# US 10,373,459 B2 · Display control apparatus, display control method, camera system, control method for camera system, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,373,459 B2 - Document ID: US10373459B2 - Status: Granted - Kind: B2 - Application number: 14/196,204 - Filed: 2014-03-04 - Published: 2014-09-18 - Granted: 2019-08-06 - Earliest claimed: 2013-03-15 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Eiichiro Kitagawa - Web page: https://patentgrep.com/patent/US10373459B2 ## CPC - G08B 13/19645: {Multiple cameras, each having view on one of a plurality of scenes, e.g. multiple cameras for multi-room surveillance or for tracking an object by view hand-over} - G06V 20/53: {Recognition of crowd images, e.g. recognition of crowd congestion} - H04N 7/188: {Capturing isolated or intermittent images triggered by the occurrence of a predetermined event, e.g. an object reaching a predetermined position (signal generation from motion picture films H04N5/253)} - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A display control apparatus comprising: a reception unit configured to receive a detection notification indicating detection of an event by a first camera; an image obtainment unit configured to obtain a video from a second camera; and a display control unit configured to, in a case where the detection notification is received from the first camera that corresponds to detection of the event in which an occurrence position is included in the video from the second camera, display a predetermined image corresponding to the detection of the event together with the video from the second camera. ## Claims ### Claim 1 A display control apparatus comprising: an obtaining unit configured to obtain a first video captured by a first camera; a display control unit configured, in a case where an event in a second video captured by a second camera is detected by the second camera based on a state of the second video while the first video is being displayed by a display device and the second video is not being displayed by the display device, to cause the display device to display, in addition to the first video, both (a) a string of characters indicating a type of the event detected by the second camera and (b) identification information of the second camera which detected the event based on the state of the second video while the second video is not being displayed by the display device; and a reception unit configured to receive a detection notification representing that the event in the second video is detected, wherein the display control unit, in a case where the detection notification is received by the reception unit while the first video is being displayed by the display device and the second video is not being displayed by the display device, causes the display device to display, in addition to the first video, both the string and the identification information. ### Claim 2 (depends on 1) The display control apparatus according to claim 1, wherein the display control unit further causes the display device to display an image for selecting a video to be displayed by the display device, and wherein the display control unit switches, according to user operation on the image for selecting, a video displayed by the display device from the first video to another video. ### Claim 3 (depends on 1) The display control apparatus according to claim 1, further comprising: a determination unit configured to determine, according to user operation for selecting a type of event to be detected, a detection setting for detection processing to detect the event in the second video. ### Claim 4 (depends on 1) The display apparatus according to claim 1, wherein the display control unit causes the display device to display, in addition to the first video and without displaying the second video, both the string and the identification information. ### Claim 5 (depends on 1) The display control apparatus according to claim 1, wherein the string displayed by the display device represents a type of the event detected. ### Claim 6 (depends on 1) The display control apparatus according to claim 1, wherein, in a case where the event is detected by passage detection, the string displayed by the display device represents passage detection. ### Claim 7 (depends on 1) The display control apparatus according to claim 1, wherein, in a case where the event is detected by intrusion detection, the string displayed by the display device represents intrusion detection. ### Claim 8 A display control apparatus comprising: an obtaining unit configured to obtain a first video captured by a first camera; a display control unit configured, in a case where an event in a second video captured by a second camera is detected by the second camera based on a state of the second video while the first video is being displayed by a display device and the second video is not being displayed by the display device, to cause the display device to display, in addition to the first video, a predetermined image depending on a type of the event detected by the second camera which detected the event based on the state of the second video while the second video is not being displayed by the display device, wherein the predetermined image represents a position at which the event has been detected; and a reception unit configured to receive a detection notification representing that the event in the second video is detected, wherein the display control unit, in a case where the detection notification is received by the reception unit while the first video is being displayed by the display device and the second video is not being displayed by the display device, causes the display device to display, in addition to the first video, the predetermined image. ### Claim 9 (depends on 8) The display control apparatus according to claim 8, further comprising: a second obtaining unit configured to obtain a detection setting for the second camera; and a conversion unit configured to convert, based on correspondence between coordinates on the first video with coordinates on the second video, the detection setting for the second camera into a detection setting for the first camera, wherein the display control unit causes the display device to display the predetermined image at a position on the first