ImageMagick on the iPhone: Convert, edit, or compose images on your iOS computing device such as the iPhone or iPad.Heterogeneous distributed processing: certain algorithms are OpenCL-enabled to take advantage of speed-ups offered by executing in concert across heterogeneous platforms consisting of CPUs, GPUs, and other processors.Distributed pixel cache: offload intermediate pixel storage to one or more remote servers.
Sets the relative size of the checkerboard squares, Generate a checkerboard of size 320x180. Single threaded seems faster on smaller files gm convert -limit Threads 1 -size 320x180 pattern:checkerboard -background transparent -gravity center -resize 320x180 -extent 320x180 original.jpg -flatten -resize 112圆5! -interlace Line 1 thumb_112圆5.jpg ImageMagick can resize, flip, mirror, rotate, distort, shear and transform images, adjust image colors, apply various special effects, or draw. It can read and write images in a variety of formats (over 200) including PNG, JPEG, GIF, WebP, HEIC, SVG, PDF, DPX, EXR and TIFF. I'm using graphicsmagick to generate precisely sized thumbnails but I'm padding the image with a checkerboard instead of cropping the overhang. Use ImageMagick® to create, edit, compose, or convert digital images.