Imagemagick crop install#
Imagemagick crop serial#

identify ( '-verbose' ) # => 'Image: /var/tmp/dr.' Configuration Simply proxies to the command line and returns the output. The plugin adds an identify method to Job objects and model attachments which The format is optional (defaults to png). Generate a fractal-like plasma image with image = Dragonfly. PlainДЄ plain coloured image is generated with image = Dragonfly. You can use padding-top, padding-left, etc., as well as the standard css shortcuts for padding (it assumes unit is px).ДЄn alternative for font-family is font (see the imagemagick docs), which could be a complete filename.ДЄvailable fonts are those available on your system. Note that the text generation options are meant to resemble css as much as possible. generate ( :text, 'Hello there', 'font-size' => 30, # defaults to 12 'font-family' => 'Monaco', 'stroke-color' => '#ddd', 'color' => 'red', 'font-style' => 'italic', 'font-stretch' => 'expanded', 'font-weight' => 'bold', 'padding' => '30 20 10', 'background-color' => '#efefef', # defaults to transparent 'format' => 'gif' # defaults to png )

If you have ghostscript installed on your system, you can generate text images with image = Dragonfly. The following methods are provided image. Optionally pass imagemagick arguments image. thumb ( '40x30', 'format' => 'jpg', 'frame' => 0 ) EncodeД¬hange the encoding with image. You can optionally specify the output format or specify a single frame/page (e.g. thumb ( '40x30' )Д«elow are some examples of geometry strings for thumb: '400x300' # resize, maintain aspect ratio '400x300!' # force resize, don't maintain aspect ratio '400x' # resize width, maintain aspect ratio 'x300' # resize height, maintain aspect ratio '400x300' # resize only if the image is larger than this '50x50%' # resize width and height to 50% '400x300^' # resize width, height to minimum 400,300, maintain aspect ratio # resize so max area in pixels is 2000 '400x300#' # resize, crop if necessary to maintain aspect ratio (centre gravity) '400x300#ne' # as above, north-east gravity '400x300se' # crop, with south-east gravity '400x300+50+100' # crop from the point 50,100 with width, height 400,300 The ImageMagick plugin provides the followingвЂ¦ Processors ThumbД¬reate a thumbnail by resizing/cropping image. Or a Job object created with something like image = Dragonfly. Given a model attachment image = my_model. type f | egrep '*.jpg' | parallel mogrify -resize 50% ДЇor more information about the mogrify command and examples of usage, refer to this link.ImageMagick functionality is added by configuring with the plugin Dragonfly. Try this one-line script to resize all your JPEG images to half their original size: cd ~/Pictures find. Or copy your originals to a new location before you mogrify them. If you want to keep the original image, use the convert command (also part of ImageMagick) to write to a different image file.

Imagemagick crop install#

To install, use the sudo command with dnf: sudo dnf install ImageMagick parallelД«efore you start running the commands below, be aware the mogrify command overwrites the original image file. These packages are available in the Fedora repositories. The mogrify command is part of this suite.В You can use it to resize an image, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and much more. It can deal with lots of popular formats, such as JPEG, PNG, GIF, and more.

The ImageMagick suite of tools offers many ways to change or manipulate images. If you write loops in the shell, youвЂ™ll find parallel can often replace most of the loops and finish the work faster, by running several jobs in parallel. ItвЂ™s written to have the same options as xargs. If you use xargs or tee, youвЂ™ll find parallel easy to use. The GNU Parallel program can be used to execute jobs faster. How can you do this without reinventing the wheel? The answer is simple: use GNU Parallel and theВ ImageMagick utility suite.

With that in mind, you want to modify your task to work in parallel.

Imagemagick crop serial#

Everything is going fine, until you realize this process will take more time than expected.ДЄfter rethinking the process, you realize this task is taking so long because the serial method processes one image at a time. You might write a simple script or batch process to handle the conversion automatically with ImageMagick.

Imagine you need to make changes to thousands or millions of images.