compare
mathematically and visually annotate the difference between an image and its reconstruction.
Synopsis
compare
input-file input-file [options]
output-file
add an example, a script, a trick and tips
examples
source
compare file timestamp in bash
This is because of some missing spaces. [ is a
command, so it must have spaces around it and the ]
is an special parameter to tell it where its comand line ends.
So, your test line should look like:
if [ $file1time -gt $file2time ];
source
What's the quickest distro to get up and running with?
If you're used to Ubuntu, then use Ubuntu.
Also, any distribution that's modern and up-to-date are pretty
standard in what they offer. The big thing that sets them apart
however, are the package managers. Red Hat based distros use RPM
packages and Yum-based repositories, and Debian/Ubuntu based
distros use deb packages and apt.
Personally, I prefer Debian based distros. If you have doubts,
there is a quiz you can take that will recommend the best distro
according to your needs. http://www.zegeniestudios.net/ldc/
source
File compare on ftp-server and in a folder in Linux?
You will need to use a bash script and compare file listings in
the two places. You will need to make sure that the file listings
are consistent so you can compare them.
source
Linux distributions comparison
source
How can I compare just the file contents of two zip files
zipcmp
zipcmp compares the zip archives zip1 and zip2 and checks if
they contain the same files, comparing their names,
uncompressed sizes, and CRCs. File order and compressed size
differences are ignored.
source
Which Linux is the most efficient?
gentoo is
pretty nice but it's tough to get installed.
source
Advantages of Re-Compiling of Linux Kernels: Share your Ideas
Generally, unless you need a specific option not compiled into a
kernel, and/or need a smaller kernel optimised for size (say for
an embedded system)... not much at all. Its one of those 'if you
REALLY need to ask, it probably means you don't need to do it'
things.
source
Red Hat vs. Fedora
Red Hat Enterprise Linux (RHEL) is an enterprise-class Linux
distro whose goal is long-term API/ABI stability. Fedora Linux
(Fedora) is a developer-class Linux distro whose goal is to test
and showcase new technologies. Every few years a new version of
RHEL comes out, containing stabilized forms of the technologies
previously used in Fedora.
source
How to show linux "cmp" command progress?
You can use PipeViewer for this
pv firstfile | cmp -l secondfile > output
source
Compare huge directory trees
I did this in Total Commander, using the synchronise directory
feature. 1.2TB data across two drives.
source
Which Linux is the most efficient?
gentoo is pretty nice but
it's tough to get installed.
source
Difference between folders
Use the following command:
diff -r folder1 folder2
source
Comparing files for similarities
You mught try using vimdiff or
gvimdiff. However, they too find differences raather
than similarities. I doubt an application for what you suggested
exists.
source
GNU/Linux substitute for the Windows-based TreeComp tool
Take a look at FreeFileSync.
description
Image Settings:
-authenticate value decrypt image with this password
-channel type apply option to select image channels
-colorspace type alternate image colorspace
-compose operator set image composite operator
-compress type type of pixel compression when writing
the image
-decipher filename convert cipher pixels to plain
pixels
-define format:option
define one or more image format options
-density geometry horizontal and vertical density of
the image
-depth value image depth
-encipher filename convert plain pixels to cipher
pixels
-extract geometry extract area from image
-format "string" output formatted image
characteristics
-fuzz distance colors within this distance are
considered equal
-identify identify the format and characteristics of
the image
-interlace type type of image interlacing scheme
-highlight-color color
emphasize pixel differences with this color
-limit type value pixel cache resource limit
-lowlight-color color
de-emphasize pixel differences with this color
-metric type measure differences between images with
this metric
-monitor monitor progress
-profile filename add, delete, or apply an image
profile
-quality value JPEG/MIFF/PNG compression level
-quiet suppress all warning messages
-quantize colorspace reduce colors in this colorspace
-regard-warnings pay attention to warning messages
-sampling-factor geometry
horizontal and vertical sampling factor
-seed value seed a new sequence of pseudo-random
numbers
-set attribute value set an image attribute
-size geometry width and height of image
-subimage-search search for subimage
-synchronize synchronize image to storage device
-taint declare the image as modified
-transparent-color color
transparent color
-type type image type
-verbose print detailed information about the image
-virtual-pixel method
virtual pixel access method
Miscellaneous
Options:
-debug events display copious debugging information
-help print program options
-log format format of debugging information
-list type print a list of supported option arguments
-version print version information
By default, the
image format of ’file’ is determined by its
magic number. To specify a particular image format, precede
the filename with an image format name and a colon (i.e.
ps:image) or specify the image type as the filename suffix
(i.e. image.ps). Specify ’file’ as
’-’ for standard input or output.
copyright
Copyright (C) 1999-2012 ImageMagick Studio LLC. Additional
copyrights and licenses apply to this software, see
file:///usr/share/doc/imagemagick/www/license.html or
http://www.imagemagick.org/script/license.php
overview
The compare program is a member of the ImageMagick(1)
suite of tools. Use it to mathematically and visually annotate
the difference between an image and its reconstruction.
For more information about the compare command, point your
browser to file:///usr/share/doc/imagemagick/www/compare.html or
http://www.imagemagick.org/script/compare.php.
see also
ImageMagick