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Definition of a lens

Lenses

A lens is a custom view of Connexions content. You can think of it as a fancy kind of list that will let you see Connexions through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to Connexions materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual Connexions member, a community, or a respected organization.

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  • Rice University ELEC 301 Projects

    This module is included inLens: Rice University ELEC 301 Project Lens
    By: Rice University ELEC 301As a part of collection:"ECE 301 Projects Fall 2003"

    Click the "Rice University ELEC 301 Projects" link to see all content affiliated with them.

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Module by: Sivakiran Nagisetty. E-mail the author

User rating (How does the rating system work?)
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Summary: Results from the testing

Using the Matlab command ginput to isolate the mouth from an image and then performing tests to detect mood we had the following results.

Table 1: Results with user defined cropping
Subject # Input Sequence Output Accuracy
Subject 1 Angry, Happy, Sad, Surprised Angry, Happy, Sad, Surprised 100%
Subject 2 Happy, Surprised, Sad, Angry Happy, Surprised, Sad, Angry 100%
Subject 3 Surprised, Sad, Angry, Happy Surprised, Sad, Angry, Happy 100%
Subject 4 Sad, Happy, Surprised, Angry Angry, Happy, Surprised, Sad 50%
Subject 5 Angry, Happy, Sad, Surprised Angry, Happy, Sad, Surprised 100%
Subject 6 Happy, Surprised, Sad, Angry Happy, Surprised, Sad, Angry 100%
Subject 7 Surprised, Sad, Angry, Happy Surprised, Sad, Angry, Happy 100%
Subject 8 Sad, Happy, Surprised, Angry Sad, Surprised, Happy, Angry 50%
Subject 9 Angry, Happy, Sad,Surprised Angry, Happy, Sad,Surprised 100%
Subject 10 Happy, Surprised,Sad, Angry Happy, Surprised,Sad, Angry 100%
Subject 11 Surprised, Sad, Happy, Angry Surprised, Angry, Happy, Sad 50%
Subject 12 Sad, Happy, Surprised, Angry Angry, Happy, Surprised, Sad 50%

We then ran the test using the function goodcrop instead of doing the cropping manually using ginput. We obtained the following results

Table 2: Results using goodcrop
Subject # Input Sequence Output Accuracy
Subject 1 Angry, Happy, Sad, Surprised Angry, Happy, Sad, Surprised 100%
Subject 2 Angry, Happy, Sad, Surprised Angry, Happy, Sad, Surprised 100%
Subject 3 Angry, Happy, Sad, Surprised Sad, Happy, Angry, Surprised 50%
Subject 4 Angry, Happy, Sad, Surprised Surprised, Happy, Angry, Sad 25%
Subject 5 Angry, Happy, Sad, Surprised Angry, Happy, Sad, Surprised 100%
Subject 6 Angry, Happy, Sad, Surprised Sad, Surprised, Happy, Angry 25%
Subject 7 Angry, Happy, Sad, Surprised Angry, Happy, Sad, Surprised 100%
Subject 8 Angry, Happy, Sad, Surprised Angry, Surprised, Happy, Sad 25%
Subject 9 Angry, Happy, Sad, Surprised Angry, Happy, Sad, Surprised 100%
Subject 10 Angry, Happy, Sad, Surprised Angry, Happy, Sad, Surprised 100%
Subject 11 Angry, Happy, Sad, Surprised Angry, Happy, Sad, Surprised 100%
Subject 12 Angry, Happy, Sad, Surprised Sad, Happy, Surprised, Angry 25%

The overall accuracy of the mood detection algorithm , when using the matlab function ginput, was 83%. The overall accuracy when using the goodcrop routine was 71%.

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Rating system

Ratings

Ratings allow you to judge the quality of modules. If other users have ranked the module then its average rating is displayed below. Ratings are calculated on a scale from one star (Poor) to five stars (Excellent).

How to rate a module

Hover over the star that corresponds to the rating you wish to assign. Click on the star to add your rating. Your rating should be based on the quality of the content. You must have an account and be logged in to rate content.

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My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections directly in Connexions. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need a Connexions account to use 'My Favorites'.

| A lens (?)

Definition of a lens

Lenses

A lens is a custom view of Connexions content. You can think of it as a fancy kind of list that will let you see Connexions through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to Connexions materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual Connexions member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

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