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人 脸对齐技术. [email protected] 4/3/2014. detect => align => represent => classify 9-layer deep NN 120 million parameters 4 million images, 4000 identities 97.25%. 大纲. 什么是人脸对齐? 人 脸对齐的应用 - 人脸识别、表情识别、人脸动画、人脸姿态估计、视线跟踪、嘴唇跟踪、 人脸高分辨率重建、疲劳检测、人机交互、特效 ( 比如 ” 换脸 ” 、 Morphing) 等 人 脸对齐技术及其数学原理

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人 脸对齐技术

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人脸对齐技术

[email protected]

4/3/2014


detect => align => represent => classify

9-layer deep NN

120 million parameters

4 million images, 4000 identities

97.25%


大纲

  • 什么是人脸对齐?

  • 人脸对齐的应用

    - 人脸识别、表情识别、人脸动画、人脸姿态估计、视线跟踪、嘴唇跟踪、 人脸高分辨率重建、疲劳检测、人机交互、特效(比如”换脸”、Morphing)等

  • 人脸对齐技术及其数学原理

    - Active Contour Models (Snakes)

    - Active Shape Models

    - Active Appearance Models (2D、3D…)


大纲

  • 什么是人脸对齐?

  • 人脸对齐的应用

    - 人脸识别、表情识别、人脸动画、人脸姿态估计、视线跟踪、嘴唇跟踪、 人脸高分辨率重建、疲劳检测、人机交互、特效(比如”换脸”、Morphing)等

  • 人脸对齐技术及其数学原理

    - Active Contour Models (Snakes)

    - Active Shape Models

    - Active Appearance Models (2D、3D…)


人脸检测 (Face Detection)


人脸识别 (Face Recognition)


人脸对齐 (Face Alignment)


图像配准 (Registration)


大纲

  • 什么是人脸对齐?

  • 人脸对齐的应用

    - 人脸识别、表情识别、人脸动画、人脸姿态估计、视线跟踪、嘴唇跟踪、 人脸高分辨率重建、疲劳检测、人机交互、特效(比如”换脸”、Morphing)等

  • 人脸对齐技术及其数学原理

    - Active Contour Models (Snakes)

    - Active Shape Models

    - Active Appearance Models (2D、3D…)


人脸对齐的应用

  • 具体见Demos


大纲

  • 什么是人脸对齐?

  • 人脸对齐的应用

    - 人脸识别、表情识别、人脸动画、人脸姿态估计、视线跟踪、嘴唇跟踪、 人脸高分辨率重建、疲劳检测、人机交互、特效(比如”换脸”、Morphing)等

  • 人脸对齐技术及其数学原理

    - Active Contour Models (Snakes)

    - Active Shape Models

    - Active Appearance Models (2D、3D…)


Photoshop “套圈”


ACM (Snakes)


Internal Energy


Image Forces


Image Forces (cont.)


Image Forces (cont.)


ACM (Snakes)

  • 对形状没有太多约束;

  • 没有使用纹理信息。

  • 人脸形状大致固定;

  • 人脸器官以及人脸形状边缘有明显的纹理变化。


ASM Applications


Shape Training


Labeling the Training Set


Alignment


Alignment (cont.)


Aligned Shape Statistics


Face Examples


ASM Algorithm


Adjusting Model Points


Examples


ASM

  • 有2D形状模型;

  • 少量的纹理信息。

  • 怎样使用整个人脸区域内部的纹理?


PCA

Building Active Appearance Models

Warped

PCA

RI, CMU


Model Instantiation


Active Appearance Models


AAM (2D)

  • 有2D形状模型;

  • 使用了整个人脸区域的纹理信息。

  • 3D人脸形状成像时有约束。


3D Morphable Models


AnExample


Fitting with 3D Shape Constraints

AAM

K→ +∞

Parameters:

3D Shape

Constraints


小结

  • 什么是人脸对齐?

  • 人脸对齐的应用

    - 人脸识别、表情识别、人脸动画、人脸姿态估计、视线跟踪、嘴唇跟踪、 人脸高分辨率重建、疲劳检测、人机交互、特效(比如”换脸”、Morphing)等

  • 人脸对齐技术及其数学原理

    - Active Contour Models (Snakes)

    - Active Shape Models

    - Active Appearance Models (2D、3D…)


Thank You!


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