# US 2021/0279468 A1 · Image display system, terminal, method, and program for determining a difference between a first image and a second image > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0279468 A1 - Document ID: US20210279468A1 - Status: Published application - Kind: A1 - Application number: 17/329,787 - Filed: 2021-05-25 - Published: 2021-09-09 - Earliest claimed: 2016-03-24 - Assignees: NEC Corpo - Applicants: NEC Corporation - Inventors: Shizuo Sakamoto - Web page: https://patentgrep.com/patent/US20210279468A1 ## CPC - G06V 20/00: Scenes; Scene-specific elements (control of digital cameras H04N23/60) - G06F 1/1686: {the I/O peripheral being an integrated camera} - G06F 16/587: using geographical or spatial information, e.g. location - G06V 20/20: in augmented reality scenes - G06V 20/52: Surveillance or monitoring of activities, e.g. for recognising suspicious objects (recognising microscopic objects G06V20/69) - H04N 23/80: Camera processing pipelines; Components thereof - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract The present invention provides an image display system, a terminal, a method, and a program that can quickly and accurately display an image corresponding to a particular location. An image display system according to one example embodiment of the present invention includes: a current image acquisition unit configured to acquire a first image captured by a mobile terminal; an information acquisition unit configured to acquire information including a position and an orientation of the mobile terminal that has captured the first image; a past image acquisition unit configured to acquire a second image based on the position and the orientation of the mobile terminal and a position and an orientation associated with the second image stored in the past in a storage device; and a difference detection unit configured to detect a difference between the first image and the second image. ## Claims ### Claim at position 1 1-12. (canceled) ### Claim 13 An image display system comprising: at least one memory configured to store computer program code and a first image, the first image being associated with a first position where a mobile terminal captured the first image; and at least one processor configured to execute the computer program code to: acquire the first image and a current position of the mobile terminal; and cause a display device to display the current position and a marker which indicates the first position. ### Claim 14 (depends on 13) The image display system according to claim 13, wherein the at least one processor is further configured to execute the computer program code to: cause the display device to display the marker which indicates the first position within a predetermined distance from the current position. ### Claim 15 (depends on 14) The image display system according to claim 14, wherein the at least one processor is further configured to execute the computer program code to: acquire a second image captured by the mobile terminal; acquire information including a second position and a second orientation of the mobile terminal that has captured the second image; acquire the first image based on the information, the first position, and a first orientation associated with the first image stored in the memory; detect a difference between the first image and the second image after the first image is acquired; and output a notification based on the difference between the first image and the second image. ### Claim 16 (depends on 15) The image display system according to claim 15, wherein the at least one processor is further configured to execute the computer program code to: calculate a similarity degree indicating resemblance of the second position and the second orientation of the mobile terminal to the first position and the first orientation associated with the first image, wherein the first image is acquired based on the similarity degree. ### Claim 17 A method performed by a computer including at least one memory configured to store computer program code and a first image, the first image being associated with a first position where a mobile terminal captured the first image; and at least one processor configured to execute the computer program code, the method comprising: acquiring the first image and a current position of the mobile terminal; and causing a display device to display the current position and a marker which indicates the first position. ### Claim 18 (depends on 17) The method according to claim 17 further comprising: causing the display device to display the marker which indicates the first position within a predetermined distance from the current position. ### Claim 19 (depends on 18) The method according to claim 18 further comprising: acquiring a second image captured by the mobile terminal; acquiring information including a second position and a second orientation of the mobile terminal that has captured the second image; acquiring the first image based on the information, the first position, and a first orientation associated with the first image stored in the memory; detecting a difference between the first image and the second image after the first image is acquired; and outputting a notification based on the difference between the first image and the second image. ### Claim 20 (depends on 19) The method according to claim 19 further comprising: calculating a similarity degree indicating resemblance of the second position and the second orientation of the mobile terminal to the first position and the first orientation associated with the first image, wherein the first image is acquired based on the similarity degree. ### Claim 21 A non-transitory storage medium in which a computer program code and a first image, the first image being associated with a first position where a mobile terminal captured the first image, are stored, the computer program code being configured to cause a computer including the non-transitory storage medium and at least one processor to: acquire the first image and a current position of the mobile terminal; and cause a display device to display the current position and a marker which indicates the first position. ### Claim 22 (depends on 21) The non-transitory storage medium according to claim 21, wherein the computer program code is further configured to cause the computer to: cause the display device to display the marker which indicates the first position within a predetermined distance from the current position. ### Claim 23 (depends on 22) The non-transitory storage medium according to claim 22, wherein the computer program code is further configured to cause the computer to: acquire a second image captured by the mobile terminal; acquire information including a second position and a second orientation of the mobile terminal that has captured the second image; acquire the first image based on the information, the first position, and a first orientation associated with the first image stored in the memory; detect a difference between the first image and the second image after the first image is acquired; and output a notification based on the difference between the first image and the second image. ### Claim 24 (depends on 23) The non-transitory storage medium according to claim 23, wherein the computer program code is further configured to cause the computer to: calculate a similarity degree indicating resemblance of the second position and the second orientation of the mobile terminal to the first position and the first orientation associated with the first image, wherein the first image is acquired based on the similarity degree.