overview on concepts, models, and libraries for object detection

1. 1
深度學習及物體檢測
(Deep Learning and Object Detection)
fangkuoyu@gmail.com
08/24/2018

2. 圖像分類及物體檢測
2
image
classification
object
detection
Source: https://github.com/kjw0612/awesome-deep-vision

3. 圖像分類及物體檢測
3
Source: Hardware Architectures for Deep Neural Network (MIT) and
Convolutional Neural Networks for Visual Recognition (Stanford)

4. Simple Shape Detection
4
40,000 training data
10,000 test data
Source: https://towardsdatascience.com/object-detection-with-neural-networks-
a4e2c46b4491

5. Bounding Boxes as Labels
5
• x: x-axis
• y: y-axis
• w: width
• h: height
(4,4,1,3) (2,3,3,2) (4,4,3,3) (0,2,2,2)
Source: https://towardsdatascience.com/object-detection-with-neural-networks-
a4e2c46b4491

6. Intersection over Union (IoU)
6
Source: https://www.pyimagesearch.com/2016/11/07/intersection-over-union-iou-for-
object-detection/

7. Different Shapes and Colors
7
Source: https://towardsdatascience.com/object-detection-with-neural-networks-
a4e2c46b4491

8. Box/Shape/Color as Labels
8
Source: https://towardsdatascience.com/object-detection-with-neural-networks-
a4e2c46b4491
• Box
- (x, y, w, h)
• Shape
- 0: rectangle
- 1: circle
- 2: triangle
• Color
- 0: red
- 1: green
- 2: blue

9. Box/Shape/Color as Labels
9
Source: https://towardsdatascience.com/object-detection-with-neural-networks-
a4e2c46b4491
• Box
- (x, y, w, h)
• Shape
- 0: rectangle
- 1: circle
- 2: triangle
• Color
- 0: red
- 1: green
- 2: blue
classification
regression

10. Advanced Detection Models
10
Source: https://www.slideshare.net/xavigiro/hierarchical-object-
detection-with-deep-reinforcement-learning

11. SSD and YOLO
11Source: https://arxiv.org/pdf/1512.02325.pdf

12. General Detection Framework
12
Source: http://openaccess.thecvf.com/content_cvpr_2017/poster/
3562_poster.pdf

13. Speed/Accuracy Tradeoffs
13Source: https://arxiv.org/abs/1611.10012

14. Deep Learning Software
14Source: https://www.svds.com/getting-started-deep-learning/

15. Object Detection Library (1/3)
15Source: https://github.com/tensorflow/models/tree/master/research/object_detection

16. Object Detection Library (2/3)
16Source: https://github.com/OlafenwaMoses/ImageAI

17. Object Detection Library (3/3)
17
OpenCV 3.4.1 Deep Neural Network Module

18. Preference and Confidence
18
Missing Tom Cruise?!Missing the bad guy?!

19. Preference and Confidence
19

20. Preference and Confidence
20
?! no change ?!

21. Preference and Confidence
21
aggressive ?! conservative ?!

22. From Tom Cruise to James Bond
22Source: https://m.youtube.com/watch?v=VOC3huqHrss
real-time detection on video file and live camera

23. 23
深度學習及物體檢測
(Deep Learning and Object Detection)
fangkuoyu@gmail.com
08/24/2018