hpcdtoppm(1L)hpcdtoppm(1L)NAMEhpcdtoppm - convert a Photo-CD file into a portable bitmap
file
SYNOPSIShpcdtoppm infile [-a] [{-C|-0|-Overview|-O}] file opt]
[-c0] [-c-] [-c+] [-crop] [-d] [-dpi f] [-eps] [-epsd]
[-epsg] [-fak scale] [-hori] [-i] [-l] [-m] [-n] [-pb pos]
[-pgm] [-ph height] [-pl pos] [-pos] [-ppm] [-ps] [-psd]
[-psg] [-pw width] [-r] [-rep] [-S long short] [-s]
[-vert] [-x] [-ycc] [-1|-Base/16 |-128x192] [-2|-Base/4
|-256x384] [-3|-Base |-512x768] [-4|-4Base |-1024x1536]
[-5|-16Base |-2048x3072] [-6|-64Base |-4096x6144] [out_
file]
DESCRIPTION
This program accepts Photo-CD image or overview file data
from the specified input file, infile (or, if the resolu
tion is lower than 64Base and the file argument is speci
fied as -, from standard input), and writes either
Portable Bitmap Format or POSTSCRIPT to the specified out
put file (or to standard output if no file is specified).
On a standard Photo-CD, image files appear in
photo_cd/images, where they appear in files with names of
the form imgnnnn.pcd, where nnnn is a 4-digit-number. The
overview file appears in photo_cd/overview.pcd.
Photo-CD images are stored using as many as 6 different
resolutions:
Format Resolution
----------------
64Base 4096x6144 (ProPhotoCD only)
16Base 2048x3072
4Base 1024x1536
Base 512x768
Base/4 256x384
Base/16 128x192
The overview file employs Base/16 format.
OPTIONS
Invoking hpcdtoppm without arguments produces a list of
default values. Note that you can supply only one size
option.
-a Automatically determine image orientation (this
option is experimental, and does not work for
overview files).
{-C | -0 | -Overview | -O } file opt
Extract all images from an overview file. The
mandatory file argument is the name of a ppm file;
output files are named filennnn, where nnnn is a
4-digit number. Overview images are extracted in
their original Base/16 format. The value of opt
determines the orientation of the contact sheet
image; recognized values are:
n Do not rotate the image.
l Rotate the picture counter-clockwise
(portrait mode).
r Rotate the picture clockwise (portrait
mode).
-c0 Do not correct (brighten or darken) the image.
-c- Darken the image.
-c+ Brighten the image.
-crop Cut off the black frame which sometimes appears at
the image borders.
-d Show only the decompressed difference rather than
the complete image (applicable only to 4Base and
16Base images).
-dpi res
Set the printer resolution to res for dithered
POSTSCRIPT images.
-eps Write a RGB Encapsulated POSTSCRIPT color image.
-epsd Write a Floyd-Steinberg dithered image in Encapsu
lated POSTSCRIPT.
-epsg Write a grayscale image in Encapsulated POSTSCRIPT.
-fak scale
Set the scaling factor for dithered POSTSCRIPT
images to scale.
-hori Flip the image horizontally.
-i Send information from an image file header to stan
dard error.
-l Rotate the picture counter-clockwise (portrait
mode).
-m Write messages about the phases of decoding to
standard error.
-n Do not rotate the image.
-pb pos
Set the bottom position of the POSTSCRIPT image to
pos.
-pgm Write a pgm (grayscale) image.
-ph height
Set the height of the POSTSCRIPT image to height.
-pl pos
Set the leftmost position of the POSTSCRIPT image
to pos.
-pos Print the relative starting position of the data
for the current resolution.
-ppm Write a ppm RGB (color) image.
-ps Write a RGB POSTSCRIPT color image.
-psd Write a Floyd-Steinberg dithered image in
POSTSCRIPT.
-psg Write a POSTSCRIPT grayscale image.
