JP6489796B2 - Imaging device, control method thereof, and control program - Google Patents

Description

  The present invention relates to an imaging apparatus including an infrared light reduction unit that can be inserted into and removed from an optical path of a photographing optical system, a control method thereof, and a control program, and in particular, an imaging apparatus that inserts and removes an infrared light reduction unit according to illuminance of a subject. About.

  Conventionally, in an imaging apparatus such as a digital camera, a method of selectively inserting and removing an infrared cut filter, which is an infrared light reduction unit, from an optical path of a photographing optical system according to the illuminance of a subject and switching a photographing mode (hereinafter referred to as auto day / night) ) Is used.

  In the auto day / night mode, when the illuminance of the subject is higher than a predetermined illuminance, a color photographing mode for cutting near infrared light (wavelength = about 700 nm or more) in which an infrared cut filter is inserted in the optical path is set. On the other hand, when the illuminance of the subject is equal to or lower than the predetermined illuminance, the monochrome photographing mode is selected in which the infrared cut filter is removed from the optical path.

  When detecting the illuminance of the subject, for example, the illuminance (that is, luminance) of the subject is detected by an image signal that is an output of an image sensor such as a CMOS image sensor, or provided separately from the photographing optical system. The illuminance of the subject is detected using an illuminance sensor. When detecting the illuminance of a subject using an illuminance sensor, the illuminance of the subject is not accurately detected and the photographic mode is switched appropriately if the illuminance detection range of the photographic sensor is different from the illuminance detection range of the illuminance sensor Will not be able to.

  In order to deal with such a problem, for example, the illuminance detection range is corrected in accordance with the change in the angle of view of the zoom lens provided in the photographing optical system, and the illuminance of the subject is accurately detected and the switching of the photographing mode is stabilized. There is a method (see Patent Document 1 or 2).

JP 2010-279061 A JP 2007-49442 A

  However, in the methods described in Patent Documents 1 and 2 described above, if the infrared light reflectance is not uniform in the photographing range by the photographing optical system, an error occurs in the correction of the illuminance detection range. For this reason, for example, in a shooting environment in which a subject is illuminated by infrared illumination, the infrared light reflectivity differs in the shooting range by the shooting optical system due to the influence of the subject distance, etc. It becomes impossible to carry out stably.

  Accordingly, an object of the present invention is to provide an imaging apparatus capable of accurately inserting and removing an infrared light reduction unit, a control method thereof, and a control program.

In order to achieve the above object, an imaging apparatus according to the present invention is an imaging apparatus having an imaging element that forms an optical image through a photographic optical system and outputs an image signal corresponding to the optical image. Infrared light reducing means for reducing the amount of infrared light contained in the optical image that is inserted between the imaging optical system and the image sensor and reaches the image sensor, and brightness of the subject according to the image signal The first detection means for detecting the first illuminance detection result and the second detection means arranged at a position different from the image sensor and detecting the luminance of the subject to obtain the second illuminance detection result And the first illuminance detection result and the second illuminance detection result, and the illuminance detection result of the first detection means and the illuminance detection result of the second detection means according to the comparison result Select either as the selected illuminance detection result And-option means, and having a control means for controlling to be inserted into the optical path between the selected illuminance detection result the photographing optical system the infrared light reducing means in response to said image pickup device.

According to the control method of the present invention, an optical image is formed through a photographic optical system, and an image sensor that outputs an image signal corresponding to the optical image is inserted between the photographic optical system and the image sensor. An image pickup apparatus control method comprising: an infrared light reduction unit that reduces an amount of infrared light included in the optical image reaching the image sensor, wherein the brightness of a subject is detected according to the image signal. A first detection step for obtaining a first illuminance detection result; and a second detection step for obtaining a second illuminance detection result by detecting the luminance of the subject by an illuminance sensor disposed at a position different from the image sensor. The first illuminance detection result and the second illuminance detection result are compared, and either the illuminance detection result according to the image signal or the illuminance detection result by the illuminance sensor is determined according to the comparison result. With the selected illuminance detection result Wherein a selection step of selecting, that and a control step of performing control to be inserted into the optical path between the selected illuminance detection result the photographing optical system the infrared light reducing means in response to said imaging element Te And

