JP4663446B2 - Monitoring system and monitoring method - Google Patents

Description

  The present invention relates to a monitoring system and a monitoring method. In particular, the present invention relates to a monitoring system and a monitoring method for capturing a moving image in a predetermined direction.

  In recent years, monitoring systems using imaging devices have been placed in various places and used for detecting intruders and the like. In an imaging device used in a normal monitoring system, since the viewing angle of the imaging device is limited, there is a limit to the imaging area that can be covered by a single imaging device. Therefore, in order to cover a wide imaging area, the imaging area is expanded by installing a plurality of imaging apparatuses or using an imaging apparatus having a wide-angle lens having a wide viewing angle.

In addition, sound in the imaging area of the imaging device is collected and an abnormality in the imaging area is detected based on a change in sound pressure. Subsequently, when a change in sound pressure is detected, a monitoring device is proposed that extracts a moving object from an imaging region, zooms the imaging region, and changes the compression rate of an image including the extracted moving object ( For example, see Patent Document 1).
JP 2004-120595 A

  The monitoring device is required to acquire a wide area image for the purpose of monitoring the behavior of the person detected in the imaging area. However, when a plurality of imaging devices are used, the cost is increased due to securing the installation location of the imaging devices, maintenance work, and the like. Also, when imaging with an imaging device equipped with a wide-angle lens, it is possible to detect the movement of an intruder, etc., but the resolution per unit monitoring area is low, so the behavior of the intruder etc. can be clearly understood May be difficult.

  Moreover, in the invention described in Patent Document 1, a method for capturing an image by detecting an abnormality in an imaging region based on a change in sound pressure is proposed. In such a case, when the change in sound pressure when an intruder or the like has sneaked into is smaller than a predetermined reference value, it may not be possible to capture an image by changing the compression rate of the captured image. is there. Therefore, there are cases where the action of an intruder or the like cannot be captured accurately. Further, in the invention described in Patent Document 1, since only an area within a predetermined range can be imaged, for example, when monitoring an entire area such as a room, a plurality of monitoring devices are required. Cost and other aspects may be a problem.

  Then, an object of this invention is to provide the monitoring system and monitoring method which can solve the said subject. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

  In order to solve the above-described problem, in the first embodiment of the present invention, the monitoring system is a mirror unit, an imaging unit that captures an image reflected by the mirror unit, and an image of a plurality of different areas in which the mirror unit is different. A mirror rotation control unit that rotates the mirror unit so that the mirror unit is continuously reflected in the direction of the imaging unit, and the mirror unit is An imaging control unit that acquires a moving image of the predetermined region by causing the imaging unit to capture a predetermined region that is reflected in the direction.

  The imaging control unit captures each of the plurality of areas reflected by the mirror unit in the direction of the imaging unit when the mirror unit is rotated in a plurality of directions for each rotation of the mirror unit. By doing so, moving images of a plurality of regions may be acquired. Then, a display control unit that thins out and selects frame images of a plurality of areas continuously captured by the imaging unit at a timing synchronized with the rotation period of the mirror unit, and a frame image selected by the display control unit are sequentially displayed. And a display unit for playing back a moving image in a predetermined area. Further, based on the person extraction unit that extracts a person included in the moving image captured by the imaging unit, the movement vector calculation unit that calculates the movement vector of the person extracted by the person extraction unit, and the movement vector calculated by the movement vector calculation unit A motion prediction unit that predicts the motion of the person, and the imaging control unit changes the exposure timing of the imaging unit, thereby causing the motion prediction unit to predict a plurality of areas to be captured by the imaging unit. You may make it follow and rotate.

