djvutxt - Extract the hidden text from DjVu documents.
djvutxt [options] inputdjvufile
[outputtxtfile]
Program
djvutxt decodes the hidden text layer of a DjVu document
inputdjvufile and prints it into file
outputtxtfile or on the
standard output. The hidden text layer is usually generated with the help of
an optical character recognition software.
Without options
-detail and
-escape, this program simply outputs
the UTF-8 text. Option
-detail cause the output of S-expressions
describing the text and its location. Option
-escape uses C-style
escape sequences to represent nonprintable non-ASCII characters.
-
--page=pagespec
- Specify which pages should be processed. When this option
is not specified, the text of all pages of the documents is concatenated
into the output file. The page specification pagespec contains one
or more comma-separated page ranges. A page range is either a page number,
or two page numbers separated by a dash. For instance, specification
1-10 outputs pages 1 to 10, and specification 1,3,99999-4
outputs pages 1 and 3, followed by all the document pages in reverse order
up to page 4.
-
--detail=keyword
- This options causes djvutxt to output S-expressions
specifying the position of the text in the page. See the manual page
djvused(1) for a description of the output format. Argument
keyword specifies the maximum level of detail for which text
location is reported. The recognized values are: page,
column, region, para, line, word, and
char. All other values are interpreted as char.
- --escape
- Output escape sequences of the form
"ooo" for all non ASCII or non printable UTF-8
characters and for the backslash character.
Use program
djvused(1) for more control over the text layer.
This program was initially written by Andrei Erofeev
<
[email protected]> and was then improved Bill Riemers
<
[email protected]> and many others. It was then rewritten to use
the ddjvuapi by Leon Bottou <
[email protected]>.
djvu(1),
djvused(1)