Use sips command on mac to trim bottom of image

问题

I want to write a batch command script for osx that will crop off the bottom of an image. Is that possible using sips?

I have a bunch of images 640 x 1136 and I want crop them (not scale or resize) to 640 x 960. When the image is cropped, I want the bottom of the image removed and the top to stay the same. Basically, I just want to cut the bottom of the image off.

I have this but it's cropping both from the top of the image and bottom.

sips --cropToHeightWidth 640 960

回答1:

Doesn't look like it's possible. Thanks guys.

回答2:

It's only taken me 2 years to think this up... but you can do it with the GD library which is actually included in the standard, built-in OSX PHP interpreter (so no need to install any packages):

#!/usr/bin/php -f

<?php
   $im = imagecreatefromjpeg("image.jpg");
   $crop_area = array('x'=>0,'y'=> 0,'width'=>640,'height'=>960);
   $result = imagecrop($im, $crop_area);
   imagejpeg($result,"result.jpg");
?>

To call from Terminal, you would save it in a file, called say chopper and then make the file executable like this:

chmod +x chopper

and then you could run it by typing:

./chopper

or double-clicking it in Finder.

I guess you would want to make it take parameters of the filename to open and the filename to save and the dimensions, but you get the idea.

回答3:

You could also use the flip mode twice.

sips --flip vertical image.jpg
sips --cropToHeightWidth 640 960
sips --flip vertical image.jpg

This has done it for me.

Update

Like the comments says this solution does not work any longer. Sorry for that.

来源：https://stackoverflow.com/questions/19867726/use-sips-command-on-mac-to-trim-bottom-of-image

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macos

terminal

sips