVu files directly in the browser.
  • Cross-Platform Tools: Tools like SumatraPDF and Calibre are available on multiple platforms and can handle DjVu files.

Verified by allfileinfo.com

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