A control program according to the present invention is inserted between an imaging device that forms an optical image through a photographing optical system and outputs an image signal corresponding to the optical image, and between the photographing optical system and the imaging device. A control program used in an imaging apparatus having infrared light reducing means for reducing the amount of infrared light included in the optical image reaching the imaging element, wherein the image signal is stored in a computer provided in the imaging apparatus A first detection step of detecting the luminance of the subject in accordance with the first luminance detection result to obtain a first illuminance detection result, and detecting the luminance of the subject by an illuminance sensor disposed at a position different from the imaging element, a second detecting step of obtaining a detection result, the first illuminance detection result and the second by comparing the illuminance detected result, illuminance detection result and the illumination corresponding to the image signal according to the comparison result A selection step of selecting either the illuminance detection result as a selection illuminance detection result by the capacitors, the infrared light reducing means in response to the selection illuminance detection result in the light path between the imaging optical system and the imaging device And a control step for performing insertion control .

  According to the present invention, it is possible to insert and remove the infrared light reduction unit with high accuracy and stability.

It is a figure which shows the structure about an example of the imaging device by the 1st Embodiment of this invention. FIG. 2 is a block diagram illustrating an example of a configuration of a control circuit illustrated in FIG. 1. It is a figure which shows the example about the relationship between the imaging | photography range in the camera shown in FIG. 1, and the illumination intensity detection range of an illumination intensity sensor. It is a figure which shows another example about the relationship between the imaging | photography range in the camera shown in FIG. 1, and the illumination intensity detection range of an illumination intensity sensor. It is a flowchart for demonstrating the mode determination process for the mode switching operation performed in the camera shown in FIG. It is a flowchart for demonstrating the mode determination process for the mode switching operation performed in the camera by the 2nd Embodiment of this invention.

  Hereinafter, an example of an imaging apparatus according to an embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a diagram showing the configuration of an example of an imaging apparatus according to the first embodiment of the present invention.

  The illustrated imaging apparatus is, for example, a digital camera (hereinafter simply referred to as a camera), and includes a plurality of imaging lenses 1 that are imaging optical systems. A filter switching mechanism 3 is disposed at the subsequent stage of the photographic optical system. The filter switching mechanism 3 includes an infrared cut filter 4 (infrared light reducing means) and a filter unit having a transparent substrate 5. As long as the infrared cut filter 4 can reduce the amount of infrared light that reaches the image sensor 7, the infrared cut filter 4 may completely block the infrared light, or may not block the infrared light completely. A sufficient reduction effect may be obtained when the rate is not less than a predetermined value (for example, not less than 90%).

  The filter unit can be moved in a direction orthogonal (crossing) to the optical axis (that is, the optical path) 2 of the photographing optical system, and the infrared cut filter 4 or the transparent substrate 5 is selectively selected according to the movement of the filter unit. Positioned on the optical axis 2. That is, the infrared cut filter 4 or the transparent substrate 5 can be selectively inserted into or removed from the optical axis 2 by driving the infrared cut filter insertion / extraction motor 6 under the control of the control circuit 10 (in other words, The infrared cut filter 4 can be inserted into and removed from the optical path).

  An image pickup device 7 such as a CMOS image sensor is disposed at the subsequent stage of the filter switching mechanism 3, and an optical image (subject image) is formed on the image pickup device 7 through a photographing optical system. The image sensor 7 outputs an image signal corresponding to the optical image to the control circuit 10.

  An illuminance sensor 8 and an infrared illumination unit 11 are connected to the control circuit 10. The infrared illumination unit 11 uses an LED or the like as a light source to illuminate the subject with infrared light under the control of the control circuit 10. Do. The illuminance sensor 8 receives light from the direction of the optical axis 9 and detects the illuminance in the imaging range by the imaging optical system. The spectral sensitivity characteristics of the illuminance sensor 8 are substantially the same as the spectral sensitivity characteristics of the image sensor 7 and the infrared (IR) cut filter 4 when the infrared cut filter 4 is positioned on the optical axis 2.

  The control circuit 10 controls the entire camera, and the control circuit 10 controls input of power and outputs a video signal corresponding to the image signal.

  At least one of the imaging lenses 1 is a zoom lens, and the control circuit 10 drives and controls the zoom motor 12 to move the imaging lens 1 along the optical axis 2 to change the focal length of the imaging lens 1 from the wide angle to the telephoto. Change.

  FIG. 2 is a block diagram showing an example of the configuration of the control circuit 10 shown in FIG. In FIG. 2, the filter switching mechanism 3 shown in FIG. 1 is omitted, and only one imaging lens 1 is shown.

