Image Magick Usage Summary

Using the image magick feeling very powerful.

Original address: http://blog.csdn.net/newborn2012/article/details/24964577

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ImageMagick Document: http://www.imagemagick.org/script/command-line-options.php

Convert powerful, used to batch image amplification, reduction, cropping, rotation, merging, watermark, splicing, format conversion, etc. are very convenient, especially for the background image processing. 1. Get picture information

[plain] view plain copy $identify image.png image.png png 559x559 559x559+0+0 8-bit SRGB 467KB 0.000u 0:00.008

If you only need to get a wide height:

[plain] view plain copy $identify-format "%wx%h" image.png

2, zoom in, Zoom out-resize

[plain] view plain copy $convert image.png-resize 200x200 resize.png

can also be scaled (halved):

[plain] view plain copy $convert image.png-resize 50% resize.png

You can also zoom in multiple times (half-scaled, then magnified one more time, the effect is blurred):

[plain] view plain copy $convert image.png-resize 50%-resize 200% resize.png

3, zooming in and out-sample differs from resize in that-sample is only sampled and not interpolated, so it is most appropriate to generate thumbnails [plain]   View Plain copy $convert  image.png -sample 50% sample.png   The effect of this process is mosaic: [ Plain]   View plain copy $convert  image.png -sample 10% -sample 1000%  sample.png   4, crop-crop to crop a 100x100-sized picture starting at (50,50) position: [plain]   View Plain Copy $convert  image.png -crop 100x100+50+50 crop.png   If you do not specify a location, The small picture is separated by this size, and this command generates CROP-0.PNG,CROP-1.PNG,CROP-2.PNG ... : [Plain]   View plain copy $convert  image.png -crop 100x100 crop.png    can specify the relative position of the clipping position-gravity: [plain]   View plain copy