JP2007318673A - Sensor camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sensor camera in which sensing using an image sensor can be stably performed even when ambient lightness including an area to be imaged is reduced, and no halation occurs in an image obtained by imaging. <P>SOLUTION: In the sensor camera, a lightness judging section 9 judges whether an illumination is required or not when a lightness level detected by a lightness sensor 5 detecting lightness around an apparatus becomes lower than or equal with a fixed level, and outputs its judgement signal to a lightness control section 10. When the judgement signal is inputted, the lightness control section 10 turns on a light source of an illuminator 8 and controls the quantity of light of the light source so that the lightness becomes a predetermined level. When it becomes a period of time during which an image sensor 4 detects a moving object and an image of the moving object picked up by an imaging camera 1 is transmitted to an interphone master unit 101, the lightness control section 10 controls the quantity of light of the light source of the illuminator 8 and reduces lightness of the illumination. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sensor camera with a sensor added to an intercom device or the like.

  Due to recent improvements in crime prevention awareness, convenience such as being able to confirm the face of a visitor or recording the face of a visitor when absent is evaluated, and a door phone camera system for residential use has become widespread. In addition, with the widespread use, door phone camera systems have been provided in which surveillance cameras are added as terminals for the purpose of preventing intrusion into houses, and the system is improved so that the surrounding area can be warned.

  FIG. 8 shows a schematic diagram of an example. In this illustrated example, an interphone between a door phone with a camera 100 installed at a gate G of a house H and a door phone parent 101 installed in the house H is used as an interphone. In a doorphone system in which a visitor captured by a camera of the doorphone slave unit 100 along with a call can be confirmed by an image displayed on the monitor device M of the doorphone parent unit 101 and can be recorded, for example, on the outer wall of a house H When a sensor camera 102 with a human detection sensor is attached and the human detection sensor detects an intruder in the site 103, the detection information and an image captured by the imaging means of the sensor camera 102 are sent to the door phone parent unit 101, While displaying the image on the monitor device M, the alarm device provided in the door phone parent device 101 performs the notification, while the sensor camera 1 The illumination device 104 is provided in two by lighting adapted to provide a threat to the intruder.

This type of sensor camera 102 employs a heat ray sensor that detects a person by detecting a heat ray (infrared ray) emitted from a human body as a human detection sensor due to cost and design convenience ( For example, Patent Document 1).
JP 2004-88380 A (paragraphs 0015 to 0018)

  By the way, the above-mentioned heat ray sensor is hard to catch the heat change with the background for the movement of the moving object (m) to be detected shown in FIG. As shown in b), since the polarities of the elements of the pyroelectric element S used are reversed, the generated signal tends to be canceled in the case of approaching, and the sensitivity tends to decrease.

  The sensor camera disclosed in Patent Document 1 crosses when a person enters the detection area and reliably detects and notifies the intruder regardless of approach, and transmits an image to the intercom master unit 101. However, as described above, in the heat ray sensor X, the detection sensitivity of a person approaching the heat ray sensor is low, and the sensor camera is a heat ray sensor as shown in FIG. 10 detects a person and then employs a method of supplying power from the doorphone master unit 100 as shown in FIG. 10B, so that the rise of the sensor camera is slow as shown in FIG. As shown in FIG. 10D, there is a delay in the time from human detection until the captured image of the sensor camera is output. Therefore, the start of recording in the doorphone master unit 100 is also time T as shown in FIG. As a result, the recorded image has a problem that the figure of the intruder from the intrusion of the detection area of the heat ray sensor X to the passage is not reflected. Therefore, in the configuration disclosed in Patent Document 1, the moving image A method of recording when an object (person) is stopped in the detection area is employed.

  In order to solve such a problem of the heat ray sensor X, there is also provided one that employs an image sensor that detects a person from a captured image. However, if the ambient brightness including the imaging region decreases, There is a problem that the overall contrast is reduced and the sensitivity as an image sensor is lowered. In order to prevent such a decrease in sensitivity, normally, lighting is used to ensure a predetermined brightness at night when the surroundings are dark so that stable sensing can be performed. Since the brightness of the moving object changes according to the distance to the moving object (person), for example, if illumination is performed to ensure sufficient brightness at a distance, the moving object is captured in the vicinity of the imaging camera. There was a problem that the image to be obtained was a whiteout image.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to stably perform sensing by an image sensor even when the surrounding brightness including the area to be imaged becomes dark and to be obtained by imaging. An object of the present invention is to provide a sensor camera in which whiteout does not occur in an image.

