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Paper Abstract and Keywords
Presentation 2021-08-25 13:25
Extraction of watermarks from video frames by using BSS
Akane Yokota, Masaki Kawamura (Yamaguchi Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) We propose a method for extracting watermarks additively
embedded in video frames by using blind source separation (BSS).
Conventional additive embedding methods require the original
signal during decoding.
A video consists of a sequence of multiple still images, and
similarity between successive frames is high.
By using the similarity between frames and the BSS technique,
we show that the proposed method can perform blind decoding.
After separating the original signal and the watermark
from the stego-frames by BSS,
it is necessary to identify the frame containing
the watermark from the separated signals.
We propose a method to identify watermarked frames based on
correlation.
We embedded a binary image, or logo, into frames as a watermark.
Since the embedding strength $¥beta$ affects the quality of video
and the bit error rate (BER) of the estimated image, the PSNR for
stego-frames and BER for the image were evaluated.
In the case that the strength was weak, the PSNR was over
$47~¥mathrm{dB}$, but the BER was $0.3$ at maximum.
In the case of strong strength,
the PSNR was $30$ to $42~¥mathrm{dB}$ and the BER was less than $0.1$.
As a result, the embedding strength of $¥beta=0.02$ was recommended,
which achieved $¥mathrm{PSNR}>42~¥mathrm{dB}$ and $¥mathrm{BER}<0.1$.
Keyword (in Japanese) (See Japanese page) 
(in English) digital watermarking / blind source separation / video / / / / /  
Reference Info. ITE Tech. Rep.
Paper #  
Date of Issue  
ISSN Print edition: ISSN 1342-6893  Online edition: ISSN 2424-1970
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Conference Information
Committee IEICE-LOIS IEICE-EMM IEICE-IE IEE-CMN ME IPSJ-AVM  
Conference Date 2021-08-25 - 2021-08-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To IEICE-EMM 
Conference Code 2021-08-ME-EMM-IE-LOIS-CMN-AVM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Extraction of watermarks from video frames by using BSS 
Sub Title (in English)  
Keyword(1) digital watermarking  
Keyword(2) blind source separation  
Keyword(3) video  
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1st Author's Name Akane Yokota  
1st Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
2nd Author's Name Masaki Kawamura  
2nd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
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Speaker
Date Time 2021-08-25 13:25:00 
Presentation Time 25 
Registration for IEICE-EMM 
Paper #  
Volume (vol) ITE-45 
Number (no)  
Page  
#Pages ITE- 
Date of Issue  


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