  The control circuit 10 includes a camera control circuit 21, an image sensor control circuit 22, an illuminance sensor control circuit 23, a video signal processing circuit 24, an IR cut filter control circuit 25, a photometry circuit 26, a video signal output circuit 27, and an infrared illumination control circuit. 28, and a zoom motor control circuit 29.

  At the time of shooting, the optical image incident from the imaging lens 1 passes through the IR cut filter 4 or the transparent substrate 5 and forms an image on the imaging element 7. The image sensor control circuit 22 controls the reading of the image sensor 7 and outputs an image signal corresponding to the optical image from the image sensor 7. Then, the image sensor control circuit 22 sends the image signal to the photometry circuit 26 and the video signal processing circuit 24.

  The video signal processing circuit 24 performs predetermined signal processing on the image signal to generate a color or monochrome video signal. This video signal is output to the outside by the video signal output circuit 27.

  The photometry circuit 26 measures the illuminance (that is, luminance) of the subject according to the image signal, and sends the first illuminance detection result to the camera control circuit 21. The illuminance sensor 8 is controlled by the illuminance sensor control circuit 23, and the illuminance sensor control circuit 23 sends the illuminance detection result obtained by the illuminance sensor 8 to the camera control circuit 21 as a second illuminance detection result.

  The camera control circuit 21 controls the IR cut filter control circuit 25 and the infrared illumination control circuit 28 according to the first and second illuminance detection results. Accordingly, the IR cut filter control circuit 25 and the infrared illumination control circuit 28 drive and control the infrared cut filter insertion / extraction motor 6 and the infrared illumination unit 11, respectively.

  The camera control circuit 21 drives and controls the zoom motor 12 by the zoom motor control circuit 29 to move the imaging lens 1 along the optical axis 2 to change the focal length of the imaging lens 1 from the wide angle to the telephoto.

  FIG. 3 is a diagram showing an example of the relationship between the photographing range in the camera shown in FIG. 1 and the illuminance detection range of the illuminance sensor 8.

  FIG. 3 shows an example in which the focal length of the imaging lens 1 is a wide angle. In this case, the shooting range 31 is larger than the illuminance detection range 32.

  FIG. 4 is a diagram showing another example of the relationship between the shooting range in the camera shown in FIG. 1 and the illuminance detection range of the illuminance sensor 8.

  FIG. 4 shows an example in which the focal length of the imaging lens 1 is telephoto. In this case, the shooting range 41 is smaller than the illuminance detection range 42.

  Here, the mode switching operation between the day mode (color photographing mode) and the night mode (monochrome photographing mode) performed in the camera shown in FIG. 1 will be described.

  FIG. 5 is a flowchart for explaining mode determination processing for mode switching operation performed in the camera shown in FIG. The process according to the illustrated flowchart is performed under the control of the camera control circuit 21, and is automatically and repeatedly executed, for example, when the camera is turned on.

  When the mode determination process is started, the camera control circuit 21 obtains a first illuminance detection result (subject illuminance Y1) from the photometry circuit 26 (step S501). Subsequently, the camera control circuit 21 obtains a second illuminance detection result (subject illuminance Y2) from the illuminance sensor control circuit 23 (step S502).

  Next, the camera control circuit 21 determines whether or not the current shooting mode is the day mode (step S503). When the shooting mode is the day mode (YES in step S503), the camera control circuit 21 compares the subject illuminance Y1 with a preset illuminance threshold Yn, and determines whether or not the subject illuminance Y1 <illuminance threshold Yn. Is determined (step S504).

  If the subject illumination Y1 <the illumination threshold Yn (the subject illumination Y1 is less than the illumination threshold) (YES in step S504), the camera control circuit 21 obtains a difference Ydiff between the subject illuminations Y1 and Y2 (step S505). Then, the camera control circuit 21 switches the shooting mode from the day mode to the night mode (step S506). At this time, the camera control circuit 21 controls the IR cut filter control circuit 25 to remove the infrared cut filter 4 from the optical axis 2 in accordance with the switching from the day mode to the night mode.

  Subsequently, the camera control circuit 21 determines whether illumination by the infrared illumination unit 11 is performed (step S507). When illumination by the infrared illumination unit 11 is performed (YES in step S507), the camera control circuit 21 compares the difference Ydiff with a preset difference threshold Yth, and the difference Ydiff <difference is determined based on the comparison result. It is determined whether or not the threshold value Yth is reached (step S508).

