Commands to manipulate images | LinuxGist

Here are several Linux commands that can be used to manipulate images, including cropping and changing formats:

1. ImageMagick

ImageMagick is a powerful suite of tools for image manipulation.

Basic Usage:

• Install ImageMagick:

  sudo apt-get install imagemagick  # For Debian-based systems
  sudo yum install ImageMagick      # For Red Hat-based systems
  

• Crop an image:

  convert input.jpg -crop widthxheight+x+y output.jpg
  

  Example:

  convert example.jpg -crop 200x300+50+75 output.jpg
  

• Change the format of an image:

  convert input.jpg output.png
  

2. GIMP

GIMP (GNU Image Manipulation Program) is a free, open-source image editor.

Basic Usage:

While GIMP is primarily a graphical tool, you can use it from the command line using the GIMP CLI:

• Install GIMP:

  sudo apt-get install gimp  # For Debian-based systems
  sudo yum install gimp      # For Red Hat-based systems
  

• Open an image in GIMP:

  gimp input.jpg
  

3. GraphicsMagick

GraphicsMagick is a free, open-source software suite to create, edit, and compose bitmap images.

Basic Usage:

• Install GraphicsMagick:

  sudo apt-get install graphicsmagick  # For Debian-based systems
  sudo yum install GraphicsMagick      # For Red Hat-based systems
  

• Crop an image:

  gm convert input.jpg -crop widthxheight+x+y output.jpg
  

  Example:

  gm convert example.jpg -crop 200x300+50+75 output.jpg
  

• Change the format of an image:

  gm convert input.jpg output.png
  

4. sips

sips is a command-line tool for manipulating images, available on macOS.

Basic Usage:

• Install sips (macOS):

  xcode-select --install
  

• Crop an image:

  sips -z width height input.jpg --out output.jpg
  

  Example:

  sips -z 200 300 example.jpg --out output.jpg
  

• Change the format of an image:

  sips -s format png input.jpg --out output.png
  

5. ffmpeg

ffmpeg can also be used to handle images, especially for batch processing.

Basic Usage:

• Install ffmpeg:

  sudo apt-get install ffmpeg  # For Debian-based systems
  sudo yum install ffmpeg      # For Red Hat-based systems
  

• Crop an image (using ffmpeg):

  ffmpeg -i input.jpg -vf "crop=width:height:x:y" output.jpg
  

  Example:

  ffmpeg -i example.jpg -vf "crop=200:300:50:75" output.jpg
  

• Change the format of an image (using ffmpeg):

  ffmpeg -i input.jpg -c:v libpng output.png
  

These commands provide a variety of ways to manipulate images using command-line tools in Linux. Each tool has its own set of features and capabilities, so you can choose the one that best suits your needs.