KR20180029400A - Monitoring Apparatus - Google Patents

Abstract

The present invention relates to a monitoring apparatus which comprises: a camera; an image processor obtaining an image from light transmitted from the camera, and extracting a current image brightness (luma) value; an illuminance sensor for detecting a current illuminance value of a unit around the camera; a database for receiving the current image brightness value from the image processor or receiving and storing the current illuminance value from the illuminance sensor; and a controller for comparing the current image brightness value or the current illuminance value with a prestored image brightness value or a prestored illuminance value to determine a light on/off change state of the unit around the camera according to a change level when at least any one value is changed.

Description

Monitoring Apparatus

The present invention includes an image processor for acquiring an image from light transmitted from a camera and a camera, extracting a current image brightness (luma) value, an illuminance sensor for detecting a current illuminance value of a camera periphery, Or a database for receiving and storing the current illuminance value from the illuminance sensor, comparing the current image brightness value or the current illuminance value with the previously stored image brightness value or illuminance value, respectively, and when at least one value is changed, And a controller for determining whether to change the light on / off state of the peripheral portion of the camera according to the degree of the change.

The camera system for video surveillance is installed in various environments and conditions. Public transport services Camera systems are used for security and safety in all places where humans can operate, such as inside, station, public places, schools, roads, inside and outside buildings, industries, factories, rivers and the sea. At this time, the camera system will be able to meet various situations that interfere with proper monitoring and operation.

In this case, in the case of the conventional camera system, the video data transmitted from the surveillance camera is analyzed to detect motion, and the user or the administrator can perform efficient video surveillance through analysis of the motion part.

More specifically, referring to FIG. 1, surveillance camera 110 is steadily illuminating a certain area. In this case, when a change occurs in the area monitored by the surveillance camera, for example, there is a person passing in front of the surveillance camera, a movement of the palm to shield the surveillance camera, or an object located in the surveillance area of the surveillance camera Motion, or the like, and motion detection can be performed.

However, when a conventional camera system is located in a building or a location close to a light, a light such as a light installed in a building, an incandescent lamp, an electric heat, a fluorescent lamp, a stand, etc., It is possible to prevent the motion detection of the system.

For example, referring to FIGS. 2A and 2B, when the light is turned on and off, the camera is converted into the image shown in FIG. At this time, since the area illuminated by the surveillance camera is momentarily blocked, the surveillance camera generates a false alarm event (False Alarm event) even though there is no movement of the object actually monitored )can do.

In addition, when light is weakened by light on and off of the area illuminated by the surveillance camera, the intensity or shape of the shadow of the object itself may be changed. Therefore, the surveillance camera may detect an error event Lt; / RTI >

On the other hand, when performing the image acquisition function of the camera, there may be tampering or the like which obstructs the image acquisition. For example, if a wind blows, a heavy rainfall, or a lightning strike is caused by a change in the surrounding climate, it can interfere with image acquisition by touching the camera. In addition, the camera may intentionally or deliberately attempt to acquire an image and may physically act on the camera for the purpose of a crime.

In the case of a conventional surveillance camera system, an image sensor or an image processor is used to determine the degree of change based on the acquired image data, and motion detection is performed. However, when the tampering action occurs to obscure the entire camera, there is a problem that the surveillance camera system can not detect the actual motion at all even if a substantial change occurs after the entire camera is hidden.

As described above, in order to solve the problems of the conventional surveillance camera system, the present invention selectively performs hardware judgment from the illuminance sensor and software judgment from the image processor, Or from off to on. The object of the present invention is to provide a monitoring apparatus capable of determining whether or not the state of the apparatus is changed from off to on.

The technical problem to be solved by the present invention is not limited to the above-mentioned technical problems, and various technical problems can be included within the scope of what is well known to a person skilled in the art from the following description.

According to an aspect of the present invention, there is provided a surveillance apparatus including a camera, an image processor for acquiring an image from light transmitted from the camera and extracting a current image luma value, A database for receiving the current image brightness value from the image processor or receiving and storing the current illumination value from the illumination sensor, a database for storing the current image brightness value or the current illumination value, An image brightness value or an illuminance value, and determining whether the camera peripheral portion is changed in light on / off according to the degree of change when at least one of the values changes.

