KR101634129B1 - Moving object tracting control system for pan-tilt camera - Google Patents

Abstract

The present invention relates to a video tracking control system of a pan-tilt integral type surveillance camera capable of sensing moving objects in the nighttime or in a dark place and acquiring accurate object images by operating a coarse camera and a high-brightness LED auxiliary light source.

Description

TECHNICAL FIELD [0001] The present invention relates to a video tracking control system for a pan / tilt integral type surveillance camera,

The present invention relates to a video tracking control system for a surveillance camera. More particularly, the present invention relates to a video surveillance system for a surveillance camera, and more particularly, to a video surveillance system for surveillance cameras, which can detect moving objects in the nighttime or in a dark place and can acquire precise object images by operating a coarse camera and a high- And more particularly,

In general, closed circuit television (CCTV) is used to prevent crime in residential areas, to prevent theft of commercial areas, and to check the operation status and process flow of the machine at industrial sites.

Such a surveillance camera is generally operated for the purpose of monitoring images at a remote place by recording the situation of a specific place 24 hours, and an auxiliary light source for preventing the discrimination power from being outputted in dark at night or at a dark place is added . As an auxiliary light source, an infrared light emitting diode (IR LED) is often used as a main monitoring target so that a person can not recognize the infrared light and the shooting situation.

However, since a surveillance camera with a conventional infrared-assisted light source is installed integrally with a front portion of a camera lens, infrared LEDs can not adjust the irradiation angle of the infrared LED, I could not help it.

Also, due to the characteristic of infrared rays, high heat is generated. Therefore, there is a problem that the electronic devices constituting the camera are damaged or malfunction due to heat generated from the infrared LED according to the long time operation of the auxiliary light source. Although there has been an attempt to make the operation and shooting of the auxiliary light source only when the motion is recognized, it is practically impossible to recognize the motion smoothly and to clearly recognize the photographer.

Japanese Patent Application Laid-Open No. 2007-166570

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an apparatus and method for continuously photographing a designated area through a main light source and a wide angle camera and controlling an auxiliary light source and a narrow angle camera And to provide a video tracking control system of a pan / tilt integral type surveillance camera that can obtain a precise enlarged image of a detected object.

In order to achieve the above object, according to the present invention, there is provided an image processing apparatus including a first image acquiring unit including a wide-angle camera unit for photographing a designated area, and a main light source unit for operating in conjunction with the wide-angle camera unit to illuminate an image- And a second image formed of an auxiliary light source unit that operates in cooperation with the narrow-angle camera unit and illuminates an image pickup region of the narrow-angle camera unit, the narrow-angle camera unit including a narrow- An acquisition unit; A pan tilt driver for driving the second image acquisition unit in left and right and up and down directions; A movement detection sensor unit for sensing a movement of an object in the photographing area of the wide angle camera unit; An image converting unit for converting the resolution of the image acquired through the wide angle camera unit to a predetermined level according to the detection of the motion detection sensor unit, an extracting unit for sampling the converted image through the image converting unit, A memory unit for storing an image sampled by the extracting unit; a comparison unit for comparing the images stored in the memory unit and sensing a change area; and a position signal generator for generating three-dimensional space coordinates corresponding to the change area detection of the comparison unit. A controller for controlling the second image acquiring unit and the pan tilt driving unit according to the three-dimensional spatial coordinates generated by the position signal generating unit; .

Here, the comparison unit compares RGB values of adjacent images according to time, and determines the occurrence of a change when the comparison value is equal to or greater than a preset threshold value. The control unit may determine a shift distance, An object tracking unit for resetting the change detection area according to the tracking information generated by the tracking information generation unit and tracking a change; The second image acquiring unit, and the pan tilt driving unit.

The auxiliary light source unit includes a light source unit having an infrared LED and a power LED module, and a light source width adjusting unit configured to adjust the angle of light to be irradiated by adjusting a distance between the light source lens and the light source unit, And the brightness of the image photographed through the narrow-angle camera unit may be determined to control the auxiliary light source unit in a set pattern.

It is possible to identify a clear object by efficiently controlling the variable auxiliary light source and the narrow angle camera in the night time zone or in a dark place through the present invention and to separate the auxiliary light source with the camera and the control circuit, It is possible to prevent damage and malfunction of the apparatus.

Also, since the coarse camera and the auxiliary light source are operated only when the motion of the object is captured at a low power through the wide angle camera and the main light source, the heat generated from the auxiliary light source can be effectively controlled and unnecessary power consumption can be prevented have.

