How to scan documents with déjà vu. Djvu - what is this format, how to open it and what programs to use for reading files in deja vu on a computer or android. Reading a book or watching a slide show

Free program for creating and reading files in DjVu format. You can download the program at http://www.lizardtech.com.

The DjVu format appeared quite a long time ago, but has gained popularity recently. The format was created by AT&T and sold to LizardTech, which created several programs to work with this format. The DjVu Solo program was the first trial program for creating files in the DjVu format, after which LizardTech created the commercial program Document Express, the professional sixth version of which was released not so long ago. The DjVu Solo 3.1 program is currently not being developed further. Many attribute the slow spread of the DjVu format to the fact that the Document Express Pro 6 program is now asking for incredible amounts of money. At the same time, the DjVu Solo 3.1 program allows you to create files in the DjVu format, although it does not understand Russian texts, that is, it does not recognize the text and does not separate it into a separate layer, treating it as image elements. But it doesn't matter much.

So, what is the DjVu format and what is it for?

Imagine the following example: you have a rare technical book, and you want to convert it into digital form, in other words, scan it. There are no problems with scanning. But further difficulties may arise. What are the scanned files? These are the most common images, usually in JPG format. What is any technical book: text, drawings, formulas. We won’t talk about tables, since they are closest to the text. The programs ABBYY Fine Reader 10.0, ABBYY Scan To Office 2.0, CuneiForm 12 Master and many others are designed for text recognition. These programs can also recognize drawings and import them into a text document. But here there are several “buts”. Firstly, the text is recognized, but it is usually imported into a text document in the form of a font other than the one in which it was typed in the document, but the one selected for import. If there are many fonts in a book, they may lose their original parameters. Secondly, many characters are still recognized with large errors or not recognized at all. This mainly applies to the Greek font, superscripts and subscripts, etc. But we warned at the very beginning that we were going to digitize a technical book, that is, a book usually stuffed with various formulas. And thirdly, you will most likely have to say goodbye to the decorative design of the book when recognizing text. All this will have to be restored in a text document after manual recognition, that is, for a long time. To do this, you need to have exactly the same fonts on your PC, waste your time and, as a result, still not get the design style that was in the book.

That is, we are convinced that recognizing a complex technical document most likely leads to a dead end. No matter how powerful recognition programs are now, they still have limitations.

So we're back to the original scanned files, which are stored as images. Another way is to create a book from these images. But images take up a huge amount of disk space. Store a book of 800 pages, 2 pages in one file - 400 files. If each file takes up approximately 200 KB, then the total size will be approximately 80 MB.

The DjVu format allows you to bypass all the shortcomings of both text recognition and creating a book from images. This format occupies an intermediate position between text recognition and image storage. Scanned pages are stored as images, but take up approximately 10 times less space than the most cost-effective image formats. For example: we scanned a book as a spread (2 pages). In JPG format, the file size was approximately 200 KB. When converting this image to DjVu format, the volume became more than 10 times smaller: from 16 to 21 KB. However, the quality of the pages did not deteriorate. The pages will appear as they appeared on the scanned page, that is, with shadows at the fold. In addition, the DjVu Solo 3.1 program allows you to arrange a book page by page. That is, the book becomes a single whole and there is no need to remember which pages are stored in which file.

Note: speaking of shadows on the double page spread. Research in recent years has shown that it is easier for a person to read e-books that imitate a real book.

DjVu Solo 3.1 program splits the image into three layers: foreground, background and black and white mask. The mask stores the text first. This is done as follows: characters of the same font are sorted, and only one of each character is remembered, and in place of all the other same characters, the addresses of their location on the book page are remembered. Thus, much less memory is needed than to save the entire text. If the text uses several fonts, then memorization is performed for each font separately. Illustrations and paper texture are preserved in the background. Therefore, those characters that are not recognized as characters are remembered in the background. The volume of a multi-page book is many times smaller than the sum of the volumes of individual pages if they were stored on separate pages. This effect is achieved by storing only one collection of characters from each font.

All layers are located on top of each other and visually when viewing a book page it is impossible to distinguish them from each other.

Well, if we have convinced you that you vitally need this format, and with it you will become a great specialist, then forward to knowledge.

Getting the first page of a book

After starting the program, the program working window opens (Fig. 156).

Rice. 156. Working window of the DjVu Solo 3.1 program

The working window opens empty, since page images still need to be obtained. You can obtain the original images, not necessarily using this program, but scan them in any program that allows scanning. If scanning was performed previously, then you must click on the button Open(Open) () and select the starting graphic file. The DjVu Solo 3.1 program understands several popular graphic formats: JPG, GIF, TIFF, BMP, PICT, PNM.

