JP2009111656A - Imaging system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging system capable of acquiring an image with a clear imaging range, without being affected by the installation environment, even under various installation environments. <P>SOLUTION: A lens 61 is arranged at the center of the front of a camera main body 51 of a surveillance camera 5. An illumination device 62 is arranged around the lens 61. The illumination device 62 is composed of a plurality of LEDs 63, 63..., and the LEDs 63, 63..., are divided into three areas A1, A2 and A3. When an object, such as, a wall is close to the right side of the imaging range of the surveillance camera 5, LEDs 63, 63..., of the right area A2 are turned off, and LEDs 63, 63..., of the left area A1 and the front side area A3 are turned on. Thus, a white spot phenomenon in an image can be avoided in the right area of the imaging range, and the image can be prevented from becoming a black spot in the left and the front side area of the imaging range. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an imaging system capable of imaging a subject even at night.

  Due to heightened security awareness, surveillance cameras have also been installed in ordinary houses and condominiums. For example, theft of a car can be prevented by installing a surveillance camera having an imaging range of a garage and a parking lot. In addition, surveillance cameras are installed near the back door of houses, staircases in apartments, and lobbies to help prevent suspicious people from entering.

  Some surveillance cameras include a lighting device. By illuminating the imaging range with the illumination device, the surveillance area can be imaged even at night. In many cases, when a moving object is detected by a sensor, the illumination device is automatically turned on. Thereby, the intrusion prevention of the suspicious person at night is also possible.

  Patent Document 1 discloses a technique related to a monitoring camera provided with an illumination unit. In the surveillance camera of this document, the imaging range and focus of the camera are linked with the illumination range in the illumination unit. In this way, it is considered that a sufficient amount of light can be supplied to the imaging range.

JP 2005-94080 A

  For example, a surveillance camera that uses a garage as an imaging range is often attached to a wall of a house. At this time, either the left or right imaging range of the imaging range of the surveillance camera may be close to the wall. In such an installation environment, when a night image is captured, the illumination by the illumination device is reflected by the wall, and the captured image is strongly influenced by the reflected light. That is, in the imaging range, the region closer to the wall is very bright due to the reflected light from the wall. When white balance processing is performed on such an image, the luminance of an area not affected by the reflected light from the wall is reduced, and the video is blackened. In other words, the area affected by the reflected light from the wall has a very high brightness, and the image looks like a whiteout, and the other areas are blacked out, so there is a problem that the subject cannot be observed sufficiently. .

  In order to avoid the influence of the reflected light, a method of adjusting the angle of the monitoring camera so that the wall is removed from the imaging range is also conceivable, but the vicinity of the wall is out of the monitoring area. For example, when a door or window is being monitored, the door or window that is the monitoring area cannot be removed from the imaging range, and therefore the method of adjusting the angle of the monitoring camera cannot be taken.

  In view of the above problems, an object of the present invention is to provide an imaging system capable of acquiring a clear image in an imaging range without being affected by the installation environment even in various installation environments.

  In order to solve the above problem, an imaging system according to claim 1 includes an imaging device that forms an image of subject light incident through a lens, and an illumination device that is disposed around the subject light incident region, The illumination device is arranged in a second direction opposite to the first direction around the subject light incident area, and a first illumination element arranged in a first direction around the subject light incident area. The first and second lighting elements can be individually turned on and off.

  The invention according to claim 2 is the imaging system according to claim 1, further comprising a third illumination element disposed between the first illumination element and the second illumination element, The first, second and third illumination elements can be individually turned on and off.

  The invention according to claim 3 is the imaging system according to claim 1 or 2, wherein the first illumination element includes a plurality of first partial illumination elements, and each first partial illumination element is It can be turned on and off individually.

  According to a fourth aspect of the present invention, in the imaging system according to any one of the first to third aspects, the second illumination element includes a plurality of second partial illumination elements, and each second portion. The lighting elements can be individually turned on and off.

  According to a fifth aspect of the present invention, in the imaging system according to any one of the first to fourth aspects, the third illumination element includes a plurality of third partial illumination elements, and each third portion. The lighting elements can be individually turned on and off.

  According to a sixth aspect of the present invention, in the imaging system according to the first aspect, the first and second illumination elements have directivity.

  According to a seventh aspect of the present invention, in the imaging system according to the second aspect, the first, second and third illumination elements have directivity.

  The invention according to claim 8 is the imaging system according to any one of claims 1 to 7, further comprising a control device for analyzing the image data output by the imaging device, wherein the control device is an image. The lighting element to be lit is determined based on the analysis result of the data.