In addition, a clear object can be photographed through the function of controlling the irradiation direction and the emission width of the auxiliary light source in accordance with the position and distance to the object.

FIG. 1 is a perspective view showing the outline of a pan / tilt surveillance camera to which the present invention is applied,
2 is a block diagram illustrating a configuration and a connection relationship according to a preferred embodiment of the present invention.
3 is a block diagram illustrating a configuration and a connection relationship according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration of a video tracking control system of a pan / tilt integral type surveillance camera of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing the external appearance of a pan / tilt surveillance camera to which the present invention is applied, and FIG. 2 is a block diagram showing a configuration and a connection relationship according to a preferred embodiment of the present invention.

1, the present invention preferably has a configuration in which the wide-angle camera section 111, the main light source section 112, the narrow-angle camera section 121, and the auxiliary light source section 122 are integrally formed, When a person who is an object of the main monitoring, which is photographed with respect to a local area through the camera unit 111, moves to the photographing area and detects the moving person's face through the narrow-angle camera unit 121.

2, the first image acquiring unit 110, the second image acquiring unit 120, the pan tilt driving unit 120, A motion detection sensor unit 150, and a control unit 140, as shown in FIG.

The first image acquiring unit 110 corresponds to a wide angle CCTV camera system for continuous image acquisition in a relatively wide area and includes a wide angle camera unit 111 and a main light source unit 112 So that the photographing is always performed in a state fixed to the specific structure.

The wide-angle camera unit 111 is a camera unit configured to capture a relatively wide area as a whole. The wide-angle camera unit 111 uses a widening angle of view as the focal length between a normal lens and a CCD device becomes shorter, And is normally set to take a picture within a distance of 30 meters.

The main light source unit 112 operates together with the wide-angle camera unit 111 to easily identify an image photographed by the wide-angle camera unit 111 in the nighttime or in a dark place, An infrared LED, and is installed on a side surface of the wide-angle camera unit 111 to project light. At this time, the main light source unit 112 may be provided with an ambient light sensor under an environment in which the brightness of the surroundings is varied, so that the main light source unit 112 selectively operates in accordance with the ambient brightness.

The second image acquiring unit 120 may be a variable angle control type CCTV camera system capable of enhancing the image recognition rate in the nighttime or dark environment by 50% or more by assisting the first image acquiring unit 110. [ And has a narrow angle camera unit 121 and an auxiliary light source unit 122 and is connected to the first image obtaining unit 110 through a pan tilt driving unit 120 as shown in FIG. As shown in Fig.

The narrow angle camera unit 121 is configured to obtain a precise image of a moving object photographed through the wide angle camera unit 111. The narrow angle camera unit 121 photographs a narrow area as compared with the wide angle camera unit 111, So that a high resolution image is obtained. Further, unlike the wide-angle camera unit for acquiring an image of a fixed angle, a zoom function is provided to effectively correspond to a distance to an object, so that an object at any position within the shooting range can be tracked.

The auxiliary light source unit 122 operates in cooperation with the narrow-angle camera unit 121 to illuminate the photographing area of the narrow-angle camera unit 121. The auxiliary light source unit 122 irradiates a stronger amount of light than the main light source unit 112, So that a clear image can be obtained.

Unlike the first image acquiring unit 110, the second image acquiring unit 120 does not operate normally when there is no object that is moving normally within the shooting range of the first image acquiring unit 110 And precisely photographs the moving object by operating only when the moving object is recognized within the shooting range of the first image obtaining unit 110. [

1, the pan tilt driver 120 is positioned between the first image acquiring unit 110 and the second image acquiring unit 120 and rotates the second image acquiring unit 120 horizontally and vertically . The second image acquiring unit 120 may be moved to the left and right in accordance with the signal of the controller 140 so that the second image acquiring unit 120 may be moved through the transmission device operated through the control unit 140. [ And a horizontal rotation unit 132 for moving the second image acquisition unit 120 up and down in response to the signal of the control unit 140. The vertical rotation unit 131 rotates the vertical rotation unit 131, And the horizontal rotation unit 132 constitute a transmission device such as a servo motor capable of precisely controlling the second image acquisition unit 120 to rotate up and down and left and right.

The motion detection sensor unit 150 may be one of a microwave sensor, a PIR sensor, and an RF sensor for sensing an object moving within an imaging region of the wide angle camera unit 111.