If you want to scan source pages from the DjVu Solo 3.1 program, then click on the button Scan(Scan) (). After this, the standard scanning program is launched, that is, DjVu Solo 3.1 does not have a built-in driver for the scanner. After scanning is completed, the image is loaded into the working window of the DjVu Solo 3.1 program. Please note that an image is being loaded that has yet to be converted to DjVu format.

Note: if you have several scanners connected to your PC, then run the command File → Select Source(File → Select Source) and select one of the scanners.

To convert the received (or opened) image to DjVu format, you need to run the command File → Encode As DjVu(File → Convert to DjVu). Save the resulting file.

Getting the next pages of a book

To scan the next image, press the button again Scan(Scan) (). Each scanned image is placed in a separate window. Therefore, after each scan, you need to convert the resulting images into DjVu format, save and close the window with such an image after saving. As soon as you try to save the resulting image, the program will offer to convert this image to DjVu format when saving. That is, you should still have an open book with pages converted to DjVu. To continue the book, execute one of the commands in the menu section Edit(Edit):

• Append Page(s)- insert pages at the end of the book. It doesn't matter which page is selected in the preview window;
• Insert Page (s) Before- insert pages before the selected page in the preview panel;
• Insert Page(s) After- insert pages after the selected page in the preview panel.

Note: The preview panel is located on the left side of the working window. The pages are presented in the form of icons. To disable or re-enable the preview panel, run the command Thumbnails→ Show Thumbnails(Icons → Show icons). The panel with pages is visible if the command Show Thumbnails checkbox is checked. To change the boundaries between the preview pane and the open page, place your mouse on the vertical line dividing the panes so that a double-headed arrow appears. Click on the mouse and, without releasing it, drag left or right.

After executing any of these commands, a window opens Open, in which you need to select one or more files in DjVu format and click on the button Open. Once individual pages are included in the book, the original DjVu files are no longer needed and can be deleted. If several pages are connected to a book at once, then the source files for them are selected using the Ctrl key: select the first file, then press the Ctrl key and, without releasing it, click on all the opened files in turn. Release the Ctrl key.

If some pages were included in the set by mistake, they can be removed from the book. Select such pages in the list of pages and right-click on them. From the context menu that appears, run the command Delete Page(s).

Navigation through book pages

To navigate through the pages of the book, you can use the toolbar buttons or menu section commands Navigate(Navigation). The menu section provides the entire list of navigation commands (key combinations are indicated in brackets) (button on the toolbar):

Book page viewing modes

To view pages by layer in the toolbar and menu section View → Display(View → Display) the following modes are available:

If some layers are missing, then this layer will appear empty on the page. For example, in mode Color Mode shadows are visible on the facing pages. If you do not need them, then turn on the mode Black &White Mode and the shadow on the spread will not be visible.

Reading a book or watching a slide show

Before reading a book, click on the page area (on the right side of the working window). If you do not do this, the command to read the book may not be available. After this the command is executed Slide Show→ Begin slideshow(Slideshow → Start Slideshow) or press the F 2 key on your PC keyboard. Book pages are viewed on the entire monitor screen. Page turning is done with mouse clicks. After flipping through the last page of the book, the program returns to the working program window. To force a return to the working program window, press the Esc key on your PC keyboard. Book pages are viewed in the mode that was previously selected in the working window before reading started. However, the viewing mode can be changed while reading a book. To do this, you need to call the context menu of the pages and place the mouse on the section Display(Display) and select the desired reading mode or page scale ( Zoom(Scale)). In the context menu in reading mode, you can also change the viewing scale.

Hyperlinks

We will start not with the hyperlinks themselves, but thematically adjacent to them - these are highlighted areas. Highlighted areas are areas that need to be highlighted in some way so that the reader pays attention to them. The highlighting is done with a color, yellow by default. There is a button to create the backlight. Highlight Area(Highlight Area) () on the toolbar. Create a rectangular area on the page to which you want to highlight some fragment of the page. There is no need to create this exact rectangular area, since it is much easier to adjust it later using the tool Edit mode(Edit mode) (). Once you have finished creating the highlighted area, a window will immediately open. Highlight Area Properties(Highlight Area Properties). We will look at the parameters of this window a little later, but for now just click on the button OK. Select a tool Edit mode(Edit mode) (). After this, place the mouse pointer on one of the corner or middle markers located around the perimeter of the highlighted area. After this, a bidirectional arrow should appear (Fig. 157). Click and drag the mouse in the desired direction. To delete a highlight area, right-click on it and from the context menu that appears, execute the command HyperLinks→ Delete(Hyperlinks → Delete). To edit the parameters of a highlight area, call the context menu of this area and run the command HyperLinks→ Edit(Hyperlinks → Edit).

