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DC Image Extraction and Shot Segmentation
Elective Element DC Image Extraction and Shot Segmentation 11/27/2018 ENEE631 Course Project
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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
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Types of Transitions Fade Disslove Wipe Cut 11/27/2018
11/27/2018 ENEE631 Course Project
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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
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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
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Results 11/27/2018 ENEE631 Course Project
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DC Frame 1-8 11/27/2018 ENEE631 Course Project
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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
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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
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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
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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
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Results Generated our own vertical wipe sequence 11/27/2018
ENEE631 Course Project
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Thresholded frame differences
11/27/2018 ENEE631 Course Project
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Results 11/27/2018 ENEE631 Course Project
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Further scope Testing for different types of wipes
Fine tuning of parameters 11/27/2018 ENEE631 Course Project
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Summary Elective DC image extraction CUT detection Wipe Detection
Variance method New method 11/27/2018 ENEE631 Course Project
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