-pw width
Set the width of the POSTSCRIPT image to width.
-r Rotate the picture clockwise (portrait mode).
-rep Try to jump over reading errors in the Huffman
code.
-S long short
Cut out a subrectangle with boundaries defined by
the values:
long For the longer side of the image.
short For the shorter side of the image.
where long and short take one of two forms:
a-b Cut from position a to position b.
a+b Starting at offset a, cut a length of b.
and where a and b are either integers representing
pixel locations, or floating point values over the
range [0.0 ... 1.0], representing the fraction of
the length of a side.
-s Apply a simple sharpness operator to the luminosity
channel.
-vert Flip the image vertically.
-x Overskip Mode (applicable to Base/16, Base/4, Base
and 4Base). In Photo-CD images the luminosity
channel is stored in full resolution, the two chro
maticity channels are stored in half resolution
only and have to be interpolated. In Overskip
Mode, the chromaticity channels of the next higher
resolution are taken instead of interpolating. To
see the difference, generate one ppm with and one
ppm without this flag. Use pnmarith(1L) to gener
ate the difference image of these two images. Call
ppmhist(1L) for this difference or show it with
xv(1L) (push the HistEq button in the color edi
tor).
-ycc Write the image in ppm YCC format.
-1|-Base/16|-128x192
Extract the Base/16 image.
-2 | -Base/4 | -256x384
Extract the Base/4 image.
-3 | -Base | -512x768
Extract the Base image.
-4 | -4Base | -1024x1536
Extract the 4Base image.
-5 | -16Base | -2048x3072
Extract the 16Base image.
-6 | -64Base | -4096x6144
Extract the 64Base image. This resolution can be
extracted from ProPhotoCD images only. The path of
the 64Base extension files is derived from the path
to the image file. This means that it doesn't work
on stdin an the directory structure must be the
very same as on the ProPhotoCD.
POSTSCRIPT OUTPUT
For POSTSCRIPT output (options -ps, -eps, -psg, -epsg,
-psd, -epsg) you can define both the resolution and place
ment of the image. Both size and position are specified
in points (1/72 inch).
The position of the image (where the origin is assumed to
be at the lower left corner of the page) is controlled by
the -pl and -pb options (applicable at all resolutions).
The size of color and grayscale images is changed with the
-pw and -ph options. Every image pixel is mapped onto one
POSTSCRIPT pixel.
There are three modes of control for dithered POSTSCRIPT:
Image size
(-pw and -ph)
Printer resolution
(-dpi)
Scaling factor
(-fak)
These three factors are interdependent, hence no more then
two can be specified simultaneously. Using -dpi and the
-pw/-ph options together often yields pleasing results.
Even using the default values for these options will pro
duce results differing from those obtained without use of
the options.
BUGS
The program ignores read protection.
The -i option is not working correctly.
Available information obout the Photo-CD format is vague;
this program was developed by trial-and-error after star
ing at hex-dumps. Please send bugs reports and patches to
the author.
SEE ALSOpnmarith(1L), ppm(5L), ppmhist(1L), ppmquant(1L), ppm
topgm(1L), ppmtorgb3(1L), xv(1L)VERSION
The name hpcdtoppm stands for "Hadmut's pcdtoppm," to make
it distinguishable in the event that someone else is
building a similar application and naming it pcdtoppm.
This is version 0.6.
AUTHOR
Copyright (c) 1992, 1993, 1994 by Hadmut Danisch
(danisch@ira.uka.de). This software is not public domain.
Permission to use and distribute this software and its
documentation for noncommercial use and without fee is
hereby granted, provided that the above copyright notice
appear in all copies and that both that copyright notice
and this permission notice appear in supporting documenta
tion. This software may not be sold or used for profit-
making activities.
Manual page extensively modified by R. P. C. Rodgers
(rodgers@nlm.nih.gov).
3 March 1994 hpcdtoppm(1L)