Hyperlinks allow you to create additional information in a book without increasing the size of the file in which the book is stored. There are three tools for creating hyperlinks: Rectangular Hyperlink(Rectangular hyperlink) (), Oval Hyperlink(Oval hyperlink) (), Polygon Hyperlink(Polygonal hyperlink) (). Rectangular and oval areas are created diagonally from one corner to the other. A polygonal hyperlink area is created by clicking the corners of the polygon. Completing creation is done by double clicking the mouse. After creating the hyperlink, a window opens Hyperlink Properties(Hyperlink Properties), whose parameters we are skipping for now. Click on the button OK.

After creating a hyperlink, its borders can be easily adjusted using the tool Edit mode(Edit mode) (). Viewing hyperlinks can only be done in book preview mode. To do this, click on the button Preview mode(Preview mode) (). When you hover your mouse over the hyperlink area, a tooltip appears (Fig. 158). To finish viewing the hint, click the mouse, otherwise the hint will remain on the screen, not only on the page on which the hyperlink area is located, but on any page in the book. Until the mouse click is completed, that is, until the previous hyperlink is closed, you may have problems viewing the next link.

Setting options for hyperlinks and highlight areas

After creating hyperlinks or highlight areas, a window opens Hyperlink Properties(Hyperlink Properties) or Highlight Area Properties(Highlight Area Properties). Until now, we have not configured the parameters in these windows, but immediately clicked on the button OK. Let's look at these parameters in the table (Table 4).

Table 4. Settings for hyperlinks and highlight areas

In a multiline field Description Specify the tooltip text that will appear when you hover over a hyperlink area or highlight area.

Printing a document

To print a document in DjVu format, do one of the following:

Run the command File→ Print(File → Print) from the main menu;

After performing any of these actions, a window will open Seal(Fig. 159).

On the list Name printer is selected. Please note that a printer can be not only a real printer, but also a virtual one. You can use a virtual printer to convert a file from DjVu format to PDF format. For example, you may need to convert a file from DjVu format to Microsoft Word format. You cannot convert directly, but you can first convert the file to PDF format, and then convert from PDF format to Microsoft Word format. For example, this can be done using the ABBYY Transformer 3.0 program.

On the panel Print range specify the pages to print. To start printing, click on the button OK.

Hello, dear readers of the blog site. You've probably come across scanned images on the Internet. books in Djvu format(their files have the same extension).

Usually, it is not fiction that is distributed online in this way, but books containing drawings, graphs, formulas and other things that are quite difficult to convert into digital format using text recognition programs.

At first, I thought that this strange djvu() format was an ordinary set of raster images (photos) that were the result of scanning a book. But in this case the file size would be very large, and we do not observe this.

What is a file with such a mysterious extension and how can you open it to start reading the information contained in “déjà vu”, and what programs are best to use. I will try to answer all these questions in this article.

What is a Djvu file?

It turns out that djvu was developed about fifteen years ago and is a very successful mixture of test and graphic formats. In principle, when digitizing books, two scenarios are possible:

1. Perform text recognition on a scanned page and save it using compression algorithms, which allows you to get a very small weight of the final file. The downside is that you lose images, backgrounds, marginal notes, dog-ears, and other things that may be important in some cases. But it will be possible to conduct a full search using recognized texts.
2. You can save scanned texts as pictures, for which these or tiff are suitable. However, the weight of even one scanned page will be prohibitively high if we want to maintain quality. Well, it will be impossible to search through texts.

Djvu combines the advantages of the methods described above, while having virtually no disadvantages. Format Deja vu can be classified as text-graphic, which in itself already sounds unusual, but it promises a lot of dividends. Judge for yourself:

1. The original scanned image is compressed in Djvu ten times more tightly than it would be using JPEG, and its quality remains virtually unchanged. At the same time, jpeg will definitely blur the text, graphics, and everything that is possible, and our hero will leave everything in its original form.
2. An A4 sheet, scanned and converted to déjà vu, will weigh around 50 kilobytes (read about that) if the source had color graphics (or background), and around 10 kilobytes if it was black and white. Brilliant, and this is taking into account the fact that the scanning was carried out in a high resolution of 300 DPI. The same file saved in tiff format (without loss of quality) would weigh several hundred times more.
3. The Djvu file contains a text layer through which you can conduct a full search, and if you wish, you can leave only it (removing the color mask and background information), which will further reduce the size.

