graphicsmagick | Light ruby wrapper for the GraphicsMagick CLI | Computer Vision library
kandi X-RAY | graphicsmagick Summary
kandi X-RAY | graphicsmagick Summary
This gem is deprecated and no longer maintained. MiniMagick's "Metal" tools are just as fast now, and MiniMagick has gained support for composite and other tools.
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Top functions reviewed by kandi - BETA
- Run the command .
- Write the image to the image .
- Parses the given file and returns it if it exists .
- Write the output to the image .
- Add an option to the command .
- Convert options to string
- Initialize the file
- Captures an option .
- Gets the current user instance
- Run the command
graphicsmagick Key Features
graphicsmagick Examples and Code Snippets
Community Discussions
Trending Discussions on graphicsmagick
QUESTION
I use graphicsmagick to add text to photos; but I'm having problems selecting the proper color for my text.
With graphicsmagick I can use a command such as this
...ANSWER
Answered 2022-Mar-31 at 01:27You can use -compose Difference
to overlay your desired text:
Original:
Then create a text gif.:
convert -background transparent -fill yellow label:Rose label_white.gif
Then compose them together using difference
:
composite -compose Difference -gravity North label_white.gif rose: compose_diff.gif
You can find more compositing info here.
QUESTION
I've read in the http://www.graphicsmagick.org/GraphicsMagick.html#details-snaps that it can produce several screenshots in a row, eventually with a desired pause time inbetween. However it seems that either I don't understand how to use it or it can't even do several screenshots with 1 second delay. The command I tried is: gm import -snaps 10 -pause 1 -window root ./"screenshot-$(date +%d_%m_%Y-%H:%M:%S).png"
But this above command other than waiting 10 seconds and producing 1 screenshot with the initial screen it does not do what I read it should.
So, can gm import do several screenshots with a delay ? if so can it do more than 1 screenshot in a second ?
...ANSWER
Answered 2022-Feb-18 at 11:53Try authorizing the command with the "loop" utility
QUESTION
Is it possible to crop equally sized tiles using GraphicsMagick, similar to ImageMagick's crop "@" modifier?
...ANSWER
Answered 2022-Jan-10 at 07:10You can maybe let bash do the work for you instead:
QUESTION
I'm trying to get GraphicsMagick to work on a heroku-20 stack, but am running into issues.
All the buildpacks I could find either were not working on the 20 stack, or if they did, they didn't include freetype support.
My "best try" was using
https://github.com/bogini/heroku-buildpack-graphicsmagick
https://github.com/heroku/heroku-buildpack-apt
to get at least the gm
command to work, however, when trying to apply some text on an image, i run into this error:
ANSWER
Answered 2021-Sep-24 at 07:18I faced the same problem. And finally, I solved the problem and now the gm library is working perfectly.
First, you should make your Heroku stack be: Heroku-18
by run this in terminal
QUESTION
We are using ImageMagick for resizing/thumbnailing JPGs to a specific size. The source file is loaded via HTTP. It's working as expected, but from time to time some images are partially broken.
We already tried different software like GraphicsMagick or VIPS, but the problem is still there. It also only seems to happen if there are parallel processes. So the whole script is locked via sempahores, but it also does not help
We found multiple similar problems, but all without any solution: https://legacy.imagemagick.org/discourse-server/viewtopic.php?t=22506
We also wonder, why it is the same behaviour in all these softwares. We also tried different PHP versions. It seems to happen more often on source images with a huge dimension/filesize.
Any idea what to do here?
...ANSWER
Answered 2021-Jul-26 at 11:02I would guess the source image has been truncated for some reason. Perhaps something timed out during the download?
libvips is normally permissive, meaning that it'll try to give you something, even if the input is damaged. You can make it strict with the fail
flag (ie. fail on the first warning).
For example:
QUESTION
I have a docker image successfully built on my mac. I am running this image by typing docker run -p 8000:8000 . Django server is up and ready to accept requests. but when I request to given URL via postman I am getting an error: socket hangs up. Here is my docker file.