In addition, the monitoring apparatus according to an embodiment of the present invention may allow the controller to monitor the image brightness value or the illuminance value at predetermined intervals.

In addition, the monitoring apparatus according to an embodiment of the present invention may further include a controller that updates the image brightness value or the illumination value stored in the database when at least one of the image brightness value and the brightness value changes can do.

At this time, the monitoring apparatus according to an embodiment of the present invention updates the image brightness value or the illumination value stored in the controller, and then updates the received current image brightness value or the received current brightness value, It is possible to determine whether the peripheral portion of the camera is changed to light on / off by comparing the illuminance values with each other.

According to another aspect of the present invention, there is provided a surveillance apparatus comprising: a controller configured to receive, from the image brightness value or the illuminance value, It is possible to judge whether the light on / off of the peripheral portion of the camera has been changed or not.

Further, the monitoring apparatus according to an embodiment of the present invention may further include a change-over to the light-on state of the camera periphery when the current image brightness value received by the controller reaches a maximum peak value within a predetermined time It can be judged.

In addition, the monitoring apparatus according to an embodiment of the present invention may further include a change-over to the light off state of the camera periphery when the current image brightness value received by the controller reaches a minimum peak value within a predetermined time It can be judged.

In addition, the monitoring apparatus according to an embodiment of the present invention may further include a change-over to the light-on state of the camera periphery when the current illumination value received as compared with the previously stored illumination value rises above a predetermined threshold value It can be judged.

The monitoring apparatus according to an embodiment of the present invention may further include a determination unit that determines whether a change in the light off state of the camera peripheral unit occurs when the current illumination value received by the controller is compared with a previously stored illumination value, can do.

Meanwhile, the monitoring apparatus according to an embodiment of the present invention compares a pre-stored image with an image acquired by the image processor, and determines that the camera detects motion when the image has changed by a predetermined threshold or more, And a motion detection processor for generating an event.

In this case, when the controller determines that the peripheral portion of the camera is changed to a light-on state or a light-off state, the motion detection processor determines whether the acquired image is changed over a predetermined threshold value The occurrence of the motion detection event can be blocked.

At this time, the monitoring apparatus according to an embodiment of the present invention may generate a motion detection event according to whether the image changes after a preset grace period has elapsed since the motion detection processor acquired the image.

Further, the monitoring apparatus according to an embodiment of the present invention may allow the image processor to set at least one sample point in the image, and extract a current image brightness value at the sample point.

At this time, in the monitoring apparatus according to an embodiment of the present invention, the controller compares the current image brightness value at the sample point with the previously stored image brightness value, It is possible to judge whether or not it is changed.

At this time, the monitoring apparatus according to an embodiment of the present invention may be configured such that the controller compares the current image brightness value at the sample point with the previously stored image brightness value, It is possible to judge whether or not the peripheral portion is changed to light on / off.

In addition, the monitoring apparatus according to an embodiment of the present invention sets a first determination period and a second determination period from a time point (t0) at which the controller extracts an image brightness value or an illuminance value, It is possible to determine whether the camera peripheral portion is turned on / off according to the degree of change and the degree of change between the second determination period.

The monitoring apparatus of the present invention can determine whether the light on the peripheral portion of the camera is turned on or off by using one or both of the illuminance sensor and the image processor. Therefore, even if an abnormality occurs in either of the two devices of the illuminance sensor or the camera, it is possible to check whether the peripheral portion of the camera has been changed to light on / off.

In addition, the monitoring apparatus of the present invention can perform motion detection using a camera, perform real-time analysis of an image transmitted from a camera, perform motion detection and region extraction of a motion object, and provide a result to a user or an administrator in real time .

In addition, the monitoring apparatus of the present invention monitors the illuminance value sensed by the illuminance sensor or the image brightness value extracted by the camera in real time, and when the illuminance value or the image brightness value changes, the value can be updated and stored in the database. Therefore, even if the illuminance value or the image brightness value changes rapidly, it is possible to immediately determine whether the light on / off is changed.

