C++ 将 ppm 转换为 png
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Converting ppm to png
提问by Harshad Kshirsagar
In Linux I am getting .PPM files as the image format, this needs to be converted to PNG and then saved. I was looking at some API's to achieve this conversion from PPM to PNG. Can this be done using GDI+, as this would become native?
在 Linux 中，我将 .PPM 文件作为图像格式，这需要转换为 PNG 然后保存。我正在寻找一些 API 来实现从 PPM 到 PNG 的这种转换。这可以使用 GDI+ 完成吗，因为这将成为本机？
If that is not possible then I think freeimage or pnglib can accomplish that, however I would prefer to use native gdi+ if possible.
如果这是不可能的，那么我认为 freeimage 或 pnglib 可以做到这一点，但是如果可能的话，我更愿意使用本机 gdi+。
回答by joni
Quick and dirty: download Imagemagick and use it from CLI:
快速而肮脏：下载 Imagemagick 并从 CLI 使用它：
convert xx.ppm xx.png
or use Imagemagick's dll API
或使用 Imagemagick 的 dll API
回答by Mark Setchell
Whilst ImageMagickwill happily do what you need, it is actually a sledgehammer to crack a nut, and considerably more cumbersome and space and time-consuming to install than the NetPBMsuite.
虽然ImageMagick会很乐意做你需要的事情，但它实际上是一把大锤，比NetPBM套件安装起来要麻烦得多，而且安装起来更费时。
With that, you would do:
有了这个，你会这样做：
pnmtopng image.ppm > result.png
回答by B?ови?
You can use ImageMagick library :
您可以使用 ImageMagick 库：
http://www.imagemagick.org/script/index.php
http://www.imagemagick.org/script/index.php
but it does lots of other things.
但它做很多其他的事情。