All this is achieved thanks to a rather original approach. I could be wrong, but in my opinion it is as follows:

1. Separate the page text and its background. The algorithm monitors many factors and, with the right settings, can even rip out the text component from the cover of a magazine, where words can also be used as a background.
2. The text is saved in a one-bit version (black and white) and is compressed quite tightly.
3. The background is saved separately and compressed a little less efficiently.
4. Information about the color of the text and illustrations used in the book is also compressed, but using a different algorithm.
5. As I already mentioned, the Djvu format provides a separate text field, thanks to which you can search through scanned books.

But the questions of creation and principles of data formation in déjà vu files are of interest to us insofar as, and it will be much more interesting to find out how they can be open and read Djvu.

Naturally, special reading programs (readers) are used for this purpose, which are available for both computers and mobile devices based on Android or iOS (ipad, iPhone). It’s convenient, after all, on the way home or to work to increase your level of education by reading a smart book on your mobile phone.

How to open Djvu - reading programs on a computer

There are several programs that are focused on working only with déjà vu files, but there are a number of universal solutions that allow you to read books in almost any form. There are also Djvu editors that allow you to edit or even create your own masterpieces.

Among Deja Vu readers intended for computers, it is worth highlighting the following readers:

It fully supports the Russian language and even managed to be captured by the “great and terrible” Yandex, forcing you almost by force and default search in all your browsers:



In general, they make it possible to abandon all this wealth (including), but not everyone pays attention to this when installing the program. Of course, with the same one it all looks even more intrusive, but the leading Runet search engine has also already filled all the free programs with its add-ons to the point of “don’t play around.”



As I already mentioned, Djvu can have a text layer embedded, so when reading books containing it, you can search by words and phrases.

On the left, WinDjView has a navigator with page thumbnails, and at the top there is a toolbar where you can open a new file, change the scale and type of display of pages (endless feed or imitation of a book spread), and also rotate them, if necessary, at an angle multiple of 90 degrees.

What’s noteworthy is that this deja vu reader opens new books in new tabs, which allows you to work with several materials at once in one program window. There is also the ability to make bookmarks and leave comments (from the right-click context menu). You can use a screen magnifier from the toolbar and full-screen viewing mode (in this case, you can turn pages with a simple mouse click).

If you select “File” - “Settings” from the WinDjView program menu, then on the second tab you can set the inversion of colors (for example, in order to read white text on a black background), as well as adjust the brightness, contrast or gamma for better perception of the document in Djvu format.



At the beginning of the article, I mentioned that in déjà vu, the scanned document is broken down into a black and white text component, a background, and foreground color information. So, in WinDjView all this can be clearly seen by selecting “view” - “mode” from the menu.

The latest current version dates back to 2005 (version 2.0.0.26) and its compatibility with modern operating systems is not guaranteed, although it still works on my Windows Vista, although not as quickly as its modern counterpart described just above. It does not require installation and works directly from the folder where you unpacked the archive with the program.



During installation, you need to check the box that you will not use this reader for commercial purposes, so as not to pay for the program.



Well, STDU Viewer will also ask you which file extensions you would like to associate it with, except for deja vu.



In principle, there is nothing so global in this reader that would not be in WinDjView, but... Firstly, it’s captivating a huge number of formats, which can be opened and read using this program.

Secondly, a very convenient and thoughtful interface.



Almost all of the reader’s functionality is displayed in the form of toolbars located around the entire perimeter of the program window. The place where thumbnails of the pages of the book you are reading are usually displayed, has as many as six tabs located at the bottom.

Not all of them apply to Djvu, but still. The same bookmarks, which can be designed in the form of a tree, can easily replace the missing navigation in your reference book or reference book.

The brightness and contrast settings are also displayed as an icon in the lower right corner, where there are also buttons for switching the document display mode.

Thirdly, there are some nice functional delights that will help during daily work with STDU Viewer:




Well, fourthly, there is a huge number of settings that can be made in STDU Viewer so that this reader is fully suited to your habits and needs.

