djvu2hocr (1)

djvu2hocr [option...] djvu-file djvu2hocr {--version | --help | -h}

djvu2hocr converts hidden text from a DjVu file to the \m[blue]hOCR\m[]\s-2\u[1]\d\s+2 format.

Input selection options

-p, --pages=page-range

Specifies pages to covert. page-range is a comma-separated list of sub-ranges. Each sub-range is either a single page (e.g. 17) or a contiguous range of pages (e.g. 37-42). Pages are numbered from 1.

The default is to convert all pages.

Text segmentation options

--word-segmentation=simple

Use the same word segmentation as found in the DjVu file.

This is the default.

--word-segmentation=uax29

Use the \m[blue]Unicode Text Segmentation\m[]\s-2\u[2]\d\s+2 algorithm to break lines into words, possibly fixing word segmentation found in the DjVu file.

HTML output options

--title=title

Specifies the document title.

The default is “DjVu hidden text layer”.

--css=style

Add the specfied CSS style to the document.

For example, --css='.ocrx_line { display: block; }' can be used to visually preserve line breaks.

Other options

--version

Output version information and exit.

-h, --help

Display help and exit.

djvu2hocr uses a custom extension to hOCR to retain characters which cannot be directly represented in an HTML/XML document. For example, control character BEL (^G, U+0007), is converted into the following HTML chunk: <span class="djvu_char" title="#x07"> </span>

Please report bugs at: \m[blue]https://bitbucket.org/jwilk/ocrodjvu/issues\m[]

djvu(1), hocr2djvused(1), ocrodjvu(1)

1.

hOCR

\m[blue]https://docs.google.com/View?docid=dfxcv4vc_67g844kf\m[]

2.

Unicode Text Segmentation

\m[blue]http://unicode.org/reports/tr29/\m[]