A Study on Adaptive Information Hiding Technique for Copyright Protection of Digital Images

디지털 영상물의 저작권 보호를 위한 적응적 정보 은닉 기술에 관한 연구

  • 박강서 (연세대학교 전기공학과) ;
  • 정태윤 (삼성 전자 기술총괄) ;
  • 오상록 (한국과학기술 연구원 지능제어연구센터) ;
  • 박상희 (연세대학교 전기공학과)
  • Published : 1998.07.20


Digital watermarking is the techinque which embeds the invisible signal into multimedia data such as audio, video, images, for copyright protection, including owner identification and copy control information. This paper proposes a new watermark embedding and extraction technique by extending the direct sequence spread spectrum technique. The proposed technique approximates the frequency component of pixels in spatial domain by using Laplacian mask and adaptively embeds the watermark considering the HVS to reduce the degradation of Image. In watermark extraction process, the proposed technique strengthens the high frequency components of image and extracts the watermark by demodulation. All this processes are performed in spatial domain to reduce the processing time.