Baslinux mailing list

[Neo Sze Wee <neoszewee AT gmx.net>]

On Sat, May 31, 2003 at 02:02:12PM -0400, keesan2 AT cyberspace.org wrote:
> On Fri, 30 May 2003 jamtat AT mailsnare.net wrote:
> 
> > >
> > > Have you had time to check out pdfimage or pdftops?
> > >
> > Check them out how?  pdftoimage, I would imagine, makes a scanned pdf
> > image into a .gif or .jpeg or something.  Is that right? 
> 
> 
> Most pdf files contain both text and images.  pdftotext extracts the text
> part.  pdfimage extracts the images as a series of pbm or pnm (monochrome
> or color) images with sequentially numbered file names.  You will need to
> read the documentation for the correct command.  I have used only the DOS
> version.
> 
> There is something out for Windows now called a 'pdf machine' which I
> think means people scan pages and convert them to pdf instead of gif, in
> which case a pdf file might consist of nothing but full-page images.  The
> DOS pdfimage program had problems with this format sometimes.
> 
> Yes, you will need some image viewer that views pbm and pnm images.  I
> don't have one installed, and I don't even have space left to install zgv
> along with these three pdf convertors.  I need to put together another
> computer.  Does zgv view these formats?
> 

Yes.


<$PWD:!>#  zgv --help
| zgv 5.6 - copyright (C) 1993-2001 Russell Marks.
| 
| usage: zgv [options] [dir | file ...]
| 
|    -A --auto-animate
|                       automatically animate multiple-image GIFs.
|                       This greatly limits how such images can be viewed,
|                       but can be useful for slideshows.
|       --auto-mode-fit
|                       automatically switch modes to suit image size.
|    -p --avoid-single-progress
|                       don't show progress indicator when loading a
|                       single file from the command-line.
|       --black-background
|                       try to use a black background in the viewer when
|                       displaying an 8-bit image.
|    -b --block-cursor  use a blocky outline cursor, which is rather
|                       unsubtle but more obvious.
|       --brightness adjust_val
|                       specify how much to add to colour values to
|                       change brightness (default 0).
|       --centre                (or --center)
|                       (normally enabled, use --centre=off to disable)
|                       if *disabled*, don't centre images onscreen.
|       --clear-screen-on-exit
|                       clear text console's contents on exit.
|       --col-black "r g b"
|                       set colour used for `black' (text) in selector;
|                       RGB values should be in the range 0-63 for this
|                       and the other colour settings below, and the
|                       three numbers should be quoted as shown.
|       --col-dark "r g b"
|                       set colour used for lowlights in selector.
|       --col-light "r g b"
|                       set colour used for highlights in selector.
|       --col-medium "r g b"
|                       set colour used for background in selector.
|       --col-tagged "r g b"
|                       set colour used for tagged files in selector.
|       --contrast multiplier
|                       specify how much to multiply colour values by
|                       to change contrast (default 1.0).
|       --delete-single-prompt
|                       (normally enabled, use --delete-single-prompt=off to
|                       disable) if *disabled*, don't prompt for confirmation
|                       when deleting a single file (with the Delete key).
|       --delete-tagged-prompt
|                       (normally enabled, use --delete-tagged-prompt=off to
|                       disable) if *disabled*, don't prompt for confirmation
|                       when deleting tagged files (with `D').
|       --dither-16col-fast
|                       (normally enabled, use --dither-16col-fast=off to
|                       disable) if *disabled*, use (much) slower but
|                       more accurate dithering in the viewer's 16-colour
|                       mode.
|       --fake-cols     (normally enabled, use --fake-cols=off to disable)
|                       if *disabled*, don't fake extra greyscales and
|                       colour depth in 8-bit modes.
|       --force-fs-16col
|                       force the use of 16-colour mode for the selector.
|    -j --force-viewer-8bit
|                       force all images to be loaded as 8-bit. Normally
|                       zgv will load 24-bit images (e.g. colour JPEGs)
|                       as 24-bit if you have any modes capable of
|                       displaying it in 15, 16, 24, or 32-bit colour.
|       --fs-16col-colour-thumbnails    (or --fs-16col-color-thumbnails)
|                       if using 16-colour mode for the selector,
|                       show dithered colour thumbnails (rather than mono).
|       --fs-ignore-old-pos
|                       don't recall previous cursor position in a
|                       directory when returning to it later.
|       --fs-magic      use a slow, but precise (magic-number-based)
|                       method to identify picture files to list
|                       in the selector.
|       --fs-perfect-cols
|                       don't tweak thumbnail colours to make the rest of
|                       the selector look right.
|       --fs-slow-thumbnail-update
|                       show current cursor position at all times when
|                       updating thumbnails, which in most cases will
|                       make it markedly slower.
|       --fs-small-text
|                       use smaller text than usual in the selector.
|       --fs-start-mode modespec
|                       specify initial mode for the selector; the `modespec'
