Video display system, video display method, and computer-readable medium

• US 8,948,570 B2
• Filed: 11/14/2007
• Issued: 02/03/2015
• Est. Priority Date: 12/05/2006
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Takanezawa, Tetsuhiro
• Primary Examiner(s): Poltorak, Peter
• Application Number:
  US11/939,863
• Publication Number:
  US 20080131092A1
• Time in Patent Office: 2,638 Days
• Field of Search: 386/241
• US Class Current: 386/239
• CPC Class Codes: G08B 13/19669 Event triggers storage or change of storage policy
• CPC Class Codes: G08B 13/19671 Addition of non-video data, i.e. metadata, to video stream
• CPC Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: 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

Abstract

An image capturing system that records on a video recording unit a video captured by an image capturing apparatus and displays the video thus captured on a display unit comprises a change recording unit that records information of the time when, and the region where, a change of status occurs when the change detection unit detects such a change of status, and an extraction unit that extracts a partial region of video from the video thus recorded for displaying on the display unit. The extraction unit switches the video that is displayed on the display unit by extracting a video of the region of the change of status when the imaging time of the video that is displayed on the display unit reaches a time before a time prior to change that is preset, from the time when the change of status occurs.

Claims

1. A video displaying system adapted to display a video on a terminal device, the system comprising:

an acquiring unit configured to acquire a video of an extraction area based on a designation of the extraction area within a video frame by the user, wherein a plurality of video frames are recorded by a video recording unit as a recorded video;

a first processing unit configured to perform a first control for displaying on the terminal device the video of the extraction area determined based on the designation by the user;

a detection unit configured to detect an event within the recorded video;

a determination unit configured to determine, in a case where a plurality of events are detected in a video frame of the recorded video, whether an area ratio of an event area including areas corresponding to the plurality of events and the areas corresponding to the plurality of events matches a predetermined ratio condition; and

a second processing unit configured to perform a second control for switching of the video displayed on the terminal device from the video of the extraction area to (i) a video of the event area including the areas corresponding to the plurality of events in a case where the determination unit determines that the area ratio matches the predetermined ratio condition, and to (ii) videos of at least two event areas corresponding to the plurality of events in a case where the determination unit determines that the area ratio does not match the predetermined ratio condition, wherein the areas corresponding to the plurality of events are included within any of the at least two event areas, and wherein a position of the extraction area within the video frame based on the designation by the user is different from a position of the event area within a video frame of the recorded video, and wherein the extraction area and the event area are extracted from different frames of the recorded video recorded by the video recording unit.

2. The system according to claim 1, wherein:

processing unit, in a case where a second event corresponding to a second area occurs after a first event corresponding to a first area terminates, performs a control to display a video of a display area between the first area and the second area.

3. The system according to claim 1, wherein the second processing unit determines whether a difference between a time corresponding to the video of the extraction area displayed on the terminal device and a time when the predetermined event occurs in the recorded video is smaller than a predetermined time, wherein the second control is performed in a case where the difference between the time corresponding to the video of the extraction area displayed on the terminal device and a time when the predetermined event occurs is smaller than the predetermined time.

4. A video display method adapted to display a video on a terminal device, the video display method comprising the steps of:

acquiring a video of an extraction area based on a designation of the extraction area within a video frame by the user, wherein a plurality of video frames are recorded by a video recording unit as a recorded video;

performing a first control for displaying on the terminal device the video of the extraction area determined based on the designation by the user;

detecting an event within the recorded video;

determining, in a case where a plurality of events are detected in a video frame of the recorded video, whether an area ratio of an event area including areas corresponding to the plurality of events and the areas corresponding to the plurality of events matches a predetermined ratio condition; and

performing a second control for switching of the video displayed on the terminal device from the video of the extraction area to (i) a video of the event area including the areas corresponding to the plurality of events in a case where the determining step determines that the area ratio matches the predetermined ratio condition, and to (ii) videos of at least two event areas corresponding to the plurality of events in a case where the determining step determines that the area ratio does not match the predetermined ratio condition, wherein the areas corresponding to the plurality of events are included within any of the at least two event areas, and wherein a position of the extraction area within the video frame based on the designation by the user is different from a position of the event area within a video frame of the recorded video, and wherein the extraction area and the event area are extracted from different frames of the recorded video recorded by the video recording unit.