Further, the monitoring apparatus of the present invention may further include a motion detection processor to perform motion detection on an area monitored by the camera, and may generate a false alarm event that may occur when a change in the light on / Lt; / RTI >

Fig. 1 shows a configuration of a conventional surveillance camera system.
FIGS. 2A and 2B illustrate image data differences according to on / off change of a light located at the periphery of a surveillance camera.
Fig. 3 relates to an embodiment to which the monitoring apparatus of the present invention is applied.
4A, 4B and 4C relate to the configuration of the monitoring apparatus of the present invention.
Figure 5 relates to a configuration for receiving the monitoring device illumination value or the image brightness value of the present invention.
6 is a diagram illustrating a method of detecting a monitoring apparatus according to the present invention.
Fig. 7 relates to an embodiment in which the monitoring apparatus of the present invention determines whether a light-on / off state is detected as an illuminance value detected by an illuminance sensor.
FIGS. 8 and 9 relate to an embodiment in which the monitoring apparatus of the present invention judges based on illuminance values in order to determine whether a peripheral portion of a camera is turned on / off.
Fig. 10 relates to an embodiment in which the monitoring device of the present invention determines whether the image brightness value detected by the camera is a write-on / off state.
11 is a view showing an embodiment in which the monitoring apparatus of the present invention judges based on the image brightness value to determine whether the peripheral portion of the camera is on / off.
Figure 12 relates to an embodiment in which the monitoring device of the present invention determines an image brightness value.
Figure 13 relates to another embodiment in which the monitoring device of the present invention determines an image brightness value.

Hereinafter, a monitoring apparatus according to the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention. In addition, the matters described in the attached drawings may be different from those actually implemented by the schematic drawings to easily describe the embodiments of the present invention.

In the meantime, each constituent unit described below is only an example for implementing the present invention. Thus, in other implementations of the present invention, other components may be used without departing from the spirit and scope of the present invention.

Also, the expression " comprising " is intended to merely denote that such elements are present as an expression of " open ", and should not be understood to exclude additional elements.

Also, the expressions such as 'first, second', etc. are used only to distinguish between plural configurations, and do not limit the order or other features among the configurations.

In the description of the embodiments, it is to be understood that each layer (film), area, pattern or structure may be referred to as being "on" or "under / under" Quot; includes all that is formed directly or through another layer. The criteria for top / bottom or bottom / bottom of each layer are described with reference to the drawings.

 When a part is "connected" to another part, it includes not only "directly connected" but also "indirectly connected" with another part in between. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Fig. 3 relates to an embodiment to which the monitoring apparatus of the present invention is applied.

Referring to FIG. 3, it can be seen that a monitoring device is applied to a surveillance camera disposed in a building or a closed space, and a light located in the periphery of the surveillance camera. At this time, the monitoring device of the present invention includes various cameras such as a door bell camera, a network camera, a CCTV camera, and a surveillance camera, and judges whether the light on / off is changed by the image brightness value through the camera and the illuminance value through the illuminance sensor can do.

More specifically, the monitoring device of the present invention can acquire an image for the object 300 through the camera 210 and extract an image brightness value. In addition, the entire illuminance can be extracted through the illuminance sensor 230 inside the building or in the enclosed space. This enables the light on / off status to be confirmed by using the illumination value or the image brightness value as described later.

For example, when the user 400 changes the light 420 on / off through the switch 410, shading of the object 300 may occur or a shadow 310 may be generated. The monitoring apparatus of the present invention determines whether the light on / off is changed through only the illuminance value or the image brightness value without considering the external factors caused by the on / off of the light, so that occurrence of errors can be minimized. Detailed description of the operation of the monitoring apparatus of the present invention will be given later.

4A, 4B and 4C relate to the configuration of the monitoring apparatus of the present invention, and Fig. 5 relates to a configuration for receiving the monitoring apparatus illumination value or the image brightness value of the present invention.

4A, 4B, 4C and 5, the monitoring apparatus 200 of the present invention includes a camera 210, an image processor 220, an illuminance sensor 230, a database 240, a controller 250 ), And a motion detection processor 260.

