DJVU is a file format that is designed mainly to store all the scanned documents, particularly those that contain a combination of photographs, indexed color images, line drawings, and text. It makes use of technologies like arithmetic coding, progressive loading, the image layer separation of images/backgrounds and text, lossy compression for bitonal (monochrome) images. This is useful for readable and high-quality images that are to be stored within a minimum space, and later they have been made available over the Internet.
Moreover, the DJVU file format has been promoted as a substitute to the PDF files, allowing users to have smaller size files for the scanned documents.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .DJVU file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .DJVU file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .DJVU file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.