KR100211920B1 - Supervisory camera and watching method using the supervisory camera thereof - Google Patents

Abstract

1. Technical field to which the invention described in the claims belongs

Surveillance camera and surveillance method using the surveillance camera.

2. Technical Challenges to be Solved by the Invention

The purpose of the present invention is to solve the problem of deterioration of surveillance function caused by monitoring with a certain endurance regardless of the presence or absence of a subject in a conventional surveillance camera.

3. The point of the solution of the invention

An automatic focus adjustment unit 10 for emitting infrared rays of a predetermined intensity and receiving infrared rays reflected through the infrared ray receiving element, amplifying and integrating the infrared rays, and calculating the integrated value to calculate automatic focus adjustment data A; A key matrix unit 20 for setting a mode, setting a zoom magnification and a time interval, and setting a set pigment state; The subject is magnified and monitored at the zoom magnification and time intervals set according to the automatic focus adjustment data and the setting mode respectively obtained by the automatic focus adjustment unit 10 and the key matrix unit 20 and is displayed at a constant zoom magnification and time interval A general surveillance camera 30 for enlarging and monitoring a subject by zooming repeatedly, making a video signal under processing of an imaging video signal, encoding the video signal according to an NTSC or PAL color format, and outputting the video signal as a video signal; And a monitor (40) for monitoring a video signal output from the general monitoring camera unit (30).

4. Important Uses of the Invention

It is applied to enlarge the subject according to the presence or absence of the subject.

Description

Surveillance camera and surveillance method using its surveillance camera

Generally, a surveillance camera captures and monitors a subject at a set zoom magnification and time interval (Interval).

A conventional surveillance camera system having such a function is the same as the first embodiment.

(CCD) 2 for converting the light through the zoom lens 1 into an image pickup image signal, and an image pickup element (CCD) 2 for converting the light through the zoom lens 1 into an image pickup image signal. A video signal processing unit 3 for processing the captured video signal obtained from the video signal processing unit 3 and outputting the processed video signal as a video signal, and a control unit for controlling the video signal processing unit 3 to process luminance and color signals, A motor drive 5 for driving a motor 6 for moving a zoom lens according to a zoom lens control signal output from the system controller 4 and a video signal processor 3 An encoder 7 for encoding a video signal output from the encoder 7 according to a corresponding color format and outputting the video signal as a video signal and a monitor 8 for monitoring a video signal output from the encoder 7.

The operation of the conventional surveillance camera having such a configuration will now be described. First, when the user sets the zoom magnification, the system controller 4 generates a zoom lens control signal so that the zoom lens 1 is moved in accordance with the set zoom arrangement, and at the same time controls the image signal processing section 3, . That is, in accordance with the zoom lens control signal outputted from the system controller 4, the motor drive 5 drives the motor 6, and the motor 6 is driven to move the zoom lens 1 to a set magnification do. When the zoom lens 1 is moved to the set magnification by this operation, the optical signal of the subject through the focus lens (not shown in the drawings) is enlarged by the zoom lens 1 and is picked up by the pickup element 2 And is input to the video signal processing unit 3. The image signal processing unit 3 processes the input captured image signal, performs gamma correction, and transmits the image signal to the encoder 7 as a screen image signal. The encoder 7 encodes the input screen image signal in accordance with the NTSC or PAL color format and scans the screen image with the video signal. The monitor 8 monitors the image Monitoring is done. However, since such a conventional surveillance camera is monitored only at a predetermined zoom magnification and time interval, there is a problem that the surveillance ability of the surveillance camera, which is the inherent performance of the surveillance camera, is deteriorated.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the conventional surveillance cameras, and it is an object of the present invention to provide an infrared auto focus control unit and a key matrix to automatically adjust the zoom magnification and the time interval And a surveillance camera capable of enhancing the performance of the surveillance function by enlarging and monitoring the subject.

It is another object of the present invention to provide a surveillance camera which is capable of enhancing the performance of a surveillance function by enlarging an object by adjusting an zoom magnification and a time interval automatically according to a situation and a purpose by adding an infrared auto focus control unit and a key matrix And to provide a monitoring method.