  In order to achieve the above object, in the first aspect of the present invention, in the first aspect of the present invention, an image pickup means for picking up a predetermined area, an image processing means for detecting a moving object from the picked-up image of the pick-up means, and a picked-up image In a sensor camera provided with a means for outputting a signal, brightness determination means for determining the brightness of the surroundings, and when the brightness determined by the brightness determination means is below a certain level, the illumination means is turned on and the illumination Brightness control means for controlling the light quantity of the means.

  According to the first aspect of the present invention, the illumination means is turned on even if the surroundings are dark, so that an image having a contrast that does not decrease the sensitivity of the sensing can be obtained and sensing can be performed reliably, and the light quantity of the illumination means can be controlled. Thus, it is possible to obtain an image that does not cause whiteout, and as a result, even when the image is monitored by a monitor device, the displayed image can be confirmed satisfactorily.

  According to a second aspect of the present invention, in the first aspect of the invention, the brightness control means is a brightness of illumination when the image pickup means picks up a monitor image for projecting an image obtained by the image pickup means on the monitor device. However, the light quantity of the illumination means is controlled so as to be darker than the brightness of the illumination when the image processing means captures a sensing image for detecting a moving object.

  According to the second aspect of the present invention, when it is not necessary to perform sensing only by monitoring the image with the monitor device, the light amount of the illumination means is controlled so that the brightness is such that a person can judge from the projected image. Thus, the power consumption can be reduced and the life of the illumination means can be extended, and the necessary brightness can be ensured when sensing the image sensor.

  According to a third aspect of the present invention, in the first aspect of the invention, the brightness control unit controls the amount of light of the illumination unit based on the size of a moving object on an image detected from a captured image of the imaging unit. It is characterized by that.

  According to the invention of claim 3, when the moving object moves in the vicinity direction of the image pickup means, the size of the moving object on the image is gradually increased, so that the distance between the image pickup means and the moving object is increased. Can create an optimal lighting environment.

  According to a fourth aspect of the present invention, in the first aspect of the invention, the brightness control unit controls the light amount of the illumination unit based on a position on the image of the moving object detected from the captured image of the imaging unit. It is characterized by.

  According to the fourth aspect of the present invention, when the moving object moves in the vicinity direction of the imaging means, the position of the moving object moves in the lower end direction of the image, and the distance between the imaging means and the moving object is determined. Can create an optimal lighting environment.

  According to a fifth aspect of the present invention, in the first aspect of the invention, the brightness control unit controls the amount of light of the illumination unit based on the brightness of a moving object detected from an image captured by the imaging unit. And

According to the invention of claim 5, an optimal illumination environment can be created for the moving object by controlling the light quantity of the illumination means by the brightness of the moving object itself. In a sensor camera provided with an image pickup means for picking up images and an image processing means for detecting a moving object from an image taken by the image pickup means, the brightness determination means for determining the brightness of the surroundings, and the brightness determination means A brightness control unit that turns on the illumination unit when the brightness is below a certain level and changes the gain of the imaging unit based on the brightness of the moving object detected from the captured image of the imaging unit; Features.

  According to the invention of claim 6, by turning on the illuminating means even when the surrounding is dark, an image with a contrast that does not decrease the sensitivity of sensing of the image sensor can be obtained, and sensing by the image sensor can be performed reliably. By controlling the gain, it is possible to obtain an image that does not cause overexposure and reliably confirm a person from the image displayed on the monitor device.

  According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the brightness determination unit includes various types of imaging units related to brightness including a luminance level of a captured image of the imaging unit. It is characterized in that the brightness is determined based on the original value.

  According to the seventh aspect of the present invention, since the brightness is determined from the image of the image pickup means, the optimum brightness can be determined, and an illumination environment necessary for sensing can be surely created and an image without whiteout can be obtained. become.

  In the present invention, by turning on the illumination even when the surroundings are dark, it is possible to obtain an image with a contrast that does not decrease the sensing sensitivity of the image sensor, so that the image sensor can reliably perform sensing, and an image without whiteout is obtained. Even when the result image is monitored by the monitor device, there is an effect that the displayed image can be confirmed satisfactorily.

