用imagemagick分割图像 [英] Splitting image with imagemagick

问题描述

我在透明背景上有许多较小的图像（不接触）组成的大图像。像spritesheet一样，但精灵的大小不一样，也没有在网格上布局。

I have a large image made up of lots of smaller images (not-touching) on a transparent background. Like a spritesheet, but the sprites aren't all the same size, nor are they laid out on a grid.

我可以使用ImageMagick将图像分割成更小的图像？

Can I use ImageMagick to split the image into smaller images?

所以，例如，这个:(其中＃ =彩色像素）

So, for example, this: (where # = colored pixel)

  #   ##
  #   # 
    # # 
  ###   

成为这些

#
#

##
#
#

  #
###

推荐答案

您可以在一个命令中执行此操作并非常有效地执行此操作。例如，这个命令：

You can do this in one single command and do it very efficiently. For example, this command:

time convert \
   very-very-large.png \
  -quality 85 \
  -write mpr:mpc:label \
  +delete \
     mpr:mpc:label -crop '3000x2001+0+491' -resize '170x116!>'   -write pic1.png +delete \
     mpr:mpc:label -crop '2981x2883+8+0'   -resize '75x75!>'     -write pic2.png +delete \
     mpr:mpc:label -crop '1100x1983+0+0'   -resize '160x160!>'   -write pic3.png +delete \
     mpr:mpc:label -crop '2000x2883+0+0'   -resize '1024x960!>'  -write pic4.png +delete \
     mpr:mpc:label -crop '1000x2883+0+0'   -resize '190x188!>'   -write pic5.png +delete \
     mpr:mpc:label -crop '3000x2000+0+0'   -resize '2048x2047!>' -write pic6.png +delete \
     mpr:mpc:label -crop '3000x2883+0+0'   -resize '595x421!>'   -write pic7.png +delete \
     mpr:mpc:label -crop '3000x2883+0+0'   -resize '3000x2883!>' -write pic8.png

将剪切并保存（以不同名称）8个不同的子图像来自大的。

will cut and save (under different names) 8 different sub-images from the large one.

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