rgb3toppm(1) General Commands Manual rgb3toppm(1)NAME
rgb3toppm - combine three portable graymaps into one portable pixmap
rgb3toppm redpgmfile greenpgmfile bluepgmfile
Reads three portable graymaps as input. Combines them and produces one portable pixmap as output.
SEE ALSO ppmtorgb3(1), pgmtoppm(1), ppmtopgm(1), ppm(5), pgm(5)AUTHOR
Copyright (C) 1991 by Jef Poskanzer.
15 February 1990 rgb3toppm(1)
Check Out this Related Man Page
ppmtopgm(1) General Commands Manual ppmtopgm(1)NAME
ppmtopgm - convert a portable pixmap into a portable graymap
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.
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)
I am a newbie. I'd like to get key lines from a big txt file by Reg Exp, The file is nearly 22MB.
GREP or SED?which may be the best choice,more efficient way?
or any other best practise?
Thank you in advance.
Ever:) (5 Replies)
Hi running aix 6.1
I need to confirm that this cron entry is set properly.
I need it set for every 5 min.
0,5,10,15,20,25,30,35,40,45,50,55 * * * * /path/to/script.sh
it does not appear that it is running every 5 min but it did in the beginning. (4 Replies)
Hey :) I am trying to understand the command goto.
I have some questions regarding the goto manual.
1.What does the underlined part mean?
I'm not allowed to type goto in the shell? But if goto is written into a file everything is okay?
2.So if a part of my file looks like this
goto... (8 Replies)
We just found out that the installation of DB/2 on a HACMP- (PowerHA-) Cluster running v7.1.3 is not possible due to a bug in HACMP. DB/2-version was 10.5 but this seems to apply to 10.1 too (and probably other versions as well).
The error message the DB/2-installer issues is something like:
... (2 Replies)
Dear all, will be thankful if you can help on sort command.
My data looks like (tab separated; number of columns 2317; N of rows ~200000):
a b c d V10 V2 V8 V4 V7
xx z y 1000 1 2 0 2 0
tr v m 1001 0 0 1 2 2
rg s ... (7 Replies)
I am trying to build python(2.7.9) 64 bit from source on solaris10. Using the below to compile
./configure CFLAGS=-m64 LDFLAGS=-m64
But getting errors like below while executing make
make: Fatal error: Command failed for target `libinstall'
64-bit amd64... (9 Replies)
so i have a txt file containing word like "one two three four plus four five six".
I want to save every word in the file into a variable, and then use that variable to generate real numbers and apply the arithmetic value on them.
example: the txt files becomes 123 + 456 and... (10 Replies)
Hello. I am looking for all the necessary packages required to be able to compile libXft.
I tried to compile libXft-126.96.36.199$ and the error message was:
checking for XRENDER... checking for XRENDER... checking for X... no
checking X11/extensions/Xrender.h usability... no
checking... (1 Reply)
Working on a new cybersecurity, dystopian world series and made a short 2 min teaser today.
Cyber Dystopia (720 HD)
If anyone has any ideas for the story, please write out some story lines in the comments and join the production team! (1 Reply)
Hello my friends,
I've come across the weirdest of glitches.
I'm running a simple weather monitor (just temperature) on a Raspbeery Pi 3B (Raspbian Linux 4.14.98-v7+). It has a 3G modem that sends out simple packets to my server at home.
On june 5th I lost remote access to the device.... (1 Reply)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
I'm new to bash script and I'm learning the basics by writing some scripts.
Recently a friend of mine asked me if I could try to write a script to him to automate a couple of processes that uses JSON RPCs.
I'll try to explain in few words the workflow just to contextualize the problem.... (48 Replies)
I was thankful in getting help from this post that allowed me to connect to multiple severs at once using here documents to gather data into variables. But I've discovered that the same bash command that works on my RHEL 7 servers do not work on RHEL 6? What's strange about my... (4 Replies)