The Journal of the Korea Contents Association (한국콘텐츠학회논문지)

The Korea Contents Association (한국콘텐츠학회)
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Improved Watermark Embbeding Algorithm Using Directional Prediction and Bilinear Interpolation

방향성 예측과 양선형 보간을 이용한 향상된 워터마크 삽입 방법

  • Received : 2014.04.21
  • Accepted : 2014.07.10
  • Published : 2014.08.28
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Abstract

The proposed watermark embedding algorithm uses histogram of difference image between a modified original image and predicted image. To increase the prediction performance of the predicted image, the reference pixels for prediction are adaptively selected and the other pixels are directionally interpolated with the reference pixels. The simulation result shows that the proposed algorithm gives good performances in the embedding capacity and the PSNR values.

본 논문에서는 예측영상을 생성하고 예측영상과 원본영상 사이의 차분영상의 히스토그램을 이용하여 워터마크를 삽입하는 알고리즘을 제안한다. 제안하는 알고리즘은 예측영상의 예측성능을 향상시키기 위해 적응적으로 참조 픽셀을 선택하였다. 선택된 참조픽셀은 양선형 보간과 방향성 예측을 통해 나머지 픽셀들을 예측하는데 이용된다. 실험결과 PSNR의 증가와 많은 워터마크 삽입량을 확인할 수 있었다.

Keywords

References

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