The example above keeps it as large as it can be given the input image. Once the aspect is right, you can follow up the two -extent operations with a -resize to bring the finished image to your output size. Imgar=`convert "$in" -format "%" info:`Ĭonvert "$in" -gravity center -crop $+0+0 "$out" This is more involved: aw=16 #desired aspect ratio width. If you want to avoid scaling, you have to calculate the new length of the cropped side outside of Imagemagick. To loop over multiple jpg files: for i in *jpgĭo convert "$i" -geometry 1920x1080^ -gravity center -crop 1920x1080+0+0 out-"$i" If you want a description of a particular option, click on the option name in the navigation bar above and you will go right to it. If your goal at the end is to have a certain resolution (for example 1920x1080) then it's easy, using -geometry, the circumflex/hat/roof/house symbol ( ^) and -crop: convert in.jpg -geometry 1920x1080^ -gravity center -crop 1920x1080+0+0 out.jpg ImageMagick Command-line Options Annotated List of Command-line Options Below is list of command-line options recognized by the ImageMagick command-line tools. Note: you need to add magick before any convert for v7. gravity center -crop 3:2 +repage out.png Imagemagick 6.9.9-34 and above JPG convert in.jpg -gravity center -crop 3:2 out.jpg magick logo: -gravity center -crop 3:2 result.png. For cropping the center, -extent with -gravity Center will work. ![]() The second will produce a 320x480 image cropped from the center. 72 You would use the area-fill ( ) geometry modifier on the -resize operation to unify the down-scale. The first command here results in a 640x427 crop from the center of the logo. Out+repage.png PNG 252x168 252x168+0+0 8-bit sRGB 78529B 0.000u 0:00.000 GeeMack wrote: The default appears to crop the largest W:H area without regard to the proportions of the input image. magick logo: -resize 160x -resize x160< -resize 50 -gravity center -crop 80x80+0+0 +repage spacefill2. ![]() Out_stndrd.png PNG 252x168 314x168+31+0 8-bit sRGB 78557B 0.000u 0:00.000 1 Answer Sorted by: 3 You need to add the information from which X and Y you want to start, otherwise Imagemagick will repeat the crop: convert foo.png -gravity north -crop 1000x100+0+0 bar. GIMP, IrfanView, Chrome and Windows Explorer don't show any difference, but Imagemagick knows: magick identify out*png I have a big image that I want to resize to 230×320 (exactly). magick convert in.png -gravity center -crop 3:2 +repage out+repage.png Resize with crop using ImageMagick.NET and C. Warning/reminder: if you don't use -gravity center, you will get two output files:Īs fmw42 points out, PNG files store the virtual canvas size. JPG magick convert in.jpg -gravity center -crop 3:2 out.jpg ![]() Solution 1 Imagemagick 7.0.7.22 and above
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