Nippon Telegraph and Telephone Corporation

Masayoshi Chikada

Atsushi Nakadaira

Shigeru Fujimura

Shigenori Ohashi

Tatsuro Ishida

Hiroki Watanabe

Kota Hidaka

Megumi Isogai

Junichi Kishigami

Hiromu Miyashita

Upon receiving a usage request that includes a file identifier and a version identifier from a user terminal, a control servertransmits a file request that is based on the usage request to a file management system, and transmits a permission information request that is based on the usage request to a distributed ledger system. Upon receiving the file request, the file management system acquires the file that corresponds to the combination of the file identifier and the version identifier and transmits the file to the control server. Upon receiving the permission information request, the distributed ledger system acquires permission information that corresponds to the combination of the file identifier and the version identifier from a distributed ledger, and transmits the permission information to the control server. The control servertransmits the file to the user terminalif the user of the user terminal has viewing permission based on the permission information.

Control server for sharing data using distributed ledger, data sharing system with distributed ledger, and control program for sharing data with distributed ledger

Content data is registered in a file management system, an identifier of a user in the file management system is registered in blockchain data, and a right-holder terminal includes a permission request receiving unit that receives, from the file management system, permission request data for the content including an identifier of the user, a verification unit that verifies that the identifier of the user registered in the blockchain data corresponds to the identifier of the user included in the permission request data, and an permission issuing unit that transmits, to the file management system, permission data for permitting a use of the content by the user.

Right-holder terminal, user terminal, and content usage method

A proprietor terminal stores state data in which an identifier of a contract executed in a blockchain system, a hash value of control target file data that specifies content data managed by the contract, and an identifier of a proprietor and an identifier of a user of the content data in the file management system are associated with one another, and includes a route object generation unit that generates reference destination data having the identifier of the contract and generates route object data having the reference destination data and a link name and the hash value of the control target file data.

Proprietor terminal, user terminal, and new proprietor terminal

Provided is a panoramic video composition apparatus that suppresses a double image or a defect of an object even when the object moves to traverse an overlap region between cameras. In a panoramic video composition apparatus that composes a panoramic video by coupling a plurality of videos, the panoramic video composition apparatus includes an afterimage generation unitconfigured to acquire a background image as a background and a reference image as a reference of the panoramic video from frame images constituting a video for each of videos from different angles of view, extract moving regions in which an object moves from differences between the background image and the frame images, and generate an afterimage by overlapping the extracted moving regions in order of the frame images, a feature point calculation unitconfigured to obtain a plurality of feature points from each of the reference image and the afterimage, generate a set of feature points by adding the feature points, and calculate a feature value of each feature point, and a transformation parameter generation unitconfigured to search for feature points of which feature values match each other by comparing the feature points of the set of feature points before and after the frame image, and generate a first transformation parameter indicating a degree of distorting the frame image from differences between coordinates of the feature points.

Panoramic image synthesis device, panoramic image synthesis method and panoramic image synthesis program

A settlement system includes a service provider devicewhich transmits a template information transaction including a template of a transaction to a networkof a first blockchain, a user device which transmits, to the networkof the first blockchain, a payment information transaction that includes an electronic signature generated by using the template of the transaction and a payment amount, and a smart contract, wherein the smart contractverifies the electronic signature by using the payment amount and the template of the transaction, the service provider devicegenerates a settlement transaction by using the template of the transaction, the electronic signature and the payment amount, and transmits the settlement transaction to a networkof a second blockchain, a plurality of output conditions are set to the template of the transaction, and the settlement transaction becomes usable when any one of the plurality of output conditions is satisfied.

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Yokosuka, Japan

Masayoshi Chikada