로그인시 본인확인과정이 필요할 수 있습니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기
| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0327426 (1994-10-21) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 550 인용 특허 : 0 |
An identification code signal is impressed on a carrier to be identified (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned and the carrier thereby identified. The method and apparatus are characterized by robustness desp
An identification code signal is impressed on a carrier to be identified (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned and the carrier thereby identified. The method and apparatus are characterized by robustness despite degradation of the encoded carrier, and by holographic permeation of the identification signal throughout the carrier. An exemplary embodiment is a processor that embeds the identification signal onto a carrier signal in real time.
[ I claim:] [1.] A steganographic method that includes changing values of input pixels corresponding to an input two-dimensional image to encode an N-bit auxiliary data signal therein, thereby yielding encoded output pixels defining an encoded output image, N being at least two, the method character
[ I claim:] [1.] A steganographic method that includes changing values of input pixels corresponding to an input two-dimensional image to encode an N-bit auxiliary data signal therein, thereby yielding encoded output pixels defining an encoded output image, N being at least two, the method characterized as follows:a difference between the output image and the input image yields a two-dimensional frame of difference data, each difference datum corresponding to an input pixel;each bit of the N-bit auxiliary data signal corresponds to a plurality of said input pixels;there exists first and second input pixels, each having the same value and each encoded by a same bit of the auxiliary data signal, where a difference datum corresponding to the first input pixel is positive, and a difference datum corresponding to the second input pixel is negative; andthere exists third and fourth input pixels, each encoded by a same bit of the auxiliary data signal, for which a value of the third input pixel is greater than a value of the fourth input pixel by a first ratio in excess of 1.0, and an absolute value of a difference datum corresponding to the third input pixel is greater than an absolute value of a difference datum corresponding to the fourth input pixel by a second ratio, where said second ratio is less than the first ratio, and the absolute value of the difference datum corresponding to the fourth input pixel is greater than zero.
Copyright KISTI. All Rights Reserved.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.