高级色度键代码示例
我正在开发一个应用程序，需要从绿屏前的网络摄像头拍摄的图像中抠出背景。我认为这将是一个非常常见的任务，但令我惊讶的是，我很难找到比简单颜色阈值更高级的代码示例，而且这些示例并不能完全降低质量。
我找到了一些 pdf 论文，但我在将这些相当高的概念转化为实际实现时遇到了麻烦，我宁愿看一些代码。
这里的重点是质量，有一秒或更多的处理时间不是问题。
我将使用 Actionscript 3（可能还有 Pixel Bender）来实现这一点，但我也很乐意看看其他语言。
如果您有任何好的示例，整个过程或部分，请发布它们！
I'm working on an application that needs to key out the background from an image taken by a webcam in front of a green screen. I figured this would be a very common task, but to my surprise i'm having trouble finding code samples for anything more advanced than a simple color-threshold and those do not quite cut it quality wise.
I've found a few pdf-papers, but I'm having trouble translating these rather high concepts into actual implementations, I'd much rather look at some code.
Focus here is on quality, having a second or more of processing time is not a problem.
I will be using actionscript 3 (and possibly pixel bender) to implement this, but I'll happily look at other languages aswell.
If you have any good samples doing this, the whole process or parts, please do post them!
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如果你对色键质量要求不高，也许这个(http://www.quasimondo.com /archives/000615.php）会没问题的。
但对于高质量视频（即720*576视频）来说，这并不是一件容易的事。
我花了很多时间研究高质量的色键算法，最后我找到了一种用于实时视频的算法（用c/c++实现），它可以作为插件或独立应用程序在非线性视频编辑系统中使用。
我在 voicethread.com 网站上展示了一些演示静态图像，每个人都可以在那里用文字或语音进行评论。
http://voicethread.com/share/801789/
If you have no high requirement for chromakey quality, maybe this(http://www.quasimondo.com/archives/000615.php) will be okay.
But for high quality video( i.e, 720*576 video ), it is not easy job.
I have spent a lot time to research high quality chromakey algorithm, finally I have figured out one algorithm(implemented with c/c++) for real time video,which can be used in none-linear video editing system as plugin or standalone application.
I put some demo static images to show at voicethread.com websites, everyone can comment with text, or voice there.
http://voicethread.com/share/801789/