1. DC Image Extraction and Shot Segmentation
Elective Element
DC Image Extraction and Shot Segmentation
11/27/2018
ENEE631 Course Project

2. Shot Segmentation First Step in Video Content Analysis
‘Shot’ - unbroken sequence each with consistent content
Shot Segmentation => Transition Detection
Transitions can be ‘Abrupt’ or ‘Gradual’’
11/27/2018
ENEE631 Course Project

3. Types of Transitions Fade Disslove Wipe Cut 11/27/2018
11/27/2018
ENEE631 Course Project

4. DC image extraction
Shot Segmentation can be done in compressed domain(MPEG stream)
DC Image Extraction
No need for full frame decomposition
Less Computation since we are working on the DC frame
DC image is not sensitive to small noisy motion
11/27/2018
ENEE631 Course Project

5. DC Image Extraction I frame - DC coefficient P frame 11/27/2018
M. Wu, W. Wolf, B. Liu, "An Algorithm for Wipe Detection",  ICIP'98, Chicago, 1998
11/27/2018
ENEE631 Course Project

6. Results
11/27/2018
ENEE631 Course Project

7. DC Frame 1-8
11/27/2018
ENEE631 Course Project

8. Transition Detection Cut Detection Successive Pixel level differences
Let be two frames
"Rapid Scene Analysis on Compressed Videos", B.L. Yeo and B. Liu, IEEE Trans. Cir. Sys. Video Technology , December 1995.
11/27/2018
ENEE631 Course Project

9. Wipe Detection Implemented Vertical wipe detection
Project to 1-D pixelwise luminance difference between two frames
Compute the sample standard deviation
11/27/2018
ENEE631 Course Project

10. Wipe Detection-A new Algo
Compute the pixelwise difference between two frames
Calculate mean of the difference frame
Threshold frame is calculated using
11/27/2018
ENEE631 Course Project

11. New Algo-Contd…
The framesum is calculated according to the expected length of transition (say N frames)
The variance of Fsum from the ideal frame is calculated as
gives a peak at the frame where a wipe transition begins.
11/27/2018
ENEE631 Course Project

12. Results Generated our own vertical wipe sequence 11/27/2018
ENEE631 Course Project

13. Thresholded frame differences
11/27/2018
ENEE631 Course Project

14. Results
11/27/2018
ENEE631 Course Project

15. Further scope Testing for different types of wipes
Fine tuning of parameters
11/27/2018
ENEE631 Course Project

16. Summary Elective DC image extraction CUT detection Wipe Detection
Variance method
New method
11/27/2018
ENEE631 Course Project