spottopgm(1L)spottopgm(1L)NAME
spottopgm - convert SPOT satellite images to Portable Greymap format
SYNTAX
spottopgm [-1|2|3] [Firstcol Firstline Lastcol Lastline] inputfile
OPTIONS
-1|2|3 Extract the given colour from the SPOT image. The colours are infra-red, visible light and ultra-violet, although I don't know
which corresponds to which number. If the image is in colour, this will be announced on standard error. The default colour is 1.
Firstcol Firstline Lastcol Lastline
Extract the specified rectangle from the SPOT image. Most SPOT images are 3000 lines long and 3000 or more columns wide. Unfortu-
nately the SPOT format only gives the width and not the length. The width is printed on standard error. The default rectangle is
the width of the input image by 3000 lines.
DESCRIPTION
Spottopgm converts the named inputfile into Portable Greymap format, defaulting to the first color and the whole SPOT image unless speci-
fied by the options.
INSTALLATION
You must edit the source program and either define BIG_ENDIAN or LITTLE_ENDIAN, and fix the typedefs for uint32_t, uint16_t and uint8_t
appropriately.
BUGS
Currently spottopgm doesn't determine the length of the input file; this would involve two passes over the input file. It defaults to 3000
lines instead.
Spottopgm could extract a three-color image (ppm), but I didn't feel like making the program more complicated than it is now. Besides,
there is no one-to-one correspondence between red, green, blue and infra-red, visible and ultra-violet.
I've only had a limited number of SPOT images to play with, and therefore wouldn't guarantee that this will work on any other images.
AUTHOR
Warren Toomey wkt@csadfa.cs.adfa.oz.au
SEE ALSO
The rest of the Pbmplus suite.
spottopgm(1L)
Check Out this Related Man Page
CVT2PIC(9.1) CVT2PIC(9.1)
NAME
cvt2pic, dumppic, ega2pic, face2pic, gif2pic, jpg2pic, nasa2pic, pcx2pic, picopic, sgi2pic, targa2pic, tiff2pic, utah2pic, xbm2pic - con-
vert other formats to picture files
SYNOPSIS
fb/cvt2pic [ file ]
fb/dumppic input xsize ysize channels
fb/ega2pic [ file ]
fb/face2pic [ facefile ]
fb/gif2pic [ -m ] [ -s image ] [ file ]
fb/jpg2pic file
fb/nasa2pic file
fb/pcx2pic [ -r ] [ file ]
fb/picopic red green blue xsize ysize
fb/sgi2pic file
fb/targa2pic [ file ]
fb/tiff2pic file
fb/utah2pic file
fb/xbm2pic [ file ]
DESCRIPTION
Cvt2pic examines the given file (default standard input), and tries to convert it to a picfile(9.6). It can recognize TIFF, xbm, Com-
puServe GIF, Usenix facesaver, NASA, Utah rle, SGI, JPEG, pcx, and picfile(9.6) images. The actual conversion is done by calling out to
one of the programs described below. Although we have programs to decipher EGA, Targa, and raw dump images, cvt2pic cannot recognize them.
Dumppic copies input to its standard output, adding a TYPE=dump picture file header. Xsize and ysize are the width and height of the pic-
ture. Channels is the value of the output's CHAN= attribute. Face2pic reads facefile (default standard input), a file in the Usenix face-
saver format, and converts it to picfile(9.6) format, writing the result on standard output.
Picopic creates a TYPE=pico image from the files red, green and blue which must be raw (headerless) dumps in scan line order of size
xsizexysize.
Ega2pic reads an EGA `enhanced color mode' image from input and converts it to picfile(9.6) format, written on standard output.
Gif2pic reads a CompuServe GIF format picture from input (default standard input) and converts it to picfile(9.6) format, written on stan-
dard output. By default, it converts its input into a 3-channel rgb image. The -m flag causes it to output a single channel image with a
color map. GIF files may contain multiple images; the -s flag allows selection of an image other than the first.
Jpg2pic reads a JPEG-coded file in the JFIF format from input (or standard input) and converts it to picfile(9.6) format, written on stan-
dard output. It generates TYPE=dump.
Nasa2pic reads a NASA satellite image and converts it to picfile(9.6) format, written on standard output. It can decipher only images with
a single 8-bit channel. NASA images typically have copious annotations in their headers; these are mostly lost.
Sgi2pic converts SGI-format images to picfiles.
Targa2pic reads a Targa format file and converts it to picfile(9.6) format, written on standard output. It cannot convert compressed or
color-mapped files.
Tiff2pic converts TIFF images to picfiles. It cannot handle images with more than 8 bits per color component, nor images of more than 8
channels. It uses a version of Sam Leffler's TIFF library that purports to toe to TIFF 6.0.
Utah2pic reads a Utah rle (run-length encoded) image and converts it to picfile(9.6) format, written on standard output.
Pcx2pic reads a Paintbrush PCX format picture from input (or standard input) and converts it to picfile(9.6) format, written on standard
output. TYPE=dump is generated by default; the -r flag selects TYPE=runcode.
Xbm2pic reads an X window-system bitmap file from file (or standard input) and converts it to picfile(9.6) format, written on standard out-
put.
SEE ALSO
picfile(9.6)
Pic2gif contains code that is Copyright (C) 1988, 1989 by Patrick J. Naughton.
SOURCE
/sys/src/fb
BUGS
The world is awash with raster image file formats, many of which spawn new versions from time to time, possibly making these programs obso-
lete. On the other hand, we guarantee unconditionally that picfile(9.6) will never change.
CVT2PIC(9.1)