Embodiments of the present invention will be described below.
(Embodiment 1)
FIG. 1 shows a configuration of a sensor camera according to the present embodiment. The sensor camera according to the present embodiment is attached to an outer wall of a house, for example, and is an image pickup unit for picking up an image of a predetermined area (for example, a site of the house). The camera 1, the YUV / NTSC converter 2 that converts the captured image data of the YUV format output from the imaging camera 1 into an NTSC image signal, and the NTSC image signal output from the YUV / NTSC converter 2 An image output from the imaging camera 1 and a monitor system circuit composed of a transmission unit 3 that modulates with a predetermined modulation method and transmits the signal to the monitor device M of the doorphone parent device 101 provided in the house via the signal line L, for example. The image sensor 4 detects a moving object (intruder) from the data, and makes a human detection determination from the detection information of the image sensor 4, and reports to the notification / alarm unit 6 based on this determination. A signal processing unit 7 that outputs a signal for generating sound or lighting a threatening illuminating lamp (not shown) that irradiates the site, and detects ambient brightness including a photographing region A brightness sensor 5, an illuminating device 8 that illuminates the imaging region, a brightness determination unit (brightness determination means) 9 that determines the brightness detected by the brightness sensor 5, and the brightness sensor 5 detect The illumination device 8 is turned on when the brightness (illuminance) to be performed is below a certain level, and the illumination device is configured so that the image obtained by the imaging camera 1 is not blown out based on the brightness obtained through the brightness determination unit 9. 8, that is, a brightness control unit (brightness control means) 10 for controlling illumination.

  The imaging camera 1 used in this embodiment has sensitivity in the infrared region and the visible region, and uses a fixed imaging element such as a CCD or a CMOS image sensor that images the monitoring area in time series. An A / D converter for A / D converting the YUV signal output from the element into YUV data is provided. If the device itself has a digital output like a general CMOS camera, it is not necessary to provide an A / D converter in the subsequent stage.

  Moreover, the illuminating device 8 uses infrared LED which emits infrared light as a light source, and irradiates at least the monitoring area which the imaging camera 1 images. An LED that emits visible light or a normal lamp may be used.

  The brightness sensor 5 detects the brightness (illuminance) around the apparatus using an element such as CdS or a photodiode, and outputs a detection signal indicating the brightness level to the brightness determination unit 9. Yes. The brightness sensor 5 is provided so as not to be affected by the illumination light, for example, when the lighting device 8 is turned on, or corresponds by adjustment in control.

  When the brightness level detected by the brightness sensor 5 is equal to or lower than a predetermined value, the brightness determination unit 9 outputs a determination signal for causing the brightness control unit 10 to turn on the lighting device 8.

  The brightness control unit 10 turns on the lighting device 8 during the period when the determination signal is input, and the signal indicating that the image processing is in progress is not input from the signal processing unit 7 to be described later with respect to the light amount of the lighting device 8. Then, the image sensor 4 is lit with a light amount of a predetermined level that can secure a brightness capable of sensing operation with a sensitivity of a predetermined level or more, and during a period in which a signal during image transmission is being input from the signal processing unit 7, It has a function of controlling the current or applied voltage that flows through the light source of the illumination device 8 so as to reduce the amount of light.

  The brightness determination unit 9, the brightness control unit 10, and the signal processing unit 7 are actually composed of a microcomputer.

  On the other hand, the image sensor 4 includes an image processing unit (image processing unit) 40 and a storage unit 41. The image processing unit 40 includes a contour extracting unit 40a, a moving contour extracting unit 40b, a moving region detecting unit 40c, and a region feature amount detecting unit. 40d and the like.

  Here, the contour extracting means 40a performs a differentiation process on the time-series grayscale image data output from the imaging camera 1 using a general SOBEL filter or the like to extract a contour image, and this extracted contour A process of storing the image data in the storage unit 41 for a certain period is performed.

  The moving contour extraction unit 40b performs logical synthesis using time-series contour image data, and performs a process of creating and extracting a composite image from only the contour in the moving state.

  The moving region extracting unit 40c extracts the region of the moving object (person) by labeling the composite image obtained by the moving contour extracting unit 40. If the extracted area is represented by a circumscribed square area, the amount of data is reduced and the calculation process is facilitated. Further, according to this method, there is no afterimage as in the case of obtaining the frame difference, and only the moved region can be extracted.

  The area feature quantity detection means 40d uses the contour image data stored in the storage unit 41 to extract the direction value of the moving contour portion to create a moving direction frequency distribution, and the created moving direction frequency distribution is characterized. As a quantity, it has a function of determining whether the area movement of the moving object is due to a disturbance or a person.