5. An apparatus comprising:

an acquisition unit configured to acquire a video of an extraction area based on a designation of the extraction area within a video frame by a user, wherein a plurality of video frames are recorded by a video recording unit as a recorded video;

a first processing unit configured to perform a first control for displaying on a display unit the video of the extraction area determined based on the designation;

a detection unit configured to detect an event within the recorded video;

a determination unit configured to determine, in a case where a plurality of events are detected in a video frame of the recorded video, whether an area ratio of an event area including areas corresponding to the plurality of events and the areas corresponding to the plurality of events matches a predetermined ratio condition; and

a second processing unit configured to perform a second control for switching of the video displayed on the display unit from the video of the extraction area to (i) a video of the event area including the areas corresponding to the plurality of events in a case where the determination unit determines that the area ratio matches the predetermined ratio condition, and to (ii) videos of at least two event areas corresponding to the plurality of events in a case where the determination unit determines that the area ratio does not match the predetermined ratio condition, wherein the areas corresponding to the plurality of events are included within any of the at least two event areas, and wherein a position of the extraction area within the video frame based on the designation by the user is different from a position of the event area within a video frame of the recorded video, and wherein the extraction area and the event area are extracted from different video frames of the recorded video.

6. The apparatus according to claim 5, wherein the event is detected based on at least one of detection results of a human figure, a face, and a color detected from the plurality of video frames of the recorded video.

7. The apparatus according to claim 5, further comprising a receiving unit configured to receive signal from at least one of a person sensor, a light sensor, and an audio sensor, wherein the event is detected based on the signal received by the receiving unit.

8. The apparatus according to claim 5, wherein the second processing unit determines whether a difference between a time corresponding to the video of the extraction area displayed on the terminal device and a time when the predetermined event occurs in the recorded video is smaller than a predetermined time, wherein the second control is performed in a case where the difference between the time corresponding to the video of the extraction area displayed on the terminal device and a time when the predetermined event occurs is smaller than the predetermined time.

14. The apparatus according to claim 5, wherein the processing unit performs the second control such that the acquisition unit requests the video of the event area in a case where a difference between a time corresponding to the video of the extraction area displayed on the display unit and a time when the predetermined event occurs within the recorded video is smaller than a predetermined time.

9. A non-transitory computer-readable medium storing a program for causing a computer to execute a method of an apparatus, the method comprising:

acquiring a video of an extraction area based on a designation of the extraction area within a video frame by the user, wherein a plurality of video frames are recorded by a video recording unit as a recorded video;

performing a first control for displaying on a display unit the video of the extraction area determined based on the designation;

detecting an event within the recorded video;

determining, in a case where a plurality of events are detected in a video frame of the recorded video, whether an area ratio of an event area including areas corresponding to the plurality of events and the areas corresponding to the plurality of events matches a predetermined ratio condition; and

performing a second control for switching of the video displayed on the display unit from the video of the extraction area to (i) a video of the event area including the areas corresponding to the plurality of events in a case where the determining step determines that the area ratio matches the predetermined ratio condition, and to (ii) videos of at least two event areas corresponding to the plurality of events in a case where the determining step determines that the area ratio does not match the predetermined ratio condition, wherein the areas corresponding to the plurality of events are included within any of the at least two event areas, and wherein a position of the extraction area within the video frame based on the designation by the user is different from a position of the event area within a video frame of the recorded video, and wherein the extraction area and the event area are extracted from different frames of the recorded video recorded by the video recording unit.

10. The medium according to claim 9, wherein the second control is performed such that the video of the event area is requested to the video recording unit in a case where a difference between a time corresponding to the video of the extraction area displayed on the display unit and a time when the predetermined event occurs is smaller than a predetermined time.

11. The medium according to claim 9, wherein the event is detected based on at least one of detection results of a human figure, a face, and a color detected from the plurality of video frames of the recorded video.

12. The medium according to claim 9, further comprising receiving signal from at least one of a person sensor, a light sensor, and an audio sensor, wherein the event is detected based on the signal received by the receiving step.

13. The medium according to claim 9, further comprising determining whether a difference between a time corresponding to the video of the extraction area displayed on the terminal device and a time when the predetermined event occurs in the recorded video is smaller than a predetermined time, wherein the second control is performed in a case where the difference between the time corresponding to the video of the extraction area displayed on the terminal device and a time when the predetermined event occurs is smaller than the predetermined time.