  In the second embodiment of the present invention, the monitoring method is an imaging step of capturing an image reflected by the mirror unit, and the mirror unit continuously reflects images of a plurality of different areas in the direction of the imaging unit. A mirror rotation control stage for rotating the mirror unit, and for each rotation of the mirror unit, a predetermined region where the mirror unit reflects in the direction of the imaging unit when the mirror unit is facing a predetermined direction An imaging control step of acquiring a moving image of a predetermined region by causing the imaging unit to capture an image.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  According to the present invention, it is possible to capture a moving image of a predetermined area and also to capture a moving image by following the actions of a person included in the moving image.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  FIG. 1 shows an example of a functional configuration of a monitoring system 100 according to an embodiment of the present invention. The monitoring system 100 includes a mirror unit 10, a rotary shaft 12, an imaging unit 20, a mirror rotation control unit 30, an imaging control unit 40, an image storage unit 50, a display control unit 60, a display unit 70, a person extraction unit 80, and a movement vector calculation. Unit 82 and motion prediction unit 84. The imaging unit 20 may include an optical system and a light receiving device. Furthermore, the light receiving device may include a plurality of light receiving elements. An object of the monitoring system 100 according to the present embodiment is to capture a moving image while capturing a moving image of a predetermined region and following the actions of a person included in the imaging region.

  The rotation shaft 12 rotates the mirror unit 10 based on the control of the mirror rotation control unit 30. The mirror unit 10 rotates along the rotation axis 12 to reflect an image in all directions of the imaging region in the direction of the imaging unit 20. The mirror unit 10 may be a plane mirror, a polygon mirror, or the like. When the mirror unit 10 is a polygonal mirror, an omnidirectional image of the imaging region is reflected in the direction of the imaging unit 20 through one mirror surface included in the plurality of mirrors included in the polygonal mirror. Here, the rotation of the mirror unit 10 may be performed so that a region including at least a part of the imaging region is reflected in the direction of the imaging unit 20. For example, when the image of the imaging region is reflected in the direction of the imaging unit 20, the mirror unit 10 may be rotated at an angle smaller than 360 °. Thereby, when the monitoring system 100 is set at, for example, the corner of the ceiling of the room, the mirror unit 10 can be imaged only by rotating the mirror unit 10 at an angle smaller than 360 °.

  The imaging unit 20 captures an image reflected by the rotating mirror unit 10 based on the control of the imaging control unit 40. When no person is included in the imaging area, the imaging unit 20 may capture a low-quality image by thinning out pixel data read from the plurality of light receiving elements. Further, when no person is included in the imaging region, the imaging unit 20 captures a low-resolution image or compresses the captured image to reduce the data amount of the captured image. May be. Further, when a person is included in the imaging area, the imaging unit 20 captures an image of the imaging area without thinning out pixel data read from the plurality of light receiving elements, and the person is included in the imaging area. An image having a higher resolution than that of the image captured when the image is not captured may be captured. Further, when a person is included in the imaging area, the imaging unit 20 reduces the compression rate for compressing the captured image, thereby reducing the image captured when the person is not included in the imaging area. Also, the resolution may be increased. The imaging unit 20 supplies the captured image to the person extraction unit 80 and the image storage unit 50.

  The mirror rotation control unit 30 controls the rotation of the mirror unit 10 by controlling the rotation axis 12 so that the mirror unit 10 continuously reflects a plurality of different region images in the direction of the imaging unit 20. The mirror rotation control unit 30 may control the rotation of the rotating shaft 12 based on control information related to the rotation period of the mirror unit 10. The mirror rotation control unit 30 supplies information related to the rotation period of the mirror unit 10 to the imaging control unit 40 and the image storage unit 50.

  Whenever the mirror unit 10 is rotated, the imaging control unit 40 captures a frame image of a predetermined region reflected by the mirror unit 10 in the direction of the imaging unit 20 when the mirror unit 10 faces a predetermined direction. The imaging unit 20 is caused to capture an image. And the imaging control part 40 makes the imaging part 20 acquire the moving image of the said predetermined | prescribed area | region. Specifically, the imaging control unit 40 is configured so that the mirror unit 10 faces each of a plurality of directions of the imaging region for each rotation of the mirror unit 10 based on the rotation period of the mirror unit 10 received from the mirror rotation control unit 30. The mirror unit 10 causes each of the plurality of areas reflected in the direction of the imaging unit 20 to be imaged by the imaging unit 20. More specifically, the imaging control unit 40 changes the exposure timing of the imaging unit 20 to capture each frame image of a plurality of areas reflected by the mirror unit 10 in the direction of the imaging unit 20.

