KR101373456B1 - Apparatus and method for controlling motion detection - Google Patents

Abstract

The present invention relates to a motion detection control device and method in a digital video recorder, for example, in a digital video recorder to which a pan / tilt / zoom (PTZ) camera is connected, any of a plurality of preset points. When the video frame photographed at the point of storage and the pan / tilt / zoom information at the corresponding point is stored in conjunction with, and then the PTZ camera, while moving between the plurality of preset points, when shooting any point, Even when moving to another preset by comparing the stored video frame with the currently shot video frame to detect motion, and selectively performing a shooting and recording operation at any point according to the motion detection result. By efficiently performing the motion detection operation, when a motion event occurs, the corresponding point can be photographed and recorded. It is able to monitor and record such unauthorized intrusions or incidents.

Digital video recorder, PTZ camera, temporary preset information, motion detection, pan / tilt / zoom information

Description

Apparatus and method for controlling motion detection in digital video recorder

The present invention relates to a motion detection control apparatus and method in a digital video recorder, for example, in a digital video recorder (DVR) connected to a pan / tilt / zoom (PTZ) camera. The present invention relates to a motion detection control apparatus and method in a digital video recorder for efficiently performing a motion detection operation even while moving between a plurality of presets.

In general, a PTZ surveillance camera equipped with a pan / tilt / zoom function is mounted on a pan & tilter fixedly installed on a ceiling of a specific place, for example, as shown in FIG. 1. The surveillance camera 100 may include a surveillance area by a panning operation rotated 360 degrees in the horizontal direction by the pan / tilt 200 and a tilting operation rotated 180 degrees in the vertical direction. Can be changed in the other direction.

In addition, in the surveillance camera, the zoom lens may be variably adjusted in a tele or wide direction so that a specific subject may be enlarged or reduced in size, and the captured video image may be taken. As shown in FIG. 1, the digital video recorder 300 is located at a remote location.

Meanwhile, the digital video recorder 300 displays the video image photographed by the surveillance camera on a monitor screen and records the video image recorded on the hard disk (HDD) provided in the device. For example, a user who monitors an arbitrary area through the monitor screen, as shown in FIG. 2, the pan / tilt angle of the pan / tilt 200 and the zoom of the camera. By remotely adjusting the value, it is possible to preset the preset information so that the photographing state of the surveillance camera 100 is a desired photographing state.

For example, as shown in FIG. 2, among the first to fourth preset information Preset 1 to 4, the first preset information includes a pan angle of 0 degrees, a tilt angle of 45 degrees, and a zoom ratio. x 4, and the second preset information (Preset 2) is a pan angle of 90 degrees, a tilt angle of 60 degrees, and a zoom factor of x8, the PTZ camera 100 uses the first preset information to determine a pan angle of 0 degrees, With the tilt angle of 45 degrees, the shooting angle corresponding to the zoom magnification x 4, and the zoom magnification, the spot is taken for a predetermined time (eg, 30 seconds).

In addition, the video frame Frame #n photographed in real time at the first preset point is compared with the previously captured video frame Frame # n-1 to detect whether a subject motion, that is, motion, is generated. After the motion is detected, it is determined that the motion event has occurred, and the captured video is recorded on the hard disk.

On the other hand, after a predetermined time (for example, 30 seconds) has elapsed, after moving to the second preset point, the second preset information indicates a pan angle of 90 degrees, a tilt angle of 60 degrees, and a zoom factor x 8. A corresponding shooting angle and zoom ratio are obtained, and then a video frame (Frame #m) shot in real time is compared with a previously shot video frame (Frame # m-1) to detect whether motion has occurred. Done.

As a result of the detection, when a motion event occurs, a series of preset photographing operations for recording a photographed image on a hard disk is performed. Therefore, a photographing angle and a zoom ratio corresponding to the first to fourth preset information arbitrarily set by a user By using the respective points can be automatically moved and photographed recording.

However, in the general digital video recorder, the camera shooting operation is paused or the motion detection operation is paused while moving to another preset as described above. In the meantime, even if an important motion event occurs, it cannot be detected, and thus there is a problem that it is impossible to record and record an unauthorized intrusion or accident occurrence of a third party.

Accordingly, the present invention was created to solve the above problems, and for example, in a digital video recorder (DVR) to which a pan / tilt / zoom (PTZ) camera is connected, it is possible to move between a plurality of presets. On the way, there is provided a motion detection control apparatus and method in a digital video recorder for efficiently performing a motion detection operation so as to capture and record a corresponding point when a motion event occurs. There is a purpose.

Motion detection control method in a digital video recorder according to the present invention for achieving the above object, the video frame photographed at any point between a plurality of preset points and the pan / tilt / zoom information at the corresponding point Step 1 of linking and storing; A step of detecting motion by comparing the stored video frame with a currently captured video frame when the random point is photographed while moving between the plurality of preset points; And three steps of selectively performing a recording and recording operation at the arbitrary point according to the motion detection result.