At this time, the monitoring apparatus 200 of the present invention may be implemented with a camera, an image processor, a database, a controller, or a camera, an image processor, a database, a controller, and a motion detection processor. More specifically, this means that it is possible to determine whether the light is on / off through the image brightness value extracted from the camera and the image processor without the configuration of the light intensity sensor. Further, the monitoring apparatus of the present invention may be implemented so as to perform both functions of a controller and a motion detection processor in hardware, in which the motion detection processor and the controller are implemented in hardware, which is a single computing device.

The camera 210 photographs a certain region according to an installed angle using a lens, and forms an image so that an object to be photographed can be stored in a film or a memory. At this time, depending on the angle at which the camera device is installed, the lens receives the current state of the outside as light. The lens may include a diaphragm for controlling the amount of light transmitted through the lens, and the focal length of the lens may be adjusted.

The camera of the present invention may be embodied in a monitoring device, and may be implemented in a configuration of a controller or a hardware different from a database, or may be implemented in a different hardware from a sensing device in which a controller or a database is included as a single module. . It may also be implemented as a single module within a single monitoring device including a camera, an image processor, an illuminance sensor, a database, and a controller.

The image processor 220 may acquire an image in the light transmitted from the camera and extract the current image brightness (luma) value. Image processing refers to a method of converting an analog image and a video signal into a digital signal and processing the image through a computing device, and it is possible to extract an image brightness value after converting it into a digital signal. Through such image processing, it is possible to perform various operations such as image quality improvement, correction, conversion, analysis, synthesis, recognition, distortion correction, error and noise correction, and resolution conversion, which were impossible with analog signals.

More specifically, the image processor may convert the electrical brightness signal delivered to the image sensor to a digital image. In addition, the image processor refers to a device for detecting information of an object and converting the information into an electrical image signal. The image processor can convert not only visible light but also infrared light, ultraviolet light, etc., which can not be seen by humans. The image sensor may be implemented as a photoelectric conversion device, or may generate image information through a plurality of photodiodes.

In addition, the image processor 220 of the present invention can extract the image brightness value (Luma). In the case of a digital signal in which an analog signal is converted, the brightness value of the image of the digital signal itself can be extracted to confirm the brightness of the portion of the current monitoring camera. At this time, the image brightness value may be measured using a unit used by the image processing apparatus, or the brightness level may be determined using a relative size only in correspondence with the magnitude of the previously stored image brightness value.

This image brightness value may vary depending on the amount of light around the camera. For example, in bright sunlight, image brightness can be very high, and on a rainy evening, the image brightness can be very low. Likewise, when the light of the place where the camera is installed is turned on / off, the image brightness value increases when the light is turned on, and the image brightness value decreases when the light is turned off.

The illuminance sensor 230 can detect the current illuminance value of the peripheral portion of the camera. Roughness refers to the amount of light received per unit time per unit area, and is proportional to the light intensity of the light source. The illuminance can be expressed in units of lux, and the illuminance of the place where the current illuminance sensor is located can be detected by the illuminance sensor. At this time, the illuminance sensor detects the illuminance value by measuring the brightness of the surroundings, and can measure the photoelectric effect which changes the conductivity according to the amount of light.

The illuminance value detected by the illuminance sensor itself corresponds to a hardware analog value, and the image brightness value described above is different from software digital value. The image brightness value is obtained by extracting the brightness value after analog-to-digital conversion through image processing, but since the illuminance sensor detects the illuminance itself detected by the illuminance sensor itself, the illuminance value can be used as it is without any conversion device have.

The database 240 may store a current image brightness value from the image processor, or a current illumination value from the illumination sensor. The value measured by the camera or the illuminance sensor can be varied depending on various changes such as the amount of sunlight, day / night change, object movement, and the like. The database can update the image brightness value or the illumination value in real time, and can determine whether the camera peripheral portion that provides the controller 250 with the light on / off change based on the updated value.

The controller 250 compares the current image brightness value or the current image brightness value with the previously stored image brightness value or illuminance value, respectively. If at least one of the values is changed, / Off < / RTI > The monitoring apparatus of the present invention receives illuminance values or image brightness values to confirm whether lights (incandescent lamps, fluorescent lamps, electric heat lamps, stands, etc.) located in the periphery of the camera are turned on or off, The change is judged.

