DjVu Imager-Qt

This is a port of DjVu Imager 2.9 by Alexey Kryukov (monday2000) from MFC to Qt 5.x. The main idea was to make it more cross-platform. Specifically - make a native version for Linux.

DjVu Imager - is a program which creates the grey or color illustrations in a DjVu-book. It is based on the combination of the background glueing and mask coloring methods.

The program accepts the background subscans from the specially prepared subscans pairs, converts each background subscan to a ready DjVu-pic and inserts them into a target DjVu-book (e.g. a multipage black-and-white DjVu file).

The subscans pairs are suggested to be created in the ScanKromsator or ScanTailor programs - although it can be done in any graphical editor.

DjVu Imager is licensed under "GPL 2 and later" and has the open sourcecodes.

DjVu Imager utilizes several console tools from DjVuLibre project.

The workflow outline:

ScanKromsator 5.92 or ScanTailor -> subscans pairs -> background subscan -> DjVu Imager

Usage:

1. Prepare the subscans pairs in ScanKromsator 5.92 or ScanTailor.

2. Launch DjVu Imager.

3. Open the background subscans either by choosing Open file(s) or Open folder.

4. In the column # the program automatically forms the numbers of the loaded files (based on their names). Each such number signifies the DjVu-page number where this loaded graphical file is going to be glued on (as an illuatration). If necessary you can manually edit any such number (by double-clicking on it).

5. If you wish choose the encoding parameters: BSF or Background quality.

6. Using the switches All files / Current file, you can set the individual encoding parameters for any file in the list.

7. Press the Convert button to launch encoding of a group of the DjVu-pics.

8. Choose the target DjVu-book by pressing Source. This will automatically fill the output DjVu path (can be changed by Dest)

9. Press the Insert in DjVu button. The ready DjVu-pics will be automaticaly incorporated in the corresponding places of a copy of the target DjVu-book (Not that the target DjVu-book itself remains unchainged).

10. In the folder where a target DjVu-book pathname points will be created a copy of the target DjVu-book with the inserted DjVu-pics. It is a result of this program work.

Details:

The DjVu Imager - is just a GUI controlling the console executables taken from DjVuLibre package:

Utilities in use:

• c44-fi (former fi_c44) - the modified (with FreeImage support) console encoder с44 (for the DjVu-pics creation). This port uses its crossplatform adaptation. The project and sources are here

• djvmcvt - the console utility for packing-unpacking the multypage DjVu-files to the separate pages.

• djvused - for getting a DjVu-book structure, pages number information and for changing dpi in djvu files for some cases.

• djvuextract - the console utility for disassembling single-page DjVu-files into the constituents (chunks).

• djvumake - the console utility for assembling single-page DjVu-files from the constituents (chunks).

• djvm - the console utility which collects the ready DjVu-pics into a temporary multypage DjVu-file (to show it later when View button is pressed).

The Qt port uses up-to-date non-modified version of DjVuLibre tools, except for c44-fi.

For more details please check help files.

Authors: Alexey Kryukov monday2000.

GUI creation: monday2000.

Port to Qt: Alexander Trufanov