For example, you can customize (File - Program Settings) even the appearance of the tabs, which, of course, is a trifle, but quite pleasant:

Djvu readers for Android and iOS (iPad and iPhone)

For some reason, I mostly manage to read books on the road, but there are always a lot of other, more important and interesting things to do. In this regard, I was faced with the task of downloading some suitable déjà vu reader for my beloved iPad, received as a gift from Profit Partner, but also in addition to everything - for an Android phone.

At the same time, I try to try all the free options for programs and applications before coming to the conclusion that I have no other option but to part with my hard-earned money. Actually, the main candidates for the place of Djvu are e-readers for iOS on the Internet. DjVU Book Reader.

Everything seems to be fine, both reviews and screenshots, but they are asking for it, albeit a small, but still a sum of money (169 rubles). I thought that this software was a bit of a mess, so I entered the word Djvu in the search bar in the Apple Store and asked to filter only free applications.

After testing to open various files in déjà vu format and assessing ease of use and functionality, a clear leader emerged among free programs for iPad - KyBook.

The software is unique, in my opinion, because while it is free, it fully supports EPUB, FB2, PDF, DJVU, CBR, CBZ and audiobooks in MP3, M4A, M4B formats.

When reading, the pages turn beautifully (the animation can be customized), there are a lot of settings and functionality, such as creating bookmarks, leaving notes, searching through the contents of the book, etc. things that are accessible from the top toolbar.

The KyBook reader has unexpectedly many settings:

Including there is a separate group of settings for this reader for PDF and DJVU formats:

In the library of this reader, you can sort books, create shelves for them, move files between them, rename them, and do everything that is usually required from such programs.

In addition, it is possible to use your existing applications for working with cloud storage systems such as , or Google Drive.

True, by providing access to your files in Dropbox and other clouds, KyBook warns you that it can even change them, which I personally don’t really like.

So I Djvu files are thrown into the Dropbox folder on the computer (via Wi-Fi), after which I open the application of the same name on the iPad and add them to my favorites, so that they are not later pulled over the mobile Internet, which is not always fast and also limited.

It seems to me that it will be safer this way.

Now it’s time to move on to the question of how to open Djvu on Android. The Internet told me that the best options are two free applications, which I still use today, because I didn’t have any particular complaints about their work, but just in case I left both of them in case some kind of twisted deja vu file opens one of them can not.

So, I present to you deja vu readers for Android:

Good luck to you! See you soon on the pages of the blog site

You might be interested

How to convert a Word document (doc) to a PDF file, as well as convert it to FB2
Dropbox - how to use cloud data storage, as well as working with the Dropbox program on a computer and mobile
FastStone Image Viewer is a photo viewer program that helps reduce (compress) the size and weight of photos
Windows clipboard and saving its history in Clipdiary
PhpMyAdmin - what is it, where can you download it, how to install, configure and use it
Clip2net - how to take screenshots and post them online for free OneDrive - how to use Microsoft storage, remote access and other features of the former SkyDrive
Where can you download Photoshop for free - how to get and activate PhotoShop CS2 for free from the official Adobe website
FileZilla - where to download for free and how to learn to use the popular FTP client Filezilla
How to take a screenshot using Print Screen and the Snagit screen capture program, its settings and capabilities

Hi all! If you often download e-books and manuals on the Internet, then you have probably already come across such an e-book format as djvu. As a rule, many people immediately have the question of how to open djvu. It would seem that a regular PDF file viewer should be suitable for these purposes, but not everything is so simple. To view déjà vu files, you need special programs that can work with this format. In most cases, such e-books contain graphs, formulas and drawings that are very difficult to convert to another format for editing. I would like to note that this format was developed quite a long time ago, about 15 years ago, and managed to gain great popularity. E-books in the deja vu format contain both graphic images and text and are very light in weight.

Advantages of the Djvu format.

Before we figure out how to open djvu, let's take a little look at the advantages of this file format. As a rule, the most important advantage is that the files are very light in weight, while the quality remains high.

What we get:

1. An image scanned into the Djvu format is compressed 10 times more than the popular . And the most important advantage is that the scanned document will be of impeccable quality without any blurring or loss;
2. Saved in déjà vu format, the scanned color document will weigh approximately 50 KB. And if the paper medium contained only text and a black and white image, then its electronic version will weigh approximately 10 KB. If you scan the same document and save it in another format, for example, Jpeg or tiff, then the weight of the electronic document will be tens or even hundreds of times greater;
3. Unlike, in a book in Djvu format it is possible to conduct a full search, thanks to a special text layer. Moreover, if the book contains some kind of background, you can remove it if desired.