The microwave sensor is a detector using the Doppler Radar principle, and can be used in a harsh environment due to heat, temperature, noise, humidity, airflow, dust, etc., and has a merit that there is little malfunction. Normally, it is possible to detect up to 25 ~ 30m, and the sensing angle is 120 ~ 130 ° to form a perfect sensing zone to detect the movement of objects.

The PIR sensor receives and senses infrared rays (heat) emitted from an object (particularly a human body). When a temperature change occurs due to an external condition within a surveillance region, the PIR sensor converts the temperature change amount into an electrical signal, Pulse generation number) or more.

The RF sensor senses the movement of an object in real time using a high frequency and operates only when there is movement of an object such as a person regardless of temperature, humidity, dust, sunlight, and sound. Detection distance is about 20 ~ 30m, and barrier such as partition can easily penetrate, so it can be applied to a large-sized underground parking lot or compartment with partition.

The control unit 140 basically controls the first image obtaining unit 110, the second image obtaining unit 120 and the pan tilt driving unit 120. The control unit 140 includes an image converting unit 141, 142, a memory unit 143, a comparing unit 144, and a position signal generating unit 145. The detailed configurations of the control unit 140 are for sensing an object moving in the photographing region through the image acquired through the first image acquiring unit 110 and photographing the moving object through the second image acquiring unit 120 Basically, it senses an object moving through the motion detection sensor unit 150. However, it can smoothly control the control of the pan tilt driving unit 120 according to the accurate position calculation of the object and the tracking according to the movement of the object do.

The control unit 140 basically transmits the image obtained through the wide angle camera unit 111 and the narrow angle camera unit 121 to a designated server or receives a control signal from the outside through a well- And a communication unit formed of means.

The image converting unit 141 converts the resolution of the image acquired through the wide angle camera unit 111 to a predetermined level according to the detection of the motion detection sensor unit 150. Conventionally, in order to detect and track a moving object in a captured image, a large amount of resources have to be allocated in storage capacity and processing time by directly processing an image acquired through the wide-angle camera unit 111. However, in the present invention, And the time required for the storage processing and the information processing can be saved.

The extracting unit 142 is configured to sample the converted image through the image converting unit 141 on a frame-by-frame basis. After comparing the sampled frame and the frame, the extracting unit 142 recognizes the change area as a moving object and tracks the position . If the sampling unit is too short, a space for storing an image and a processing time are required. Therefore, an appropriate sampling time is set within a range in which objects in a frame can be recognized smoothly.

The memory unit 143 is configured to store an image sampled through the extracting unit 142 and uses a basic memory included in the controller 140 instead of an external memory such as a conventional SD card. That is, conventionally, an image is stored in an SD card separately provided due to a capacity problem. However, in the present invention, since the image is converted into a low resolution image having a low capacity, the use of the SD card area can be reduced.

The comparison unit 144 compares the images stored in the memory unit 143 and detects a change value. The comparison unit 144 compares the sampled images with each other in time order, .

The position signal generator 145 generates three-dimensional spatial coordinates corresponding to the detection of the change area of the comparison unit 144. The position signal generator 145 generates three-dimensional spatial coordinates corresponding to the area of the place to be photographed through the first image obtaining unit 110 The control unit 120 controls the operation of the narrow-angle camera unit 121 through the pan / tilt driving unit 120 with respect to the position where the basic information and the position control value of the pan / tilt driver 120 are input in advance, And calculates a position value corresponding to the shooting direction and the projection direction of the auxiliary light source 122. [

The control unit 140 controls the second image acquisition unit 120 and the pan tilt driving unit 120 according to the three-dimensional spatial coordinates generated by the position signal generation unit 145, And accurate photographing is performed.

FIG. 3 is a block diagram illustrating a configuration and a connection relationship according to another embodiment of the present invention. In FIG. 3, the motion sensing unit 150 tracks An information generating unit 146, an object tracking unit 147, and an interlocking unit 148 are added. In the following description, components that perform the same functions as those in the preferred embodiment of the present invention described with reference to FIG. 2 will not be described in detail.

First, in another embodiment of the present invention, the comparison unit 144 compares RGB values of adjacent images according to time, and determines the occurrence of a change when the comparison value is equal to or greater than a preset threshold value. In the present invention, the comparison unit 144 detects a change in an adjacent frame, and thus it can be understood that it is for sensing a moving person as a main monitoring target. In order to minimize the influence of the signal noise, the RGB values are compared with each other so as to allow accurate recognition of the moving person, and it is determined that a change occurs when the difference value is equal to or greater than the preset threshold value.