  In addition, the imaging control unit 40 may cause the imaging unit 20 to image a plurality of regions by rotating the plurality of regions to be imaged by the imaging unit 20 based on the information received from the motion prediction unit 84. For example, when the imaging control unit 40 receives information indicating that there is a person in the imaging region from the motion prediction unit 84 and information on an expected position where the person is included, the imaging control unit 40 detects the motion of the person. The exposure timing of the imaging unit 20 may be changed so that the position where the person is expected to be captured is imaged. Note that the imaging control unit 40 may cause the imaging unit 20 to capture a high-resolution image when a person is included. The imaging control unit 40 supplies the imaging unit 20 with information for instructing imaging and information regarding the exposure time of imaging.

  The person extraction unit 80 extracts a person included in the moving image captured by the imaging unit 20. The person extraction unit 80 extracts a person from a plurality of frame images included in the captured image received from the imaging unit 20. The person extraction unit 80 detects a subject included in the frame image by image processing such as contour extraction processing and color distribution analysis processing. Then, the person extraction unit 80 may store a characteristic amount unique to a person's face in advance. The characteristic amount specific to the face of a person may be, for example, the face outline, eyes, nose, mouth, eyebrows, and the distance between parts included in these faces. The person extraction unit 80 may detect a characteristic amount specific to the face of the person from the subjects included in the frame image by matching or the like, and determine whether or not the subject is a person. The person extraction unit 80 may determine whether or not the subject included in the frame image is a person by image processing such as skin color extraction. When it is determined that the subject included in the frame image is a person, the person extraction unit 80 converts the frame image including the person and information indicating that the person is included in the frame image into the movement vector. It supplies to the calculation part 82.

  The movement vector calculation unit 82 calculates the movement vector of the person extracted by the person extraction unit 80. The movement vector calculation unit 82 calculates the movement vector of the person included in the frame image by performing image processing such as block matching and a gradient method on the plurality of frame images received from the person extraction unit 80. Good. The motion vector calculation unit 82 supplies the calculated motion vector information and information indicating that a person is included in the frame image to the motion prediction unit 84. The motion prediction unit 84 predicts the motion of a person included in the frame image based on the motion vector information received from the motion vector calculation unit 82. For example, the motion prediction unit 84 predicts in which region of the imaging region the person is present after a predetermined time has elapsed from the movement vector of the person included in the frame image. Further, the motion prediction unit 84 calculates the movement speed of the person based on the movement amount with respect to the background area included in the frame image of the person after a predetermined time has passed and the frame period. Then, the motion prediction unit 84 may predict the motion of the person included in the frame image by calculating the predicted position of the person after a predetermined time has elapsed. The motion prediction unit 84 supplies information indicating that a person is included in the frame image and information on a predicted position of the person included in the frame image after a predetermined time has elapsed to the imaging control unit 40.

  The image storage unit 50 stores the captured image received from the imaging unit 20. More specifically, the image storage unit 50 stores a plurality of frame images received from the imaging unit 20 in association with identifiers that can uniquely identify the frame images. The image storage unit 50 may store the timing at which the frame image is captured in association with the identifier. Further, the image storage unit 50 receives from the mirror rotation control unit 30 information regarding the rotation period of the mirror unit 10 when the frame image is captured. The image storage unit 50 may store a plurality of frame images in association with the direction in which each frame image is captured. The image storage unit 50 supplies the stored image and information related to the rotation period of the mirror unit 10 to the display control unit 60. Further, the image storage unit 50 may supply the plurality of frame images to the display control unit 60 in association with the direction in which the plurality of frame images are captured.

