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Phace:基于物理的面部建模和动画 – 译学馆
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Phace:基于物理的面部建模和动画

Phace: Physics-based Face Modeling and Animation | Two Minute Papers #172

亲爱的学霸们 这是由Károly Zsolnai-Fehér带来的两分钟论文
Dear Fellow Scholars, this is Two Minute Papers with Károly Zsolnai-Fehér.
这次讲述了在虚拟人脸上改变神态的有关内容
This work is about transferring our gestures onto a virtual human’s face in a way that
从这一点来看 是对身体的调整
is physically correct.
这意味着不仅仅要将面部几何的变化转移成数字字符
This means that not only the changes in the facial geometry are transferred to a digital
是的 不只是这样
character, no, no, no.
这是它的工作原理
Here’s how it works.
这项工作针对我们的面部使用了非常炫酷的数字化表现法
This piece of work uses a really cool digital representation of our face that contains not
它不仅包含几何学 同时还包括骨肉和肌肉结构的
only geometry, but there is also information about the bone and flesh and muscle structures
信息
as well.
它建立在一个精确的物理模型上
This means that it builds on a physically accurate model, which synthesizes animations
该模型由​​人脸上适当的肌肉驱动 合成动画
where this human face is actuated by the appropriate muscles.
我们通过注册程序 以用户外观扫描开始
We start out with a surface scan of the user, which through a registration step, is then
将其转换成我们渴望实现的一组表达式
converted to a set of expressions that we wish to achieve.
逆物理模块会试图去猜测到底使用哪一块肌肉
The inverse physics module tries to guess exactly which muscles are used and how they
并如何利用它们来实现这些目标表达式
are used to achieve these target expressions.
通过动画过程 获取到所期望的表达对象适时演变的信息
The animation step takes the information of how the desired target expressions evolve
以及一些物理信息 例如重力或风力
in time, and some physics information, such as gravity or wind, and the forward physics
和前沿物理单元计算的终极仿真数字字符
unit computes the final simulation of the digital character.
所以当我们谈论重力和风力的影响时 你就能看到它们是如何创造出更有说服力的产品
So while we’re talking about the effects of gravity and wind, here you can see how this
因为这些特性已经成为他们数据环境的
can create more convincing outputs because these characters really become a part of their
一个组成部分
digital environment.
因此 一个人的身体质量指数改变同时决定于
As a result, the body mass index of a character can also be changed in both directions, slimming
面部肌肉质量的增加或减少
or fattening the face.
放大唇部也有可能
Lip enhancement is also a possibility.
如果我们有超高分辨率的面部扫描仪器 也许在跟进工作中可以模拟肉毒杆菌注射
If we had super high resolution facial scans, maybe a followup work could simulate the effects
的效果
of botox injections.
那该有多酷啊!
How cool would that be!
此外 我最喜欢的功能之一在于 它也可以进行
Also, one of my favorite features of this technique is that it also enables artistic
艺术编辑
editing.
通过绘图 我们还可以列举出硬度和质量分布的示意图
By means of drawing, we can also specify a map of stiffness and mass distributions, and
如果觉得太残忍 我们还可以创建一个仅仅模拟丧尸模型和动画
if we feel cruel enough, we can create a barely functioning human face to model and animate
的人脸
virtual zombies.
想象一下艺术家可以做什么 特别是在超高分辨率纹理和真实感图像渲染
Imagine what artists could do with this, especially in the presence of super high resolution textures
的情况下
and photorealistic rendering.
哇哦 我的天!
Oh, my!
这是对计算机制图和动画绘制未来发展的新视角
Another glimpse of the future of computer graphics and animation.
为了确保您能观看到更多有关应用软件的论文 例如
Make sure to have a look at the paper for more applications, for instance, they also
他们还展示了修改下巴和颚骨的可能性
demonstrate the possibility of modifying the chin and the jawbone.
在面肌麻痹的方面
They even have some result in simulating the effect of Bell’s palsy, which is the paralysis
他们甚至模拟了贝尔麻痹的一些效果
of facial muscles on one side.
相信不久 我们有关疾病方面的内容也会越来越受关注 如果您喜欢这期内容 请您支持我们
While we’re at this high note of illnesses, if you enjoyed this episode and would like
您就可以很快获得在Patreon上观看所有剧集
to support us, you can pick up really cool perks like early access for all of these episodes
的特权了
on Patreon.
您可以在视频说明中看到链接
The link is available in the video description.
感谢您的观看和大力支持 我们下期再见!
Thanks for watching and for your generous support, and I’ll see you next time.

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视频概述

针对人脸利用几何学等驱动面部肌肉,合成动画。

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