In order to achieve the object of the present invention,

An automatic focus adjustment unit for transmitting a predetermined infrared ray pulse, receiving the reflected infrared ray through an infrared ray receiving element, amplifying and integrating the received infrared ray pulse, and calculating an integrated value thereof to calculate automatic focus adjustment data; A key matrix unit for setting a mode, setting a zoom magnification and a time interval, and setting a setting completion status; The subject is enlarged and monitored at a zoom magnification and a time interval set according to the automatic focus adjustment data and the setting mode obtained by the automatic focus adjustment unit and the key matrix unit respectively and zooming is repeated at a constant zoom magnification and time interval by the manual mode, A general surveillance camera unit for processing the captured video signal to produce a video signal, encoding the video signal according to the corresponding color format, and outputting the video signal as a video signal; And a monitor for monitoring a video signal output from the general monitoring camera unit.

A method for achieving another object of the present invention is as follows.

A first step of searching for a mode when power is supplied to the camera; If the searched mode is the automatic mode, the zoom magnification is set as the initial data, the dress gage value of the automatic focus adjustment data is set, and the automatic focus adjustment data is lost and compared with the dress gutter value to determine the presence or absence of the subject A second process; A third step of zooming the subject in accordance with the set time interval when the subject is detected in the second process, thereby enlarging the subject;

And a fourth step of reading the initial data if the mode searched in the first step is a normal mode and monitoring the subject by repeating zooming based on the set time interval.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a system block diagram of a conventional surveillance camera.

FIG. 2 is a system block diagram of a surveillance camera according to the present invention; FIG.

FIG. 3 is a detailed block diagram of the automatic focus adjustment unit of FIG. 2;

FIG. 4 is a detailed block diagram of the key matrix portion of FIG. 2; FIG.

FIG. 5 is a view showing a screen magnification of the zoom lens according to the present invention. FIG.

6 is a flowchart showing a surveillance method of a surveillance camera according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

10: automatic focus adjustment unit 20: key matrix unit

30: General surveillance camera 40: Monitor

FIG. 2 is a system block diagram of a surveillance camera according to the present invention.

As shown in FIG. 1, an automatic focusing unit 10 for emitting a predetermined infrared ray pulse, receiving reflected infrared rays through an infrared ray receiving element, amplifying and integrating the received infrared ray and calculating an integrated value thereof, ; A key matrix unit 20 for setting a mode, setting a zoom magnification and a time interval, and setting a setting completion status; The subject is enlarged and monitored at a zoom magnification and a time interval set in accordance with the automatic focus adjustment (AF) data and the setting mode obtained by the automatic focus adjustment unit 10 and the key matrix unit 20, respectively, A general surveillance camera 30 for repeatedly zooming in time intervals, processing a captured video signal to generate a screen video signal, encoding the screen video signal according to a corresponding color format, and outputting the video signal as a video signal; And a monitor (40) for monitoring a video signal output from the general monitoring camera unit (30).

The automatic focus control unit 10 includes an infrared light receiving element 11 for receiving reflected infrared pulses according to positions and outputting the reflected infrared pulses to first and second electrical signals 11 and 12, First and second battery amplifiers 12 and 13 for preamplifying the two electrical signals respectively and amplifying the signals amplified by the first and second amplifiers 12 and 13 to a predetermined level the first and the second head amplifier 14, 15 and the first and second head amplifier 14 value (15) integral to each integrating the respective amplified signal from the electrode (V _R) (V _L) A switch 18 for switching the output signal of each of the first and second integrators 16 and 17 and a second integrator 16 and 17 for switching the output of the first integrator 16 and the second integrator 17, And a data operation unit 19 for calculating the left and right integrated values and outputting automatic focus adjustment (AF) data. The key matrix unit 20 includes a mode selector 21 for selecting an automatic mode or a normal mode, a zoom key 22 for selecting a zoom magnification, a time key 23 for selecting a time interval, To set the zoom magnification or to increase or decrease the time interval Keys 24 and 25, and a set key 26 for inputting mode setting data. The general surveillance camera 30 further includes a system controller 31 for controlling the zoom magnification and the time interval according to the automatic focus adjustment (AF) data and the setting mode obtained by the automatic focus adjustment unit 10 and the key matrix unit 20, respectively A motor drive 32 for driving a motor 33 for moving the zoom lens in accordance with the zoom lens control signal output from the system controller 31, An image signal processor 36 for processing an image signal output from the image sensor 35 and outputting the image signal as a screen image signal; And an encoder 37 for encoding and outputting a screen image signal output from the display unit 40 in accordance with the corresponding color format. And FIG. 6 is a flowchart illustrating a monitoring method using a surveillance camera according to the present invention.