  The imaging system of the present invention is arranged in a second direction opposite to the first illumination element arranged in the first direction around the subject light incident area and the first direction around the subject light incident area. The first and second lighting elements can be individually turned on and off.

  Thereby, it is possible to adjust the irradiation amount of the illumination light with respect to the imaging range according to the area. For example, when an object such as a wall is close to the right side of the imaging camera, the illumination element arranged on the right side is turned off and the illumination element arranged on the left side is turned on. Accordingly, it is possible to avoid the phenomenon that the image in the right region in the imaging range is over-exposed, and the phenomenon that the image in the left region in the imaging range is blackened.

  In the imaging system of the present invention, a third lighting element that can be individually turned on and off is disposed between the first lighting element and the second lighting element. Thereby, the irradiation amount of the illumination light in the imaging range can be adjusted according to the region.

  Each of the first, second, and third lighting elements includes a plurality of first partial lighting elements, a plurality of second partial lighting elements, and a plurality of third partial lighting elements. Elements can be turned on and off individually. Thereby, the illumination light irradiation amount in the imaging range can be further finely adjusted according to the region.

  Moreover, since the 1st, 2nd and 3rd illumination element has directivity, the irradiation amount of the illumination light in an imaging range can be adjusted further appropriately according to a region.

  Moreover, the imaging system of this invention determines the lighting element to light based on the analysis result of image data. As a result, the captured image obtained by the imaging system becomes clear by automatic control without being affected by the installation environment. In addition, a clear captured image can be obtained even when the lighting element setting by manual setting is incorrect.

{First embodiment}
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a house 1 in which a monitoring system according to this embodiment is installed and the surroundings. Next to the house 1, a garage 2 is provided and a car 3 is parked. A surveillance camera 5 is installed on the wall of the house 1 on the back side of the garage 2.

  The surveillance camera 5 is installed so that the imaging range of the surveillance camera 5 extends from the back side of the garage 2 toward the entrance side (road side). Thereby, it is possible to image a person who has entered the garage 2 or a person who has approached the house 1, and prevents a suspicious person from entering the garage 2 or a suspicious person from approaching the house 1. be able to. In the present embodiment, the case where the monitoring camera 5 monitors the vicinity of the garage 2 will be described as an example. However, in addition to this, the area around the door and the window is installed so as to be imaged, and those areas are arranged. Used for monitoring.

  FIG. 2 is a front view of the monitoring camera 5. The surveillance camera 5 includes a substantially cylindrical camera body 51. An upper part and left and right side parts of the camera body 51 are covered with a body cover 52.

  A lens 61 is disposed in the center of the front of the camera body 51. And the illuminating device 62 is provided so that the circumference | surroundings of the lens 61 may be enclosed 360 degrees. The illumination device 62 includes a plurality of LEDs 63, 63. In the present embodiment, a white LED is used as the LED 63. By turning on the plurality of LEDs 63, 63,..., The imaging range of the surveillance camera 5 is irradiated, and images can be taken even at night.

  FIG. 3 is a block diagram of the monitoring system. This monitoring system includes the monitoring camera 5 shown in FIGS. 1 and 2 and a controller 7 connected to the monitoring camera 5. The surveillance camera 5 is attached to the outer wall of the house 1 as shown in FIG. The monitoring camera 5 is connected to the controller 7 via the cable 6. The controller 7 is installed in the house 1.

  As shown in FIG. 2, the monitoring camera 5 includes a lens 61 and a lighting device 62. The monitoring camera 5 includes a CCD 65 that forms an image of subject light incident through the lens 61 and converts the subject light into an electrical signal. As the image sensor, a CMOS may be used in addition to the CCD. The monitoring camera 5 also includes an image processing unit 66 that performs image processing on the image data output from the CCD 65 and a control unit 67 that performs overall control of the monitoring camera 5.

  In addition, the monitoring camera 5 includes a sensor (not shown), and at night, the illumination device 32 is controlled to be turned on when the sensor detects a moving object. As will be described in detail later, in the present embodiment, when the sensor detects a moving object, the LEDs 63, 63 included in the set region among the plurality of LEDs 63, 63,... ... lights up.

  The controller 7 includes a control unit 71 that performs overall control of the controller 7. The controller 7 includes a recording unit 72, an operation unit 73, and a display unit 74. The recording unit 72 records the captured image transferred from the monitoring camera 5. The recording unit 72 includes a hard disk that records captured images. The operation unit 73 includes operation buttons, a cursor, and the like for performing various setting operations on the monitoring system and a recorded image reproduction operation. The display unit 74 displays a recorded image, various settings of the monitoring system, and the like.

  Next, the configuration and control method of the illumination device 62 will be described in detail. The illumination device 62 according to the present embodiment includes a plurality of LEDs 63, 63... As described above. And the illuminating device 62 can light and extinguish several LED63,63 ... separately for every area | region.

  Specifically, as shown in FIG. 4, the illumination device 62 is divided into three regions A1, A2, and A3. In the area A1, LEDs 63, 63,... For irradiating illumination light mainly on the left imaging range as viewed from the monitoring camera 5 are arranged. In the area A1, as shown in the figure, six LEDs 63, 63... Are arranged. In the area A2, LEDs 63, 63,... For irradiating illumination light mainly on the right imaging range as viewed from the monitoring camera 5 are arranged. In the area A2, as shown in the drawing, six LEDs 63, 63... Are arranged. In the area A3, LEDs 63, 63,... For irradiating illumination light mainly on the imaging range on the front side when viewed from the monitoring camera 5 are arranged. In the area A3, as shown in the drawing, a total of 12 LEDs 63, 63... Are arranged, 6 on the upper side and 6 on the lower side.

  And the illuminating device 62 can turn on and off LED63 for every area | region about three area | region A1, A2, A3. For example, the LEDs 63, 63... In the area A1 are turned off and the LEDs 63, 63... In the areas A2, A3 are turned on, so that the illumination light is mainly directed to the right and front imaging ranges as viewed from the monitoring camera 5. Can be irradiated. Conversely, the LEDs 63, 63... In the area A2 are turned off and the LEDs 63, 63... In the areas A1, A3 are turned on, so that the imaging ranges mainly on the left side and the front side as viewed from the monitoring camera 5 are illuminated. It is possible to irradiate light.

  For example, consider the case where the surveillance camera 5 is attached to the outer wall of the house 1 as shown in FIG. In the installation state shown in FIG. 1, the right side of the imaging range of the monitoring camera 5 is close to the wall of the house 1. In such an installation situation, the user sets the LEDs 63, 63... In the area A2 of the lighting device 62 to be extinguished and the LEDs 63, 63.

  Thereby, the irradiation amount of the illumination light by the illuminating device 62 with respect to the imaging range on the right side when viewed from the monitoring camera 5 is reduced, and the influence of the reflection of the irradiation light by the wall can be reduced. Therefore, it is possible to avoid a phenomenon in which the luminance of the right region in the imaging range becomes very high and the image is overexposed. On the other hand, in the left side and the front side of the imaging range, the irradiation amount of the illumination light to the subject is ensured by the LEDs 63, 63... In the area A1 and the area A3. In addition, the luminance on the front side can be maintained at a required level or higher. As a result, even when white balance adjustment is performed, it is possible to avoid the phenomenon that the luminance of the left side area and the front side area decreases and the captured image is blacked out, and the subject can be clearly confirmed.

  Also, with the monitoring system of the present embodiment, a useful captured image can be obtained without adjusting the angle of the monitoring camera 5, that is, without changing the imaging range. Therefore, it is also effective when an area close to the wall such as a window or a door is to be used as a monitoring area.

  Conversely, if an object such as a wall is close to the left side of the surveillance camera 5, the LEDs 63, 63... In the area A1 are turned off, and the LEDs 63, 63,. Good. Thereby, it is possible to maintain the brightness of the captured image at a required level or more while reducing the influence of the reflected light from the wall.

  When objects such as walls are close to the left and right sides of the surveillance camera 5, the LEDs 63, 63... In the area A1 and the area A2 are turned off, and only the LEDs 63, 63. You may make it make it.

  The user can set the lighting / extinguishing setting of the LED for each area with respect to the monitoring camera 5 by operating the operation unit 73 of the controller 7. Alternatively, the camera body 51 of the monitoring camera 5 may be provided with an operation unit that can be turned on / off for each region. For example, at the time of introduction of the monitoring system, the installation worker may perform setting of turning on / off the LED for each area according to the installation state of the monitoring camera 5. In addition, the user can confirm the status of the recorded image, and can appropriately change the lighting / extinguishing setting of the LED.

{Second Embodiment}
Next, a second embodiment of the present invention will be described. The configuration of the surveillance camera 5 according to the second embodiment is the same as that shown in FIG. The configuration of the monitoring system is the same as that shown in FIG. In the monitoring camera 5 of the second embodiment, the area of the illumination device 32 is further subdivided.

  FIG. 5 is a diagram illustrating a divided region of the illumination device 32 in the monitoring camera 5 according to the second embodiment. As shown in the figure, the illumination device 32 is divided into six regions. Specifically, the area A1 according to the first embodiment shown in FIG. 4 is further divided into two upper and lower areas A11 and A12. Further, the area A2 shown in FIG. 4 is further divided into two upper and lower areas A21 and A22. Further, the area A3 shown in FIG. 4 is further divided into two upper and lower areas A31 and A32.

  And the illuminating device 32 is comprised so that the area | regions A11, A12, A21, A22, A31, and A32 can be individually turned on / off. With such a configuration, the monitoring camera 5 can further appropriately adjust the illumination light irradiation amount with respect to the imaging range.

  As in the case described in the first embodiment, for example, in the installation situation shown in FIG. 1, the right side of the imaging range of the monitoring camera 5 is close to the wall of the house 1. In such an installation situation, the user turns off the LEDs 63, 63... In the area A 21 and the area A 22 of the lighting device 62 and turns on the LEDs 63, 63 ... in the areas A 11, A 12, A 31, A 32. Set it.

  Thereby, the irradiation amount of the illumination light by the illumination device 62 with respect to the imaging range on the right side when viewed from the monitoring camera 5 is reduced, and the influence of the reflection of the irradiation light by the wall can be reduced. Further, as a result of confirming the captured image recorded in the recording unit 72, when it is felt that the luminance on the right side of the imaging range is slightly low, one of the LEDs 63, 63. is there. This makes it possible to make fine adjustments to maintain the brightness of the captured image at a required level or more while reducing the influence of reflected light. Alternatively, when the distance from an object such as a wall existing on the right side of the imaging range is relatively long, only one of the LEDs 63, 63... In the area A21 or the area A22 may be turned off as an initial setting. Good.

  On the other hand, when an object such as a wall is close to the left side of the monitoring camera 5, the user turns off the LEDs 63, 63,... Of the illumination device 62 and the regions A21, A22, It is set to turn on the LEDs 63, 63... Of A31, A32. Then, as a result of confirming the captured image, if it is felt that the luminance on the left side of the imaging range is slightly low, one of the LEDs 63, 63... In the area A11 or the area A12 is turned on. This makes it possible to make fine adjustments to maintain the brightness of the captured image at a required level or more while reducing the influence of reflected light.

  Further, when objects such as walls are close to the left and right sides of the surveillance camera 5, one or both of the LEDs 63, 63... 22, one or both of the LEDs 63, 63... May be turned off to adjust the illumination light irradiation amount for each region.

  Furthermore, the monitoring camera 5 of the present embodiment can adjust the illumination light irradiation amount in the vertical direction. For example, it is assumed that there is an object such as the roof of the house 1 immediately above the monitoring camera 5 and the influence of reflected light is strong on the upper side of the imaging range. In such an installation environment, the LEDs 63, 63,... In the upper areas A11, A21, A31 are turned off, and the LEDs 63, 63, etc. in the lower areas A12, A22, A32 are turned on. Alternatively, the amount of light can be adjusted by turning on the LEDs 63, 63,... For any one of the areas A11, A21, A31 according to the brightness state of the captured image.

  In addition, the monitoring camera 5 of the present embodiment can adjust the amount of illumination light in a balanced manner regardless of the influence of reflected light. For example, by turning on the LEDs 63, 63 ... in the three areas A11, A21, A32 of the lighting device 32 and turning off the LEDs 63, 63 ... in the three areas A31, A12, A22, It is possible to reduce the overall light amount in a balanced manner.

{Third embodiment}
Next, a third embodiment of the present invention will be described. In this embodiment, each LED 63, 63,... Provided in the illumination device 32 has directivity. That is, each LED63, 63 ... irradiates illumination light to the imaging range of a specific direction, respectively.

  First, the case where each LED63, 63 ... of the illuminating device 32 which concerns on 1st Embodiment shown in FIG. 4 has directivity is demonstrated. In this case, as the six LEDs 63, 63,... Arranged in the area A1, LEDs having directivity for irradiating illumination light to the left area as viewed from the monitoring camera 5 are used. Illumination light is applied to the region R1 shown in FIG. Moreover, LED with the directivity which irradiates illumination light to the area | region on the right side seeing from the surveillance camera 5 is used for six LED63,63 ... arrange | positioned in area | region A2. Illumination light is applied to the region R2 shown in FIG. Further, as the twelve LEDs 63, 63,... Arranged in the area A3, LEDs having directivity for irradiating illumination light to the area on the front side when viewed from the monitoring camera 5 are used. Illumination light is applied to the region R3 shown in FIG.

  In such a configuration, as in the case described in the first embodiment, the LEDs 63, 63,... For example, in the installation situation shown in FIG. 1, the LEDs 63, 63... In the area A2 are turned off. At this time, the LEDs 63, 63... In the areas A1, A3 are turned on, but have directivity and irradiate the illumination light intensively to the areas R1, R3 as shown in FIG. It is possible to further reduce the influence of light. In addition, on the front side and the left side of the imaging range, it is possible to maintain the brightness of the captured image at a required level or more without reducing the amount of light.

  Next, the case where each LED63, 63 ... of the illuminating device 32 which concerns on 2nd Embodiment shown in FIG. 5 has directivity is demonstrated. In this case, as the six LEDs 63, 63,... Arranged in the areas A11, A12, LEDs having directivity for irradiating illumination light to the left area when viewed from the monitoring camera 5 are used. Illumination light is applied to the region R1 shown in FIG. Moreover, LED with the directivity which irradiates illumination light to the area | region of the right side seeing from the surveillance camera 5 is used for six LED63,63 ... arrange | positioned in area | region A21, A22. Illumination light is applied to the region R2 shown in FIG. In addition, as the 12 LEDs 63, 63,... Arranged in the areas A31, A32, LEDs having directivity for irradiating illumination light to the area on the front side when viewed from the monitoring camera 5 are used. Illumination light is applied to the region R3 shown in FIG.

  In such a configuration, as in the case described in the second embodiment, the LEDs 63, 63,... For example, in the installation situation shown in FIG. 1, the LEDs 63, 63... In the area A21 or the area A22 are turned off. At this time, the LEDs 63, 63... In the areas A11, A12, A31, A32 are lit, but have directivity, and as shown in FIG. 6, the illumination light is concentrated on the areas R1, R3. It is possible to further reduce the influence of reflected light from the wall. Further, on the front side and the left side of the imaging range, it is possible to maintain the brightness of the captured image at a required level or higher without reducing the amount of light.

{Fourth embodiment}
Next, a fourth embodiment of the present invention will be described. The configuration of the surveillance camera 5 according to the fourth embodiment is the same as that shown in FIG. The configuration of the monitoring system is the same as that shown in FIG. The surveillance camera 5 of the fourth embodiment controls the lighting and extinguishing of the LEDs 63, 63... By image analysis.

  FIG. 7 is a flowchart regarding LED lighting control. First, the control unit 71 of the controller 7 acquires a captured image from the recording unit 72 (step S1). When the control unit 71 analyzes the captured image and determines that the luminance on the left and right sides of the imaging range is uniformly high and the central luminance is low (YES in step S2), the control unit 71 proceeds to step S4, and the LED Performs lighting area change control.

  In order to determine the condition of step S2, the control unit 71 is set with first and second threshold values relating to luminance. Then, in a region on the left and right sides of the imaging range, if the region whose luminance is higher than the first threshold occupies a predetermined ratio or more (for example, 50% or more), the luminance on the left and right sides is uniformly high. judge. In addition, regarding the central region of the imaging range, when the region whose luminance is lower than the second threshold occupies a predetermined ratio or more (for example, 50% or more), the luminance of the central region is low (the center is dark). Judgment is made.

  If the above condition is not satisfied in step S2, the process proceeds to step S3. When the control unit 71 analyzes the captured image and determines that the luminance on the left and right sides of the imaging range is uniformly high and the edge cannot be detected (YES in step S3), the control unit 71 proceeds to step S4 and turns on the LED. Perform area change control.

  In order to determine the condition of step S3, the control unit 71 is set with a third threshold value for edge determination in addition to the first threshold value related to the luminance. Then, in a region on the left and right sides of the imaging range, if the region whose luminance is higher than the first threshold occupies a predetermined ratio or more (for example, 50% or more), the luminance on the left and right sides is uniformly high. judge. Further, when the ratio of pixels determined to be edge pixels is lower than the third threshold value in the entire imaging range, it is determined that an edge cannot be detected.

  These first, second, and third threshold values can be freely set by the user. The user can select an optimal setting from the setting value of the threshold and the state of the captured image.

  If the above condition is not satisfied in step S3, the process returns to step S1 and is repeated. That is, since it can be determined that a captured image of a quality that can confirm the subject is obtained, the process is repeated without changing the lighting region of the LED.

  In step S4, the lighting area of the LED is changed. For example, when the luminance in the right area of the imaging range is uniformly high and the center is dark, control is performed to turn off the LED in the right area. For example, the LEDs 63, 63... In the area A2 shown in FIG. Alternatively, the LEDs 63, 63,... In the area A21 shown in FIG. 5 may be turned off, and the LEDs 63, 63,. Then, the control is further repeated, and when the condition of step S2 is satisfied again, the LEDs 63, 63,...

  Further, when the luminance of the left region of the imaging range is uniformly high and an edge cannot be detected, control is performed to turn off the LED in the left region. For example, the LEDs 63, 63... In the area A1 shown in FIG. Alternatively, the LEDs 63, 63,... In the area A11 shown in FIG. 5 may be turned off, and the LEDs 63, 63,. Further, when the control is repeated and the condition of step S3 is again satisfied, the LEDs 63, 63... May be turned off also for the area A12.

  In the LED lighting control process using FIG. 7, the determination criteria as shown in step S2 or step S3 are provided, but this is an example. For example, when the edge detection amount of the entire captured image is smaller than a predetermined threshold, it may be determined that there is a reflecting object such as a wall on the left and right sides. In this case, what is necessary is just to control so that LED of the area | region with a high brightness | luminance is turned off among the right-and-left one side.

  Further, in the LED lighting control process using FIG. 7, the case where the luminance on the left and right sides is high is determined, but the case where the luminance on the upper and lower sides is high may be determined.

  Such LED lighting area changing processing by image analysis may be performed constantly or periodically such as once a day.

  Further, the LED lighting control may be used independently by the image analysis described above, or may be used in combination with manual setting by the user. When LED lighting control is used alone, manual setting by the user is unnecessary. Based on the image analysis, an LED to be turned on and off is determined.

  On the other hand, when using together with the manual setting by the user, first, the area of the LED to be turned on and off is manually set by the user. Then, by performing the control described with reference to FIG. 7, when it is determined that the manual setting by the user is not suitable, the control is switched to automatic control, and the lighting control of the LED by image analysis is performed.

It is a figure which shows the installation state of the monitoring system which concerns on embodiment. It is a front view of the surveillance camera which concerns on embodiment. 1 is a block diagram of a monitoring system according to an embodiment. It is a figure which shows the division area of the illuminating device of the surveillance camera which concerns on 1st Embodiment. It is a figure which shows the division area of the illuminating device of the surveillance camera which concerns on 2nd Embodiment. It is a figure which shows the irradiation area | region by the illuminating device of the surveillance camera which concerns on 3rd Embodiment. It is a flowchart which shows the LED lighting control processing of the monitoring system which concerns on 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 House 2 Garage 3 Car 5 Surveillance camera 61 Lens 62 Illumination device 63 LED

Claims (8)

An image sensor that forms an image of subject light incident through the lens;
An illumination device arranged around the subject light incident area;
With
The lighting device includes:
A first lighting element arranged in a first direction around the subject light incident area;
A second illumination element disposed in a second direction opposite to the first direction around the subject light incident area;
Including
The imaging system, wherein the first and second illumination elements can be individually turned on and off. The imaging system according to claim 1, further comprising:
A third lighting element disposed between the first lighting element and the second lighting element;
With
The imaging system, wherein the first, second and third illumination elements can be individually turned on and off. The imaging system according to claim 1 or 2,
The first lighting element comprises:
A plurality of first partial lighting elements;
Including
An imaging system, wherein each first partial illumination element can be individually turned on and off. The imaging system according to any one of claims 1 to 3,
The second lighting element comprises:
A plurality of second partial lighting elements,
Including
An imaging system, wherein each second partial illumination element can be individually turned on and off. The imaging system according to any one of claims 1 to 4,
The third lighting element comprises:
A plurality of third partial lighting elements,
Including
An imaging system, wherein each third partial illumination element can be individually turned on and off. The imaging system according to claim 1,
The imaging system according to claim 1, wherein the first and second illumination elements have directivity. The imaging system according to claim 2,
The imaging system, wherein the first, second, and third illumination elements have directivity. The imaging system according to any one of claims 1 to 7, further comprising:
A control device for analyzing the image data output by the image sensor;
With
The control apparatus determines an illumination element to be turned on based on an analysis result of image data.

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