new_folder *.pngįor more complex processes, it is recommended that you write your own script that uses ‘convert’ rather than ‘mogrify’.Ĭheck out this list of libraries, modules and packages for interfacing with your favourite scripting language. So depth 8 will fail because it takes 8bit for red, 8bit for green and 8bit for blue. Save as a jpg, output to ‘new_folder’, resize to 50%: 800圆00x (16bit/2byte)960000bytes, the 16bit are in the format 5bit for red, 6bit for green and 5bit for blue (rgb565). Save as a jpg and output to the directory ‘new_folder’: In these examples, the script will operate on all png files within the current folder. Batch Process Imagesīatch processing with mogrify is probably where Imagemagick comes into its own. The convert command is used to operate on single images and it’s repertoire of functions is much greater than that of mogrify.Ĭonvert input.jpg -gravity South -annotate 0 '%f' output.jpgįor a more advanced labelling method, see here. Be careful not to modify images without a backup! Processing Individual Images Mogrify on the other hand will quite happily change the original file, unless you specify a separate output location. Alternatively install graphicsmagick for GraphicsMagick, a fork of ImageMagick. It can read and write over 200 image file formats. The main difference is that ‘ convert‘ tends to be for working on individual images, whereas ‘ mogrify‘ is for batch processing multiple files.Īnother key distinction is that convert is designed to modify an image and output to a separate file. ImageMagick is a free and open-source software suite for displaying, converting, and editing raster image and vector image files. It’s worth pointing out that Imagemagick has two main commands for modifying images. There is a very good and comprehensive list of ‘ basic‘ commands, but I find it dwarfs the selection that I actually need, so here are some useful Imagemagick commands that I can never remember how to use. It’s hugely powerful with all kinds of functions and features, and I can never quite remember how to use my favourite commands. Imagemagick is a command-line based image processing suite.
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