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러닝머신 말고 머신러닝
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2019 SK엔카 테크캠프에서 딥러닝을 주제로 발표한 자료입니다.
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러닝머신 말고 머신러닝
1.
SK
2.
Deep Learning
3.
Deep Learning y =
f(x)
4.
Deep Learning y =
f(x)
5.
Deep Learning y =
f(x)
6.
Deep Learning y =
f(x) Model
7.
Matrix Product
8.
Matrix Product [ 6 2 1
4] × [ 3 7 4 5]
9.
Matrix Product [ 6 2 1
4] × [ 3 7 4 5] = [ 26 ? ? ?]
10.
Matrix Product [ 6 2 1
4] × [ 3 7 4 5] = [ 26 52 ? ? ]
11.
Matrix Product [ 6 2 1
4] × [ 3 7 4 5] = [ 26 52 19 ? ]
12.
Matrix Product [ 6 2 1
4] × [ 3 7 4 5] = [ 26 52 19 27]
13.
Prediction
14.
Prediction [ 6 2 1 4] × [ 3
7 4 5] = [ 26 52 19 27] input Prediction
15.
Prediction [ 6 2 1 4] × [ 3
7 4 5] = [ 26 52 19 27] input PredictionModel
16.
Deep Learning y =
f(x)
17.
Prediction [ 6 2 1 4] × [ 3
7 4 5] × ⋯ × [ 4 6 1 8] = [ 26 52 19 27] input PredictionModel
18.
Prediction [ 6 2 1 4] × 0.1
0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 ⋯ 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 ⋮ ⋮ 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 ⋯ 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 −0.2 −0.8 0.6 0.1 0.9 0.3 0.9 −0.4 −0.1 0.1 0.3 0.1 0.6 0.2 0.4 0.1 0.1 0.8 = [ 26 52 19 27] input Prediction Model
19.
Prediction input Prediction Model
20.
Prediction input PredictionModel
21.
Prediction input PredictionModel
22.
Prediction - Convolutional
Neural Network
23.
Prediction - Convolutional
Neural Network
24.
Prediction - Recurrent
Neural Network
25.
Prediction - Recurrent
Neural Network
26.
Training
27.
y = f(x) Training
28.
y′ = f(x) Training
29.
y′ = f(x) Prediction
Value Training
30.
[ 6 2 1 4] × [ 3
7 4 5] = [ 26 52 19 27] input PredictionModel Training
31.
y ≠ y′ Answer
Prediction Value Training
32.
y ≠ y′ Label
Prediction Value Training
33.
[ 6 2 1 4] × [ 3
7 4 5] = [ 26 52 19 27] input PredictionModel Training
34.
[ 6 2 1 4] × [ 4
6 4 4] = [ 32 44 20 22] input PredictionModel Training
35.
[ 6 2 1 4] × [ 5
5 3 2] = [ 36 34 17 13] input PredictionModel Training
36.
[ 6 2 1 4] × [ 6
4 2 2] = [ 40 28 14 12] input PredictionModel Training
37.
y ≃ y′ Label
Prediction Value Training
38.
Loss function
39.
Training loss = L(y,
y′)
40.
Prediction [ 26 52 19 27]
[ 62 18 32 42] yy′
41.
[ 62 18 32 42][ 26
52 19 27] Loss function L(y, y′) = ? yy′
42.
[ 62 18 32 42] − [ 26
52 19 27] = [ 36 −34 13 −15] = 0 Loss function L(y, y′) = ∑ y − y′ y y′
43.
= (62 −
26)2 + (18 − 52)2 + (32 − 19)2 + (42 − 27)2 Loss function L(y, y′) = ∥ y − y′ ∥ = 2846 ≃ 53.3
44.
= 1 4 (62 − 26)2 +
(18 − 52)2 + (32 − 19)2 + (42 − 27)2 Loss function L(y, y′) = 1 n ∥ y − y′ ∥ = 1 4 2846 ≃ 13.3
45.
Mean Squared Error
46.
Mean Squared Error Mean
Absolute Error Cross Entropy Error Possion Error ⋮
47.
Training Model [ w0 w1 w2 w3]
L(y, y′) ?
48.
Loss ?
49.
–wikipedia (https://ko.wikipedia.org/wiki/ ) “
”
50.
“ Loss ”
51.
δL δwi wi L(y, y′) Training
52.
[ w00 w01 w02 w03] × [ w10
w11 w12 w13] 3 ∑ j=0 δL δw1j δw1j δw0i Training
53.
[ w00 w01 w02 w03] × [ w10
w11 w12 w13] × [ w20 w21 w22 w23] 3 ∑ k=0 3 ∑ j=0 δL δw2k δw2k δw1j δw1j δw0i Training
54.
Backpropagation
55.
Optimization
56.
Update weight wi =
wi − γ δL δwi
57.
Update weight wi =
wi − γ δL δwi
58.
Update weight wi =
wi − γ δL δwi Learning rate
59.
Stochastic Gradient Descent Momentum RMS
Propagation Adam ⋮
60.
y ≃ y′ Label
Prediction Value Training
61.
62.
Automation
63.
64.
65.
66.
! 2017.8~
67.
One-hot Encoding
68.
One-hot Encoding [1 0
0 0 0] [0 1 0 0 0] [0 0 1 0 0] [0 0 0 1 0] [0 0 0 0 1]
69.
70.
X One-hot Encoding [1 0] [0
1]
71.
= [1 0] or [0 1] input
PredictionModel [image] ×
72.
0~9 One-hot Encoding [1 ⋯
0] [0 ⋯ 1]~ 50
73.
input Model [image] ×
= 1 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 Prediction 50
74.
input Model [image] ×
= 1 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 Prediction 50 0
75.
input Model [image] ×
= 1 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 Prediction 50 0 8
76.
input Model [image] ×
= 1 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 Prediction 50 0 8
77.
input Model [image] ×
= 1 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 Prediction 50 0 8 6
78.
input Model [image] ×
= 1 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 Prediction 50 0 8 6 7
79.
input Model [image] ×
= 1 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 Prediction 50 0 8 6 7 2
80.
input Model [image] ×
= 1 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 0 ⋯ 0 Prediction 50 0 8 6 7 2 3
81.
82.
83.
…. 3 …
84.
85.
86.
87.
! (2018.7~)
88.
10
89.
So Easy
90.
One-hot Encoding [1 0
0 0 0 0 0 0 0 0] [0 1 0 0 0 0 0 0 0 0] [0 0 0 0 0 0 0 0 1 0] [0 0 0 0 0 0 0 0 0 1] ⋮
91.
input Prediction Model [image] × = [1
0 ⋯ 0 0] ⋮ [0 0 ⋯ 0 1]
92.
3 99%
93.
?
94.
95.
One-hot Encoding [0 0
0 0 0 0 0 0 0 0 1]
96.
“ ?”
97.
“ ”
98.
99.
input PredictionModel [image] ×
= 0 ∼ 1
100.
idea
101.
Deployment
102.
103.
104.
105.
106.
107.
Tensorflow serving
108.
109.
110.
111.
112.
113.
114.
115.
116.
Object Detection
117.
118.
YOLO FastRCNN FasterRCNN SSD
119.
‘ …!’
120.
‘ / ?’
121.
122.
123.
124.
125.
126.
‘ ?’
127.
128.
‘ ?’
129.
Prediction - Convolutional
Neural Network
130.
Transfer Learning
131.
2,000
132.
99.73% 99.81% 99.73% x 99.81%
= 99.48%
133.
Amazing!
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