Title:
ENCRYPTION DEVICE AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2020/129681
Kind Code:
A1
Abstract:
This encryption device executes encryption by dividing an image into blocks, and is provided with: a candidate acquisition unit that acquires a plurality of provisional motion vector candidates in a block to be encrypted; an evaluation information acquisition unit that acquires corresponding vectors having the same direction and size as the acquired provisional motion vector candidates, and evaluation information of a search center indicated by the corresponding vectors in the encrypted block; and a selection unit that, on the basis of the evaluation information, selects motion vector candidates from among the plurality of provisional motion vector candidates such that the number of selected motion vector candidates is less than the number of the plurality of provisional motion vector candidates.
Inventors:
OMORI YUYA (JP)
ONISHI TAKAYUKI (JP)
IWASAKI HIROE (JP)
SHIMIZU ATSUSHI (JP)
ONISHI TAKAYUKI (JP)
IWASAKI HIROE (JP)
SHIMIZU ATSUSHI (JP)
Application Number:
PCT/JP2019/047670
Publication Date:
June 25, 2020
Filing Date:
December 05, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04N19/56
Domestic Patent References:
| WO2010086541A1 | 2010-08-05 |
Foreign References:
| JP2015111774A | 2015-06-18 | |||
| JP2014150467A | 2014-08-21 | |||
| JP2018085608A | 2018-05-31 |
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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