  If difference Ydiff <difference threshold Yth (difference is less than difference threshold) (YES in step S508), camera control circuit 21 stores the determination result in the built-in memory as the first determination result (step S509). Then, the camera control circuit 21 obtains the subject illuminance Y2 detected by the illuminance sensor 11 again from the illuminance sensor control circuit 23 (step S510).

  The process in step S510 is performed because the illumination by the infrared illumination unit 11 is performed, and the subject illuminance Y2 obtained in the process in step S502 changes due to the influence of the infrared illumination on the output of the illuminance sensor 11. It is done because there is something to do.

  Subsequently, the camera control circuit 21 calculates a first switching threshold Yd1 used when switching from the night mode to the day mode based on the subject illuminance Y2 obtained in the process of step S510 (step S511).

  Here, for example, the camera control circuit 21 calculates the first switching threshold Yd1 by Yd1 = Y2 + α. After the process of step S511, the camera control circuit 21 ends the mode determination process.

  The variable α indicates hysteresis for preventing hunting at the time of switching the photographing mode. If the variable α is set large, hunting can be better prevented. On the other hand, if the variable α is set small, switching from the night mode to the day mode can be performed more quickly.

  Note that if the first switching threshold Yd1 is equal to or lower than the illuminance threshold Yn, there is a possibility that the mode is switched to the night mode again after switching to the day mode. Therefore, the first switching threshold Yd1 needs to be larger than the illuminance threshold Yn. That is, it is necessary to set a lower limit value for the first switching threshold Yd1.

  If difference Ydiff ≧ difference threshold Yth (difference is greater than or equal to difference threshold) (NO in step S508), camera control circuit 21 stores the determination result as a second determination result in the built-in memory (step S512). Then, the camera control circuit 21 obtains the subject illuminance Y1 corresponding to the image signal anew from the photometry circuit 26 (step S513).

  The process in step S513 is performed because the subject illuminance Y1 obtained in the process in step S501 is changed by switching to the night mode that receives light including near infrared light.

  Subsequently, the camera control circuit 21 calculates a second switching threshold Yd2 for switching from the night mode to the day mode based on the subject illuminance Y1 obtained in the process of step S513 (step S514). Here, for example, the camera control circuit 21 calculates the second switching threshold Yd2 by Yd2 = Y1 + α.

  Note that a lower limit is set for the second switching threshold Yd2 as well as the first switching threshold Yd1. After the process of step S511, the camera control circuit 21 ends the mode determination process.

  If the illumination by the infrared illumination unit 11 is not performed (NO in step S507), the camera control circuit 21 proceeds to the process in step S513 described above. If subject illumination Y1 ≧ illuminance threshold Yn (NO in step S504), camera control circuit 21 ends the mode determination process.

  If the shooting mode is not the day mode (NO in step S503), that is, if the shooting mode is the night mode, the camera control circuit 21 determines whether illumination by the infrared illumination unit 11 is being performed (step). S515). When illumination by the infrared illumination unit 11 is performed (YES in step S515), the camera control circuit 21 determines whether or not the determination result stored in the built-in memory is the first determination result (step S515). S516).

  If the determination result stored in the built-in memory is the first determination result (YES in step S516), the camera control circuit 21 selects the subject luminance Y2 as the selected illuminance detection result, and the subject illuminance Y2 and the first illuminance The switching threshold Yd1 is compared to determine whether or not the subject luminance Y2> the first switching threshold Yd1 is satisfied (step S517).

  If subject luminance Y2> first switching threshold Yd1 (YES in step S517), camera control circuit 21 switches the shooting mode from the night mode to the day mode (step S518). At this time, the camera control circuit 21 controls the IR cut filter control circuit 25 to insert the infrared cut filter 4 onto the optical axis 2 in accordance with the switching from the night mode to the day mode. Then, the camera control circuit 21 ends the mode determination process.

  If the subject brightness Y2 ≦ the first switching threshold Yd1 (NO in step S517), the camera control circuit 21 ends the mode determination process.