  Based on the information regarding the rotation cycle of the mirror unit 10 received from the image storage unit 50, the display control unit 60 sets the frame images of a plurality of areas that are continuously captured by the imaging unit 20 to the rotation cycle of the mirror unit 10. Select by thinning out at synchronized timing. For example, for each rotation of the mirror unit 10, the display control unit 60 selects a plurality of frame images captured by the imaging unit 20 when the mirror unit 10 faces a plurality of directions. More specifically, the display control unit 60 displays a plurality of frame images captured for the same region among a plurality of frame images captured in each of a plurality of directions based on the rotation period of the mirror unit 10. select. In addition, when the frame image received from the image storage unit 50 is associated with the direction in which the frame image is captured, the display control unit 60 captures the frame image that is associated with the frame image. A plurality of frame images may be selected based on the selected direction. Then, the display control unit 60 supplies the selected plurality of frame images to the display unit 70.

  The display unit 70 reproduces a moving image in a predetermined area by sequentially displaying a plurality of frame images selected by the display control unit 60 received from the display control unit 60. The display unit 70 may sequentially display a plurality of frame images on a monitor or the like. The display unit 70 may supply a plurality of frame images selected by the display control unit 60 received from the display control unit 60 to a person authentication device or the like via a network such as the Internet. Accordingly, when a high-resolution frame image is captured by the imaging unit 20, a person included in the high-resolution frame image can be authenticated.

  According to the monitoring system 100 according to the present embodiment, frame images of a plurality of regions continuously captured by the imaging unit 20 are selected for each of the plurality of regions, and the selected plurality of frame images are used as a monitor or the like. Can be displayed sequentially. Thereby, the monitoring system 100 can monitor a plurality of areas included in the imaging area with a moving image.

  Further, according to the monitoring system 100 according to the present embodiment, when a person is included in a frame image, a motion of the person can be predicted and a moving image can be captured following the movement of the person. Thereby, the monitoring system 100 can monitor the action of the person without interruption.

  FIG. 2 shows an example of a method for acquiring a moving image in the monitoring system 100 according to the present embodiment. In the monitoring system 100, the imaging control unit 40 includes a plurality of mirror units 10 reflecting in the direction of the imaging unit 20 when the mirror unit 10 faces a plurality of directions for each rotation of the mirror unit 10. The imaging unit 20 causes each of the areas to be imaged. For example, as illustrated in a schematic diagram 200, the imaging control unit 40 causes the imaging unit 20 to capture an image of an imaging region corresponding to each angle of view for each predetermined angle of view. That is, when the mirror unit 10 is oriented in the direction corresponding to the angle of view 202, the angle of view 204, and the angle of view 206, each of the imaging control units 40 is reflected by the mirror unit 10 in the direction of the imaging unit 20. The image is captured by the imaging unit 20. Note that the imaging control unit 40 may control the exposure time and the exposure timing of the imaging unit 20 so that the image captured by the imaging unit 20 becomes a still image.

  For example, when the mirror unit 10 is oriented in a direction corresponding to the angle of view 202, the imaging unit 20 reflects in the direction corresponding to the angle of view 202 reflected by the mirror unit 10 in the direction of the imaging unit 20. The image of the area is captured as a frame image 212, a frame image 214, a frame image 216, and the like. Further, when the mirror unit 10 is oriented in a direction corresponding to the angle of view 204, an image reflected by the mirror unit 10 in the direction of the imaging unit 20 is a frame image 222, a frame image 224, a frame image 226, or the like. As an image. Similarly, the imaging unit 20 captures the frame image 232, the frame image 234, the frame image 236, the frame image 238, and the like when the mirror unit 10 is oriented in the direction corresponding to the angle of view 206.