  By the way, the contour of a person has more curved parts than the linear component and has a complicated shape, so the edge direction is distributed in all directions, and the contours of structures such as shadows have many linear components, and the movement direction frequency distribution is It tends to be a biased distribution.

  Therefore, a moving direction frequency distribution table for comparing and determining whether the moving area represents a person for the moving area is stored in the storage unit 41, for example, and the moving direction frequency distribution indicated by the table and the generated moving direction frequency are stored. By comparing the distribution, it is determined whether the region movement is caused by a person.

  The signal processing unit 7 supervises control and signal processing of the entire apparatus. When the detection information of the image sensor 4 is output, it is determined that there is an intruder in the site (monitoring area), and a notification / alarm unit 6 outputs a control signal for notifying the alarm sound and a control signal for turning on the illumination lamp that illuminates the site, and the alarm / alarm unit 6 informs the inhabitant that there is an intruder with the alarm sound and also the illumination light. A function for intimidating the intruder and a function for transferring size information on the moving object image from the image sensor 4 to the brightness control unit 10 as information for controlling the brightness of the illumination. I have.

  Next, the operation in the case where the present embodiment is used in an intercom system that does not have a recording function will be described.

  First, when the brightness around the apparatus detected by the brightness sensor 5 at night or the like becomes below a certain level, the brightness determination unit 9 outputs a determination signal to the brightness control unit 10. In response to this determination signal, the brightness control unit 10 turns on the light source of the illumination device 8 with a constant light amount to ensure a predetermined level of brightness that does not reduce the sensitivity of the sensing operation of the image sensor 4 (FIG. 2C). ).

  When the detection information is output from the image sensor 4 as shown in FIG. 2A in a state where the brightness of the monitoring area is secured by illumination, the signal processing unit 7 operates the notification / alarm unit 6. On the other hand, the sensing operation of the image sensor 4 is stopped and the image captured by the imaging camera 1 is controlled to be transmitted to the monitor device M of the door phone parent unit 101 via the YUV / NTCS conversion unit 2 and the transmission unit 3. (FIG. 2 (b), displayed on the monitor device of the door phone master unit. Also, since sensing by the image sensor 4 is not performed during this image transmission period Tx, a moving object (person) can be confirmed on the screen of the monitor device M. The signal processing unit 7 outputs an instruction signal for reducing the light amount of the light source of the lighting device 10 to the brightness control unit 10 so as to reduce the brightness of the illumination to a certain extent. To dim the brightness of the illumination performs control to decrease the quantity of light of the light source of the lighting device 8 as shown in FIG. 2 (c).

  In this way, in the present embodiment, when the brightness level around the device is below a certain level, the illumination device 8 is turned on to ensure the sensitivity for the sensing operation of the image sensor 4, and the image sensor 4 detects the moving object. During the period in which the image of the moving object detected and captured by the imaging camera 1 is transmitted to the monitor device M, the illumination is dimmed to reduce the power consumption during the image transmission, and thereby the long life of the light source of the illumination device 8 In addition, the moving object (person) can be surely confirmed by avoiding overexposure in the image projected on the monitor device M.

By the way, when there is a recording function, as shown in FIG. 3 (c), when the recording function is operating, the signal processing unit 7 so as to darken the illumination by the illumination device 8 as shown in FIG. 3 (d). Outputs an instruction signal to the brightness control unit 10. In other words, whiteout does not occur in the recorded image. Further, the signal processing unit 7 inputs the detection information of the image sensor 4 shown in FIG. 3A as in the case without the recording function of FIG. 4 so that the image of the imaging camera 1 is shown in FIG. In addition, an instruction signal is output to the brightness control unit 10 so that the illumination by the illumination device 8 is dimmed during the image transmission period Tx to be transmitted to the monitor device M of the doorphone master unit 101.
(Embodiment 2)
In the first embodiment described above, the signal processing unit sets the brightness of the illumination by the illumination device 8 to a predetermined level during the sensing operation by the image sensor 4 and darkens the illumination by the illumination device 8 during the image transmission period or during recording. In this embodiment, when the moving object is close to the imaging camera 1, the light amount of the illumination device 8 is reduced. The control is characterized in that an optimum illumination environment is created so that whiteout does not occur in an image to be monitored while ensuring the sensitivity of sensing by the image sensor 4. Since the configuration is the same as that of the first embodiment, a specific example of this embodiment will be described with reference to the configuration of FIG.