In addition, the motion detection control apparatus in the digital video recorder according to the present invention, the storage means for linking and storing the video frame photographed at any point between a plurality of preset points and the pan / tilt / zoom information at the corresponding point ; Pan / tilt / zoom detection means for detecting whether to photograph the arbitrary point while moving between the plurality of preset points; Motion detecting means for detecting motion by comparing the stored video frame with the currently captured video frame when photographing the arbitrary point; And control means for selectively performing a shooting and recording operation at the arbitrary point according to the motion detection result.

According to the present invention, even when a pan / tilt / zoom (PTZ) camera is moving between a plurality of presets, a motion detection operation is efficiently performed to generate a corresponding motion event. By photographing and recording the point, it is possible to monitor and record the unauthorized intrusion or the occurrence of an accident by a third party, thereby greatly improving the surveillance performance.

Hereinafter, exemplary embodiments of a motion detection control apparatus and method in a digital video recorder according to the present invention will be described in detail with reference to the accompanying drawings.

In the digital video recorder (DVR) to which the present invention is applied, for example, as illustrated in FIG. 3, the digital signal processing unit 30, the codec 31, the hard disk 32, the motion detection unit 33, and the PTZ detection unit are illustrated. 34, CPE 35, and memory 36, etc., wherein the digital signal processing unit 30, as described above with reference to FIG. 1, is an analog photographed by the PTZ camera 100. After receiving the video signal, the signal is processed into a digital video signal, and outputted through the monitor screen, and outputted to the codec 31.

In the codec 31, the digital video signal is encoded into a video frame and recorded on the hard disk 32 according to the operation control of the CPI 35, or the hard disk ( The video frame read out in 32 is decoded into a digital video signal.

On the other hand, the motion detector 33 compares the currently captured video frame (Video Frame #n) and the previously captured video frame (Video Frame # n-1) to detect the movement of the subject, that is, whether or not the motion occurs In the CPI 35, the codec 31 is controlled in operation according to the motion detection result, so that the video frame in which motion generation is detected is recorded on the hard disk 32.

In addition, the PTZ detection unit 34, for example, the PTZ signal output from the pan / tilter 200 described above with reference to Figure 1, that is, a PTZ signal corresponding to the pan angle, filter angle, zoom magnification values On receipt, the pan angle, tilt angle, and zoom magnification values that the current PTZ camera is shooting are detected.

Temporary preset information is stored in the memory 36. For example, as shown in FIG. 4, in a state where the first to fourth presets Preset 1 to 4 are already set. When the user requests three temporary preset settings on the movement path between the first preset and the second preset, the CPI 35 samples three points between the first preset and the second preset, respectively. Sampling) to automatically set the corresponding first to third temporary presets Temp 1 to 3 Preset.

On the other hand, in the first temporary preset Temp1_Preset set as described above, for example, a pan angle 22.5 degrees, a tilt angle 45 degrees, a zoom factor x 4 value, and a video frame photographed at the corresponding point are included. In the second temporary preset Temp2_Preset, a pan angle of 45 degrees, a tilt angle of 45 degrees, a zoom factor x 4, and a video frame photographed at the corresponding point are stored in association with each other. 3 The temporary preset Temp3_Preset stores the pan angle 67.5 degrees, the tilt angle 45 degrees, the zoom magnification x 4 value, and the video frame (Frame #) photographed at the corresponding point.

Then, in the CPI 35, the PTZ camera 100 efficiently refers to the temporary preset information stored and managed as described above, even when the PTZ camera 100 moves from the first preset to the second preset. According to the motion detection result, the shooting and recording operations at the corresponding point are selectively performed. This will be described in detail below.

FIG. 5 is a flowchart illustrating a motion detection control method in the digital video recorder according to the present invention. For example, as shown in FIG. 6, the first to fourth presets Presets 1 to 4 are provided. If the user requests to set three temporary presets between the first preset and the second preset in the already set state, the CPI 35 displays three points on the moving path between the first preset and the second preset. Each is sampled (S10).

Then, the pan / tilt / zoom information corresponding to the sampled three points and the video frame photographed at the corresponding point are captured and stored as interlocked preset information in the memory 36 (S11).

Meanwhile, the CPI 35 performs a general preset shooting operation according to a user's request (S12), for example, when moving from the first preset to the second preset (S13), the PTZ detector In operation 34, a PTZ signal output from the pan / tilt 200 is received and compared with a PTZ value of temporary preset information stored in the memory 36.

In addition, if the PTZ value received from the pan / tilter 200 and the PTZ value of the temporary preset information stored in the memory 36 coincide with each other (S14), the video frame photographed at the corresponding point. And video frames stored in the temporary preset information are compared (S15).

For example, as shown in FIG. 6, if the current video frame actually photographed at the point corresponding to the first temporary preset information Temp1_PTZ is compared with the previously stored video frame, motion detection does not occur. Then, the current video frame actually photographed at the point corresponding to the second temporary preset information Temp2_PTZ is compared with the previously stored video frame to determine whether motion detection occurs.