As shown in the figure, the first step ST1 (ST2) of coloring the mode when power is supplied to the camera; If the retrieved mode is the automatic mode, the zoom magnification (T1) (T2) is set as the initial data, the dressing value (?) Of the auto focus control data is set and then the auto focus control data (AF data) (ST3-ST6) for determining the presence or absence of a subject according to the result of comparison with the deck; (ST7-ST12); and a third step of enlarging and monitoring the subject by repeating zooming corresponding to the set time interval when the subject is detected in the second process; And a fourth step (ST13-ST19) for reading the initial data if the mode retrieved in the first step is the menu row mode and monitoring the subject by repeating zooming based on the set time interval.

Hereinafter, the operation of the surveillance camera system according to the present invention will be described.

First, the mode is selected through the key matrix unit 20 used for monitoring the subject. At this time, when the mode key 21 is initialized, the normal mode is set once when the mode key 21 is initialized, Mode is set, and when it is pressed three times, the manual mode is set. After setting the mode in this manner, the zoom key 22 is operated to set the zoom magnification. In this case, the zoom magnification is set such that the zoom magnification in the optical state of the surveillance camera is given priority, and if necessary, it is also possible to cope with the electronic zoom. That is, starting from the initial 2X (2X) Zoom blending of three times (3X), four times (4X), and six times (6X) is possible by operating the keys 24 and 25. FIG. 5 shows a screen state diagram according to the zoom magnification when the zoom lens is a triple zoom lens. Reference numeral 22a denotes a reference screen in the initial normal mode, reference numeral 22b denotes a reference screen during double zooming, and reference numeral 22c denotes a reference screen during a 3x zoom. Reference numeral 22d denotes a 4x zoom reference screen, and reference numeral 22e denotes a 6x zoom reference screen. Here, in the case where the zoom magnification is four times, it is possible to perform the electronic double zoom in the optical double. When the zoom magnification is set in this manner, the time interval (Interval Time) is next set using the time key 23. [ Here, the time interval is T1, which is the time to hold at the normal position, and T2, which is the time to hold the zoom position, and T1 and T2 are repeated by the set time interval. At this time, after pressing the time key 23 Keys 24 and 25 are operated to set the time interval.