(Example 1)
This example shows the size of the moving object captured by the image sensor 4, that is, the area or height dimension of the circumscribed rectangle α corresponding to the moving object m as shown in (a) to (c) of FIG. Size information on the image whose width changes depending on the distance between the imaging camera 1 and the moving object is sent to the signal processing unit 7, and the signal processing unit 7 determines the size of the moving object on the image from this size information. Is detected to be equal to or larger than a certain size a (see FIG. 4B), that is, when the moving object m moves in the vicinity of the imaging camera 1, the light amount of the light source of the illumination device 8 is reduced. Is output to the brightness control unit 10. As a result, the brightness control unit 10 illuminates the light amount of the light source of the illuminating device 8 so that the light amount is reduced from the light amount at which a predetermined level of brightness is obtained as indicated by (I) in FIG. The apparatus 8 is controlled.

  Thus, in this example, whiteout can be prevented when the moving object m approaches the imaging camera 1 while ensuring the sensitivity of the sensing operation of the image sensor 4.

  The signal processing unit 7 outputs an instruction signal for instructing a control amount for controlling the light amount of the light source of the illumination device 8 to the brightness control unit 10 according to a change in the size of the moving object on the image, and responds to this. Then, the brightness control unit 10 controls the light quantity of the light source of the illumination device 8 so as to correspond to the change in the size of the moving object m as shown by (II) in FIG. Also good.

(Example 2)
In Example 1, the distance between the moving object m and the imaging camera 1 is determined from the size of the moving object m on the image, and the light amount of the light source of the illumination device 8 is controlled according to the distance. The distance between the moving object m and the imaging camera 1 is the height of the lower end of the moving object m, that is, the base β of the circumscribed rectangle α, as shown in (a) to (c) of FIG. This is different from Example 1 in that the position information is output from the image sensor 4 to the signal processing unit 7. That is, it is used that the height position of the base β of the circumscribed rectangle α becomes lower as the moving object m approaches the imaging camera 1.

  Thus, the signal processing unit 7 moves the moving object m in the vicinity of the imaging camera 1 from the position information, and the height position of the base β of the circumscribed rectangle α on the image becomes equal to or less than the constant b shown in FIG. When this is detected, an instruction signal instructing to reduce the light amount of the light source of the illumination device 8 is output to the brightness control unit 10. As a result, the brightness control unit 10 illuminates the light amount of the light source of the illuminating device 8 so that the light amount is reduced from the light amount at which a predetermined level of brightness is obtained, as indicated by (I) in FIG. 5B. The apparatus 8 is controlled.

  Thus, in this example, whiteout can be prevented when the moving object m approaches the imaging camera 1 while ensuring the sensitivity of the sensing operation of the image sensor 4.

The signal processing unit 7 outputs an instruction signal for instructing a control amount for controlling the light amount of the light source of the illumination device 8 to the brightness control unit 10 according to a change in the height position of the moving object on the image, Accordingly, the brightness control unit 10 may control the light amount of the light source of the illumination device 8 to correspond to the change in the height position of the moving object m as shown in FIG. 5 (II) according to the control amount. .
(Embodiment 3)
In Embodiment 2 described above, the brightness of the illumination is controlled according to the distance between the moving object and the imaging camera 1, but in this embodiment, the signal processing unit 7 outputs an image signal output from the imaging camera 1. (Video signal) is captured, and as shown in FIGS. 6A and 6B, a circumscribed rectangle corresponding to the moving object m detected by the image sensor 4 is set as the photometric area α ′ on the image, and the photometric measurement is performed. A feature is that a control amount of the light amount of the light source of the illumination device 8 is obtained based on the luminance level of the area α ′, and the control amount is given to the brightness control unit 10 as an instruction signal.

  Since other configurations and operations are the same as those of the first embodiment, description and illustration are omitted.

  Thus, in this embodiment, the signal processing unit 7 detects the brightness of itself from the image of the moving object m and outputs an instruction signal corresponding to the control amount corresponding to the brightness to the brightness control unit 10. Then, the brightness control unit 10 controls the light amount of the light source of the illumination device 8 according to the control amount indicated by the instruction signal, and creates an optimal illumination environment for the moving object m.

