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Facial-Expression-Recognition-2019

這個專題利用fer2013資料集(from kaggle)訓練CNN.

資料集介紹

  • 解析度為48×48的灰階圖片.
  • 預先劃分成一個訓練集與兩個測試集.
  • 總共7個類別,Angry、Disgust、Fear、Happiness、Sadness、Surprise、Neutral.
    number of data in a predefined data set

資料預處理

# 說明 圖片
1 對訓練集做資料清洗,將不包含人臉的圖片過濾 clean
2 利用Dlib預先訓練好的人臉偵測器完成過濾. detector
3 訓練集過濾後各類別的資料數量. after cleaning
4 利用直方圖均衡化對圖片灰階完成歸一化. histogram equalization
5 透過將原本圖片放大至70 × 70的長寬尺寸,然後對齊圖片四個角落和中間位置剪裁出48 × 48的圖片大小. cropping
6 利用對圖片的小角度旋轉增強網路對人臉角度的適應性. rotation

CNN模型

Layer Output Shape Activate Function/Kernel Size/Stride Drop Rate
Input (48,48,1) N.A. N.A.
2D-Convolution (46,46,64) Relu/(3,3)/(1,1) N.A.
2D-Convolution (46,46,64) Relu/(3,3)/(1,1) N.A.
Batch Normalization (46,46,64) N.A. N.A.
Max pooling (23,23,64) N.A./(2,2)/(2,2) N.A.
2D-Convolution (23,23,128) Relu/(3,3)/(1,1) N.A.
Batch Normalization (23,23,128) N.A. N.A.
2D-Convolution (23,23,128) Relu/(3,3)/(1,1) N.A.
Batch Normalization (23,23,128) N.A. N.A.
Max pooling (11,11,128) N.A./(2,2)/(2,2) N.A.
2D-Convolution (11,11,256) Relu/(3,3)/(1,1) N.A.
Batch Normalization (11,11,256) N.A. N.A.
2D-Convolution (11,11,256) Relu/(3,3)/(1,1) N.A.
Batch Normalization (11,11,256) N.A. N.A.
Max pooling (5,5,256) N.A./(2,2)/(2,2) N.A.
2D-Convolution (5,5,512) Relu/(3,3)/(1,1) N.A.
Batch Normalization (5,5,512) N.A. N.A.
2D-Convolution (5,5,512) Relu/(3,3)/(1,1) N.A.
Batch Normalization (5,5,512) N.A. N.A.
Max pooling (2,2,512) N.A./(2,2)/(2,2) N.A.
Flatten 2048 N.A. N.A.
Fully-Connected 512 Relu 0.4
Fully-Connected 256 Relu 0.4
Fully-Connected 128 Relu 0.4
Fully-Connected 7 Softmax N.A.

Total Parameters:5,905,863

訓練過程

training

特徵圖可視化

feature

模型表現

pu pr

實際應用

single4 pair2

triple4 group

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graduate project in 2019 Summer

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