TW201639351A - Photographic apparatus - Google Patents

Abstract

The invention provides a photographic apparatus capable of effectively inhibiting flickering problems by simple optical shutter control. Photographic apparatus 1 has: photographic device 40; lens 10 causes light from a target area to be focused on photographic device 40; optical shutter 30 provided at a target area side relative to photographic device 40; and control part 50. In the photographic period of a frame, control part 50 causes optical shutter 30 to turn on several times so that light obtained by lens 10 is guided to photographic device 40. Accordingly, flickering problems can be inhibited effectively by simple optical shutter control.

Description

Photography device

The present invention relates to a photographing apparatus for photographing a target area, and is particularly suitable for use in photographing a landscape including a traffic light.

A photographing device that photographs a street or an intersection with a surveillance camera is known. In such a photographing apparatus, the image taken is used for, for example, a search for a traffic accident. At the time of the search, in addition to confirming the condition of the vehicle or pedestrian, the status of the traffic light is also confirmed. That is, it is confirmed that the traffic light is lit in which one of red, blue, and yellow colors are in the event of an accident.

In recent years, light sources for traffic lights have used light-emitting diodes. When the light-emitting diode is driven by a commercial alternating current power source, the light-emitting diode is turned on and off in a short cycle. Therefore, the traffic light with the light-emitting diode as the light source is also turned on and off in a short cycle when the colors are turned on. When the traffic signal light is turned on and off in a short cycle as described above, the brightness of the captured image of the traffic light is changed between frame frames, and flicker is generated in the captured image of the traffic light. When the image of the traffic light is blinking, there is a situation in which the lighting color of the traffic light cannot be correctly confirmed at the time of the search.

Patent Document 1 below discloses an imaging device that can suppress flicker generated by LED illumination or the like. When the photographing device determines that there is flicker, the following control is performed, so that the timings of the charge-clearing pulse and the charge-reading pulse for performing the shutter control of the CCD sensor are changed in each field to be able to be in each field. The in-phase portion of the illumination period of the illumination is exposed to the camera.

Patent Document 1: Japanese Laid-Open Patent Publication No. 2011-193065

In the method of Patent Document 1, it is necessary to have a complex shutter control in which the timings of the charge erasing pulse and the charge reading pulse are changed in each field, and the camera exposes the same phase portion of the illumination period of illumination in each field.

In view of the above problems, it is an object of the present invention to provide a photographing apparatus which can effectively suppress flicker by simple shutter control.

The main form of the invention relates to a photographing apparatus. The photographing apparatus of the present aspect includes: an imaging element; a lens that images light from the target area on the imaging element; a shutter that is disposed on the target area side with respect to the imaging element; and a control unit. The control unit causes the shutter to be turned on a plurality of times during the imaging period of one frame, and guides the light obtained from the lens to the imaging element.

According to the photographing apparatus of the present aspect, since the photographing element is exposed a plurality of times in the photographing period of one frame, it is easy to photograph the photographing element in the case of photographing a light source such as a traffic light or the like that is turned on and off in a short period. The photographing period receives light from the light source, and suppresses the total amount of light received from the light source to be greatly different between frame frames. Therefore, the flicker generated in the captured image of the illumination source can be effectively suppressed. Moreover, this effect can be achieved by simple control of opening and closing a plurality of shutters during the shooting cycle. Therefore, according to the photographing apparatus of the present aspect, it is possible to provide a photographing apparatus which can effectively suppress flicker by simple shutter control.

In the imaging device of the present aspect, the imaging device stores and outputs a charge corresponding to the amount of received light for each line, and the control unit overlaps portions of the charge accumulation periods of the lines on the imaging element. Control the photographic element; charge at all of the lines The shutter is opened a plurality of times during the repeated accumulation period in which the accumulation periods overlap each other. In this manner, since the photographic elements are exposed during the repeated accumulation period, the light of the target area is irradiated for the same timing and exposure period for all the lines. Therefore, in the case where the target area includes the subject moving at a high speed, the captured image of the subject is not deformed.

In the photographing apparatus of the present aspect, the control unit may repeat the opening and closing of the shutter during all of the repeated accumulation periods. In this way, the opening period of the shutter is easily included in the lighting period of the light source that is turned on and off in a short period, and the light from the light source is more reliably and more easily accepted by the image pickup element. Therefore, frame frame generation that does not include light from the light source can be suppressed.

In this case, the control unit may adjust the exposure amount of the imaging element by adjusting the opening and closing period of the shutter. In this way, the exposure amount can be smoothly adjusted.

In the photographing apparatus of the present aspect, the shutter may be a liquid crystal shutter, and the control unit may perform ON/OFF control of the shutter in a pulsed manner. In this way, the opening and closing of the shutter can be accurately performed in a short cycle.

As described above, according to the present invention, it is possible to provide a photographing apparatus which can effectively suppress flicker by simple shutter control.

The effects and significance of the present invention will be more apparent from the following description of the embodiments. However, the embodiments described below are merely illustrative of the embodiments of the present invention, and the present invention is not limited to the description of the following embodiments.