In place of controlling the brightness of the illumination, the same effect as when controlling the brightness of the illumination may be obtained by controlling the gain of the imaging camera 1.
(Embodiment 4)
In any of the first to third embodiments described above, the brightness level around the apparatus is detected by the brightness sensor 5, but in this embodiment, the brightness level is not used as shown in FIG. The feature is that the level is detected. That is, the signal processing unit 7 according to the present embodiment takes in the image signal output from the imaging camera 1, calculates an average value of the luminance level of the image, outputs the average value to the brightness determination unit 9, and brightness from the imaging camera 1. The brightness determination unit 9 performs processing for transferring the gain and shutter speed of the imaging camera 1 related to the brightness determination unit 9, and the brightness determination unit 9 determines the average value of the luminance level sent from the signal processing unit 7 and the gain value. Then, it is determined whether or not the brightness level around the apparatus has become below a certain level based on the shutter speed, and when it is judged that the brightness level is below a certain level, the judgment signal is sent to the brightness control unit 10 to turn on the lighting device 8. It is.

  In addition, since any method of Embodiment 1-5 may be employ | adopted about the light quantity control of the light source of the illuminating device 8 which lighted, description is abbreviate | omitted here. Further, since the operation of the image sensor 4 and other operations based on the detection information are the same as those in the first embodiment, the same components as those in FIG. 1 are denoted by the same reference numerals in FIG. Description is omitted.

1 is a block diagram of Embodiment 1. FIG. 3 is a time chart for explaining operations of the first embodiment. 6 is another operation explanation time chart of the first embodiment. (A) is a principle explanatory diagram of Example 1 of the second embodiment, and (b) is an explanatory diagram of brightness control of the first example of the second embodiment. (A) is explanatory drawing of the principle of Example 2 of Embodiment 2, (b) is explanatory drawing of the brightness control of Example 2 of Embodiment 2. It is explanatory drawing of the photometry area used for Embodiment 3. FIG. It is a block diagram of Embodiment 4. It is explanatory drawing of the intercom system provided with the sensor camera. It is a subject explanatory drawing of a heat ray sensor. It is a timing chart for the subject explanation of a sensor camera at the time of using a heat ray sensor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Imaging camera 2 YUV / NTSC conversion part 3 Transmission part 4 Image sensor 40 Image processing part 40a Contour extraction means 40b Moving outline extraction means 40c Moving area extraction means 40d Area feature-value detection means 41 Storage part 5 Brightness sensor 6 Notification / alarm Unit 7 Signal processing unit 8 Illumination device 9 Brightness determination unit 10 Brightness control unit 101 Interphone parent device M Monitor device L Signal line

Claims (7)

Brightness for determining the brightness of the surroundings in a sensor camera comprising an imaging means for imaging a predetermined area, an image processing means for detecting a moving object from an image captured by the imaging means, and a means for outputting a captured image signal A sensor camera comprising: determination means; and brightness control means for turning on the illumination means and controlling the amount of light of the illumination means when the brightness determined by the brightness determination means is below a certain level . The brightness control means detects the moving object with the image processing means when the brightness of the illumination when the image pickup means picks up the monitor image for projecting the image obtained by the image pickup means with the monitor device. The sensor camera according to claim 1, wherein the light quantity of the illuminating unit is controlled so as to be darker than the brightness of the illumination when the image for sensing is taken. 2. The sensor camera according to claim 1, wherein the brightness control unit controls a light amount of the illumination unit based on a size of a moving object on an image detected from a captured image of the imaging unit. The sensor camera according to claim 1, wherein the brightness control unit controls a light amount of the illumination unit based on a position on an image of a moving object detected from a captured image of the imaging unit. 2. The sensor camera according to claim 1, wherein the brightness control unit controls a light amount of the illumination unit based on a brightness of a moving object detected from a captured image of the imaging unit. In a sensor camera comprising an imaging means for imaging a predetermined area and an image processing means for detecting a moving object from an image captured by the imaging means, brightness determination means for determining the brightness of the surroundings, and the brightness determination means A brightness control unit that turns on the illumination unit when the brightness determined by the camera is equal to or less than a certain level and changes the gain of the imaging unit based on the brightness of the moving object detected from the captured image of the imaging unit. A sensor camera characterized by 7. The brightness determination unit according to claim 1, wherein the brightness determination unit performs brightness determination based on a specification value of the imaging unit related to brightness including a luminance level of a captured image of the imaging unit. The sensor camera described in 1.

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