As you can see, this e-book format has many advantages, but this was more informational information, since now our task is a little different.

How to open djvu on a computer.

There are not many programs that can work with Djvu files, but there are also universal solutions that can open files of almost any e-book. There are also editor programs that allow you to make changes to déjà vu files, as well as create your own books.

WinDjView

Many users have this program in their arsenal, as it has proven itself only on the positive side.

You can download the program from the official website of the developer - ru.windjvu.com

The program has a Russian interface. By the way, when installing WinDjView, the Yandex search engine offers to install its elements, as well as . Here you can refuse such an intrusive offer by unchecking the appropriate boxes.

The main program window has a menu bar and a toolbar. It provides functions such as:

The program can work with several e-books at once, opening each of them in a new tab. WinDjView allows you to read a document in full screen mode, and you can only use the mouse to turn pages. If there is very small text on the pages of a book, you can use a screen magnifier.

In the program settings in the “Display” tab, the user can easily correct the colors of the image to suit his vision.

Here you can enable color inversion. This way you can read white text on a black background.

DjVu Reader

Another, quite old program for reading déjà vu files. By the way, the program has not been supported by developers for quite a long time, namely since 2005, but still remains in demand among many users. Therefore, if you are still wondering how to open djvu, then DjVu Reader will certainly help you.

You can download the program on the official website of the developer - djvureader.org

DjVu Reader does not require installation on your computer and is launched from the downloaded folder with files. Therefore, if you need to quickly open an e-book, then download this reader and use it.

Note! Since the program has not been supported by developers for quite a long time, it may not work entirely correctly on new versions of the Windows operating system.

STDU Viewer

This program is the most universal solution than the readers described above. Since it can work not only with Djvu files, but also with PDF, EPub, FB2 and many other e-book formats. This makes the program an incomparable leader among other similar solutions, since you do not have to keep several different utilities on your computer.

You can download the program on the official website of the developer: www.stduviewer.ru

Note! To use the program for free, during installation you must check the box “I will not use STDU Viewer for commercial purposes.”

Also, when installing the reader, you can specify what types of files it will work with. To do this, check the boxes in the “Associate extensions” window.

STDU Viewer is liked by many users for its well-thought-out interface, which allows you to comfortably work with e-books. In the working window of the program there are many toolbars, with the help of which the user can easily customize the program to suit his needs.

The program has the following settings:

• Selecting the document display mode;
• Adjusting brightness and contrast;
• Quick search by document;
• Copying text if there is a special layer in the document;
• Text highlighting;
• Restoring an open document in case of an emergency termination of the program;
• Setting up page division (horizontally or vertically);

The program also has a number of settings, which can be accessed by going to the “File” - “Program Settings” menu.

As you can see, STDU Viewer is a powerful tool for working with djvu files, with a huge number of settings; having this reader in your arsenal, you will not have any questions about how to open djvu.

Let's summarize.

Today we looked at three wonderful programs that can work with e-books in Djvu format. I advise all e-book lovers to have at least one of the described programs in their arsenal, since if you have them, you will no longer have questions about how to open djvu.

Many users are faced with the need to open files in the DjVu format on their computer. The DjVu format, along with the PDF format, is the most popular format for storing scanned documents.

The name of the DjVu format comes from the French word déjà vu - “already seen”. This format saves scanned electronic books and magazines, mainly of an encyclopedic, educational, scientific and technical nature, which contain a lot of graphics: images, pictures, diagrams, etc. Users scan books with a large number of images and then save them in electronic form in a DjVu file format.

The DjVu format has gained popularity, partly due to the fact that a DjVu file weighs much less than a similar PDF file. This is especially true for mobile devices and is also useful for computers. Very large files are difficult to open even with specialized programs - viewers for files of this type.

Therefore, in many cases, it is optimal to save documents and pictures in the DjVu graphic format. A document in DjVu format is several times smaller in size than a similar file saved in PDF format.

How to open DjVu? In this article I will tell you how to open a DjVu file on a computer using the Windows operating system. To do this, we need a program that opens DjVu files.

Which program can open files with the DjVu extension? To open files in the djvu format, you can use specialized programs for opening files in the djvu format, or applications that support opening several types of text format files, including déjà vu.

In this article I will talk about 5 programs. Two programs: WinDjView and DjVu Reader, are specially created for viewing the djvu format, and three others: STDU Viewer, Sumatra PDF, Universal Viewer Pro have support for several formats, including DjVu.