![]() ![]() Just take a gander at this for a moment and try to decipher what is going on. Converting the image to grayscale with ImageMagick is simple: convert my-image.jpg -colorspace Gray my-image-gray.jpg The command is self-explanatory and executes in milliseconds. rwxr-xr-x 1 drew staff 23M Jul 12 04:17 Speakers-Rev01-102.CR2* convert -density 600圆00 -resize 800x560 -quality 90 file echo filecut -f1 -d. You can access ImageMagick functions directly from the command line using the ImageMagick tools convert, mogrify, montage, composite, or identify. It runs on Linux, Windows, Mac Os X, iOS, Android OS, and others. The current release is ImageMagick 7.1.0-34. rwxr-xr-x 1 drew staff 21M Jul 12 04:13 Speakers-Rev01-100.CR2* ImageMagick utilizes multiple computational threads to increase performance and can read, process, or write mega-, giga-, or tera-pixel image sizes. If you're all set, let's take a look at the one-liner solution and then I'll explain each part of the pipeline.īut before that, make sure your current working directory has some RAW files to play with, like so: cd ~/raw-pix & ls -la If successful, you should have the convert and ufraw-batch commands available in your terminal: which convert & which ufraw-batch brew install freetype little-cms2 webp # necessary ImageMagick libs + extras While we're at it, let's grab a handful of other libs to make our ImageMagick install robust for any other future needs. ImageMagick offers the convert command we will use to do the heavy lifting. Install these first: brew install libpng jpeg libtiff dcraw little-cms exiv2 # ufraw dependencies + exiv2 supportīrew install ufraw -with-exiv2 # RAW image support for imagemagick Get ImageMagick with cool extras RAW support is achieve via the ufraw package, which has its own set of library dependencies. Grab it like so: ruby -e " $(curl -fsSL )"īrew update # update to latest package listingīrew doctor # make sure everything is cool with homebrew Get some basic libs everyone should have brew install pkg-config cmake glib zlib libtool RAW Support Instead of writing one webp per png, I get one webp file with all the images as an animation. If you don't already have Homebrew, shame on you. Imagemagick batch convert to webp, without making an animation. It also explains why IrfanView is so much. Install ImageMagick with RAW support via Homebrew. Tech blog Of Zen and Computing describes how to use the free command line program ImageMagick to convert a set of images from one file format to another (like JPGs to PNGs). In IrfanView and ImageMagick we can control the quality setting from 0 (uncompressed) up to 9 (max compression). The TaskĬonvert an entire folder of RAW images, typically produced by DSLR camera at 300dpi and convert them all to web-ready, 72dpi JPEG's in a single bash command while utilizing all eight threads in parallel on a quad-core i5 CPU. Above: A JPEG image from the Philly workshop batch converted from RAW by the method detailed below.
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