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We initially began to explore two different methods of detecting emotions from images of faces. The first, more traditional method takes the top down approach classifying all the different facial expressions associated with emotion and what combinations or patterns of these correspond to specific emotions. Then the program looks for these specific expressions and based on what it sees tries to match these expressions to an emotion based on the given classification system. One example of such a prominently used classification is the Facial Action Coding System (FACS) developed in the 70s to taxonomize human facial expressions. This has the advantages of being quick and relatively easy to implement, but it also suffers from a lack of robustness and has a hard time dealing with different types of faces. Many animators and others use this type of approach, but in the end we decided that for the purposes of our project and our goal of a broad based emotion detector this was not the method for us.

The second method, on the other hand, involves using one of the key capabilities that computers have that humans don't – the ability to quickly intake and analyze large amounts of data – and this was one of the main reasons that we chose it. While the first method involved first coming up with a classification system a priori and then applying it to faces, the second method first 'trains' the program with a large database of images, each image coming with an associated label that indicates what emotion the face is expressing, and then the program is ready to analyze new faces and detect emotions. This approach has the obvious advantage of not requiring any kind of 'given' knowledge or rules – simply working with the provided data. It is uniquely robust, because the algorithm can be continually improved by giving the program more training images and it can very easily be tailored to specific situations of lighting or setting by training it with images with those specific attributes. Furthermore, depending on what you train it with, it could be made to work best only with specific types or groups of people or with a broad range of people. Theoretically, given enough data and time, this type of program should be able to be much more accurate and robust than a human at detecting emotion because it utilizes one of the main strengths of computing relative to the human brain.

Questions & Answers

who was the first nanotechnologist
Lizzy Reply
technologist's thinker father is Richard Feynman but the literature first user scientist Nario Tagunichi.
Norio Taniguchi
I need help
anyone have book of Abdel Salam Hamdy Makhlouf book in pdf Fundamentals of Nanoparticles: Classifications, Synthesis
Naeem Reply
what happen with The nano material on The deep space.?
pedro Reply
It could change the whole space science.
the characteristics of nano materials can be studied by solving which equation?
sibaram Reply
plz answer fast
synthesis of nano materials by chemical reaction taking place in aqueous solvents under high temperature and pressure is call?
hydrothermal synthesis
how can chip be made from sand
Eke Reply
is this allso about nanoscale material
are nano particles real
Missy Reply
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
where is the latest information on a no technology how can I find it
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
has a lot of application modern world
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
STM - Scanning Tunneling Microscope.
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Source:  OpenStax, Elec 301 projects fall 2011. OpenStax CNX. Jun 18, 2012 Download for free at http://cnx.org/content/col11431/1.1
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