| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_79b5f9d76648dfc226a261cfb970de9c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1df6fe126d8d50613529733156da83ef
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_591caafc39d8b08c4a6f904b221f3ae1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b537a4f517a36911c2e2f8061ff52da4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8aa512f2e01d5778c8922898f9cd171a |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G06T2201-0051 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N1-32256
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G06T1-0028
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G06T1-0021 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G06K15-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N1-405 |
| filingDate |
2011-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2015-03-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c95546514fe815f504ebb37b4709619d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7b5f5e16fc1375e6e59c0cd78782d0df
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f892a9ef19be23ecfe7c3374d01eaeec
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_93d83baadc2f27c6be064c95167c6dd9 |
| publicationDate |
2015-03-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-8970910-B2 |
| titleOfInvention |
Visible and invisible watermarking of printed images via 2nd generation stochastic seed frequency modulation |
| abstract |
As set forth herein, computer-implemented methods and systems facilitate watermarking documents and/or images using 2 nd generation stochastic halftoning. The watermark is used to spatially vary the gray level at which a frequency modulation-to-amplitude modulation transition occurs. The encoding algorithm uses as inputs a contone image and a watermark. The visibility of the watermark is controlled by the magnitude of the difference between the AM-to-FM transition threshold values. |
| priorityDate |
2011-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |