JP2006148300A - Photographing apparatus and photographing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high security photographing apparatus detecting the occurrence of abnormity such as a mischief applied to a lens by an unauthorized person or a failure, and also to provide a photographing system. <P>SOLUTION: The photographing apparatus includes: a photographing section for carrying out photographing; a focus adjustment section for carrying out focus adjustment of the photographing section; a history information storage section 22 for storing history information of the focus adjustment by the focus adjustment section; and an abnormity detection section 21 for detecting the abnormity on the basis of the history information of the focus adjustment stored in the history information storage section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a photographing apparatus such as a monitoring camera apparatus and a photographing system using the same.

  Conventionally, techniques relating to various monitoring camera apparatuses have been proposed. Especially in an apparatus that monitors day and night, while in the daytime, an infrared light cut filter that selectively transmits visible light and absorbs infrared light is placed on the front surface of the image sensor to shoot. When shooting at night, the infrared light cut filter placed in front of the image sensor is removed, and shooting including light in the infrared region is taken to increase nighttime shooting sensitivity. Techniques for improving nighttime monitoring accuracy have been proposed.

  In the monitoring camera device having such a configuration, the optical path length differs depending on the presence or absence of an infrared light cut filter when photographing using visible light and when photographing using infrared light, for example, Due to the configuration optimized for the optical path length at the time of photographing with visible light, there has been a problem that the photographed image is blurred when photographing with infrared light is performed.

In order to solve such a problem, for example, when the infrared light cut filter is disposed on the optical path and retracted from the optical path, the image sensor is automatically moved in the direction of the optical axis. There has been proposed a surveillance camera device capable of correcting a difference in optical path length during photographing of visible light and infrared light and obtaining a sharp image regardless of day or night (see, for example, Patent Document 1). ).
JP 2003-274229 A

  However, in the surveillance camera device as described in Patent Document 1 described above, when shooting is switched between day and night, the degree of focus is calculated using a predetermined frequency component of the photographed image, and the position with the highest degree of focus is obtained. An image sensor is arranged in Therefore, when shooting is switched between day and night, even if an unauthorized person has an irregularity such as tampering with the lens or a malfunction, the imaging device will be placed in an appropriate position and shooting will continue. An image that cannot be captured is taken, and the abnormality is not detected until the administrator of the surveillance camera device sees the recorded image later, so there is a problem in security.

  The present invention has been made in view of such a problem, and even when an abnormality such as a mischief or failure of a lens by an unauthorized person occurs, a highly secure photographing apparatus capable of detecting the abnormality. And an imaging system.

  An imaging apparatus according to the present invention includes an imaging unit that performs imaging, a focus adjustment unit that performs focus adjustment of the imaging unit, a history information storage unit that stores history information of focus adjustment of the focus adjustment unit, and a history information storage unit that stores the history information. And an abnormality detection unit that detects an abnormality based on the focus adjustment history information.

  With such a configuration, an abnormality can be detected based on the focus adjustment history information, so even if an unauthorized person has an abnormality such as a tampering or malfunction of the lens, the abnormality can be detected. A highly secure configuration can be realized.

  The abnormality detection unit compares the past history information stored in the history information storage unit with the latest history information of the focus adjustment by the focus adjustment unit, and detects an abnormality based on the difference. Also good.

  According to such a configuration, it is possible to realize a configuration capable of detecting an abnormality with a simple configuration of comparing past history information and current history information.

  Further, when an abnormality is detected by the abnormality detection unit, a configuration may be provided that includes an abnormality cause determination unit that determines the cause of the abnormality detected based on the history information stored in the history information storage unit. .

  According to such a configuration, the cause of the abnormality being detected can be determined based on the history information, so that a configuration that is highly convenient for the user can be realized.

  The photographing unit has an image sensor, and the focus adjustment unit calculates an in-focus degree from an image sensor driving unit that moves the image sensor in the optical axis direction and an in-focus degree from an image photographed by the photographing unit. And a drive control unit that controls the image sensor driving unit so that the in-focus level is the highest.

  According to such a configuration, since the focus adjustment can be performed by moving the image sensor in the optical axis direction, it is possible to capture a sharp image even when a fixed focus lens is used as an optical system. It is.

  Further, the history information may be configured to include a focus degree value when the focus adjustment is completed, and AF position information indicating the position of the image sensor when the focus adjustment is completed.

  According to such a configuration, it is possible to further detect the abnormality and determine the cause thereof using easily obtainable information such as the degree of focus or AF position information.

  Further, the history information may be configured to include an initial average value and a latest average value of the degree of focus, and an initial average value and a latest average value of the AF position information.

  According to such a configuration, it is possible to detect the occurrence of an abnormality due to a temporal change of the lens or the device by comparing the initial average value with the latest average value.

  Further, the photographing unit has a filter unit including an infrared light cut filter unit movable in a direction perpendicular to the optical axis, and the focus adjustment unit is configured to perform focus adjustment when the filter unit is moved. There may be.

  According to such a configuration, it is possible to realize a photographing apparatus capable of photographing regardless of day and night, particularly a photographing apparatus suitable for monitoring purposes.

  Further, an AF start instruction unit that starts focus adjustment with respect to the focus adjustment unit may be provided, and the focus adjustment unit may be configured to start focus adjustment based on an instruction from the AF start instruction unit.

  According to such a configuration, it is possible to realize a configuration capable of starting focus adjustment under various conditions.

  Further, the AF start instruction unit has an illuminance change detection unit that detects a predetermined illuminance change, and when the illuminance change detection unit detects the illuminance change, the AF start instruction unit causes the focus adjustment unit to start focus adjustment. Good.

  According to such a configuration, it is possible to realize a configuration suitable for a photographing apparatus in which the focus is shifted according to the surrounding brightness.

  In addition, the AF start instruction unit has a temperature change detection unit that detects a predetermined temperature change, and when the temperature change detection unit detects a temperature change, the AF adjustment instruction unit causes the focus adjustment unit to start focus adjustment. Good.

  According to such a configuration, it is possible to realize a configuration suitable for a photographing apparatus in which the focus is shifted due to a change in ambient temperature.

  Further, the AF start instruction unit may have an input switch unit, and may cause the focus adjustment unit to start focus adjustment when there is an input from the input switch unit.

  According to such a configuration, it is possible to realize a configuration capable of performing the focus adjustment when the user of the apparatus desires.

  The AF start instruction unit includes a luminance change detection unit that detects a predetermined luminance change of an image captured by the imaging unit. When the predetermined luminance change is detected by the luminance change detection unit, a predetermined luminance change is detected. The focus adjustment unit may be instructed to delay the start of time focus adjustment.

  According to such a configuration, since focus adjustment is not performed when the luminance change is large, more stable focus adjustment can be realized.

  Further, the AF start instruction unit includes a motion detection unit that detects the movement of the subject in the image captured by the imaging unit. When the motion detection unit detects the movement of the subject, the AF start instruction unit performs focus adjustment for a predetermined time. The focus adjustment unit may be instructed to delay the start.

  According to such a configuration, focus adjustment is not performed when the movement of the subject is large, so that more stable focus adjustment can be performed.

  The photographing unit may include a diaphragm unit and a diaphragm drive unit that performs opening / closing drive of the diaphragm unit, and the focus adjustment unit may perform a focus adjustment by opening the diaphragm unit with respect to the diaphragm drive unit. .

  According to such a configuration, since the focus adjustment is performed in a state where the depth of field of the optical system is shallow, a sharp image can be captured in a wider range when performing normal shooting after the focus adjustment. it can.

  Next, the imaging system of the present invention was photographed by the imaging device of the present invention, an input device having a focus adjustment instruction unit that instructs the focus adjustment unit of the imaging device to start focus adjustment, and the imaging device. In the case where an abnormality is detected by the image and the abnormality detection unit, a display unit for displaying the fact is provided.

  According to such a configuration, an abnormality can be detected based on the focus adjustment history information. Therefore, even when an unauthorized person has an abnormality such as tampering with the lens or a malfunction, the abnormality is detected. Thus, a highly secure configuration that can be displayed on the display device can be realized. Furthermore, the focus can be adjusted from the input device, and a configuration that is highly convenient for the administrator can be realized.

  The imaging system of the present invention also includes an input device having the imaging device of the present invention, a focus adjustment instruction unit that instructs the focus adjustment unit of the imaging device to start focus adjustment, and an image captured by the imaging device. In the case where an abnormality is detected by the abnormality detection unit, there is a message to that effect, and if the cause of the abnormality is determined by the abnormality cause determination unit, the display unit displays the cause.

  According to such a configuration, it is possible to detect an abnormality based on the history information of focus adjustment and determine the cause thereof, so even when an irregularity such as a tampering or malfunction of the lens by an unauthorized person occurs Therefore, it is possible to realize a highly secure configuration capable of detecting the abnormality and displaying the cause on the display device. Furthermore, the focus can be adjusted from the input device, and a configuration that is highly convenient for the administrator can be realized.

  As described above, since the imaging device and imaging system of the present invention can detect an abnormality based on the history information of focus adjustment, when an abnormality such as a tampering or malfunction of the lens by an unauthorized person occurs In addition, it is possible to realize a highly secure configuration that can detect the abnormality.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment)
FIG. 1 is a block diagram showing a configuration of a surveillance camera system 50 according to an embodiment of the present invention. As shown in FIG. 1, a surveillance camera system 50 according to an embodiment of the present invention is connected to a surveillance camera device 1 having a lens unit 2 and an input switch unit 20, and the surveillance camera device 1. The display device 30 having the display unit 35 for displaying information including the displayed image, and the monitor camera device 1 are connected to the monitor camera device 1 and input various instructions including focus adjustment as will be described later. An input device 40 having a keyboard 41 and a focus adjustment instruction unit 42 is provided.

  The surveillance camera device 1 of the surveillance camera system 50 according to the embodiment of the present invention detects the brightness of the surroundings by the configuration and method described later, and when the surroundings are relatively bright, the infrared light cut filter is used as the light of the lens unit 2. When the periphery is relatively dark, the infrared light cut filter is retracted from the optical axis when the periphery is relatively dark, so that monitoring can be performed regardless of the brightness of the periphery.

  The monitoring camera device 1 of the monitoring camera system 50 according to the embodiment of the present invention performs focus adjustment (hereinafter, referred to as “focus adjustment” below) in order to correct the optical path length when the infrared light cut filter is switched. AF adjustment or AF processing is also performed (hereinafter, this focus adjustment is referred to as “auto adjustment”). In addition, the focus adjustment of the monitoring camera device 1 can be performed by operating the input switch unit 20 provided in the monitoring camera device 1 or the focus adjustment instruction unit 42 of the input device 40. Specifically, the focus adjustment is performed by pressing the AF adjustment button 46 of the monitoring camera device 1 or the AF adjustment button 45 of the input device 40 (hereinafter, this focus adjustment is referred to as “one push adjustment”). ). Further, the administrator of the monitoring camera system 50 looks at the guidance display 33 displayed on the display unit 35 of the display device 30 and the actually photographed image while using the manual adjustment button 44 or the input device 40 of the monitoring camera device 1. By depressing the manual adjustment button 43, the administrator can perform focus adjustment (hereinafter, this focus adjustment is referred to as “manual adjustment”).

  Further, in the monitoring camera system 50 according to the embodiment of the present invention, the monitoring camera device 1 detects an abnormality based on the history information of focus adjustment and detects an abnormality in the monitoring camera device 1 by the configuration and method described later. It is possible to cause the display device 30 to display the cause of the occurrence of an abnormality and the abnormality for which the cause can be determined.

  In the surveillance camera system 50 according to the embodiment of the present invention, the lens unit 2 attached to the surveillance camera device 1 is a fixed-focus lens, and the opening and closing of the aperture unit 3 is provided in the surveillance camera device 1. A lens of a type controlled by a drive control unit 10 (not shown in FIG. 1), that is, a lens generally called an automatic iris lens is used.

  Further, as the display device 30 of the surveillance camera system 50 in the embodiment of the present invention, a monitor device using a CRT is used as a display device, but various known display devices such as liquid crystal, EL or PDP are used. Is also possible.

  Further, as the input device 40 of the surveillance camera system 50 according to the embodiment of the present invention, a direct key that can be input by pressing is used as an input device. Various known devices such as a mouse, a trackball, or a trackpad are used. It is also possible to use an input device. Similarly, various known input devices can be used for the input switch unit 20 of the monitoring camera device 1 and the focus adjustment instruction unit 42 of the input device 40.

  In addition, the guidance display 33 displayed on the display device 30 of the surveillance camera system 50 according to the embodiment of the present invention has a correlation between the current focus position, the manual adjustment button 44 or the manual adjustment button 43, and the focus direction ( In the example shown in FIG. 1, the current focus position is approximately at the center position. When the right manual adjustment buttons 43 and 44 are pressed, the focus is closer, and when the left manual adjustment buttons 43 and 44 are pressed, the distance is farther. Indicates that the subject is in focus.)

  Here, the configuration of the monitoring camera device 1 in the monitoring camera system 50 according to the embodiment of the present invention will be described in detail with reference to FIG. FIG. 2 is a block diagram illustrating a configuration of the monitoring camera device 1 according to the embodiment of the present invention. The surveillance camera device 1 according to the embodiment of the present invention selectively absorbs a light beam in the infrared region among the light beam transmitted through the lens unit 2 and the lens unit 2 having the diaphragm unit 3 driven by the diaphragm drive unit 51. The filter unit 4 and the filter unit 4 have an infrared light cut filter 62 and a frame body unit 61 that selectively transmit light in the visible region, and are movable in a direction perpendicular to the optical axis (the vertical direction in FIG. 2). Image sensor 5 that photoelectrically converts a light beam that has passed through and outputs an electrical signal, an image sensor moving unit 6 that moves the image sensor 5 in a direction parallel to the optical axis (left and right direction in FIG. 2), and imaging by the image sensor 5 An origin detection unit 52 that detects the origin on the element moving unit 6, a video signal processing unit 7 that performs processing including electronic shutter processing on the electrical signal output from the image sensor 5 and outputs a video signal, a video signal processing A degree-of-focus calculation unit 9 that calculates a degree of focus from a video signal output from the unit 7 by a method that will be described later, and a luminance that determines whether there is a change in luminance from a video signal output from the video signal processing unit 7 by a method that will be described later A change determination unit 16, a motion detection unit 17 that performs motion detection processing from a video signal output from the video signal processing unit 7 by a method described later, an illuminance change detection unit 18 that detects a change in ambient illuminance of the monitoring camera device 1, and monitoring A temperature change detection unit 19 that detects a change in ambient temperature of the camera device 1, an input device 40, an input switch unit 20 provided in the monitoring camera device 1, a luminance change determination unit 16, a motion detection unit 17, and an illuminance change detection unit 18. Based on the output from the temperature change detection unit 19, the AF processing determination unit 15 and AF processing determination unit 15 determine whether or not to perform focus adjustment by a method described later. When it is determined that the adjustment is performed, the driving of the aperture driving unit 51, the filter driving unit 12, the image sensor driving unit 13, and the shutter driving unit 14 is referred to while referring to the focusing value calculated by the focusing value calculating unit 9. The drive control unit 10 that performs control, the filter drive unit 12 that drives the filter unit 4 based on the drive signal from the drive control unit 10, and the image sensor 5 based on the drive signal from the drive control unit 10 The imaging device driving unit 13 that is driven to move up, the shutter driving unit 14 that controls the shutter speed in the video signal processing unit 7 based on the driving signal from the driving control unit 10, and the focus performed by the driving control unit 10 Based on the history information storage unit 22 for storing the later-described adjustment history information, the input from the input device 40 or the history information stored in the history information storage unit 22 The abnormality detection unit 21 that detects an abnormality by the above-described method, and an abnormality that determines the cause of the abnormality being detected based on the history information stored in the history information storage unit 22 when the abnormality detection unit 21 detects an abnormality. The video signal output from the cause determination unit 23 and the video signal processing unit 7 and information indicating the cause of the abnormality detected by the abnormality cause determination unit 23 are output to the display device 30 and the AF from the input device 40 The communication control unit 8 that inputs information to the process determination unit 15 or the abnormality detection unit 21, the communication control unit 8 and the display device 30, the connector 31 that connects the communication control unit 8 and the input device 40, and driving A connector 32 is provided to connect the control unit 10 and the diaphragm unit 3 of the lens unit 2.

  Here, each component of the surveillance camera device 1 in the embodiment of the present invention will be described in more detail.

  The filter unit 4 of the surveillance camera device 1 according to the embodiment of the present invention can be switched by moving the frame unit 61 and the infrared light cut filter 62 in a direction perpendicular to the optical axis direction by the filter driving unit 12. Is provided. In addition to the infrared light cut filter 62, a low-pass filter may be arranged in order to suppress the moire phenomenon between the arrangement pattern of the image sensor and the image. As the filter driving unit 12, for example, a DC motor can be used. If the filter unit 4 can be moved, the present invention is not limited to this configuration, and it goes without saying that various known drive means such as various motors can be used. When the infrared light cut filter 62 of the filter unit 4 is arranged on the optical axis, that is, the state shown in FIG. 2 is a state where a visible light image is captured (such as in the daytime, the surroundings are bright). . A material having a small wavelength selection characteristic, for example, glass is disposed in a portion where the light beam from the lens unit 2 of the frame unit 61 is transmitted, and a frame is formed around the material. Therefore, the state in which the frame body portion 61 is located on the optical axis is a state in which an infrared image can be taken in addition to visible light (suitable for dark surroundings such as at night).

  As the image sensor 5 of the monitoring camera apparatus 1 in the embodiment of the present invention, a known device such as a CCD or a CMOS sensor can be used. In the surveillance camera device 1 according to the present embodiment, a lead screw is used as the image sensor moving unit 6 for moving the image sensor 5, the image sensor 5 is attached to the nut portion with respect to the lead screw, and the image sensor moving unit 6 is driven. A stepping motor is used as the image sensor driving unit 13 that performs the above operation. According to such a configuration, it is possible to move the image sensor 5 in the optical axis direction by rotating the lead screw as the image sensor moving unit 6 by the rotation of the stepping motor as the image sensor driving unit 13.

  Further, by using a stepping motor as the image sensor drive unit 13, the position of the image sensor 5 at the time of focus adjustment can be stored in a storage unit (not shown) or accurately controlled. The image sensor moving unit 6 is provided with an origin detection unit 52 for detecting the origin of the position of the image sensor 5. As the origin detection unit 52, for example, a photo interrupter can be used. The present invention is not limited to the configuration of the image sensor moving unit 6, the image sensor driving unit 13, and the origin detection unit 52 described above, and the image sensor 5 can be moved in parallel to the optical axis direction. Any other known configuration can be used as long as the position of the element 5 can be detected.

  The video signal processing unit 7 performs image processing such as electronic shutter processing on the electrical signal output from the image sensor 5 and outputs the result as a video signal of a moving image.

  As communication control in the communication control unit 8, for example, image transmission is performed by a known moving image communication control method, and data communication control such as a signal indicating an abnormality of the monitoring camera device 1 is performed by a communication method using RS485 or the like. Can do.

  The focus value calculation unit 9 calculates a focus value from the video signal output from the video signal processing unit 7. Various known methods can be used as a method for calculating the in-focus value. For example, by using the fact that a sharp image in focus has a higher amount of high-frequency components in the image compared to a blurred image that is not in focus, the focus value calculation unit 9 uses the predetermined value of the video signal. The high-frequency components are extracted, and the values of the high-frequency components are integrated to calculate the in-focus value. In this case, the larger the in-focus value, the more in-focus (a sharp image), and the smaller the in-focus value, the more out-of-focus (the blurred image).

  The illuminance change detection unit 18, the temperature change detection unit 19, and the input switch unit 20 are each a start trigger that causes the AF process determination unit 15 of the monitoring camera device 1 to start focus adjustment. On the other hand, the luminance change determination unit 16 and the motion detection unit 17 have a function of instructing the AF processing determination unit 15 of the monitoring camera device 1 to delay the start of focus adjustment when a luminance change or motion is detected. .

  The luminance change determination unit 16 determines whether or not there is a large luminance change in the image in the video signal output from the video signal processing unit 7. When there is a large change in luminance, for example, at night, when a high-luminance subject such as a car light or a flashlight enters or exits the screen, this is the case. In this case, it is difficult to adjust the focus to an optimal position due to the influence of a high-luminance subject. Therefore, the luminance change determination unit 16 outputs to the AF processing determination unit 15 that the luminance change has been detected, and the AF processing determination unit 15 delays the start of focus adjustment until there is no luminance change or for a predetermined time. . Various known methods can be used as a method of determining the luminance change in the luminance change determining unit 16. For example, the luminance change determination unit 16 stores an average value of luminance values of all pixels in the image, and can determine that there is a luminance change when the luminance value change exceeds a predetermined threshold value. It is.

  The motion detection unit 17 determines whether or not there is a large motion in the image in the video signal output from the video signal processing unit 7. The case where there is a large movement is, for example, a case where the subject is moving on the screen, and in such a case, the subject moves particularly in a direction away from or closer to the lens unit 2. Therefore, it is difficult to adjust the focus to the optimum position due to the influence. Therefore, the motion detection unit 17 outputs to the AF process determination unit 15 that the motion is detected, and the AF process determination unit 15 delays the start of focus adjustment for a predetermined time until no motion is detected. Various known methods can be used as the motion detection method in the motion detection unit 17. For example, the motion detection unit 17 differentiates the amount of change in luminance for each pixel in the image, and determines that the motion has been detected when there are a certain number or more of pixels whose value exceeds a predetermined threshold. Is possible.

  The illuminance change detection unit 18 is used to determine whether the time zone at the time of shooting is daytime or nighttime by measuring the illuminance around the monitoring camera device 1. As described above, since the wavelength of light used for photographing differs between daytime and nighttime, it is desirable to perform focus adjustment again when the time zone is switched. As an example of the illuminance change detection unit 18, an illuminometer attached to the monitoring camera device 1 can be used. Further, when the average luminance value of the entire image of the video signal output from the video signal processing unit 7 is used for a certain period of time when the average luminance value is higher than a predetermined threshold, the time zone is daytime. It is also possible to determine that the periphery is night when the average luminance value is lower than a predetermined threshold for a certain period of time. When the judgment result of the time zone at the time of shooting changes due to the change in illuminance (that is, in the case of “daytime” → “nighttime” or “nighttime” → “daytime”), the illuminance change detection unit 18 has an illuminance change. To the AF processing determination unit 15.

  The temperature change detection unit 19 is used to measure the ambient temperature of the monitoring camera device 1. By measuring the ambient temperature, it is possible to estimate the time zone at the time of shooting in the same manner as the illuminance change detection unit 18, and as described above, the wavelength of light used for shooting differs between daytime and nighttime. When the time zone is switched, it is desirable to adjust the focus again. As the temperature change detection part 19, the thermometer attached to the monitoring camera apparatus 1 can be used, for example. When the temperature is higher than a predetermined threshold by the thermometer, it can be determined that the shooting time is daytime, and when the temperature is lower than the predetermined threshold, it is determined that the shooting time is nighttime. It is also possible. When the judgment result of the time zone at the time of shooting changes due to the temperature change (that is, in the case of “daytime” → “nighttime” or “nighttime” → “daytime”), the temperature change detection unit 19 has a temperature change. To the AF processing determination unit 15. In addition, by using the temperature change detection unit 19, even when the refractive index of the optical system as the lens unit 2 has a temperature characteristic, a configuration capable of starting the focus adjustment by the temperature change can be realized.

  As the input switch unit 20, a known push switch provided in the monitoring camera device 1 can be used.

  In the monitoring camera device 1 according to the embodiment of the present invention, the configuration including the illuminance change detection unit 18 and the temperature change detection unit 19 is described as a component for determining the switching time zone of the filter unit 4. The present invention is not limited to this configuration. By providing the illuminance change detection unit 18 or the temperature change detection unit 19, it is possible to determine the switching time zone of the filter unit 4.

  Here, the function of the AF process determination unit 15 in the monitoring camera device 1 according to the embodiment of the present invention will be described in detail. First, the case where the monitoring camera device 1 is in the “automatic adjustment” mode, that is, the case where the focus adjustment is automatically performed according to the brightness of the surroundings will be described. In this case, the AF processing determination unit 15 is driven when information indicating that the illuminance change is detected from the illuminance change detection unit 18 or information indicating that the temperature change is detected from the temperature change detection unit 19 is input. The control unit 10 is caused to start focus adjustment. At this time, either the information indicating that the AF process determining unit 15 has detected the luminance change in the image from the luminance change determining unit 16 or the information indicating that the motion is detected in the image by the motion detecting unit 17 is described above. If it is input together with information on either illuminance change or temperature change, focus adjustment is not performed immediately, and focus adjustment is performed after waiting for a predetermined time or until the brightness change or movement is reduced to some extent. Then, the AF process determination unit 15 instructs the drive control unit 10 (hereinafter, the process of performing the focus adjustment after waiting in this manner is referred to as “redo process”). At this time, information indicating that the monitoring camera device 1 is in the “automatic adjustment” mode is also sent to the drive control unit 10. In the “automatic adjustment” mode, the focus adjustment described above is also performed when the power of the monitoring camera device 1 is turned on.

  Next, when the surveillance camera device 1 is in the “one push adjustment” mode, that is, when either the AF adjustment button 46 of the surveillance camera device 1 or the AF adjustment button 45 of the input device 40 is pressed, the AF processing determination unit 15 Regardless of the input, the drive control unit 10 starts focus adjustment. At this time, information indicating that the monitoring camera device 1 is in the “one-push adjustment” mode is also sent to the drive control unit 10. By providing such a mode, when the administrator of the surveillance camera system 50 feels the necessity of focus adjustment such as when the surveillance camera device 1 is installed or the image of the display device 30 is blurred, Focus adjustment can be performed.

  In addition, in the “manual adjustment” mode, that is, when either the manual adjustment button 44 of the monitoring camera device 1 or the manual adjustment button 43 of the input device 40 is pressed, the AF process determination unit 15 relates to other inputs. First, the drive control unit 10 is instructed to perform the focus adjustment in the direction input by the manual adjustment buttons 43 and 44. At this time, information indicating that the monitoring camera device 1 is in the “manual adjustment” mode is also sent to the drive control unit 10. By providing such a mode, the administrator of the monitoring camera system 50 can adjust the focus in a desired direction by looking at the image on the display device 30 and the guidance display 33.

  When receiving an instruction from the AF process determination unit 15, the drive control unit 10 performs drive control of the diaphragm drive unit 51, the image sensor drive unit 13, or the filter drive unit 12 in accordance with the instruction. First, in the “auto adjustment” mode, when receiving a focus adjustment instruction from the drive control unit 10, the drive control unit 10 drives the filter drive unit 12 to switch the filter unit 4. When changing from “daytime to nighttime”, switching is performed so that the frame body 61 is positioned on the optical axis. When changing from “nighttime to daytime”, an infrared light cut filter is set on the optical axis. It arrange | positions so that 62 may be located.

  Next, the drive control unit 10 instructs the image sensor drive unit 13 to move the image sensor 5 to a position where the focus value output from the focus value calculation unit 9 is the highest. As a drive control method for the image sensor drive unit 13 at this time, a so-called “mountain climbing method” can be used, but other known methods may be used. When performing the focus adjustment, the drive control unit 10 controls the aperture driving unit 51 so as to fully open the aperture unit 3 and the shutter driving unit 14 so as to increase the shutter speed of the video signal processing unit 7. Since the focus adjustment can be performed in the state where the depth of field of the lens system is the narrowest, an image focused in a wider range can be obtained when actually shooting.

  Further, in the monitoring camera device 1 according to the embodiment of the present invention, when the optimum position of the image sensor 5 is not determined even when it takes a predetermined time (for example, 30 seconds) during focus adjustment, the drive control unit 10. Moves the image sensor 5 to a preset focus position for each time zone, which is stored in advance in a storage unit (not shown), and ends the process (hereinafter, adjustment by such a preset value is referred to as “preset adjustment”). "). By performing such focus adjustment, for example, even when a subject suddenly appears on the screen, a sharp image of the entire screen can be obtained according to the brightness of the surroundings.

  In the “one-push adjustment” mode or the “manual adjustment” mode, the drive control unit 10 issues a focus adjustment instruction to the image sensor drive unit 13 and does not drive the filter unit 4. This is because it is not necessary to switch the filter unit 4 because the necessity of focus adjustment is not due to ambient brightness.

  Further, in the monitoring camera device 1 according to the embodiment of the present invention, history information of the focus adjustment performed by the drive control unit 10 is stored in the history information storage unit 22. The history information storage unit 22 can be configured using, for example, an EPROM, but various other known recording media such as an EEPROM, a RAM, and an HDD can be used as the storage medium.

  Here, an example of the history information stored in the history information storage unit 22 of the monitoring camera device 1 according to the embodiment of the present invention will be described. FIG. 3 is a diagram illustrating an example of history information stored in the history information storage unit 22 of the monitoring camera device 1 according to the embodiment of the present invention.

  FIG. 3 shows an example of the item name, contents, and number of data of history information stored in the history information storage unit 22 of the monitoring camera device 1 according to the embodiment of the present invention. In order from the top, first, the power ON number A is the cumulative number of times the power of the monitoring camera device 1 is turned on since the factory shipment. The origin search movement step number B indicates the number of movement steps required in performing the origin search of the image sensor 5 using the origin detection unit 52 when the power of the monitoring camera device 1 is turned on. The AF position coordinate C indicates the number of steps of the position of the image sensor 5 when the focus adjustment is completed. The focus degree value D indicates the value of the focus degree from the focus value calculation unit 9 when the focus adjustment is completed. The movement step number E indicates the total number of movement steps required when performing the focus adjustment. The AF adjustment redo count F indicates the number of times the above-mentioned “redo process” has been performed during focus adjustment. The drive type G is information indicating the mode when focus adjustment is performed (for example, “1” for “automatic adjustment”, “2” for “one-push adjustment”, and “manual adjustment”. “3”, “4” for “preset adjustment”.

  In the monitoring camera device 1 according to the embodiment of the present invention, the origin search moving step number B, the AF position coordinate C, the focus degree value D, the moving step number E, the AF adjustment re-doing number F, and the drive type G are set. The information stores the data at the time of focus adjustment for a total of 20 times, the latest 10 times for each time zone of “daytime” and “nighttime”. Here, the data of the “daytime” time zone indicates data at the time of focus adjustment in a state where the infrared light cut filter 62 of the filter unit 4 is arranged on the optical path. The “night” data indicates data at the time of focus adjustment in a state where the infrared light cut filter 62 of the filter unit 4 is retracted from the optical path.

  As history information stored in the history information storage unit 22, the AF position coordinate average value (initial) H is an average value for each time zone of the initial data of the AF position coordinates C from the time of factory shipment, The value which averaged the value for 10 times for every time slot | zone is stored. The in-focus degree average value (initial) I is an average value of the above-described in-focus degree value D for 10 times for each time zone of initial data from the time of factory shipment. The AF position coordinate average value (latest) J is a value obtained by averaging the latest 10 times for each time zone of the AF position coordinates C described above. The in-focus degree average value (latest) K is an average value for the latest ten times for each time zone of the in-focus degree value D described above. The number of AF adjustments (cumulative) L indicates the number of times of focus adjustment performed for each time zone. In the monitoring camera device 1 according to the embodiment of the present invention, since there are two types of time zones, “daytime” and “nighttime”, the AF position coordinate average value (initial) H and the focus degree average value (initial) I , AF position coordinate average value (latest) J, focus degree average value (latest) K, and AF adjustment count (cumulative) L each have two pieces of data.

  Note that the history information to be stored in the history information storage unit 22 may include cumulative time during which the power of the surveillance camera device 1 is turned on, in addition to the information described above.

  The abnormality detection unit 21 of the surveillance camera device 1 according to the embodiment of the present invention will be described later when there is an input indicating an abnormality by the administrator from the input device 40 or from history information stored in the history information storage unit 22. When it is detected that there is an abnormality in the monitoring camera device 1 by performing the processing, the abnormality cause determination unit 23 is caused to determine the cause of the abnormality being detected, and the display device 30 has an abnormality with the cause. Display the occurrence and alert the administrator.

  Here, the processing content of the abnormality detection part 21 of the monitoring camera apparatus 1 in embodiment of this invention is demonstrated in detail. FIG. 4 is a flowchart showing processing steps of the abnormality detection unit 21 of the monitoring camera device 1 according to the embodiment of the present invention.

  The abnormality detection unit 21 of the monitoring camera device 1 according to the embodiment of the present invention performs the following processing every time focus adjustment is completed or periodically (every predetermined time). First, the abnormality detection unit 21 calculates the corresponding time zone (the infrared light cut filter 62 of the filter unit 4 from the 20 pieces of data of the focus degree value D from the history information stored in the history information storage unit 22. Data (10 times) of “daytime” if it is on the optical path and “night” if the infrared light cut filter 62 is retracted from the optical path) is extracted (S1). The abnormality detection unit 21 compares the latest focus degree value D with the extracted 10 focus degree values D, and the latest focus degree value D is extracted 10 times. If it is within the variation range of the value D, the process proceeds to the next step, and if it is outside the variation range, it is determined as abnormal (S2). The process in step S2 will be described in detail. To simplify the explanation, all past focus adjustments are performed in the “auto adjustment” mode, and the latest focus adjustment is also performed in accordance with the “night to daytime” time zone switching in the “auto adjustment” mode. Suppose that it was done.

  FIG. 5 is a conceptual diagram for explaining processing of the abnormality detection unit 21 of the monitoring camera device 1 according to the embodiment of the present invention. In FIG. 5, the horizontal axis represents the number of times focus adjustment has been performed, and the vertical axis represents the focus degree value D. In the example shown in FIG. 5, the region P indicates the value at the time of switching “nighttime → daytime” (that is, the value of the time zone is “daytime”), and the region Q is at the time of switching “daytime → nighttime”. The value (that is, the value when the time zone is “night”) is shown. Under such a premise, since the latest focus degree value R shown in FIG. 5 is a value at the time of switching from “nighttime to daytime”, the abnormality detection unit 21 determines that the latest focus degree value R is in the region P. In the example of FIG. 5, the latest focus degree value R is within the range of the focus degree value variation ΔT in the region P. It is determined that there is no abnormality. On the other hand, when the latest focus degree value is the focus degree value S in FIG. 5, the abnormality detection unit 21 determines that the latest focus degree value R is within a range of the focus degree value variation ΔT in the region P. It is determined as “abnormal” as being outside. By making such a determination, it is presumed that some abnormality has occurred because the focus value has changed greatly during the latest AF processing. In this example, all past focus adjustments have been performed by “automatic adjustment”. However, when other focus adjustments such as “one-push adjustment” have also been performed in the past. Refers to the drive type G out of 10 data of the focus degree value D, and compares only the “automatic adjustment” data with the latest focus degree value to detect an abnormality with higher accuracy. can do. In the above-described example, the latest focus degree value is compared with 10 pieces of data of the focus degree value D to determine whether or not it is within the range of the variation ΔT. Practically, the latest focus degree value is compared with the average focus degree value (latest) K. If the difference is within a predetermined range, it is determined that there is no abnormality, A configuration may be adopted in which it is determined that “abnormality exists” when the difference exceeds a predetermined range. With such a configuration, the number of calculation steps can be reduced, so that a configuration suitable for downsizing of the apparatus can be realized.

  Returning to FIG. 4, the abnormality detection unit 21 of the monitoring camera device 1 according to the embodiment of the present invention, after step S <b> 2, the time zone corresponding to the 20 pieces of data of the AF position coordinates C from the history information storage unit 22. 10 are extracted (S3), and it is determined whether or not the latest value is within the range of variation of the previously acquired value. If it is within the range of variation, the process proceeds to the next step. If it is out of the range, it is determined that “abnormality exists” (S4). The determination method is the same as the determination method in the focus degree value shown in FIG. By making such a determination, it is presumed that some abnormality has occurred because the AF position coordinates have changed greatly during the latest AF processing. In this example, all past focus adjustments have been performed by “automatic adjustment”. However, when other focus adjustments such as “one-push adjustment” have also been performed in the past. Refers to the drive type G out of 10 pieces of data of the AF position coordinates C and compares only the “auto adjustment” with the latest AF position coordinate values, thereby detecting an abnormality with higher accuracy. can do. In the above-described example, the latest AF position coordinate value is compared with 10 pieces of data of the AF position coordinate C to determine whether or not it is within the range of the variation ΔT. Practically, the latest AF position coordinate value is compared with the AF position coordinate average value (latest) J, and if the difference is within a predetermined range, it is determined that there is no abnormality, A configuration may be adopted in which it is determined that “abnormality exists” when the difference exceeds a predetermined range. With such a configuration, the number of calculation steps can be reduced, so that a configuration suitable for downsizing of the apparatus can be realized.

  Next, the abnormality detection unit 21 extracts the focus degree average value (latest) K and the focus degree average value (initial) I from the history information storage unit 22 (S5), and whether or not the difference is within a predetermined range. Is determined (S6). By making such a determination, it is presumed that some abnormality has occurred because the degree of focus has changed greatly with time.

  Next, the abnormality detection unit 21 extracts the AF position coordinate average value (latest) J and the AF position coordinate average value (initial) H from the history information storage unit 22 (S7), and whether or not the difference is within a predetermined range. Is determined (S8). By making such a determination, it is presumed that some abnormality has occurred because the AF position coordinates have changed greatly with time.

  In the above example, as shown in FIG. 4, whether the focus degree value D, the AF position coordinates C, the focus degree average values I and K, and the AF position coordinate average values H and J are normal or abnormal in this order. However, the present invention is not limited to this order. The order of abnormality determination based on the four history information can be arbitrarily determined.

  Further, in the monitoring camera device 1 according to the embodiment of the present invention, the abnormality detection unit 21 to the abnormality cause determination unit 23 determine whether “abnormal” is present along with any information indicating “abnormal”. It is assumed that what has been done is output.

  Next, the abnormality cause determination unit 23 of the surveillance camera device 1 according to the embodiment of the present invention extracts the history information from the history information storage unit 22 when the abnormality detection unit 21 detects an abnormality, and the cause Determine. Further, this cause can be displayed on the display device 30. This determination method will be described in detail.

  FIG. 6 is a diagram illustrating an example of the content of the abnormality cause determination process performed by the abnormality cause determination unit 23 of the monitoring camera device 1 according to the embodiment of the present invention. In FIG. 6, the focus degree value D, the AF position coordinates C, the focus degree average values I and K, the AF position coordinate average values H and J, the number of AF adjustment redoes F, the number of movement steps E or the number of origin search movement steps. B, the number of AF adjustments (cumulative) L or the number of times of power ON A, and the corresponding error No. E1 to E6 and their contents are shown. The abnormality cause determination unit 23 determines whether there is an abnormality in the abnormality detection unit 21 based on the history information of the focus degree value D, the AF position coordinates C, the focus degree average values I and K, and the AF position coordinate average values H and J. NG) ”, and the change tendency of the number of AF adjustment redoes F and the number of movement steps E or the number of origin search movement steps B in the same time zone as the latest focus adjustment, and further the number of AF adjustments (cumulative) ) The cause of the abnormality is determined from the value of L or the power ON count A.

  For example, in the top row (error No. E1), the history information determined as “abnormal (NG)” by the abnormality detection unit 21 is the focus degree value D, and the number of AF adjustment redoes F is normal. In this case, the number of movement steps E or the number of movements of the origin search movement step B is the same as that of the normal value and large (for example, three times or more). In such a case, it usually takes time to adjust the focus, and the focus degree value D has changed greatly this time. As the cause, for example, the surveillance camera device 1 is located in a downtown area. It is conceivable that a rapid focus adjustment cannot be performed due to the influence of the luminance change because a place where the luminance change is relatively large such as a neon light or a place where there is a lot of traffic or traffic. In such a case, the abnormality cause determination unit 23 displays a message indicating that an abnormality has occurred on the display device 30 and “There is a possibility that it is provided in a place where the luminance change is large. By displaying such as “Please switch focus adjustment to“ preset adjustment ””, the cause of the abnormality can be understood, so that a monitoring camera system that is convenient for the administrator can be configured.

  Next, error no. E2 indicates a case where the history information determined as “abnormal (NG)” by the abnormality detection unit 21 is the focus degree value D and the number of AF adjustment redoes F is small (for example, less than 3). . In such a case, time is not required for focus adjustment, and the focus degree value D has changed greatly this time. As a cause thereof, for example, within the angle of view of the monitoring camera device 1, Since a subject having highlights such as a headlight of an automobile suddenly entered during the focus adjustment this time, it is conceivable that the highlighted portion is in focus. In such a case, the abnormality cause determination unit 23 displays that the abnormality has occurred on the display device 30 and displays a message such as “Please switch to“ preset adjustment ”mode”, thereby There is a high possibility that an image in focus on the entire screen can be obtained without being affected by highlights such as headlights, and a surveillance camera system that is convenient for the administrator can be configured. In such a case, the abnormality cause determination unit 23 can cause the AF process determination unit 15 to perform focus adjustment again.

  Next, error no. E3 is a case where the history information determined to be “abnormal (NG)” by the abnormality detection unit 21 is the focus degree value D, and the number of AF adjustment redoes F is suddenly larger than usual, and This shows a case where the number E of movement steps or the number B of origin search movement steps is suddenly larger than usual. In such a case, the focus adjustment takes a suddenly longer time than usual, and the focus degree value D has changed greatly this time. However, an action of removing the lens part 2 or spraying the lens surface (so-called tampering action), a failure of the lens part 2 or the like can be considered. In such a case, the abnormality cause determination unit 23 displays that the abnormality has occurred on the display device 30 and displays a message such as “There is a possibility of tampering being performed”. A fraudulent act can be quickly known, and a monitoring camera system that is convenient for the administrator can be configured.

  Next, error no. E4 shows the case where the history information determined as “abnormal (NG)” by the abnormality detection unit 21 is the AF position coordinate C. In such a case, although it does not take time for the focus adjustment, the AF position coordinate C has changed greatly. As a cause thereof, for example, a position closer to (or farther from) a subject that is normally photographed, There may be a case where another subject suddenly appears during focus adjustment. In such a case, the abnormality cause determination unit 23 displays the fact that an abnormality has occurred on the display device 30 and displays a message such as “Please switch to the“ preset adjustment ”mode”. The possibility that an image in focus on the entire screen other than the subject appearing on the screen can be obtained is increased, and a monitoring camera system that is highly convenient for the administrator can be configured.

  Next, error no. In E5, the history information determined as “abnormal (NG)” by the abnormality detection unit 21 is the average value of the degree of focus, and the AF adjustment number (cumulative) L or the power ON number A is large (for example, 10,000 times). The above shows the case. In such a case, it is considered that the degree of focus has changed over time, and the cause is that the degree of focus has changed due to, for example, deformation of the lens due to heat or direct sunlight, cloudiness, dirt, etc. Can be considered. In such a case, the abnormality cause determination unit 23 displays on the display device 30 that an abnormality has occurred and displays a message such as “Please check the lens” to determine the cause of the abnormality. As can be seen, it is possible to configure a surveillance camera system that is convenient for the administrator.

  In addition, error no. In E6, the history information determined as “abnormal (NG)” by the abnormality detection unit 21 is the AF position coordinate average value, and the AF adjustment number (cumulative) L or the power ON number A is large (for example, 10,000 times). The above shows the case. In such a case, it is conceivable that the AF position coordinates change with time, and the cause is that the AF position coordinates are caused by, for example, mechanical shaking of the image sensor moving unit 6 or the image sensor driving unit 13. It may be changing. In such a case, the abnormality cause determination unit 23 displays on the display device 30 that an abnormality has occurred and displays a message such as “Please check the device” to determine the cause of the abnormality. As can be seen, it is possible to configure a surveillance camera system that is convenient for the administrator.

  As described above, when the monitoring camera system 50 according to the embodiment of the present invention is used, even when the focus adjustment is not successful in the monitoring camera device 1, the cause is estimated and the action to be taken is displayed on the display device 30. Therefore, a system with excellent convenience can be provided.

  In the embodiment of the present invention, the monitoring camera apparatus 1 has been described as the imaging apparatus. However, the imaging apparatus of the present invention is not limited to the monitoring camera apparatus. For example, it is needless to say that the present invention can be applied to any imaging device such as a video camera as long as the imaging device 5 can be moved in the optical axis direction to perform focus adjustment.

  As described above, if the photographing apparatus and the photographing system according to the present invention are used, even when an abnormality such as a mischief or a malfunction of the lens by an unauthorized person occurs, the abnormality can be detected. This has the effect of providing a high photographing device and photographing system, and is useful as a photographing device such as a monitoring camera device and a photographing system using the photographing device.

The block diagram which shows the structure of the surveillance camera system in embodiment of this invention The block diagram which shows the structure of the surveillance camera apparatus in embodiment of this invention The figure which shows an example of the historical information memorize | stored in the historical information storage part of the surveillance camera apparatus in embodiment of this invention The flowchart which shows the process step of the abnormality detection part of the surveillance camera apparatus in embodiment of this invention. The conceptual diagram for demonstrating the process of the abnormality detection part of the surveillance camera apparatus in embodiment of this invention The figure which shows an example of the content of the abnormality cause determination process which the abnormality cause determination part of the surveillance camera apparatus in embodiment of this invention performs

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surveillance camera apparatus 2 Lens part 3 Diaphragm part 4 Filter part 5 Image pick-up element 6 Image pick-up element moving part 7 Video signal processing part 8 Communication control part 9 Focus value calculation part 10 Drive control part 12 Filter drive part 13 Image pick-up element drive part 14 Shutter drive unit 15 AF processing determination unit 16 Brightness change determination unit 17 Motion detection unit 18 Illuminance change detection unit 19 Temperature change detection unit 20 Input switch unit 21 Abnormality detection unit 22 History information storage unit 23 Abnormality cause determination unit 30 Display device 31 32 Connector 33 Guide display 35 Display unit 40 Input device 41 Keyboard 42 Focus adjustment instruction unit 43, 44 Manual adjustment button 45, 46 AF adjustment button 50 Surveillance camera system 51 Aperture drive unit 52 Origin detection unit 61 Frame body unit 62 Infrared light Cut filter

Claims (16)

A shooting unit for shooting;
A focus adjustment unit for adjusting the focus of the photographing unit;
A history information storage unit that stores focus adjustment history information of the focus adjustment unit;
An imaging apparatus comprising: an abnormality detection unit configured to detect an abnormality based on focus adjustment history information stored in the history information storage unit. The abnormality detection unit compares the past history information stored in the history information storage unit with the latest history information at the time of focus adjustment by the focus adjustment unit, and detects an abnormality based on the difference. The imaging device according to claim 1. When an abnormality is detected by the abnormality detection unit, an abnormality cause determination unit is provided that determines a cause of the detection of the abnormality based on history information stored in the history information storage unit. The imaging device according to claim 1 or 2. The photographing unit has an image sensor,
The focus adjustment unit
An image sensor driving section for moving the image sensor in the optical axis direction;
An in-focus degree calculating unit for calculating an in-focus degree from an image photographed by the photographing unit;
The imaging apparatus according to claim 1, further comprising: a drive control unit that controls the image sensor driving unit so that the focus degree is the highest. 5. The history information includes AF position information indicating a value of the degree of focus when the focus adjustment is completed, and an AF position information indicating the position of the image sensor when the focus adjustment is completed. Shooting device. 6. The photographing according to claim 5, wherein the history information includes an initial average value and a latest average value of the focus degree, and an initial average value and a latest average value of the AF position information. apparatus. The imaging unit includes a filter unit including an infrared light cut filter unit movable in a direction perpendicular to the optical axis, and the focus adjustment unit performs focus adjustment when the filter unit is moved. The imaging device according to any one of claims 1 to 6, wherein: An AF start instruction unit for starting focus adjustment with respect to the focus adjustment unit;
The photographing apparatus according to claim 1, wherein the focus adjustment unit starts focus adjustment based on an instruction from the AF start instruction unit. The AF start instruction unit includes an illuminance change detection unit that detects a predetermined illuminance change, and causes the focus adjustment unit to start focus adjustment when the illuminance change detection unit detects the illuminance change. The imaging device according to claim 8. The AF start instruction unit includes a temperature change detection unit that detects a predetermined temperature change, and causes the focus adjustment unit to start focus adjustment when the temperature change detection unit detects the temperature change. The imaging device according to claim 8. 9. The photographing apparatus according to claim 8, wherein the AF start instruction unit includes an input switch unit, and causes the focus adjustment unit to start focus adjustment when there is an input from the input switch unit. . The AF start instruction unit includes a luminance change detection unit that detects a predetermined luminance change of an image captured by the imaging unit, and when the predetermined luminance change is detected by the luminance change detection unit, The photographing apparatus according to claim 8, wherein the focus adjustment unit is instructed to delay the start of focus adjustment for a predetermined time. The AF start instruction unit includes a motion detection unit that detects the movement of the subject in the image captured by the imaging unit. When the motion detection unit detects the movement of the subject, the AF start instruction unit focuses for a predetermined time. The photographing apparatus according to claim 8, wherein the focus adjustment unit is instructed to delay the start of adjustment. The photographing unit has a diaphragm unit and a diaphragm driving unit that opens and closes the diaphragm unit,
The photographing apparatus according to claim 1, wherein the focus adjustment unit performs focus adjustment by opening the aperture unit with respect to the aperture drive unit. The imaging device according to any one of claims 1 to 14,
An input device having a focus adjustment instruction unit that instructs the focus adjustment unit of the photographing apparatus to start focus adjustment;
An imaging system, comprising: an image captured by the imaging device; and a display unit that displays when an abnormality is detected by the abnormality detection unit. The imaging device according to any one of claims 3 to 14,
An input device having a focus adjustment instruction unit that instructs the focus adjustment unit of the photographing apparatus to start focus adjustment;
An image captured by the photographing device, a display unit for displaying the cause when an abnormality is detected by the abnormality detection unit, and a cause when the cause of the abnormality is determined by the abnormality cause determination unit A photographing system characterized by comprising:

Images