清空筛选条件
清空筛选条件

how to detect smile of a person ??

14 次查看（过去 30 天）
Sivakumaran Chandrasekaran
how to detect the smile of the person. whats the technology involved behind this??
  6 个评论
显示 4更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Babak
Babak 2012-8-22
First you got to detect the line between the lips. After that you need to compute the arc angle of that line if it is caved towards up or down making the person look sad or happy. To detect a line in an image you can see the DEMO that involves finding the lines of the street's cars' lanes.

更多回答（1 个）

Image Analyst
Image Analyst 2012-8-22
Since these are patented methods, they will be explained in the patents. That's the agreement in a patent: you get exclusive right to use it for 20 years, but the public gets to know how it's done (no secrets anymore). Have you searched the patent database: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=0&f=S&l=50&d=PTXT&RS=smile&Refine=Refine+Search&Refine=Refine+Search&Query=smile+AND+camera
For just one example, US Patent 8170298: Method for detecting facial expression and repairing smile face of portrait photo
It's probably already in digital cameras. If not yet, then it will be soon.
  3 个评论
显示 1更早的评论
Walter Roberson
Walter Roberson 2012-8-22
It is in the Nikon Coolpix series of cameras for the last 2 or so years. (I have one that has the feature.)

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Face Detection 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by