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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

How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
How can I make nanorobot?
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
how can I make nanorobot?
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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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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