초록 ▼

A steganographic method embeds hidden information like digital watermarks and digital fingerprints into an image by applying one or more zero-mean patches to a digital signal that conveys the image. Each zero-mean patch comprises elements having an average value substantially equal to zero. A copyri

A steganographic method embeds hidden information like digital watermarks and digital fingerprints into an image by applying one or more zero-mean patches to a digital signal that conveys the image. Each zero-mean patch comprises elements having an average value substantially equal to zero. A copyright protection system is implemented by selecting one or more zero-mean patches in pseudo-random fashion, modifying the patches by perturbing their elements in pseudo-random fashion, and applying the patches to image pixels at locations that are selected in pseudo-random fashion. The copyright protection system further includes a procedure for checking for the presence of a watermark in a digital signal.

대표청구항 ▼

A steganographic method embeds hidden information like digital watermarks and digital fingerprints into an image by applying one or more zero-mean patches to a digital signal that conveys the image. Each zero-mean patch comprises elements having an average value substantially equal to zero. A copyri

A steganographic method embeds hidden information like digital watermarks and digital fingerprints into an image by applying one or more zero-mean patches to a digital signal that conveys the image. Each zero-mean patch comprises elements having an average value substantially equal to zero. A copyright protection system is implemented by selecting one or more zero-mean patches in pseudo-random fashion, modifying the patches by perturbing their elements in pseudo-random fashion, and applying the patches to image pixels at locations that are selected in pseudo-random fashion. The copyright protection system further includes a procedure for checking for the presence of a watermark in a digital signal. nt reproduction job. ta to form an image of selected interfaces; ceding priority to a plurality of control programs in course of collecting said data; protecting real-time operation of the computer-controlled operation from the operation of collecting data; implementing run-time encapsulation to isolate the task of collecting data from the plurality of control programs; copying said data to a reserved memory; and analyzing said data for faults and/or sub-optimal performance. psal, 356/445; US-5159412, 19921000, Willenborg et al., 356/445; US-5181080, 19930100, Fanton et al., 356/381; US-5228776, 19930700, Smith et al., 374/005; US-5408327, 19950400, Geiler et al., 356/432; US-5657754, 19970800, Rosencwaig, 128/633; US-5978074, 19991100, Opsal et al., 356/364; US-6191846, 20010200, Opsal et al., 356/364; US-6320666, 20011100, Opsal et al., 356/237.5