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comparison Meerwald-dir/cmp_pgm.1 @ 24:9f20bce6184e v0.7
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| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Fri, 20 Dec 2024 13:08:59 +0100 |
| parents | Meerwald/cmp_pgm.1@be303a3f5ea8 |
| children |
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| 23:71dd4b96221b | 24:9f20bce6184e |
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| 1 .\" | |
| 2 .\" cmp_pgm.1 - the *roff document processor man page source | |
| 3 .\" | |
| 4 .TH cmp_pgm 1 "98/07/08" "Watermarking, Version 1.0" | |
| 5 .SH NAME | |
| 6 cmp_pgm \- a program to create the difference image of two PGM images | |
| 7 .SH SYNOPSIS | |
| 8 .B cmp_pgm | |
| 9 [ | |
| 10 .B \-h | |
| 11 ] | |
| 12 [ | |
| 13 .BI \-m \ number | |
| 14 ] | |
| 15 [ | |
| 16 .BI \-o \ ofile | |
| 17 ] | |
| 18 .BI \-i \ ifile | |
| 19 .I file | |
| 20 .SH DESCRIPTION | |
| 21 .B cmp_pgm | |
| 22 is a program to create the difference image of two PGM (portable graymap) | |
| 23 grayscale images. To compare PPM (portable pixmap) RGB color images, use the | |
| 24 .B cmp_ppm | |
| 25 program. | |
| 26 .PP | |
| 27 If | |
| 28 .I file | |
| 29 or | |
| 30 .I ofile | |
| 31 is not specified, then standard input or standard output is | |
| 32 used. | |
| 33 .PP | |
| 34 .SH OPTIONS | |
| 35 .TP | |
| 36 .B \-h | |
| 37 Print a help message. | |
| 38 .TP | |
| 39 .BI \-i \ ifile | |
| 40 The original image. Mandatory. | |
| 41 .TP | |
| 42 .BI \-m \ number | |
| 43 Multiplication factor to magnify differences between the to | |
| 44 original and input image. | |
| 45 Default value: 16. | |
| 46 .TP | |
| 47 .BI \-o \ ofile | |
| 48 Output image file to contain the difference image in PGM format. | |
| 49 .TP | |
| 50 .I file | |
| 51 Input image that is compared against | |
| 52 .I ifile. | |
| 53 Default: standard input. | |
| 54 .SH OUTPUT | |
| 55 The difference image in PGM format is written to standard output or, | |
| 56 optionally, to | |
| 57 .I ofile. | |
| 58 .SH AUTHOR | |
| 59 Peter Meerwald. | |
| 60 Email bug reports to pmeerw@cosy.sbg.ac.at. | |
| 61 .SH AVAILABILITY | |
| 62 The most recent released version of | |
| 63 .B cmp_pgm | |
| 64 is always available | |
| 65 at http://www.cosy.sbg.ac.at/~pmeerw/Watermarking or via anonymous ftp from ftp.cosy.sbg.ac.at in the | |
| 66 directory /pub/people/pmeerw/Watermarking. | |
| 67 .SH "SEE ALSO" | |
| 68 .B cmp_ppm | |
| 69 (1) |