In addition, the controller of the present invention can be implemented as a system-on-chip (SoC). The system-on-chip, in which various semiconductor components are integrated, enables miniaturization and integration of the monitoring device.

At this time, the controller 250 of the present invention monitors the image brightness value or the illuminance value every predetermined period. The controller of the present invention may monitor continuously, but it may detect every predetermined period (ex. 100 ms) in order to reduce unnecessary power consumption and energy consumption of the controller.

In addition, the controller 250 of the present invention may update the image brightness value or the illuminance value stored in the database when a change occurs in at least one of the image brightness value and the brightness value. At this time, the controller updates the stored image brightness value or illumination value, and compares the received current image brightness value or the received current illumination value with the updated image brightness value or the updated illumination value, It is possible to determine whether or not the write-on /

As described above, since the image brightness value or the illuminance value stored in the database may change every time the image is monitored, the image brightness value or the illuminance value is compared using the updated value. For example, if the first measured image brightness value is 100 and the second measured image brightness value is 90, the database updates the image brightness value from 100 to 90. Next, the image brightness value extracted by the image processor is compared with the updated image brightness value 90 to determine whether to change the light on / off state.

In addition, when the controller 250 of the present invention does not receive any one of the image brightness value or the brightness value, the controller 250 controls the light on / off of the camera periphery only by the received brightness value or the brightness value It is possible to judge whether or not it is changed.

Referring to FIG. 5, the monitoring apparatus of the present invention determines whether a light on / off is changed by using an image brightness value received from the image processor 220 or an illuminance value received from the illuminance sensor 230. However, either of the two values may not be properly extracted, such as when an error occurs in the camera or when the illuminance sensor is stained. Accordingly, the controller of the present invention can make a complementary judgment by making only a received value of any one of the two values.

As shown in FIG. 5, the controller may operate by receiving the image brightness value or the roughness value from both the image processor and the roughness sensor, receiving only the image brightness value from the image processor, receiving only the roughness value from the roughness sensor, You may. An embodiment in which a controller (or a motion detection processor) operates when only one of the two configurations is operated will be described with reference to Figs. 7 to 11 to be described later.

6 is a diagram illustrating a method of detecting a monitoring apparatus according to the present invention. Referring to FIG. 6, the monitoring apparatus of the present invention extracts image brightness values from a camera and an image processor, and extracts illuminance values from an illuminance sensor. This may correspond to an embodiment using a light on / off sensing device using both illumination value and image brightness value. In this case, the order of extracting the illuminance value or the image brightness value may be independent of the order of extracting the illuminance value first, extracting the image brightness value first, or randomly extracting either of them.

Next, the controller determines whether the light is turned on or off according to the amount of change, based on the received image brightness value or illuminance value. Further, after it is determined that the light is turned on / off or not changed, the new image brightness value or the illumination value may be updated to update the state of the current peripheral portion.

FIGS. 7, 8 and 9 relate to an embodiment in which the monitoring apparatus of the present invention judges based on illuminance values in order to determine whether a peripheral portion of a camera is lit on / off.

Referring to FIG. 7, when the camera and the image processor fail to operate properly, the monitoring apparatus of the present invention can determine whether the light is on or off based only on the illumination value received from the illuminance sensor.

More specifically, after the illuminance sensor detects the illuminance value, it is determined whether or not the illuminance value changes. If the illuminance value changes to a level lower than a predetermined threshold value, it is determined that the light is not turned on / off, and the illuminance value is detected again. When the illuminance value rises to a level higher than a predetermined threshold value, it is determined that the light-off state has been changed from the light-off state to the light-on state. When the illumination value falls to a level higher than the predetermined threshold value, .

If the controller or motion detection processor determines that the corresponding light on / off state is changed, it will block the motion detection event even if it generates a motion detection event in the current image. have.

Referring to FIG. 8, the monitoring apparatus of the present invention determines whether or not the camera periphery is changed to light-on when the current illuminance value, which is compared with the previously stored illuminance value, rises above a preset threshold value can do. In this case, the y-axis values in FIGS. 8 and 9 are relative to the illuminance value when the light is on or off, the value 10 is about 1.22 lux, the value 1023 is about Corresponds to 124.87 lux.