|                       should be the width, height, and depth in
|                       quotes, e.g. "640 480 8". Note that the depth
|                       specified is actually ignored (and forced to 8).
|    -t --fs-thick-text
|                       use bold text in selector, which may be useful
|                       for those with mildly impaired vision (especially
|                       when combined with the `-b' option).
|    -G --gamma val     set gamma adjustment. The default is 1.0, i.e.
|                       no adjustment. (See info file or man page for
|                       details, and a discussion of gamma issues.)
|       --gnulitically-correct
|                       GNU has POSIXLY_CORRECT for compatibility with
|                       silly POSIX misfeatures, and zgv has...
|    -i --ignore-errors
|                       when loading a single file from the command-line,
|                       ignore (some) errors.
|       --jpeg-index-style style
|                       specify how to read JPEGs when creating
|                       thumbnails (default 2):
|                         1 = the quickest (but this sometimes generates
|                             rather fuzzy/blocky thumbnails);
|                         2 = fairly cautious, but still quite fast;
|                         3 = an extremely cautious and slow method.
|    -J --jpeg-speed type
|                       set JPEG speed/quality tradeoff (default 2):
|                         1 = floating-point - slow but accurate;
|                         2 = slow integer - faster but not as accurate;
|                         3 = fast integer - fastest but least accurate.
|    -h --help          give this usage help.
|       --line-text     use old line-based text.
|    -M --mouse         enable mouse support; this uses svgalib's mouse
|                       configuration, see the libvga.config(5) man page
|                       for details.
|       --mouse-scale scale
|                       set the ratio of `mouse pixels' to onscreen pixels.
|                       In effect, sets the mouse speed. Defaults to 16.
|       --pcd-res resnum
|                       set Photo-CD resolution to use, if support was
|                       enabled at compile-time. (See info file/man page
|                       for further details.)
|    -g --pgm-truecol   treat PGM files as 24-bit, ensuring that
|                       256 separate greyscales can be shown if a 24-bit
|                       mode is available.
|       --reverse-bc-order
|                       apply brightness modification before contrast.
|       --revert-orient (normally enabled, use --revert-orient=off to disable)
|                       if *disabled*, orientation (flip/mirror/rotate) state
|                       is retained between pictures.
|       --revert-scale  (normally enabled, use --revert-scale=off to disable)
|                       if *disabled*, scaling is retained between pictures.
|       --scrollbar     show a scrollbar below the selector.
|       --show-xvpics-dir
|                       show any `.xvpics' directory, so you can view
|                       thumbnails there even if the pictures they
|                       represent have been deleted.
|    -T --show-tagged   show names of tagged files on exit (they're listed
|                       to stdout).
|    -S --slideshow-delay delay
|                       set the delay (in seconds) for which one picture
|                       in a slideshow is shown before reading the next.
|                       The default is 4.
|    -l --slideshow-loop
|                       loop in slideshows `forever' (until you exit).
|    -R --slideshow-randomise   (or --slideshow-randomize)
|                       randomise order of pictures in slideshows.
|       --viewer-16col-colour   (or --viewer-16col-color)
|                       use a dithered colour display (rather than mono)
|                       in the viewer's 16-colour mode.
|    -m --viewer-start-mode modespec
|                       specify initial mode for the viewer; the `modespec'
|                       should be the width, height, and depth in
|                       quotes, e.g. "640 480 8".
|       --visual        (normally enabled, use --visual=off to disable)
|                       if *disabled*, no thumbnails are shown.
|    -k --vkludge       smooth image when zoom mode is reducing a
|                       picture to fit the screen, and when in virtual
|                       modes.
|       --version       report version number.
|       --xzgv-keys     remap keys to (mostly) match those used in xzgv.
|    -z --zoom          fit picture to the full screen size, whatever the
|                       picture's actual size.
|       --zoom-reduce-only
|                       when zooming, only *reduce* pictures to fit; i.e.
|                       make big pictures viewable all-at-once while leaving
|                       small pictures intact.
| 
|       dir             start zgv on a certain directory.
|       file ...        view (only) the file(s) specified. If more than
|                       one file is given, the files are viewed as a
|                       slideshow.
| 
| All options are processed after any ~/.zgvrc or /etc/zgv.conf file.
| Most long options (minus the `--') can used in either file with e.g.
| `zoom on'. (But be sure to omit any quoting mentioned above in config
| files.)
| 
| On/off settings (such as zoom) are enabled by e.g. `-z' or `--zoom';
| however, the long-option form `--option=off' can be used to disable
| them (needed when they are enabled by default - revert-scale, for
| example - or to override them being enabled in a config file).
| 
| (This syntax actually lets you both disable *and* enable options,
| using (for the arg after `=') on/off, y/n, yes/no, or 1/0.)