透视投影和Z头缓冲3D头形成面部图像 [英] Perspective Projection and Z-buffering of a 3D head to form a face image

问题描述

输入： 53490 3D点和头的每个点（xyz）和颜色（rgb）

Input: 53490 3D points and for each point (xyz) and color (rgb) of a head

从特定位置/方向查看的2D脸部图片

Output: 2D face image as viewed from a particular position / direction

平台： Matlab C / C ++

Platform: Matlab C/C++

经过学习，我发现步骤可以实施

After study, I found the steps to be implemented

< a href =http://en.wikipedia.org/wiki/3D_projection =nofollow> http://en.wikipedia.org/wiki/3D_projection

• Z缓冲 http://en.wikipedia.org/wiki/Z-buffering


• Phong反射模型 http://en.wikipedia.org/ wiki / Phong_reflection_model

• Perspective Projection http://en.wikipedia.org/wiki/3D_projection
• Z-buffering http://en.wikipedia.org/wiki/Z-buffering
• Phong reflection model http://en.wikipedia.org/wiki/Phong_reflection_model

我在Matlab中实现了上述3个步骤。但是它需要8分钟的执行。 2D渲染是我项目的一部分;我将在5000次以后调用2D渲染部分。我希望执行时间低于1秒。

I implemented the above 3 steps in Matlab. But it takes 8 min for the execution. The 2D rendering is part of my project; I will be calling the 2D rendering part 5000 times later. I want the execution time under 1sec.

大部分（99.9％）的时间用于z缓冲。实现是在wiki链接之后完成的。

任何人都可以帮助我减少在Matlab中的时间或建议其他平台？
任何用于理解上述步骤的教程/演示参考都将有所帮助。

The bulk (99.9%) of time is taking for z-buffering. The implementation is done following the wiki link.
Can anyone help me to reduce the time in Matlab or suggest other platform? Any tutorials/demo references to understand the above steps will be helpful.

提前感谢

推荐答案

我不建议你这样做在matlab中，因为你可能需要可视化一个大的体积。
尝试vtk，您可能需要一些编程。

I don't recommend you doing this in matlab, because you may need to visualize a big volume. Try vtk, and you may need some programming.

这里是一个来自ImageJ的简单的3D项目： http://imagejdocu.tudor.lu/doku.php?id=gui:image:stacks

Here is a simple one (3D project) from ImageJ: http://imagejdocu.tudor.lu/doku.php?id=gui:image:stacks

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