The illumination value monitored by the camera generally maintains a constant value of about 0 to 10 (231) when there is no change in the degree of lighting or turning on the light. Then, when the user changes the light to on, the illuminance value rapidly rises from 0 to 1000 within a short time of about 0.4 second. When the controller of the present invention rises above a preset threshold value (ex. 1000), it can be determined that the light present in the peripheral portion of the camera has changed from the off state to the on state.

9, the monitoring apparatus of the present invention may further include a change-over to light off of the camera periphery when the current illumination value received in comparison with the previously stored illumination value falls below a preset threshold value It can be judged.

When the user turns off the light in a state in which the illuminance value 233 maintained constantly in a lit state is detected, the illuminance value falls from 1000 to 0 within a time of 0.4 to 0.8 seconds. The controller of the present invention can determine that the light present in the peripheral portion of the camera has changed from the ON state to the OFF state when the controller falls to a predetermined threshold value (ex.

At this time, the controller of the present invention can set a threshold value capable of detecting all kinds of on / off of various kinds of lights. 8 and 9, a light may include various kinds of lights, such as a very bright type daylight illumination (ex. 500-1000 illumination value) or a slightly less bright type sunset light (ex. An illuminance value between 300 and 500) can be used. The controller of the present invention sets a threshold value (ex 200) that can be applied to both daylight illumination and sunset illumination so that when the daylight illumination changes from 0 to 1000 or from 1000 to 0, 0 ". < / RTI >

Therefore, regardless of what kind of light is installed, the monitoring apparatus of the present invention makes it possible to effectively determine whether the light is on or off.

FIGS. 10 and 11 relate to an embodiment in which the monitoring apparatus of the present invention judges based on an image brightness value to determine whether a peripheral portion of a camera is turned on / off.

Referring to FIG. 10, when the illuminance sensor fails to operate properly, the monitoring apparatus of the present invention can determine whether to turn on / off the light based only on the image brightness value received from the camera.

More specifically, when the camera captures the surveillance area and acquires the image, the image processor detects the image brightness value, and then determines whether the image brightness value changes. If the image brightness value does not reach the predetermined peak value (the maximum peak value or the minimum peak value), it is determined that the light is not turned on / off, and the image is acquired again. When the image brightness value reaches the predetermined maximum peak value, it is determined that the light-off state is changed from the light-off state to the light-on state, and when the image brightness value reaches the predetermined minimum peak value, .

If the controller or motion detection processor determines that the corresponding light on / off state is changed, it will block the motion detection event even if it generates a motion detection event in the current image. have.

11 is a view showing an embodiment in which the monitoring apparatus of the present invention judges based on the image brightness value to determine whether the peripheral portion of the camera is on / off.

In the monitoring apparatus of the present invention, when the received current brightness value 221 reaches a maximum peak value 222 within a predetermined time, the controller determines whether the camera peripheral portion is changed to a light-on state can do. In addition, the controller may determine a change to the light off of the camera periphery when the received current image brightness value 223 reaches a minimum peak value 224 within a predetermined time.

Referring to FIG. 11, it is possible to determine whether the light is on / off through an image brightness value extracted from an image received through a camera. However, unlike the illuminance value that can reflect the brightness level directly by the hardware detection, the image brightness value becomes a constant value after the value reaches the peak value suddenly by automatic exposure (Auto-Exposure) Convergence.

When comparing with the value after convergence, the time required for excessive judgment is delayed, so that the monitoring apparatus of the present invention can quickly determine whether or not the peak value has been reached.

For example, in the light off state, the controller receives the image brightness value 221 from the image processor. Then, when the light is switched from the light-off state to the light-on state, the maximum peak value 222 is converged to a constant value within about 0.4 second by automatic exposure. The image brightness value 223 received within a short time similarly converges to a constant value after reaching the minimum peak value 224 even when the light-on state is changed to the light-off state. The monitoring apparatus of the present invention confirms whether the maximum peak value or the minimum peak value has been reached, and quickly determines whether or not the write-on / off is changed.

The motion detection processor 260 may compare the pre-stored image with the image acquired by the image processor to generate a motion detection event by determining that the camera has detected motion when the image has changed by a predetermined threshold value or more. At this time, the motion detection processor of the present invention may be configured as a hardware device independent of the controller as described above, and may perform the functions. The controller and the motion detection processor may constitute one hardware device to perform the functions.

