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..TH hpcdtoppm 1 " 16 March 1993" ..IX hpcdtoppm ..SH NAME hpcdtoppm v0.4 - convert a Photo-CD file into a portable pixmap ..SH SYNOPSIS ..B hpcdtoppm [options] pcd-file [ppm-file] ..SH DESCRIPTION Decodes a Photo-CD Image file or Overview file. Image files you can find on the Photo-CD in photo_cd/images, they are named as "imgnnnn.pcd", where nnnn is a 4-digit-number. The Overview file is at photo_cd/overview.pcd . If there is no output filename given, output will be printed to stdout. hpcdtoppm stands for "Hadmut's pcdtoppm" to make it distinguishable in case someone else is building the same thing and calling it pcdtoppm. ..IX GIF ..SH OPTIONS ..TP ..B -x Overskip Mode. Works on Base/16, Base/4, Base and 4Base. In Photo-CD images the luma channel is stored in full resolution, the two chroma channels are stored in half resolution only and have to be interpolated. In the Overskip Mode the chroma 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 to generate the difference image of these two images. Call ppmhist for this difference or show it with xv (push the HistEq button in the color editor). ..TP ..B -s Apply simple sharpness-operator on the Luma-channel. ..TP ..B -d Do not show the complete image, but only the decompressed difference. It works only on the 4Base and the 16Base resolution. It does not have any deeper sense, but it was simple to implement and it shows what causes different sizes of image files. ..TP ..B -i Give some information from the fileheader to stderr. It works only for Image files. (It is not working correctly, just printing some strings.) ..TP ..B -m Show the phases of decoding to stderr. ..TP ..B -crop Try to cut off the black frame which is sometimes scanned at the image borders. The image size shrinks. ..TP ..B -pos Print the file relative start position of the data for the current resolution. ..TP ..B -rep Try to jump over reading errors in Huffman code. ..TP ..B -n Don't rotate the image. ..TP ..B -r Rotate the picture clockwise for portraits. ..TP ..B -l Rotate the picture counter-clockwise for portraits. ..TP ..B -a Try to find out the image orientation byself. This doesn't work for overview files yet. It is very experimental and depends on one byte. Please tell me if it doesn't work. ..TP ..B -vert Vertical flip. ..TP ..B -hori Horizontal flip. ..TP ..B -ppm Write rgb image in ppm-format. ..TP ..B -pgm Write grayscale image in pgm-format. ..TP ..B -ycc Write ycc image in ppm-format. ..TP ..B -ps Write rgb image in postscript. ..TP ..B -eps Write rgb image in encapsulated postscript. ..TP ..B -psg Write grayscale image in postscript. ..TP ..B -epsg Write grayscale image in encapsulated postscript. ..TP ..B -pl f Set left position of Postscript image to f. ..TP ..B -pb f Set bottom position of Postscript image to f. ..TP ..B -pw f Set width of Postscript image to f. ..TP ..B -ph f Set height of Postscript image to f. ..TP ..B -c0 Don't correct the image. ..TP ..B -c- Do a correction (darker). Hardware and taste dependend. ..TP ..B -c+ Do a correction (brighter). Hardware and taste dependend. ..TP ..B -1 | -Base/16 | -128x192 Extract the Base/16 size picture (size 128x192 pixels). Note that you can only give one size option. ..TP ..B -2 | -Base/4 | -256x384 Extract the Base/4 size picture. ..TP ..B -3 | -Base | -512x768 Extract the Base size picture. ..TP ..B -4 | -4Base | -1024x1536 Extract the 4Base size picture. ..TP ..B -5 | -16Base | -2048x3072 Extract the 16Base size picture. ..TP ..B -0 | -Overview | -O Extract all pictures from an Overview file. A ppmfilename must be given. If the given name is "foo", the files are named "foonnnn", where nnnn is a 4-digit number. Since they are stored in Base/16 format, they are extracted in this format. ..TP ..B -C d Extract all pictures from an Overview file. A ppmfilename must be given. If the given name is "foo", the files are named "foonnnn", where nnnn is a 4-digit number. Since they are stored in Base/16 format, they are extracted in this format. ..PP ..SH BUGS hpcdtoppm seems to ignore the read protection. :-) The informations i have are quite vague and this program was developed by starring at the hex-dumps and the famous trial-and-error-method. If anything doesn't work, please send me a report and perhaps you could try to find out, why it doesn't work. ..SH "SEE ALSO" ppm(5), ppmquant(1), ppmtopgm(1), ppmhist(1), pnmarith(1), ppmtorgb3(1), xv(1) ..SH AUTHOR Copyright (c) 1992, 1993 by Hadmut Danisch (danisch@ira.uka.de). 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 documentation. It is not allowed to sell this software in any way. This software is not public domain.
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