A summary of HOG

1. Histograms of oriented gradients
2014/08/22
ked

2. Authors
 Navneet Dalal and Bill Triggs

3. Authors
 Navneet Dalal
 A founder of Flutter
 (A gesture recognition startup company created in
2010)

4. Authors
 Navneet Dalal
 A founder of Flutter
 (A gesture recognition startup created in 2010)

5. Overview – HOG

6. Gradient

7. Cell & block
 Cell
 8 x 8 pixels
 Block
 2 x 2 cells
 50% overlap for neibhbors

8. Example
 For a 64 x 128 image

9. Quantization

10. Parameters – bins

11. Parameters – cell & blcok

12. Histogram normalization

13. Feature description

14. Compare to SIFT
-- by authors

15. SVM weight

16. Thx.