...ANSWER
Answered 2021-Jul-29 at 10:29Django's runserver
command listens on 127.0.0.1 (the loopback interface) by default, since it's meant for development, not production.
In order for something to be -p
ublishable from a Docker container to the outside world, it needs to listen on 0.0.0.0
, i.e. all interfaces.
Add that to your runserver
invocation...
QUESTION
I'm trying to run python scripts in Miniconda/Anaconda on WSL 2 Ubuntu 20.04 LTS.
I've created an environment with Python 3.7.10 and I got an error message when I try to import packages every time. The message is:
...ANSWER
Answered 2021-Jul-28 at 13:16First off, you should go through a python tutorial. You can start with https://docs.python.org/3/tutorial/index.html.
You want to run import
in a python shell or a python script. Right now, you are running it in a bash terminal, and bash doesn't know what import
means.
QUESTION
I hope, someone could help me to figure out how to use Chocolatey to install various software in the GitHub Actions pipeline. The issue is obviously with the PATH environment variable. Here is the part of a YAML file where I install ImageMagick, then make a simple call to display its version as a proof of concept, but the executable is not found although the respective folder is in PATH already:
...ANSWER
Answered 2021-Jun-23 at 08:53It's hard to believe, but I accidentally fixed the issue. The problem was in the line which was retrieving the actual version- and image-quality-specific installation folder (see Get-ChildItem...
).
Originally, I was filtering the right installation folder with
QUESTION
I'm using Apt file in Heroku to have graphicmagic package available in Dyno for years.
Now I wanted to set up Heroku Pipeline tests, but the Heroku does not install apt packages in the build for tests at all. So tests using the graphicmagic are failing.
Is there any way to install the apt packages in the build for Heroku Pipeline tests?
Build logs are here:
Application build log (installing Apt packages at the end)
...ANSWER
Answered 2021-Apr-28 at 11:02It is autodetecting. Your Apt buildpack is not recognized:
QUESTION
I need to draw a two-dimensional grid of Squares with centered Text on them onto a (transparent) PNG file. The tiles need to have a sufficiently big resolution, so that the text does not get pixaleted to much.
For testing purposes I create a 2048x2048px 32-bit (transparency) PNG Image with 128x128px tiles like for example that one:
The problem is I need to do this with reasonable performance. All methods I have tried so far took more than 100ms to complete, while I would need this to be at a max < 10ms. Apart from that I would need the program generating these images to be Cross-Platform and support WebAssembly (but even if you have for example an idea how to do this using posix threads, etc. I would gladly take that as a starting point, too).
Net5 Implementation ...ANSWER
Answered 2021-Mar-03 at 11:54I was able to get all of the drawing (creating the grid and the text) down to 4-5ms by:
- Caching values where possible (
Random
,StringFormat
,Math.Pow
) - Using
ArrayPool
for scratch buffer - Using the
DrawString
overload accepting aStringFormat
with the following options:Alignment
andLineAlignment
for centering (in lieu of manually calculating)FormatFlags
andTrimming
options that disable things like overflow/wrapping since we are just writing small numbers (this had an impact, though negligible)
- Using a custom
Font
from theGenericMonospace
font family instead ofSystemFonts.DefaultFont
- This shaved off ~15ms
- Fiddling with various
Graphics
options, such asTextRenderingHint
andSmoothingMode
- I got varying results so you may want to fiddle some more
- An array of
Color
and theToArgb
function to create anint
representing the 4xbyte
s of the pixel's color - Using
LockBits
, (semi-)unsafe
code andSpan
to- Fill a buffer representing 1px high and
size * count
px wide (the entire image width) with theint
representing the ARGB values of the random colors - Copy that buffer
size
times (now representing an entire square in height) - Rinse/Repeat
unsafe
was required to create aSpan<>
from the locked bit'sScan0
pointer
- Fill a buffer representing 1px high and
- Finally, using GDI/native to draw the text over the graphic
I was then able to shave a little bit of time off of the actual saving process by using the Image.Save(Stream)
overload. I used a FileStream
with a custom buffer-size of 16kb (over the default 4kb) which seemed to be the sweet spot. This brought the total end-to-end time down to around 40ms (on my machine).
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