Accordingly, the motion detection processor can detect that a motion has been detected when the number of pixels exceeding a predetermined ratio of the number of basic image pixels is determined to be different from each other after detecting a minute difference of pixels.

In addition, the motion detection processor uses the image data transmitted from the camera in real time. More specifically, the motion detection processor captures the contour partial image of the moving object with respect to the moving part to store the still image, It can be stored separately.

In the case of the motion detection processor performing the motion detection, the information of the moving object can be extracted. This can extract information about an object by sensing points or groups of regions having similar velocity vectors.

In addition, the morphological information of the moving object can be extracted by analyzing the diffused image. The difference image can be extracted by analyzing difference images classified by the difference in brightness between the i-1th image and the i-th image adjacent to each other.

Meanwhile, when the controller determines that the peripheral portion of the camera is changed to the write-on state or the light-off state, the motion detection processor may block the occurrence of the motion detection event even if the acquired image changes by a predetermined threshold value or more. The controller of the present invention does not generate a motion detection event when it determines that there is a change of the write-on / off, in order to correct an error that may cause a motion detection event even if there is no actual motion due to a shadow generated when a light is turned on. Therefore, the act of turning on and off a simple light without movement does not generate a motion detection event, and can improve the motion detection performance.

In addition, the motion detection processor of the present invention may generate a motion detection event according to whether the image has changed after a preset grace period has elapsed from the time of acquiring the image. The change of the write on / off occurs within a short time of about 100 ms as shown in FIG. 8, FIG. 9, and FIG. However, the monitoring apparatus of the present invention can set a predetermined grace period (e.g., 300 to 500 ms) in order to determine using both the illuminance value and the image brightness value.

Figure 12 relates to an embodiment in which the monitoring device of the present invention determines an image brightness value.

Referring to FIG. 12, the image processor of the present invention can set at least one sample point in the image, and extract the current image brightness value at the sample point.

When the monitoring device of the present invention extracts and compares the average illuminance values of the entire images acquired by the camera, an unintended error may occur because the average value is extracted. Therefore, the surveillance apparatus according to another embodiment of the present invention can set a sample point in an image and confirm the image brightness value for each sample point.

At this time, the controller compares the current image brightness value at the sample point with the previously stored image brightness value, respectively, and can determine whether the camera peripheral portion is light on / off according to the degree of change.

For example, as shown in FIG. 12, it is possible to designate 18 sample points of an image and confirm whether the image brightness value is changed for each sample point. Since the image brightness value changes in the light on state and the light off state, it is possible to confirm the light on / off change according to the degree of change.

More specifically, the current image brightness value at the sample point may be compared with the previously stored image brightness value, respectively, and it may be determined whether the camera peripheral portion is turned on / off when the changed sample point is greater than a predetermined number. For example, when 14 sample points of 18 sample points are changed, the monitoring apparatus of the present invention determines that the light on / off change has occurred since a change occurs at a predetermined number (12 or more) of sample points do.

Figure 13 relates to another embodiment in which the monitoring device of the present invention determines an image brightness value.

Referring to FIG. 13, the monitoring apparatus of the present invention sets a first judgment period and a second judgment period from a time t0 obtained by extracting an image brightness value or an illuminance value, It is possible to determine whether the camera peripheral portion is changed to light on / off according to the degree of change between the two judgment periods.

The above-described monitoring apparatus of the present invention determines whether or not to change based on the degree of change between the extracted time point t0 and the determination period (about 200 to 400 ms).

At this time, when the light is gradually turned off or on, for example, when a part of a plurality of lights is turned on and then a part is turned on again, a gradual change in the image brightness value or the illumination value does not reach a threshold value or a peak value . Therefore, the monitoring apparatus of the present invention sets a plurality of determination periods and determines whether or not the write-on / off state is changed by considering the degree of change according to the determination period.

For example, at the time point t0 at which the image brightness value is extracted as shown in FIG. 13, this corresponds to the light-off state (0 lights). Then, after the first judgment period (t0 + 200 ms) has elapsed, the light is partially turned on (two lights), and after the second judgment period (t0 + State.