  The plurality of frame images captured by the imaging unit 20 are supplied to the image storage unit 50. The image storage unit 50 stores a plurality of frame images received from the imaging unit 20 in association with identifiers that can uniquely identify each frame image. Further, the image storage unit 50 receives information related to the rotation period of the mirror unit 10 from the mirror rotation control unit 30. Then, the image storage unit 50 stores a plurality of frame images in association with the direction in which each frame image is captured. The image storage unit 50 supplies the stored frame image, the rotation period of the mirror unit 10, and the plurality of frame images to the display control unit 60 in association with the direction in which the plurality of frame images are captured. The display control unit 60 thins out and selects the frame image received from the image storage unit 50 at a timing synchronized with the rotation cycle of the mirror unit 10 received from the image storage unit 50. For example, when the display control unit 60 receives the frame image 212, the frame image 214, the frame image 216, the frame image 222, the frame image 224, and the frame image 226 from the image storage unit 50, the display control unit 60 A frame image 212, a frame image 214, and a frame image 216 are selected as frame images captured when the mirror unit 10 is oriented in a direction corresponding to the angle of view 202. In addition, the display control unit 60 selects the frame image 222, the frame image 224, and the frame image 226 as the frame images captured when the mirror unit 10 is oriented in the direction corresponding to the angle of view 204.

  The display control unit 60 supplies the selected plurality of frame images to the display unit 70. The display unit 70 displays a plurality of frame images received from the display control unit 60 in order to reproduce a moving image in a predetermined area. For example, when the display unit 70 receives the frame image 232, the frame image 234, the frame image 236, and the frame image 238 from the display control unit 60, the frame image 232 through the frame image 238 are sequentially displayed, and the moving image 230 is displayed. Reproduce. Further, when the display unit 70 receives the frame image 222, the frame image 224, and the frame image 226 from the display control unit 60, the frame image 222 to the frame image 226 are sequentially displayed and the moving image 220 is reproduced. Thereby, the monitoring system 100 can acquire the moving image of each area. The monitoring system 100 can monitor the behavior of the person 900 when the person 900 is included in the frame image.

  According to the monitoring system 100 according to the present embodiment, a moving image can be reproduced by capturing a plurality of frame images for each predetermined region of the imaging region and sequentially displaying the frame images captured for each of the plurality of regions. As a result, the imaging unit 20 is rotated to capture a predetermined area, and the imaging unit 20 is further rotated to capture an image different from the predetermined area. You can get it.

  FIG. 3 is a diagram illustrating an example of a method in which the monitoring system 100 according to the present embodiment follows a subject. In the monitoring system 100, for each rotation of the mirror unit 10, an image of a predetermined region reflected in the direction of the imaging unit 20 is captured by the mirror unit 10 when the mirror unit 10 is facing a predetermined direction. And in the imaging control part 40 with which the monitoring system 100 is provided, the predetermined area | region imaged in the imaging part 20 can be changed for every rotation of the mirror part 10 by changing the exposure timing of the imaging part 20. FIG. As a result, the monitoring system 100 can divide the imaging area into a plurality of areas for imaging. For example, as shown in a schematic diagram 400, the monitoring system 100 can capture images of a plurality of regions by changing the exposure timing of the imaging unit 20 and dividing the imaging region into a plurality of regions corresponding to a plurality of angles of view. .

  For example, in the schematic diagram 400, when the mirror unit 10 faces the imaging direction 404 corresponding to the angle of view 402, the mirror unit 10 reflects an image in an area corresponding to the imaging direction 404 in the direction of the imaging unit 20. Let Then, the imaging control unit 40 controls the exposure timing of the imaging unit 20 so that an area corresponding to the imaging direction 404 is imaged, and causes the imaging unit 20 to image the area corresponding to the imaging direction 404. In such a case, when the person 910 is included in the plurality of frame images 502, the frame images 504, the frame images 506, and the like included in the moving image 500 captured by the imaging unit 20, the movement vector calculation unit 82 A movement vector of the person 910 is calculated. Then, based on the movement vector of the person 910 calculated by the movement vector calculation unit 82, the movement of the person 910 is predicted by the motion prediction unit 84.