When the mode and the zoom magnification time interval are set as described above, the set key 26 is pressed to set the set mode, the zoom magnification and the time interval in the system controller 31 in the general monitoring camera unit 30 . When the mode setting is completed, the system controller 31 reads the automatic focus adjustment data (AF data) and performs magnification monitoring of the subject. The calculation of the AF data is calculated by the automatic focus control unit 10. The calculation process of the AF data will be described in more detail as follows. First, the automatic focus adjustment unit 10 continuously transmits a predetermined infrared ray pulse through an infrared light emitting diode in an initial state without a subject, receives light according to the left and right positions by an infrared ray receiving element (PSD) 11, (11) and (12). The left signal 11 outputted in this way is pre-amplified by the first preamplifier 12 and amplified to a predetermined level by the first head amplifier 14 and then integrated in the first integrator 16 to obtain a right integrated value V _R ). The right signal 12 is pre-amplified by the second pre-amplifier 13, amplified to a predetermined level by the second head amplifier 15, and then integrated by the second integrator 17 to obtain a left integrated value V _L do. As described above, the integral values (V _R , V _L ) obtained respectively according to the left and right positions are mutually calculated by the data operation unit 19 and output as automatic focus adjustment data (AF data). That is, the data operation unit 19 determines (V _R - V _L ) / (V _R + V _L ) and determines the dressing value? Of the initial autofocusing data as a result. When the determined dress value (α) is small, the number of infrared pulses and the duty ratio of the infrared ray emitting diode are increased to obtain an appropriate dressing value, and an infrared pulse is continuously applied based on the number of pulses and the ratio And transmits the A value, which is the autofocus adjustment data, to the system controller 31. Then, the system controller 31 performs monitoring of the subject according to the automatic focus adjustment data A and the zoom magnification time interval set by the key matrix unit 20. That is, as shown in FIG. 6, the system controller 31 first determines whether the mode is the normal mode (ST1). If the mode is not the normal mode, it determines whether the mode is the automatic mode (ST2). As a result of the determination, if the zoom mode is the enlarged (automatic) mode, the initial data is read to set the zoom magnifications T1 and T2 (ST3) and the automatic focus adjustment data dress value alpha is set (ST4). Thereafter, the automatic focus adjustment data A obtained by the automatic focus adjustment unit 10 is read (ST5), and compared with the set dress value alpha (step A6) (ST6). If the auto-focus adjustment data A is greater than the dressing value? As a result of the comparison, it is determined that the subject is detected, and the motor drive 32 is driven to zoom in accordance with the zoom magnification initially set by the user (ST7). At the same time, the internal timer is driven to check the passage of time (ST8). At this time, when the elapsed time exceeds the normal-position holding time period T1 (ST9), the motor driver 32 is controlled again to return the zoom (ST10). When the elapsed time exceeds the zoom position holding time T2, the control returns to the automatic focus control data reading step ST5. The zooming is repeated according to the set time interval and magnification (ST11) (ST12). On the other hand, if the mode retrieved in step ST2 is the manual mode, the initial data is read (ST13), the internal timer is driven to check the passage of time (ST14) When the holding time T2 elapses (ST15), zooming is performed at a set magnification (ST16). Then, the internal counter is driven again to check the passage of time (ST17). At this time, when the elapsed time passes the normal position holding time T1 (ST18), the zoom returns (ST19). This operation is repeated to perform the enlargement (manual) mode. The zoom lens 34 is controlled by the above operation and the optical signal of the subject through the zoom lens 34 is converted into an image pickup image signal through the image pickup element 35, Processed by the signal processor 36 and output as a screen image signal. The screen image signal thus outputted is encoded by the encoder 37 in accordance with the corresponding color format and is then scanned and monitored by the monitor 40, thereby enlarging and monitoring the subject.

As described above, the present invention has an effect of improving the performance of detecting a subject, which is a function inherent to a surveillance camera, by enlarging and monitoring the subject at a zoom magnification and time intervals set according to whether or not the subject is detected. Further, there is an effect that it is possible to monitor enlargement of a subject by repeatedly zooming at a constant magnification and time interval according to a manual mode as well as an operation mode in which the presence or absence of a subject is detected and set by the mode setting.

The present invention relates to a surveillance camera. More particularly, the present invention relates to a surveillance camera, and more particularly to a surveillance camera in which an infrared auto focus control unit and a key matrix are added to automatically monitor zoom magnification and time interval And a monitoring method using the surveillance camera.

Claims (9)

