Imagemagick结合了几个命令 [英] Imagemagick combine several commands

问题描述

我有四张图片，a.png，b.png，c.png，d.png。
现在我想组成图像a，b和c并将它们着色后我想用d.png组合结果。我想用一个命令做到这一点：

I have four images, a.png, b.png, c.png, d.png. Now I would like to compose image a, b and c and colorize them after that I would like to compose the result with d.png. I want to do this with one command:

magick a.png b.png c.png -compose -channel R -evaluate multiply 0.9 - channel G -evaluate multiply 0.9 -channel B -evaluate multiply 0.9 d.png -compose result.png

但这对我不起作用要获得正确的输出，我必须通过两个步骤来完成：

But this does not work for me to get the right output I have to made this by two steps:

magick a.png b.png c.png -channel R -evaluate乘以0.9 -channel G -evaluate乘以0.9 -channel B -evaluate multiply 0.9 step.png

和

magick step.png d.png -compose result.png

有没有结合几个命令的解决方案？

Is there any solution to combine several commands?

推荐答案

不太确定你想要做什么，但希望以下想法会有所帮助.. 。

Not too sure what you are trying to do, but hopefully the following thoughts will help...

首先，你有

... -channel R -evaluate multiply 0.9 -channel G -evaluate multiply 0.9 -channel B -evaluate multiply 0.9

当你不妨使用时：

... channel RGB -evaluate multiply 0.9

其次，在选择要处理的特定频道后（使用 -channel ），您应该在最终 -composite +频道） $ C>。所以，我认为你可能会做得更好：

Secondly, after selecting a specific channel to work on (with -channel), you should then revert back to dealing with all channels (using +channel) before your final -composite. So, I think you may do better with this:

magick a.png b.png c.png -composite -channel RGB -evaluate multiply 0.9 +channel d.png -composite result.png

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