If the motion detection does not occur, the current video frame actually captured at the point corresponding to the third temporary preset information Temp3_PTZ is compared with the previously stored video frame to determine whether motion detection occurs. For example, as shown in FIG. 6, when motion detection occurs (S16), the CPI 35 determines that a motion event is generated and the pan / tilter 200 is detected. By controlling the operation, and shooting a point corresponding to the third temporary preset information (Temp3_PTZ) for a predetermined time (S17).

Meanwhile, as described above, the motion detection operation performed during the movement from the first preset to the second preset may be performed while the PTZ camera 100 is continuously moved or may be quickly performed in a temporary stop state. After shooting and recording a point corresponding to the third temporary preset information for a predetermined time through the above process, the CPI 36 records the last video frame recorded and recorded in the third temporary preset information. It will perform a series of update operations that will save in association with the PTZ values.

When the preset operation is requested to stop (S19), for example, the CPI 35 performs any corresponding operation desired by the user, and therefore, in the digital video recorder 300 to which the present invention is applied, the preset operation is performed as another preset. Even during the movement, the motion detection operation is efficiently performed, and when a motion event occurs, the camera captures and records the corresponding point to monitor and record unauthorized intrusion or accident occurrence of a third party.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. , Alteration, substitution, addition, or the like.

1 illustrates a state where a pan / tilt equipped with a general PTZ camera and a digital video recorder are connected and connected.

2 illustrates an embodiment of preset information of a general PTZ camera,

3 illustrates a configuration of a digital video recorder to which the present invention is applied.

4 illustrates an embodiment of temporary preset information according to the present invention;

5 is a flowchart illustrating a motion detection control method in the digital video recorder according to the present invention;

6 illustrates an embodiment in which a motion detection operation is performed by temporary preset information according to the present invention.

[Description of Drawings]

100: surveillance camera 200: pan / tilter

300: digital video recorder 30: digital signal processing unit

31: codec 32: hard disk

33: motion detector 34: PTZ detector

35: Cffie 36: Memory

Claims (11)

A step of linking and storing the video frame photographed at any point between the plurality of preset points and the pan / tilt / zoom information at the corresponding point; Detecting a motion by comparing the stored video frame with a currently captured video frame when the predetermined point is photographed while moving between the plurality of preset points; And Optionally perform a recording and recording operation at any point according to the motion detection result, but if a motion event occurs, perform a recording and recording operation at the arbitrary point, and if a motion event does not occur, to a target preset point. It includes three steps, to perform the movement and shooting operation of, In the step 3, when performing a recording and recording operation at the arbitrary point, the step of linking and storing the last captured and recorded video frame with the pan / tilt / zoom information at the corresponding point is included. Motion detection control method in a digital video recorder. The method according to claim 1, In the first step, an arbitrary point between a plurality of preset points is randomly sampled according to a user's request, and the video frame and the pan / tilt / zoom information captured at the corresponding point are linked and stored as temporary preset information. A motion detection control method in a digital video recorder characterized by the above-mentioned. The method according to claim 1, In the step 2, if it is determined that the camera is photographing the arbitrary point based on the pan / tilt / zoom information detected while moving between the plurality of preset points, the stored video frame and the currently captured video are recorded. Motion detection control method in a digital video recorder, characterized in that the motion is detected by comparing the frames. delete delete Storage means for associating and storing the video frame photographed at any point between the plurality of preset points and pan / tilt / zoom information at the corresponding point; Pan / tilt / zoom detection means for detecting whether to photograph the arbitrary point while moving between the plurality of preset points; Motion detecting means for detecting motion by comparing the stored video frame with the currently captured video frame when the predetermined point is photographed; And According to the result of the motion detection, selectively perform the shooting and recording operation at the arbitrary point, if the motion event occurs, perform the shooting and recording operation at the arbitrary point, if the motion event does not occur to the target preset point In the case of performing a moving and shooting operation of the camera, and performing a shooting and recording operation at the predetermined point, the storage unit records and stores the last video frame recorded and recorded in association with the pan / tilt / zoom information at the corresponding point. Motion detection control device in a digital video recorder, characterized in that it comprises a control means for. The method according to claim 6, The storage means, if any point between a plurality of preset points are randomly sampled according to a user's request, the storage means to associate and store the video frame and pan / tilt / zoom information captured at that point as temporary preset information. A motion detection control device in a digital video recorder. The method according to claim 6, The pan / tilt / zoom detecting means detects whether to capture the arbitrary point by referring to the continuously received pan / tilt / zoom value while moving between a plurality of preset points. Motion detection control device in video recorder. The method according to claim 6, And the motion detecting means detects the occurrence of a motion event by comparing the stored video frame with the currently captured video frame when capturing an arbitrary point. delete delete

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