管理PNG优化图书馆可用？ [英] Managed PNG Optimization Library Available?

问题描述

我期待建立PNG优化（各种各样的PNGsqeezer / squisher）到我的构建（TFS 2010构建工作流）。我想创建一个新的建设活动，并与我的所有活动，我更喜欢有我所有的代码很少设法没有依赖关系。

I am looking to build in PNG optimization (a PNG "sqeezer/squisher" of sorts) into my builds (TFS 2010 Build Workflow). I want to create a new build activity and as with all my activities, I prefer to have all my code managed with little to no dependencies.

我已经搜索（谷歌搜索）并发现PNG optimiaztion许多不同的PNG库。 PNGOUT，PNGCRUSH，使用OptiPNG等，他们都不是真正的.NET。他们都看起来像伟大的工具。我比较喜欢的不可以从我的代码活动调用EXE文件（独立进程），因为你永远不知道会发生什么（不可靠）。

I have searched (Googled) and found many different PNG libraries for PNG optimiaztion. PNGOUT, PNGCRUSH, OptiPNG, etc. None of them are really .NET. They all seem like great tools. I prefer not to call EXE files (separate processes) from my code activity because you never really know what will happen (less reliable).

所以，我想也许PNGGauntlet将是一种选择。但在安装的应用程序，它仅仅是一个C＃GUI调用二进制pngout.exe快速寻找。 。这正是我不想做

So i thought maybe PNGGauntlet would be an option. But looking quickly at the installed application, its merely an C# GUI that calls the binary pngout.exe. That is exactly what I don't want to do.

所以我的问题是这样的：是否有一个开源和/或免费.NET库，做PNG压缩（DLL）？

So my question is this : Is there an open-source and/or free .NET library (DLL) that does PNG compression?

推荐答案

我刚刚发现了这个： nQuant 。从项目页面：

I've just found this one: nQuant. From the project page:

nQuant是一个.NET的颜色量化产生高品质的256色
8位PNG图像。 nQuant常常降低了32位的图像的大小，以一个
尺寸小于其原始质量超过什么
中的标准C命令行实用程序产生的3倍。

nQuant is a .net color quantizer that produces high quality 256 color 8 bit PNG images. nQuant often reduces the size of a 32 bit image to a size 3 times smaller than its original with quality surpassing what the standard C command line utilities produce.

我曾与一些样本测试的PNG出来，它确实产生了良好的8位输出，比.NET自己的8位编码器和无可见抖动更小，甚至平滑处理的图像。我想一件事，但是：处理可能有点慢，但不幸的是库没有优化代码的并行变体。我工作的一个解决方案。

I've tested it out with some sample PNGs and it really does produce a good 8-bit output, smaller than .NET's own 8-bit encoder and with no visible dithering, even for antialiased images. I miss one thing, however: the processing can be a bit slow, but the library unfortunately doesn't have a parallelized variant of the optimization code. I'm working on a solution for this.

更新（2013年1月21日），我已经重构代码，它运行10倍的速度，现在，即使没有并行线程。叉是在这里： http://nquant.codeplex.com/SourceControl/network/forks/breki74/nQuantFaster

UPDATE (Jan 21, 2013), I've refactored the code, it runs 10 times faster now, even without the parallel threads. The fork is here: http://nquant.codeplex.com/SourceControl/network/forks/breki74/nQuantFaster

更新（2013年2月24日），我的叉子被合并到主干。享受。

UPDATE (Feb 24, 2013), my fork was merged to the trunk. Enjoy.

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