Watermark Competition
The third watermark competition had been conducted under the evaluation criteria disclosed by the IHC committee. There were 4 submissions for image, 1 submission for video, and 1 submission for audio. Their evaluation results were revealed at the session "Watermark Competition" of IWIHC2014.



The detail of the competition is explained below.

The deadline of the submission for the second watermark competition was Feb. 21, 2014. Among the submitted schemes, the IHC committee certified granted schemes for each categories at the session "Watermark Competition" of IWIHC2014.

Image category:  4 submissions, 4 granted schemes

Highest Image Quality:

• 1st (47.141)
  Digital Watermarking Method Using LDPC Code for Clipped Image
  Nobuhiro Hirata and Masaki Kawamura (Yamaguchi University, Japan)
• 2nd (44.4874945)
  DCT-OFDM Based Watermarking Scheme Robust against Clipping Attack
  Masaki Hakka, Minoru Kuribayashi and Masakatu Morii (Kobe University, Japan)
• 3rd (41.346)
  Salt-and-Pepper Image Watermarking System for IHC Evaluation Criteria
  Hironobu Tozuka (Osaka University, Japan), Maki Yoshida (National Institute of Information and Communications Technology, Japan) and Toru Fujiwara (Osaka University, Japan)
• 4th (34.2448)
  Watermarking Based on the Difference of Discrete Cosine Transform Coefficients and an Error-Correcting Code
  Hyunho Kang and Keiichi Iwamura (Tokyo University of Science, Japan)

(Each number in the above bracket is PSNR[dB])

Highest Tolerance:

• 1st (0.461)
  Salt-and-Pepper Image Watermarking System for IHC Evaluation Criteria
  Hironobu Tozuka (Osaka University, Japan), Maki Yoshida (National Institute of Information and Communications Technology, Japan) and Toru Fujiwara (Osaka University, Japan)
• 2nd (1.334)
  Digital Watermarking Method Using LDPC Code for Clipped Image
  Nobuhiro Hirata and Masaki Kawamura (Yamaguchi University, Japan)
• 3rd (1.62793)
  DCT-OFDM Based Watermarking Scheme Robust against Clipping Attack
  Masaki Hakka, Minoru Kuribayashi and Masakatu Morii (Kobe University, Japan)
• 4th (1.90)
  Watermarking Based on the Difference of Discrete Cosine Transform Coefficients and an Error-Correcting Code
  Hyunho Kang and Keiichi Iwamura (Tokyo University of Science, Japan)

(Each number in the above parenthesis is compression ratio [%] of 2nd compression)

Video category:  1 submission, 1 granted scheme

1. Robust Video Watermarking for MPEG Compression and DA-AD Conversion
   Jong-Uk Hou, Jin-Seok Park, Do-Guk Kim, Seung-Hun Nam and Heung-Kyu Lee (KAIST, Korea)

Audio category:  1 submission, no granted scheme

There was no granted scheme.