Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

ppmtopgm(1) [v7 man page]

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME
ppmtopgm - convert a portable pixmap into a portable graymap SYNOPSIS
ppmtopgm [ppmfile] DESCRIPTION
Reads a portable pixmap as input. Produces a portable graymap as output. The output is a "black and white" rendering of the original image, as in a black and white photograph. The quantization formula used is .299 r + .587 g + .114 b. Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any ppm program can read pgm (and pbm ) files automatically. pgmtoppm is for colorizing a pgm file. Also, see ppmtorgb3 for a different way of converting color to gray. And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate the original colors, not necessarily a way that looks like a black and white photograph. QUOTE
Cold-hearted orb that rules the night Removes the colors from our sight Red is gray, and yellow white But we decide which is right And which is a quantization error. SEE ALSO
pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5) AUTHOR
Copyright (C) 1989 by Jef Poskanzer. 10 April 2000 ppmtopgm(1)

Check Out this Related Man Page

ppmtopgm(1)                                                   General Commands Manual                                                  ppmtopgm(1)

NAME
ppmtopgm - convert a portable pixmap into a portable graymap SYNOPSIS
ppmtopgm [ppmfile] DESCRIPTION
Reads a portable pixmap as input. Produces a portable graymap as output. The output is a "black and white" rendering of the original image, as in a black and white photograph. The quantization formula used is .299 r + .587 g + .114 b. Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any ppm program can read pgm (and pbm ) files automatically. pgmtoppm is for colorizing a pgm file. Also, see ppmtorgb3 for a different way of converting color to gray. And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate the original colors, not necessarily a way that looks like a black and white photograph. QUOTE
Cold-hearted orb that rules the night Removes the colors from our sight Red is gray, and yellow white But we decide which is right And which is a quantization error. SEE ALSO
pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5) AUTHOR
Copyright (C) 1989 by Jef Poskanzer. 10 April 2000 ppmtopgm(1)
Man Page

6 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Vi *

hi all, i want read several programs with vi *pgm. Can i start to read file from for exsample pgm 10? ex. 1 2 3 4 5 6 7 8 9 10 i want start the vi *pgm HERE !!! 11 12 13 14 (3 Replies)
Discussion started by: tullo
3 Replies

2. Programming

C program Output

The output I got for this pgm is "4 4 4 4". Can any one help me to understand how I got this output. Also please suggest me some links to learn about argumnets evaluation in C. # include <stdio.h> void func(int a, int b, int c, int d) { printf("%d %d %d %d", a, b, c, d); } int... (3 Replies)
Discussion started by: arunviswanath
3 Replies

3. UNIX for Dummies Questions & Answers

Help with trap in terminal locking pgm

Hii , i would like to know how to finish the program... the pgm given below works but it doesn't satisfy the condition that it should not terminate process when yu press ctrl-D , or ctrl-Z . how to use trap command for this?? please help.... Q.Shell scrip to implement terminal locking .It... (5 Replies)
Discussion started by: anusha.n
5 Replies

4. Programming

Error while including libraries

Hi All, When i am trying to include graphics.h ,dos.h and conio.h, its giving error as follows: pgm.c:2:17: dos.h: No such file or directory pgm.c:3:22: graphics.h: No such file or directory pgm.c:4:19: conio.h: No such file or directory Whereas stdio.h, stdlib.h and time.h gets... (3 Replies)
Discussion started by: jisha
3 Replies

5. Shell Programming and Scripting

how to send config file

hi all please give me some idea about how to send xml file from one c++ pgm to other pgm. (1 Reply)
Discussion started by: shubhig15
1 Replies

6. UNIX and Linux Applications

how to send config file

hi all please give me some idea about how to send xml file from one c++ pgm to other pgm. (1 Reply)
Discussion started by: shubhig15
1 Replies