  Then, the imaging control unit 40 changes the exposure timing of the imaging unit 20 based on the predicted position of the person 910 predicted by the motion prediction unit 84 after a predetermined time has elapsed. For example, every time the mirror unit 10 rotates, the imaging control unit 40 synchronizes with the timing at which the mirror unit 10 reflects an image in the imaging direction 408 corresponding to the angle of view 406 in the direction of the imaging unit 20, and the image of the region The exposure timing is changed so that the image is captured by the imaging unit 20. Subsequently, the imaging control unit 40 causes the imaging unit 20 to image a region corresponding to the imaging direction 408. Then, the imaging unit 20 captures a plurality of frame images 510, frame images 512, frame images 514, and the like in a region corresponding to the imaging direction 408. Thereby, the monitoring system 100 can acquire the moving image 508 in the imaging direction 408. Note that while it is determined that the person 910 is included in the frame image captured by the imaging unit 20, the imaging control unit 40 is based on the predicted position of the person 910 predicted by the motion prediction unit 84. The exposure timing of the imaging unit 20 may be changed so that the movement of the person 910 can be monitored following the movement of the person 910.

  According to the monitoring system 100 according to the present embodiment, when a person is included in the imaging region and the person has a movement, the exposure timing of the imaging unit 20 is changed by following the movement of the person. Can do. The monitoring system 100 can capture a moving image of the person. Thereby, the monitoring system 100 can acquire an uninterrupted moving image regarding the movement of the person.

  FIG. 4 is a diagram illustrating an example of a method in which the monitoring system 100 according to the present embodiment follows a subject. In the schematic diagram 600, the mirror unit 10 reflects an image in the imaging direction 602 corresponding to the angle of view 606 in the direction of the imaging unit 20, and exposure of the imaging unit 20 is performed so that an area corresponding to the imaging direction 602 is captured. When the timing is set, the imaging unit 20 captures an area corresponding to the imaging direction 602. Further, the exposure timing of the imaging unit 20 is set so that the region corresponding to the imaging direction 604 is captured at the timing when the mirror unit 10 reflects the image in the imaging direction 604 corresponding to the angle of view 608 in the direction of the imaging unit 20. When set, the imaging unit 20 captures an area corresponding to the imaging direction 604. The monitoring system 100 captures an image so that a region corresponding to the imaging direction is captured when the mirror unit 10 reflects an image in a predetermined imaging direction corresponding to a predetermined angle of view in the direction of the imaging unit 20. By setting the exposure timing of the unit 20, it is possible to capture images of a plurality of regions.

  Here, as illustrated in a schematic diagram 600, when a person is included in the imaging direction 602 and the imaging direction 604, the monitoring system 100 is included in each of the imaging direction 602 and the imaging direction 604. A moving image is captured following the movement of a person. For example, as shown in a schematic diagram 630, a case is considered where a person is included in an area in the imaging direction 612 corresponding to the angle of view 616 and an area in the imaging direction 622 corresponding to the angle of view 626. In such a case, the monitoring system 100 follows the movement of the person included in the imaging direction 612 and rotates the area to be imaged by the imaging unit 20 in the direction of the rotation direction 610. Then, the monitoring system 100 captures a moving image in an area in the imaging direction 614 corresponding to the angle of view 618. Specifically, the monitoring system 100 changes the exposure timing of the imaging unit 20, and the area reflected by the mirror unit 10 in the direction of the imaging unit 20 when the mirror unit 10 faces the imaging direction 614. The image is captured by the imaging unit 20. Accordingly, the monitoring system 100 can capture a moving image in the region of the imaging direction 614.

  On the other hand, the monitoring system 100 follows the movement of the person included in the imaging direction 622 and rotates the area to be imaged by the imaging unit 20 in the direction of the rotation direction 620. Then, the monitoring system 100 captures a moving image in an area in the imaging direction 624 corresponding to the angle of view 628. Specifically, the monitoring system 100 changes the exposure timing of the imaging unit 20, and is reflected in the direction of the imaging unit 20 by the mirror unit 10 when the mirror unit 10 is oriented in the imaging direction 624. The imaging unit 20 is caused to capture an image of the area in the imaging direction 624. As a result, the monitoring system 100 can also capture a moving image in the region of the imaging direction 624.