  If illumination by the infrared illumination unit 11 is not performed (NO in step S515), the camera control circuit 21 selects the subject illuminance Y1 as the selected illuminance detection result, and the subject illuminance Y1 and the second switching threshold Yd2 To determine whether or not subject illuminance Y1> second switching threshold Yd2 is satisfied (step S519). If the subject luminance Y1> the second switching threshold Yd2 (YES in step S519), the camera control circuit 21 proceeds to the process of step S518 and switches the shooting mode from the night mode to the day mode.

  On the other hand, when the subject luminance Y1 ≦ the second switching threshold Yd2 (NO in step S519), the camera control circuit 21 ends the mode determination process.

  If the determination result stored in the internal memory is not the first determination result (NO in step S516), that is, if the determination result stored in the internal memory is the second determination result, the camera control circuit 21 The process proceeds to step S519, and it is determined whether or not subject illumination Y1> second switching threshold Yd2.

  As described above, in the first embodiment of the present invention, when performing infrared illumination, the night mode is changed from the night mode to the day mode using any subject illuminance based on the difference Ydiff between the subject illuminance Y1 and the subject illuminance Y2. Determine whether to perform switching control.

  Here, when the difference Ydiff is less than the predetermined difference threshold Yth, the difference between the shooting range and the illuminance detection range is small, and the reliability of the subject illuminance Y2 is high, and the camera control circuit 21 determines the night mode according to the subject illuminance Y2. Controls switching from day mode to day mode. That is, the camera control circuit 21 inserts the infrared cut filter 4 on the optical axis 2 in accordance with the subject illumination Y2.

  On the other hand, if the difference Ydiff is equal to or greater than the predetermined difference threshold Yth, it is assumed that the difference between the shooting range and the illuminance detection range is large and the reliability of the subject illuminance Y2 is low. Control. That is, the camera control circuit 21 inserts the infrared cut filter 4 on the optical axis 2 in accordance with the subject illuminance Y1.

  When infrared illumination is not performed, since the infrared component in the captured image is small, the reliability of the subject illumination Y1 is assumed to be high, and the camera control circuit 21 switches from the night mode to the day mode according to the subject illumination Y1. To control. That is, the camera control circuit 21 inserts the infrared cut filter 4 on the optical axis 2 in accordance with the subject illuminance Y1.

  Thereby, the mode switching control can be performed using the subject illumination Y1 or Y2 suitable for the shooting scene. That is, even if the infrared light reflectance is different, the shooting mode can be switched with high accuracy. Further, the infrared cut filter 4 can be inserted and removed accurately and stably.

  In the first embodiment described above, the difference is obtained when comparing the subject illuminance Y1 and the subject illuminance Y2, but instead of the difference, for example, the ratio of the subject illuminance Y1 and the subject illuminance Y2 May be used.

  That is, if the ratio of the subject illuminance Y1 to the subject illuminance Y2 is a first determination result that is less than a preset ratio threshold, the camera control circuit 21 performs IR cut filter insertion / extraction control according to the subject illuminance Y2. . The camera control circuit 21 performs IR cut filter insertion / extraction control in accordance with the subject illuminance Y1 when the ratio is the second determination result in which the ratio is equal to or greater than the ratio threshold.

[Second Embodiment]
Next, an example of a camera according to the second embodiment of the present invention will be described. The configuration of the camera according to the second embodiment is the same as that of the camera shown in FIGS. 1 and 2, and the relationship between the shooting range and the illuminance detection range is the relationship shown in FIGS.

  FIG. 6 is a flowchart for explaining mode determination processing for mode switching operation performed in the camera according to the second embodiment of the present invention.

  In the flowchart shown in FIG. 6, the same steps as those in the flowchart shown in FIG.

  If infrared irradiation is performed in step S507 (YES in step S507), the camera control circuit 21 determines whether or not difference Ydiff <difference threshold Yth or subject illumination Y1> subject illumination Y2. Determination is made (step S608). If difference Ydiff <difference threshold Yth or subject illuminance Y1> subject illuminance Y2 (YES in step S608), camera control circuit 21 proceeds to the process of step S509, and the determination result is the first determination. As a result, it is stored in the built-in memory.

  On the other hand, if difference Ydiff ≧ difference threshold Yth and subject illuminance Y1 ≦ subject illuminance Y2 (the first illuminance detection result is equal to or lower than the second illuminance detection result) (NO in step S608), camera control circuit 21 Then, the process proceeds to step S512, and the determination result is stored in the built-in memory as the second determination result.