video, wherein the position is determined based on the detection setting for the first camera. ### Claim 10 (depends on 8) The display control apparatus according to claim 8, wherein, in a case where the event is detected by intrusion detection, the predetermined image displayed by the display device includes a closed region. ### Claim 11 (depends on 8) The display control apparatus according to claim 8, wherein, in a case where the event is detected by passage detection, the predetermined image displayed by the display device includes a line segment. ### Claim 12 A display control method comprising steps of: obtaining a first video captured by a first camera; causing, in a case where an event in a second video captured by a second camera is detected by the second camera based on a state of the second video while the first video is being displayed by a display device and the second video is not being displayed by the display device, the display device to display, in addition to the first video, both (a) a string of characters indicating a type of the event detected by the second camera and (b) identification information of the second camera which detected the event based on the state of the second video while the second video is not being displayed by the display device; and receiving a detection notification representing that the event in the second video is detected, wherein the causing, in a case where the detection notification is received while the first video is being displayed by the display device and the second video is not being displayed by the display device, causes the display device to display, in addition to the first video, both the string and the identification information. ### Claim 13 (depends on 12) The display control method according to claim 12, wherein, in a case where the event is detected by passage detection, the string displayed by the display device represents passage detection. ### Claim 14 (depends on 12) The display control method according to claim 12, wherein, in a case where the event is detected by intrusion detection, the string displayed by the display device represents intrusion detection. ### Claim 15 A display control method comprising steps of: obtaining a first video captured by a first camera; causing, in a case where an event in a second video captured by a second camera is detected by the second camera based on a state of the second video while the first video is being displayed by a display device and the second video is not being displayed by the display device, the display device to display, in addition to the first video, a predetermined image depending on a type of the event detected by the second camera which detected the event based on the state of the second video while the second video is not being displayed by the display device, wherein the predetermined image represents a position at which the event has been detected; and receiving a detection notification representing that the event in the second video is detected, wherein the causing, in a case where the detection notification is received while the first video is being displayed by the display device and the second video is not being displayed by the display device, causes the display device to display, in addition to the first video, the predetermined image. ### Claim 16 (depends on 15) The display control method according to claim 15, wherein, in a case where the event is detected by passage detection, the predetermined image displayed by the display device includes a line segment. ### Claim 17 (depends on 15) The display control method according to claim 15, wherein, in a case where the event is detected by intrusion detection, the predetermined image displayed by the display device includes a closed region. ### Claim 18 A non-transitory computer-readable storage medium storing a computer program for controlling a computer, the computer program executing a method that comprises steps of: obtaining a first video captured by a first camera; causing, in a case where an event in a second video captured by a second camera is detected by the second camera based on a state of the second video while the first video is being displayed by a display device and the second video is not being displayed by the display device, the display device to display, in addition to the first video, both (a) a string of characters indicating a type of the event detected by the second camera and (b) identification information of the second camera which detected the event based on the state of the second video while the second video is not being displayed by the display device; and receiving a detection notification representing that the event in the second video is detected, wherein the causing, in a case where the detection notification is received while the first video is being displayed by the display device and the second video is not being displayed by the display device, causes the display device to display, in addition to the first video, both the string and the identification information. ### Claim 19 A non-transitory computer-readable storage medium storing a computer program for controlling a computer, the computer program executing a method that comprises steps of: obtaining a first video captured by a first camera; causing, in a case where an event in a second video captured by a second camera is detected by the second camera based on a state of the second video while the first video is being displayed by a display device and the second video is not being displayed by the display device, the display device to display, in addition to the first video, a predetermined image depending on a type of the event detected by the second camera which detected the event based on the state of the second video while the second video is not being displayed by the display device, wherein the predetermined image represents a position at which the event has been detected; and receiving a detection notification representing that the event in the second video is detected, wherein the causing, in a case where the detection notification is received while the first video is being displayed by the display device and the second video is not being displayed by the display device, causes the display device to display, in addition to the first video, the predetermined image.