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Face Expression Classification Using Neural Network and PCA algorithm

تصنيف تعابير الوجه باستخدام شبكة عصبية وخوارزمية PCA

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 Publication date 2014
and research's language is العربية
 Created by Shamra Editor




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The purpose of this article is to shed light on the mechanism and the procedures of a program that classifies an input face into any of the six basic facial expressions, which are Anger, Disgust, Fear, Happiness, Sadness and Surprise, in addition to normal face. This program works by apply PCA- principal component analysis algorithm, which is applied of one side of the face, and depends, on contrast to the traditional studies which rely on the whole face, on three components: Eyebrows, Eyes and Mouth. Those out-value are used to determine the facial feature array as an input to the neural network, and the neural network is trained by using the back-propagation algorithm. Note that the faces used in this study belong to people from different ages and races.


Artificial intelligence review:
Research summary
يهدف هذا البحث إلى تطوير نظام خبير لتصنيف تعابير الوجه باستخدام خوارزمية تحليل المكونات الأساسية (PCA) والشبكات العصبية. يتم التركيز على ثلاثة عناصر رئيسية في الوجه وهي العين، الحاجب، والفم بدلاً من تحليل الوجه بالكامل. يتم استخراج شعاع الصفات من هذه العناصر واستخدامه كمدخل للشبكة العصبية التي تُدرّب باستخدام خوارزمية الانتشار الخلفي. تم اختبار النظام على مجموعة متنوعة من الوجوه من أعمار وأعراق مختلفة، وحقق النظام دقة تصنيف تصل إلى 91.2%، مما يجعله متفوقاً على بعض الطرق الأخرى المستخدمة في هذا المجال. تعتمد الطريقة المقترحة على تقسيم المناطق الفعالة من الوجه إلى أجزاء صغيرة لتقليل التشويش وتحسين دقة التصنيف.
Critical review
دراسة نقدية: على الرغم من أن البحث يقدم نتائج جيدة في تصنيف تعابير الوجه باستخدام خوارزمية PCA والشبكات العصبية، إلا أن هناك بعض النقاط التي يمكن تحسينها. أولاً، الاعتماد على أجزاء محددة من الوجه قد يؤدي إلى فقدان بعض المعلومات الهامة التي يمكن أن تكون موجودة في أجزاء أخرى من الوجه. ثانياً، استخدام خوارزمية PCA قد يكون محدوداً في التعامل مع البيانات غير الخطية بشكل كامل، ويمكن استكشاف تقنيات أخرى مثل خوارزميات التعلم العميق لتحسين الأداء. أخيراً، لم يتم التطرق بشكل كافٍ إلى كيفية التعامل مع الصور ذات الجودة المنخفضة أو الصور التي تحتوي على تشويش كبير، وهو ما يمكن أن يؤثر على دقة التصنيف في التطبيقات العملية.
Questions related to the research
  1. ما هي العناصر الثلاثة الرئيسية التي تم التركيز عليها في تحليل تعابير الوجه في هذا البحث؟

    العناصر الثلاثة الرئيسية هي العين، الحاجب، والفم.

  2. ما هي الخوارزمية المستخدمة لاستخلاص شعاع الصفات من الوجه؟

    الخوارزمية المستخدمة هي خوارزمية تحليل المكونات الأساسية (PCA).

  3. ما هي دقة التصنيف التي حققها النظام المقترح في هذا البحث؟

    النظام حقق دقة تصنيف تصل إلى 91.2%.

  4. ما هي خوارزمية التدريب المستخدمة في الشبكة العصبية؟

    خوارزمية التدريب المستخدمة هي خوارزمية الانتشار الخلفي.


References used
CALDER A, BURTON A, MILLER P, YOUNG A, AKAMATSU S, 2001- A principal component analysis of facial expressions. Vision Research 41 (2001) 1179–1208
DAILEY M, COTTRELL G,1999- PCA = Gabor for Expression Recognition. Computer Science and Engineering, University of California, San Diego
THAI L,NGUYEN N, HAI T, Member, IACSIT,2011- A Facial Expression Classification System Integrating Canny, Principal Component Analysis and Artificial Neural Network. International Journal of Machine Learning and Computing, Vol. 1, No. 4
GARG A, CHOUDHARY V, 2012- facial expression recognition using principal component analysis. International Journal of Scientific Research Engineering &Technology , Volume 1 Issue4, pp 039-042
GOSAVI A, KHOT S, 2013- Facial Expression Recognition Using Principal Component Analysis. International Journal of Soft Computing and Engineering (IJSCE) ISSN: 2231-2307, Volume-3, Issue-4
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