  Thus, in the second embodiment of the present invention, even if the difference between the subject illuminance Y1 and the subject illuminance Y2 is greater than or equal to the difference threshold Yth, if the subject illuminance Y1 is greater than the subject illuminance Y2, it is less than the illuminance threshold Yn. It is assumed that the subject illuminance Y2 smaller than the subject illuminance Y1 is substantially equal to the subject illuminance Y1, and the reliability of the subject illuminance Y2 is high. Then, the camera control circuit 21 performs switching control from the night mode to the day mode according to the subject illuminance Y2. That is, the camera control circuit 21 inserts the infrared cut filter 4 on the optical axis 2 in accordance with the subject illumination Y2.

  Thereby, in the second embodiment, it is possible to perform the mode switching control using the subject illuminance suitable for the shooting scene without being affected by the infrared illumination more than in the first embodiment. That is, even if the infrared light reflectance is different, the shooting mode can be switched with high accuracy.

  In the second embodiment described above, the difference is obtained when comparing the subject illuminance Y1 and the subject illuminance Y2. However, instead of the difference, for example, the ratio of the subject illuminance Y1 and the subject illuminance Y2 May be used.

  In other words, the camera control circuit 21 determines that the ratio of the subject illuminance Y1 and the subject illuminance Y2 is less than a preset ratio threshold value or the subject illuminance is the first determination result that the subject illuminance Y1 is larger than the subject illuminance Y2. The IR cut filter insertion / extraction control is performed according to Y2. On the other hand, the camera control circuit 21 performs IR cut filter insertion / extraction control according to the subject illuminance Y1 when the ratio is equal to or greater than the ratio threshold value and the subject illuminance Y1 is the second illuminance Y2 or less. Do.

  As is clear from the above description, in the example shown in FIGS. 1 and 2, the photometry circuit 26 functions as the first detection means, and the illuminance sensor 8 and the illuminance sensor control circuit 23 function as the second detection means. . The camera control circuit 21 functions as selection means and mode switching control means, and the camera control circuit 21 and the infrared cut filter insertion / extraction motor 6 function as insertion / extraction control means.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to these embodiment, Various forms of the range which does not deviate from the summary of this invention are also included in this invention. .

  For example, the function of the above embodiment may be used as a control method, and this control method may be executed by the imaging apparatus. Further, a program having the functions of the above-described embodiments may be used as a control program, and the control program may be executed by a computer included in the imaging apparatus. The control program is recorded on a computer-readable recording medium, for example.

[Other Embodiments]
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

DESCRIPTION OF SYMBOLS 1 Imaging lens 3 Filter switching mechanism 4 Infrared cut filter 5 Transparent substrate 6 Infrared cut filter insertion / extraction motor 7 Imaging element 8 Illuminance sensor 10 Control circuit 11 Infrared illumination part 12 Zoom motor

Claims (11)

