Search icon CANCEL
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
OpenCV 3 Blueprints

You're reading from   OpenCV 3 Blueprints Expand your knowledge of computer vision by building amazing projects with OpenCV 3

Arrow left icon
Product type Paperback
Published in Nov 2015
Publisher
ISBN-13 9781784399757
Length 382 pages
Edition 1st Edition
Tools
Arrow right icon
Toc

Table of Contents (9) Chapters Close

Preface 1. Getting the Most out of Your Camera System FREE CHAPTER 2. Photographing Nature and Wildlife with an Automated Camera 3. Recognizing Facial Expressions with Machine Learning 4. Panoramic Image Stitching Application Using Android Studio and NDK 5. Generic Object Detection for Industrial Applications 6. Efficient Person Identification Using Biometric Properties 7. Gyroscopic Video Stabilization Index

Evaluation

In this section, we will show the performance of our facial expression recognition system. In our test, we will keep the parameters of each learning algorithm the same and only change the feature extraction. We will evaluate the feature extraction with the number of clusters equaling 200, 500, 1,000, 1,500, 2,000, and 3,000.

The following table shows the accuracy of the system with the number of clusters equaling 200, 500, 1,000, 1,500, 2,000, and 3,000.

Table 1: The accuracy (%) of the system with 1,000 clusters

K = 1000

MLP

SVM

KNN

Normal Bayes

SIFT

72.7273

93.1818

81.8182

88.6364

SURF

61.3636

79.5455

72.7273

79.5455

BRISK

61.3636

65.9091

59.0909

68.1818

KAZE

50

79.5455

61.3636

77.2727

DAISY

59.0909

77.2727

65.9091

81.8182

DENSE-SIFT

20.4545

45.4545

43.1818

40.9091

Table 2: The accuracy (%) of the system with 500 clusters

K = 500

MLP

SVM

KNN

Normal Bayes

SIFT

56.8182

70.4545

75

77.2727

SURF

54.5455

63.6364

68.1818

79.5455

BRISK...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at €18.99/month. Cancel anytime