However, using the – resize options we have covered, it is, of course, perfectly feasible to enlarge our image. To conclude this section, typically, the most common way to change the size of an image is to shrink it to fit the desired size. Consequently, the actual scale may not exactly match the scaling factor we provide, but it will be very close. This will scale the image by the amount specified: convert flower_original.jpeg -resize 50% half_flower.jpegįor most of us, this type of scaling will be perfectly fine, but we should note that the final pixel size of the image will be rounded to the nearest integer. Similarly, we can also specify a percentage value when using the resize option. ![]() In this example, we fit our original flower image into a smaller square box 64×64 pixels in size: This means you can also use: convert -size 800x800 canvas:white white. We can build on the previous example by using the -resize option of the convert command: convert flower_original.jpeg -resize 64圆4 flower_64圆4.jpeg 2 Answers Sorted by: 75 White background convert -size 800x800 xc:white white.png xc: used to mean 'X Constant Image' but now is just a shorthand for canvas. Heres the condensed version: If you have shell access to the OS X system, then perhaps the easiest option is to download the binary ImageMagick distribution and create a new directory to extract it to, for example /opt/im/. ![]() Another typical operation is image resizing. ImageMagick itself has good documentation for installing ImageMagick on Mac OS X with the binary release that they provide.
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