The tracking information generating unit 146 generates tracking information on the moving distance and the direction with respect to the pixel area where the change determined by the comparing unit 144 is generated. The moving direction and speed of the change area are divided into eight spaces corresponding to the vertical, left and right and diagonal directions based on the area in which the normal change is detected.

The object tracking unit 147 resets the change detection area according to the tracking information generated by the tracking information generation unit 146 and tracks the change. As described above, The tracking area is moved and extended to the area coinciding with the moving direction of the changing area among the space of the moving object.

The interlocking unit 148 controls the second image acquiring unit 120 and the pan tilt driving unit 120 according to the detection result of the object tracking unit 147. In the preferred embodiment of the present invention, The coarse camera unit 121 and the auxiliary light source unit 122 of the second image acquisition unit 120 are operated and the three-dimensional spatial coordinates for tracking the object are generated to control the pan tilt driving unit 120, So that accurate photographing can be performed.

According to another embodiment of the present invention, the auxiliary light source unit 122 includes a light source body 123 having an infrared LED and a power LED module, and a light source unit 123 for adjusting the angle of light to be illuminated And the control unit 140 controls the auxiliary light source unit 122 by determining the brightness of the image photographed through the coarse camera unit 121. The control unit 140 controls the auxiliary light source unit 122, That is, the infrared LED and the power LED are appropriately used according to circumstances, so that the shooting of the object is performed over the set brightness through the narrow-angle camera unit 121, and the amount of light reaches to a further distance And preferably, the irradiation range is controlled to coincide with the photographing area of the narrow-angle camera unit 121, so that a sufficient product performance can be realized even at a low power.

The beam width adjusting unit 124 may include a convex lens installed on the front surface of the auxiliary light source unit 122 and a bracket provided with the light source unit and capable of moving forward and backward through a driving unit. It is preferable to use a method of concentrating illumination on an object by controlling the angle of light output by advancing or retracting the object.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

110: first image acquiring unit 111: wide angle camera unit
112: main light source unit 120: second image acquisition unit
121: coarse-angle camera unit 122:
123: light source body 124:
130: a pan tilt driving part 131:
132: lateral direction turning unit 140:
141: image converting unit 142:
143: memory part 144:
145: Position signal generator 146: Trace information generator
147: object tracking unit 148:
150: motion detection sensor unit

Claims (3)

The first image acquiring unit 110 includes a wide angle camera unit 111 that photographs a designated area and a main light source unit 112 that operates together with the wide angle camera unit 111 to illuminate an image capturing area of the wide angle camera unit 111. [ ;
A narrow angle camera unit 121 for photographing a narrow area as compared with the wide angle camera unit 111 and obtaining an image having a resolution higher than that of the wide angle camera unit 111; A second image acquiring unit 120 composed of an auxiliary light source unit 122 illuminating an image pickup area of the image pickup unit 121;
A pan tilt driving unit 120 for driving the second image obtaining unit 120 in left and right and up and down directions;
An operation detecting sensor unit 150 for detecting the movement of an object in the photographing area of the wide angle camera unit 111;
An image conversion unit 141 for converting the resolution of the image acquired through the wide angle camera unit 111 to a predetermined level and converting the resolution of the image acquired through the wide angle camera unit 111 according to the detection of the motion detection sensor unit 150, A memory unit 143 for storing an image sampled through the extracting unit 142, and a memory unit 143 for comparing the images stored in the memory unit 143 with each other, A comparator 144 for comparing the RGB values of the adjacent images with each other according to a time interval to detect a change when the comparison value is equal to or greater than a preset threshold value, A tracking information generating unit 146 for generating tracking information on a moving distance and a direction with respect to a pixel in which the change determined by the comparing unit 144 is generated, Generate tracking information An object tracking unit 147 for resetting the change detection area according to the tracking information generated by the object tracking unit 147 and tracking the change; And an interlocking unit 148 for operating the pan tilt driving unit 120. The second image obtaining unit 120 and the pan tilt driving unit A control unit (140) for controlling the display unit (120); And a control unit for controlling the operation of the camera.
delete The method according to claim 1,
The auxiliary light source unit includes a light source unit 123 having an infrared LED and a power LED module, and a power control unit 124 configured to adjust the angle of light to be controlled by adjusting a distance between the light source lens and the light source unit ,
The control unit 140 is configured to control the auxiliary light source unit 122 in a predetermined pattern by determining brightness of an image photographed through the coarse camera unit 121. [ system.

Images