An image pickup apparatus having an image pickup element that forms an optical image through a photographing optical system and outputs an image signal corresponding to the optical image,
Infrared light reducing means for reducing the amount of infrared light contained in the optical image inserted between the imaging optical system and the image sensor and reaching the image sensor;
First detection means for detecting a luminance of a subject according to the image signal and obtaining a first illuminance detection result;
A second detection unit disposed at a different position from the image sensor and detecting a luminance of the subject to obtain a second illuminance detection result;
The first illuminance detection result and the second illuminance detection result are compared, and depending on the comparison result, either the illuminance detection result of the first detection means or the illuminance detection result of the second detection means A selection means for selecting one of them as a selected illuminance detection result;
Control means for performing control to insert the infrared light reducing means into an optical path between the imaging optical system and the imaging element according to the selected illuminance detection result;
An imaging device comprising: When the difference between the first illuminance detection result and the second illuminance detection result is a first determination result that is less than a preset difference threshold value, the selection unit detects the illuminance detection of the second detection unit. results were selected as the selected illuminance detection result, if the difference is in the second determination result is not less than the difference threshold, the selection means the illuminance detection result of said first detecting means as the selected illuminance detection result The imaging apparatus according to claim 1, wherein the imaging apparatus is selected. The first difference between the first illuminance detection result and the second illuminance detection result is less than a preset difference threshold, or the first illuminance detection result is larger than the second illuminance detection result. The selection means selects the illuminance detection result of the second detection means as the selected illuminance detection result, the difference is not less than the difference threshold value, and the first illuminance detection result is The selection means selects an illuminance detection result of the first detection means as the selected illuminance detection result when the second determination result is equal to or less than the second illuminance detection result. The imaging device described in 1. If the ratio of the first illuminance detection result and the second illuminance detection result is a first determination result that is less than a preset ratio threshold, the selection means detects the illuminance detection of the second detection means. When a result is selected as the selected illuminance detection result, and the ratio is a second determination result that is equal to or greater than the ratio threshold, the selection means uses the illuminance detection result of the first detection means as the selected illuminance detection result. The imaging apparatus according to claim 1, wherein the imaging apparatus is selected. A ratio between the first illuminance detection result and the second illuminance detection result is less than a preset ratio threshold, or the first illuminance detection result is larger than the second illuminance detection result. The selection means selects the illuminance detection result of the second detection means as the selected illuminance detection result, the ratio is greater than or equal to the ratio threshold value, and the first illuminance detection result is The selection means selects an illuminance detection result of the first detection means as the selected illuminance detection result when the second determination result is equal to or less than the second illuminance detection result. The imaging device described in 1.   The photographing mode is switched to the color photographing mode as the infrared light reducing means is inserted into the optical path, and the photographing mode is changed to the monochrome photographing mode as the infrared light reducing means is removed from the optical path. The imaging apparatus according to claim 1, further comprising a mode switching control unit that switches between the two.   The mode switching control means switches the photographing mode to the monochrome photographing mode when the first photographing detection result is less than a predetermined illuminance threshold when the photographing mode is the color photographing mode. The imaging device according to claim 6. The photographing mode is switched to the color photographing mode as the infrared light reducing means is inserted into the optical path, and the photographing mode is changed to the monochrome photographing mode as the infrared light reducing means is removed from the optical path. Mode switching control means for switching to
Illuminating means for illuminating the subject with infrared light;
When the photographing mode is the monochrome photographing mode, the selection unit obtains the illuminance detection result of the second detection unit when the first determination result is obtained while the illumination unit performs illumination. Is selected as the selected illuminance detection result, and when the second determination result is obtained when illumination by the illumination unit is performed, the illuminance detection result of the first detection unit is used as the selected illuminance detection result. The imaging device according to claim 2 , wherein the imaging device is selected. When the shooting mode is the monochrome shooting mode, the selection unit selects the illuminance detection result of the first detection unit as the selected illuminance detection result when illumination by the illumination unit is not performed. The imaging apparatus according to claim 8, wherein the imaging apparatus is characterized. An optical image is formed through a photographing optical system, and an image sensor that outputs an image signal corresponding to the optical image, and the image sensor that is inserted between the photographing optical system and the image sensor and reaches the image sensor. An image pickup apparatus control method comprising an infrared light reduction means for reducing the amount of infrared light contained in an optical image,
A first detection step of detecting a luminance of a subject according to the image signal and obtaining a first illuminance detection result;
A second detection step of obtaining a second illuminance detection result by detecting the luminance of the subject by an illuminance sensor disposed at a position different from the image sensor;
The first illuminance detection result and the second illuminance detection result are compared, and either the illuminance detection result according to the image signal or the illuminance detection result by the illuminance sensor is selected according to the comparison result A selection step to select as the illuminance detection result;
A control step of performing control to insert the infrared light reduction means into an optical path between the imaging optical system and the imaging element according to the selected illuminance detection result;
A control method characterized by comprising: An optical image is formed through a photographing optical system, and an image sensor that outputs an image signal corresponding to the optical image, and the image sensor that is inserted between the photographing optical system and the image sensor and reaches the image sensor. A control program used in an imaging apparatus having infrared light reducing means for reducing the amount of infrared light contained in an optical image,
In the computer provided in the imaging device,
A first detection step of detecting a luminance of a subject according to the image signal and obtaining a first illuminance detection result;
A second detection step of obtaining a second illuminance detection result by detecting the luminance of the subject by an illuminance sensor disposed at a position different from the image sensor;
The first illuminance detection result and the second illuminance detection result are compared, and either the illuminance detection result according to the image signal or the illuminance detection result by the illuminance sensor is selected according to the comparison result A selection step to select as the illuminance detection result;
A control step of performing control to insert the infrared light reduction means into an optical path between the imaging optical system and the imaging element according to the selected illuminance detection result;
A control program characterized by causing