使用ImageMagick（或类似）覆盖图像的文件名 [英] Overlaying an image's filename using ImageMagick (or similar)

问题描述

我知道ImageMagick的 annotate 命令可以在图像上叠加一些文字，但是它可以使用图像的文件名作为此文本吗？我会这么认为，但似乎无法找到确认这一点的直接文档。

I know ImageMagick's annotate command can superimpose some text over an image, but can it use the image's filename as this text? I would've assumed so, but can't seem to find direct documentation that confirms this.

毫无疑问，某些参数组合可以管理这个，或者是否有更好的在脚本中这样做的方法？

No doubt some combination of parameters can manage this, or is there a better way of doing this in a script?

推荐答案

Eric L.的回答是正确的 - 来自我的+1！ - 但 -annotate 并不能让你对文本的外观有太多控制。

Eric L.'s answer is correct -- +1 from me for it! -- but -annotate doesn't give you much control over the appearance of the text.

如果你看为了漂亮，然后去寻找使用 -composite 的东西。您可以使用IM命令首先构建叠加图像（使用半透明背景），然后将其覆盖在原始图像上。

If you look for prettyness, then rather go for something that uses -composite. You can use an IM command to construct an overlay image first (which uses a semi-transparent background) and then overlay it over the original image.

这是一个示例如何用 -composite 代替 -annotate ，使用脚本方法处理当前目录中的每个PNG文件。这个甚至自动调整字体大小并使其适合可用的宽度* 90％ - 它是一个Bash脚本（请参阅Win等效的评论）：

Here is an example how to do it with -composite instead of -annotate, using a scripted approach that processes every PNG file in the current directory. This one even automatically adapts the font size and fits it into the available "width * 90%" -- it is a Bash script (see comments for Win equivalent):

for img in *.png; do

   width=$(identify -format %W ${img})
   width=$(( ${width} * 9 / 10 ))

   convert                  \
     -background '#0008'    \
     -gravity center        \
     -fill white            \
     -size ${width}x100     \
      caption:"${img}"      \
      "${img}"              \
     +swap                  \
     -gravity south         \
     -composite             \
      "with-caption-${img}"

done

下面是一个原件和相应输出的示例说明：

An example illustration for one original and the respective output are below:

  ！

这是一个使用 -annotate 的命令，试图设置一些超出默认参数的东西：

Here is a command that uses -annotate, trying to set a few things beyond the default parameters:

for img in so#12231624-right.png; do

   convert                   \
      "${img}"               \
     -fill red               \
     -undercolor '#0008'     \
     -pointsize 24           \
     -gravity south          \
     -annotate +0+5 "${img}" \
      "with-annotate-${img}"

done

 

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