  According to the monitoring system 100 according to the present embodiment, when a person is included in a plurality of areas, the moving image of each area including the person is imaged, and the imaging unit is made to follow the movement of each person. The exposure timing of 20 can be changed. Thereby, the monitoring system 100 can acquire uninterrupted moving images for the movements of a plurality of persons.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

2 is a block diagram showing a functional configuration of a monitoring system 100. FIG. 3 is a diagram illustrating a method of acquiring a moving image in the monitoring system 100. FIG. It is a figure which shows the method the monitoring system 100 tracks a to-be-photographed object. It is a figure which shows the method the monitoring system 100 tracks a to-be-photographed object.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mirror part 12 Rotating axis 20 Imaging part 30 Mirror rotation control part 40 Imaging control part 50 Image storage part 60 Display control part 70 Display part 80 Person extraction part 82 Movement vector calculation part 84 Motion prediction part 100 Monitoring system 200 Schematic 202 204, 206 Angle of view 210, 220, 230 Movie 212, 214, 216 Frame image 222, 224, 226 Frame image 232, 234, 236, 238 Frame image 400 Schematic diagram 402, 406 Angle of view 404, 408 Imaging direction 500, 508 Movie 502, 504, 506 Frame image 510, 512, 514 Frame image 600, 630 Schematic diagram 602, 604 Imaging direction 606, 608 Angle of view 616, 618, 626, 628 Angle of view 610, 620 Rotation direction 612, 614, 622, 62 4 Imaging direction 900, 910 People

Claims (4)

Mirror part,
An imaging unit that captures an image reflected by the mirror unit;
A mirror rotation control unit that rotates the mirror unit so that the mirror unit continuously reflects images of a plurality of different areas in the direction of the imaging unit;
For each rotation of the mirror portion, and the realm you are reflected in the direction of the mirror portion is the imaging unit is imaging in the imaging unit when the mirror portion is oriented in a predetermined direction, said region An imaging control unit that acquires
A person extraction unit for extracting a person included in the moving image captured by the imaging unit;
A movement vector calculation unit for calculating a movement vector of the person extracted by the person extraction unit;
A motion prediction unit that predicts a person's motion based on the movement vector calculated by the movement vector calculation unit;
With
The imaging control unit is a monitoring system in which an exposure timing of the imaging unit is changed to rotate a region to be imaged by the imaging unit in accordance with the movement of the person predicted by the motion prediction unit . For each rotation of the mirror unit, the imaging control unit applies each of the plurality of regions that the mirror unit reflects in the direction of the imaging unit when the mirror unit is facing a plurality of directions, respectively. The monitoring system according to claim 1, wherein the monitoring unit acquires images of a plurality of areas by causing the imaging unit to capture images. A display control unit that thins out and selects frame images of a plurality of regions captured continuously by the imaging unit at a timing synchronized with a rotation period of the mirror unit;
The monitoring system according to claim 2, further comprising: a display unit that reproduces a moving image in a predetermined region by sequentially displaying the frame images selected by the display control unit. An imaging stage for capturing an image reflected by the mirror unit;
A mirror rotation control step of rotating the mirror unit so that the mirror unit continuously reflects images of a plurality of different areas in the direction of the imaging unit;
For each rotation of the mirror portion, and the realm you are reflected in the direction of the mirror portion is the imaging unit is imaging in the imaging unit when the mirror portion is oriented in a predetermined direction, said region Imaging control stage to acquire
A person extracting step of extracting a person included in the moving image captured by the imaging unit;
A movement vector calculation stage for calculating a movement vector of the person extracted in the person extraction stage;
A motion prediction stage for predicting a person's movement based on the movement vector calculated in the movement vector calculation stage;
With
In the imaging control step, the exposure timing of the imaging unit is changed to rotate a region to be imaged by the imaging unit in accordance with the movement of the person predicted by the motion prediction unit .

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