The monitoring apparatus of the present invention is capable of monitoring the degree of change (0 to 4 lights) during the first judgment period (200 ms) (between 0 and 2 lights) and the second judgment period (400 ms) If the threshold value or the peak value is reached during the second determination period even though the threshold value or the peak value can not be reached within the first determination period, it can be determined that the write-on / off is changed.

The embodiments of the present invention described above are disclosed for the purpose of illustration, and the present invention is not limited thereto. 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 and scope of the invention.

110: Conventional security camera
210: camera
220: Image processor
221, 223: image brightness value
222: maximum peak value
224: minimum peak value
230: Illumination sensor
231, 232, 233, 234: illuminance value
240: Database
250: controller
260: Motion Detection Processor
300: camera monitor object
310: Shadows
400: Light on / off controller
410: switch
420: Light

Claims (16)

camera;
An image processor for obtaining an image from light transmitted from the camera and for extracting a current image brightness (luma) value;
An illuminance sensor for detecting a current illuminance value of the peripheral portion of the camera;
A database for receiving a current image brightness value from the image processor or receiving and storing a current illumination value from the illumination sensor;
Comparing the current image brightness value or the current lightness value with the previously stored image brightness value or the illumination value, and determining whether to change the light on / off state of the camera periphery according to the degree of change when at least one of the values is changed A controller for judging;
.
The method according to claim 1,
The controller comprising:
And monitors the image brightness value or the illuminance value every predetermined period.
The method according to claim 1,
The controller comprising:
And updates the image brightness value or the illumination value stored in the database when at least one of the image brightness value or the roughness value changes.
The method of claim 3,
The controller comprising:
After the stored image brightness value or brightness value is updated, the received current brightness value or the received current brightness value is compared with the updated image brightness value or the updated brightness value to determine whether the camera periphery light on / .
The method according to claim 1,
The controller comprising:
Wherein the controller determines whether to change the light on / off state of the camera periphery based on only the received brightness value or the brightness value when the brightness value or the brightness value is not received.
The method according to claim 1,
The controller comprising:
And when the received current image brightness value reaches a maximum peak value within a predetermined time, determines that the peripheral portion of the camera is changed to the light-on state.
The method according to claim 1,
The controller comprising:
And when the received current image brightness value reaches a minimum peak value within a predetermined time, determines that the camera peripheral portion is changed to light off.
The method according to claim 1,
The controller comprising:
Wherein the controller determines that the peripheral portion of the camera is changed to the light-on state when the current lightness value is increased by a predetermined threshold value or more in comparison with the previously stored illumination value.
The method according to claim 1,
The controller comprising:
Wherein the controller determines that the peripheral portion of the camera is changed to a light-off state when the current illumination value is lower than a predetermined threshold value in comparison with a previously stored illumination value.
The method according to claim 1,
A motion detection processor for comparing a pre-stored image with an image acquired by the image processor and generating a motion detection event by determining that the camera has detected motion when an image of a predetermined threshold or more has changed;
Further comprising:
11. The method of claim 10,
Wherein the motion detection processor blocks generation of a motion detection event even if the acquired image changes by a predetermined threshold value or more when the controller determines that the peripheral portion of the camera is changed to write on or write off.
11. The method of claim 10,
The motion detection processor comprising:
And generates a motion detection event according to whether the image has changed after a preset grace period has elapsed from the time of acquiring the image.
The method according to claim 1,
The image processor comprising:
Setting at least one sample point in the image, and extracting a current image brightness value at the sample point.
14. The method of claim 13,
The controller comprising:
And comparing the current image brightness value at the sample point with the previously stored image brightness value to determine whether the camera peripheral portion is changed on or off according to the degree of change.
15. The method of claim 14,
The controller comprising:
Comparing the current image brightness value at the sample point with the previously stored image brightness value, and determining whether to change the light on / off state of the camera periphery when the changed sample point is greater than a predetermined number.
The method according to claim 1,
The controller comprising:
And a second determination period is set from a time point (t0) at which the image brightness value or the illumination value is extracted, and a second determination period is set based on a degree of change between the first determination period and the second determination period, Off state of the light-on / off state.

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