pdfimages.1

这是一个做pdf阅读器的源代码文件,是大家学习阅读器资料的很好参考

.\" Copyright 1998-2007 Glyph & Cog, LLC
.TH pdfimages 1 "27 February 2007"
.SH NAME
pdfimages \- Portable Document Format (PDF) image extractor
(version 3.02)
.SH SYNOPSIS
.B pdfimages
[options]
.I PDF-file image-root
.SH DESCRIPTION
.B Pdfimages
saves images from a Portable Document Format (PDF) file as Portable
Pixmap (PPM), Portable Bitmap (PBM), or JPEG files.
.PP
Pdfimages reads the PDF file, scans one or more pages,
.IR PDF-file ,
and writes one PPM, PBM, or JPEG file for each image,
.IR image-root - nnn . xxx ,
where
.I nnn
is the image number and
.I xxx
is the image type (.ppm, .pbm, .jpg).
.PP
NB: pdfimages extracts the raw image data from the PDF file, without
performing any additional transforms.  Any rotation, clipping,
color inversion, etc. done by the PDF content stream is ignored.
.SH CONFIGURATION FILE
Pdfimages reads a configuration file at startup.  It first tries to
find the user's private config file, ~/.xpdfrc.  If that doesn't
exist, it looks for a system-wide config file, typically
/usr/local/etc/xpdfrc (but this location can be changed when pdfimages
is built).  See the
.BR xpdfrc (5)
man page for details.
.SH OPTIONS
Many of the following options can be set with configuration file
commands.  These are listed in square brackets with the description of
the corresponding command line option.
.TP
.BI \-f " number"
Specifies the first page to scan.
.TP
.BI \-l " number"
Specifies the last page to scan.
.TP
.B \-j
Normally, all images are written as PBM (for monochrome images) or PPM
(for non-monochrome images) files.  With this option, images in DCT
format are saved as JPEG files.  All non-DCT images are saved in
PBM/PPM format as usual.
.TP
.BI \-opw " password"
Specify the owner password for the PDF file.  Providing this will
bypass all security restrictions.
.TP
.BI \-upw " password"
Specify the user password for the PDF file.
.TP
.B \-q
Don't print any messages or errors.
.RB "[config file: " errQuiet ]
.TP
.B \-v
Print copyright and version information.
.TP
.B \-h
Print usage information.
.RB ( \-help
and
.B \-\-help
are equivalent.)
.SH EXIT CODES
The Xpdf tools use the following exit codes:
.TP
0
No error.
.TP
1
Error opening a PDF file.
.TP
2
Error opening an output file.
.TP
3
Error related to PDF permissions.
.TP
99
Other error.
.SH AUTHOR
The pdfimages software and documentation are copyright 1998-2007 Glyph
& Cog, LLC.
.SH "SEE ALSO"
.BR xpdf (1),
.BR pdftops (1),
.BR pdftotext (1),
.BR pdfinfo (1),
.BR pdffonts (1),
.BR pdftoppm (1),
.BR xpdfrc (5)
.br
.B http://www.foolabs.com/xpdf/