pgmhist(1) General Commands Manual pgmhist(1)NAME
pgmhist - print a histogram of the values in a portable graymap
SYNOPSIS
pgmhist [pgmfile]
DESCRIPTION
Reads a portable graymap as input. Prints a histogram of the gray values.
SEE ALSO pgmnorm(1), pgm(5), ppmhist(1)AUTHOR
Copyright (C) 1989 by Jef Poskanzer.
28 February 1989 pgmhist(1)
Check Out this Related Man Page
ppmhist(1) General Commands Manual ppmhist(1)NAME
ppmhist - print a histogram of a portable pixmap
SYNOPSIS
ppmhist [-hexcolor] [-noheader] [-map] [-nomap] [-sort={frequency,rgb}] [ppmfile]
DESCRIPTION
Reads a PPM image as input. Generates a histogram of the colors in the image, i.e. a list of all the colors and how many pixels of each
color are in the image.
OPTIONS
-sort={frequency,rgb}
The -sort option determines the order in which the colors are listed in the output. frequency means to list them in order of how
pixels in the input image have the color, with the most represented colors first. rgb means to sort them first by the intensity of
the red component of the color, the of the green, then of the blue, with the least intense first.
The default is frequency.
-hexcolor
Print the color components in hexadecimal. Default is decimal.
-noheader
Do not print the column headings.
-map Generates a PPM file of the colormap for the image, with the color histogram as comments.
-nomap Generates the histogram for human reading. This is the default.
SEE ALSO ppm(5), pgmhist(1), ppmtomap(1), pnmhistmap(1), ppmchange(1)AUTHOR
Copyright (C) 1989 by Jef Poskanzer.
17 September 2000 ppmhist(1)
Split large xml into mutiple files and with header and footer in file
tried below
it splits unevenly and also i need help in adding header and footer
command :
csplit -s -k -f my_XML_split.xml extrfile.xml "/<Document>/" {1}
sample xml
<?xml version="1.0" encoding="UTF-8"?><Recipient>... (36 Replies)
Here are instructions to clear the data cache for four browsers, Safari, Chrome, Firefox, Opera. In these examples I'm using MacOS Mojave, but it should be similar for any OS.
You can use these instructions to to clear and reload the cache if you have any issues with the Vue.js UserCP (current... (1 Reply)
Yesterday someone asked me to install TeamViewer and share my Mac screen with them while on a conference call.
I shut down my Mac before sleeping and woke up to some major problem with my 12-core CPU in hyperdrive, and the system activity monitor showed my Mac kernel_task was at 1,200% and the... (30 Replies)
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)
Hi,
I am attempting to extract the /lib/ paths using sed but it does not appear to work.
./copy_chroot_lib.sh ls echo | sed s#*\(/lib\).*#\1#g
linux-vdso.so.1 (0x00007fff77df1000)
libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x00007f28190ac000)
... (8 Replies)
hi,
I am searching for a native tool on MacOS that can increase the resolution of a group of image files whose aspect ratios (file width versus height) vary widely. There are numerous files so I don't wish to do this manually. Someone suggested the sips command with the resampling option but... (5 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
echo "Ready?"
sleep 2
... (10 Replies)
Hi all...
Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default.
Many tricky terminal escape codes are not catered for so I had to create workarounds.
One thing I searched for was this:
Passing perl variable to shell command
AND, @Neo this was... (15 Replies)
Python 3.8.0rc1 released today, 1st October 2019...
Just tried it out testing my AMIGA Python 1.4.0 code inside it and all are working, I can now test to the latest Python incarnation now.
Subjective opinion is that is seems seriously quick on my OSX 10.14.6, latest Mojave update.
Python... (0 Replies)
Hi Guys,
I wrote a collection of bash functions years ago and now need to use them again but
I'm getting some error messages when eval tries to expand the variables names.
I recollect that I used the shopt command to set one of the options but I can't quite
remember the command that I... (8 Replies)
I'm trying to complete a bash script to capture if an external webcam is active in a video conference session. Some users will switch the camera to the built-in MAC camera. When this happens I want to trigger a set of events.
Things tried: reviewed the console.app to look for patterns on when... (6 Replies)