如何使用 ImageMagick 剪切选择性图像

Question

我想截取专门针对移动设备的屏幕截图。并依次打包成pdf。

#!/bin/sh

desktop_path=./screenshots/desktop/
mobile_path=./screenshots/mobile/
pdf_path=./pdf/

convert ${desktop_path}screenshot-1.png ${desktop_path}screenshot-2.png ${desktop_path}screenshot-3.png ${desktop_path}screenshot-4.png ${desktop_path}screenshot-5.png ${desktop_path}screenshot-6.png ${desktop_path}screenshot-7.png ${desktop_path}screenshot-8.png ${desktop_path}screenshot-9.png ${desktop_path}screenshot-10.png ${desktop_path}screenshot-11.png ${desktop_path}screenshot-12.png ${desktop_path}screenshot-13.png -chop 0x0 ${mobile_path}screenshot-1.png ${mobile_path}screenshot-2.png ${mobile_path}screenshot-3.png ${mobile_path}screenshot-4.png ${mobile_path}screenshot-5.png ${mobile_path}screenshot-6.png ${mobile_path}screenshot-7.png ${mobile_path}screenshot-8.png ${mobile_path}screenshot-9.png ${mobile_path}screenshot-10.png ${mobile_path}screenshot-11.png ${mobile_path}screenshot-12.png ${mobile_path}screenshot-13.png ${mobile_path}screenshot-14.png -chop 0x43 ${pdf_path}packets-temp.pdf

我在这里面临的问题是，即使我为桌面定义了-chop 0x0，但它并没有跳过桌面的斩波，而是像在移动设备上一样为桌面斩波 43px。

Answer 1

如果您不希望对某些图像应用切割，请将您想要切割的图像放在括号中并直接切割它们：

convert NoChop.png \( ChopMe.png ChopMeToo.png -chop 10x10 \) ... 

或者，先加载你想要切碎的，切碎，然后添加你不想切碎的：

convert ChopMe.png ChopMeToo.png -chop 10x10 NoChop.png ...

Answer 2

#!/bin/sh

desktop_path=./screenshots/desktop/
mobile_path=./screenshots/mobile/
mobile_cropped_path=./screenshots/mobile/cropped/
pdf_path=./pdf/

mogrify -path ${mobile_cropped_path} -chop 0x43 ${mobile_path}*.png 

convert ${desktop_path}*.png ${mobile_cropped_path}*.png ${pdf_path}packets-temp.pdf