Electronic Science and Technology ›› 2020, Vol. 33 ›› Issue (8): 21-27.doi: 10.16180/j.cnki.issn1007-7820.2020.08.004

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Dual Color Image Watermarking Algorithm Based on QDCT and HVS

JING Zhengjun,QI Gang   

  1. Information Technology Department,Guodian Nanjing Automation Co.,Ltd.,Nanjing 210044,China
  • Received:2019-05-22 Online:2020-08-15 Published:2020-08-24
  • Supported by:
    Scientific Research Project of Safety Protection Assessment for Electric Power Monitoring System of China Huadian Corporation(HD20181277)


Aiming at the mutually restricted problem of information capacity, invisibility and robustness in watermarking, a dual color image watermarking algorithm based on QDCT and HVS was proposed. With this algorithm, a colored carrier image and a colored watermarking image were subject to QDCT. The embedding location and strength of watermarking information were decided based on the characteristics of HVS. Based on the generalized Arnold transform and redundant embedding strategy, the QDCT coefficient of the watermarking image was embedded into the real part and imaginary part of the QDCT coefficient of the carrier image. The experiment result showed with this algorithm, most of NC values of the watermark extracted under common attacks were higher than 0.95 and the watermark information possessed better invisibility and robustness for the colored watermark-embedded image when PSNR was 35 dB.

Key words: quaternion, QDCT, HVS, generalized Arnold transform, redundant embedding, dual color image watermarking

CLC Number: 

  • TN918