The surveillance camera monitors a subject at a fixed zoom magnification. The surveillance camera transmits a certain infrared ray pulse, receives reflected infrared rays through an infrared ray receiving element, amplifies and integrates the received infrared ray, An automatic focus adjustment unit 10 for calculating an auto focus adjustment value; A key matrix unit 20 for setting a mode, setting a zoom magnification and a time interval, and setting a setting completion status; The automatic focus adjustment data setting mode obtained by the automatic focus adjustment unit 10 and the key matrix unit 20 and zoom magnification and time intervals are used to enlarge and monitor the subject and process the image signal to generate a screen image signal, And outputting the video signal as a video signal; And a monitor (40) for monitoring a video signal output from the general monitoring camera unit (30). The apparatus according to claim 1, wherein the automatic focal point adjusting unit (10) comprises: an infrared ray receiving element (11) which receives reflected infrared pulses according to positions and outputs the received first and second electric signals (11) First and second preamplifiers 12 and 13 for constantly amplifying the first and second electrical signals, and a second preamplifier 12 for amplifying the preamplified signals in the first and second preamplifiers 12 and 13, respectively, The first and second head amplifiers 14 and 15 amplify the amplified signals at a predetermined level and the amplified signals at the first and second head amplifiers 14 and 15, and V _R) (the first and second integrators 16 and 17 and the first and second integrator (switch 18 for switching the respective output signals 16, 17) for outputting a V _L), And a data operation unit (19) for mutually calculating the left and right integrated values switched by the switch (18) and outputting automatic focus adjustment (AF) data (A). The apparatus of claim 1, wherein the key matrix unit (20) comprises a mode selector (21) for selecting an automatic mode or a normal mode, a zoom key (22) for selecting a zoom scale, a time Key 23 for zooming, and for increasing or decreasing the zoom magnification or time interval A key (24) (25), and a set key (26) for inputting mode setting data. 2. The apparatus according to claim 1, wherein the general surveillance camera unit (30) comprises automatic focus adjustment (AF) data (A) obtained by the automatic focus adjustment unit (10) and the key matrix unit (20) And a motor 33 for moving the zoom lens 34 in accordance with a control signal output from the system controller 31. The system controller 31 controls the magnification of the zoom lens 34, An image pickup device 35 for converting an optical signal of an object enlarged through the zoom lens 34 to an image pickup image signal; and an image pickup device 35 for picking up an image pickup image 35 outputted from the image pickup device 35 And an encoder 37 for encoding and outputting a screen image signal output from the image signal processor 36 according to a color format of the image signal. A sense of being City Camera. The data arithmetic unit (19) according to claim 2, the left light-receiving signal is the V _L, such as a V _R the right light-receiving signal (V _R - V _L) / (V _R + V _L) by auto-focus adjustment to the results And calculates data (AF data). A first step (ST1) (ST2) of searching for a mode when the camera is powered on; If the retrieved mode is the automatic mode, the zoom magnification T1 and T2 are set as the initial data, and the automatic focus control data (AF data) (ST3-ST6) for judging the presence or absence of the subject according to the result of the comparison; A third step (ST7-ST12) of zooming the subject in accordance with the set time interval when the subject is detected in the second process, thereby enlarging the subject; And a fourth step (ST13-ST19) of reading the initial data if the mode searched in the first step is a manual mode and monitoring the subject by repeating zooming based on the set time interval . 7. The method according to claim 6, wherein the second step (ST3-ST6) further comprises the steps of: (ST3) reading initial data and setting zoom magnifications (T1, T2) (ST4) of setting the focal adjustment data dress value (alpha), a step (ST5) of reading the automatic focus adjustment data (A), and a step (ST6) of detecting the presence or absence of a subject by comparing the detected position of the subject with the detected position of the subject. The method according to claim 6, wherein the third step (ST7-ST12) comprises: a step (ST7) of performing zooming in accordance with an initial setting magnification; a step (ST8) (ST10) of returning the zoom when the time elapsed in the step ST9 exceeds the normal position holding time T1 and a step ST11 (ST12) of checking the elapsed time after the zoom return A surveillance method using a surveillance camera. The method as claimed in claim 6, wherein the fourth step (ST13-ST19) further comprises the steps of: (ST13) reading initial data if the mode mode is the manual mode mode retrieved in the first step, (ST15) of performing zooming at a constant magnification when the time elapsed in the step ST15 exceeds the zoom position holding time T2 (ST15); and (ST15) (ST17) (ST18) of driving an internal counter to check the elapsed time, and returning the zoom when the elapsed time T1 of the cigarette normal position elapsed in the step ST18 elapses (ST19) A monitoring method using a surveillance camera.