I have a collection of transparent .png files. They are all a standard canvas size of 220x132 but the image might only be for example 150x40 with the rest of the image being transparent background..
我有一组透明的.png文件。它们都是220x132的标准画布尺寸，但图像可能仅为150x40，其余图像为透明背景。
Is there a way to crop the canvas size to the actual visible image area using linux script?
有没有办法使用linux脚本将画布大小裁剪到实际的可见图像区域？
1 个解决方案
#1
1
ImageMagick is a powerful framework for doing all kinds of image editing from the command line. Cropping is a part of it.
ImageMagick是一个功能强大的框架，用于从命令行执行各种图像编辑。裁剪是其中的一部分。
See the documentation here: http://www.imagemagick.org/Usage/crop/ Of special interest for you might be the trim command: http://www.imagemagick.org/Usage/crop/#trim
请参阅此处的文档：http：//www.imagemagick.org/Usage/crop/特别感兴趣的可能是trim命令：http：//www.imagemagick.org/Usage/crop/#trim
However, it might very well be, that a simple repage does the job. This depends on how your PNG image is built: PNGs can contain layer boundary information. trim will be perfectly fine for you, but repage might be faster when dealing with a huge amount of images.
然而，很可能，一个简单的重新制作完成了这项工作。这取决于PNG图像的构建方式：PNG可以包含图层边界信息。修剪对你来说非常好，但是在处理大量图像时，重新制作可能会更快。
When ImageMagick is installed, try these commands: identify, display, convert, mogrify on your images.
安装ImageMagick时，请尝试以下命令：识别，显示，转换，mogrify对您的图像。
#1
1
ImageMagick is a powerful framework for doing all kinds of image editing from the command line. Cropping is a part of it.
ImageMagick是一个功能强大的框架，用于从命令行执行各种图像编辑。裁剪是其中的一部分。
See the documentation here: http://www.imagemagick.org/Usage/crop/ Of special interest for you might be the trim command: http://www.imagemagick.org/Usage/crop/#trim
请参阅此处的文档：http：//www.imagemagick.org/Usage/crop/特别感兴趣的可能是trim命令：http：//www.imagemagick.org/Usage/crop/#trim
However, it might very well be, that a simple repage does the job. This depends on how your PNG image is built: PNGs can contain layer boundary information. trim will be perfectly fine for you, but repage might be faster when dealing with a huge amount of images.
然而，很可能，一个简单的重新制作完成了这项工作。这取决于PNG图像的构建方式：PNG可以包含图层边界信息。修剪对你来说非常好，但是在处理大量图像时，重新制作可能会更快。
When ImageMagick is installed, try these commands: identify, display, convert, mogrify on your images.
安装ImageMagick时，请尝试以下命令：识别，显示，转换，mogrify对您的图像。