Join the nixCraft community via RSS Feed or Email Newsletter. He wrote more than 7k+ posts and helped numerous readers to master IT topics. Vivek Gite is the founder of nixCraft, the oldest running blog about Linux and open source. Update: Tim (below in comment) pointed out another method and script, to create thumbnails for jpg images with optimization in mind.For more information see: usr/bin/ convert -thumbnail 200 $i thumb.$i Nevertheless here is sample shell script: i in $FILES $ convert -thumbnail x200 abc.png īut, hold on real part is ahead, since I had to go through 10000+ images I wrote perl script (although I can not put real script here because of legal issues). To create a thumbnail of the abc.png image with 200px height, you need to type: So to create a thumbnail of the abc.png image with 200px width, you need to type: You need to pass -thumbnail argument to convert command:Ĭonvert thumbnail x image.png thumbnail.png The two most common commands are mogrify and convert, where mogrify overwrites the existing image and convert saves the image as a new image without modifying the original image.Install imagemagick, use apt-get command as follows: If ImageMagick is not pre-installed on your system you can follow the installation instructions which are pretty straight forward for the various operating systems. The various command-line tools can be seen in the documentation and their usage can be seen in the examples. It can be incorporated into shell scripts, batch files or through other programs for automatic processing of images. ImageMagick can do a lot of different graphics editing tasks and it even can create new images from the command-line. Here I’ll introduce a few common commands I had to look up multiple times. One tool I commonly use in these desperate situations is ImageMagick, which is a powerful tool when automating raster and vector image processing. There are times being stuck with a load of images that need to be cropped, resized or converted, but doing this by hand in an image editor is tedious work. Creating Optimized GIFs in the Command-Line.

Linux imagemagick convert