1‧‧‧Photographing device

10‧‧‧ lens

30‧‧‧Shingles

40‧‧‧Photographic components

50‧‧‧Control Department

Fig. 1(a) is a view showing the appearance of the image management system of the embodiment. Figure 1 (b) shows A diagram of an example of a captured image of an embodiment.

Fig. 2 is a view showing the configuration of a photographing apparatus of the embodiment.

Fig. 3 is a view showing the configuration of a CMOS image sensor of the embodiment.

4(a) and 4(b) are diagrams showing the read control of the CMOS image sensor of the embodiment.

Fig. 5 is a timing chart showing a method of controlling the shutter of the embodiment.

Fig. 6 is a timing chart showing a method of controlling the shutter of the embodiment.

Fig. 7 is a timing chart showing a control method of the shutter of the comparative example.

Fig. 8 is a timing chart showing a control method of the shutter of the comparative example.

9(a) and 9(b) are diagrams showing a control method of a CMOS image sensor according to a modification.

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

Fig. 1(a) is a view showing the appearance of the image management system of the embodiment.

As shown in FIG. 1(a), the image management system includes a photographing device 1 and an external device 2. The photographing apparatus 1 is a monitor camera, and is installed in the article 3 so that a street, an intersection, or the like including a traffic light can be photographed. The object 3 is, for example, a structure such as a building or the like, a roof structure, a utility pole, or the like. The photographing apparatus 1 records the photographed image on the internal recording medium at any time. The external device 2 is a portable personal computer. In addition, the external device 2 can also be other mobile information terminals such as mobile phones and tablet computers.

The image recorded on the photographing device 1 is appropriately collected and collected to the external device 2. The photographing device 1 and the external device 2 can perform wireless LAN communication. The external device 2 establishes a communication path of the wireless LAN, and downloads an image from the photographing device 1. The communication between the photographing device 1 and the external device 2 is not limited to a wireless LAN, and may be other communication methods such as Bluetooth.

Fig. 1(b) is a view showing an example of a captured image taken by the photographing apparatus 1. Here, the intersection 5 including the traffic light 4 is set as the target area. For convenience of explanation, FIG. 1(b) shows only the traffic light 4 in the direction toward the photographing device 1. The image captured by the photographing device 1 is used for, for example, a traffic accident search or the like after being recycled to the external device 2. At the time of the search, in addition to confirming the condition of the vehicle or pedestrian passing through the intersection 5, the lighting condition of the traffic light 4 is also confirmed. That is, it is confirmed that the traffic light 4 is lit in which one of red, blue, and yellow colors are in the event of an accident.

Fig. 2 is a view showing the configuration of the photographing apparatus 1.

The photographing apparatus 1 includes a lens 10, a diaphragm 20, a shutter 30, an imaging element 40, a control unit 50, a memory unit 60, and a communication unit 70.

The lens 10 takes light from the target area and images the image of the target area on the light receiving surface of the imaging element 40. The aperture 20 limits the light from the outside in response to the intensity of light from the target area, so that an appropriate amount of light is incident on the photographic element 40. The aperture 20 adjusts the aperture amount by the diaphragm driving circuit 21.

The shutter 30 is a liquid crystal shutter. The shutter 30 is, for example, a liquid crystal shutter having a characteristic of a so-called normal black type in which the transmittance is maximized in a state where a voltage is applied and the transmittance is lowered when a cutting voltage is applied. In this case, the shutter 30 transmits light in a state where a voltage is applied, and blocks the light in a state where no voltage is applied. In addition, the shutter 30 may be a so-called normal white mode liquid crystal shutter having a transmittance which is maximized in a state where no voltage is applied and a transmittance is lowered when a voltage is applied. Further, the shutter 30 may be another type of shutter as long as it can be opened and closed at a high speed. The shutter 30 is switched on and off by a driving signal from the shutter driving circuit 31.

The photographic element 40 is, for example, a CMOS image sensor. The photographic element 40 has a photodiode at a position corresponding to each pixel on the light receiving surface. The photographic element 40 is controlled by the photographic signal processing circuit 41 so as to separately charge and output the charge of the photodiode for each line.

The control unit 50 includes an arithmetic processing circuit such as a CPU (Central Processing Unit), and controls each part in accordance with a program stored in the storage unit 60. The memory unit 60 can be used as a work area when the control unit 50 performs control in addition to the storage control program. The control unit 50 controls the diaphragm driving circuit 21, the shutter driving circuit 31, and the photographing signal processing circuit 41 by the program stored in the storage unit 60. The communication unit 70 communicates with the external device 2 shown in Fig. 1(a).

Fig. 3 is a view showing the configuration of the photographic element 40 in a schematic manner. For convenience of explanation, a configuration corresponding to a portion of nine pixels is shown in FIG. 3, but actually, the same configuration is arranged in the vertical direction and the horizontal direction in accordance with the predetermined number of pixels.

The photographic element 40 has a photodiode 40a at a position corresponding to each pixel. The light diode 40a accumulates a charge corresponding to the amount of received light when receiving light. The accumulated electric charge is amplified by being converted into a voltage by the amplifier 40b. The voltage of the amplification is transmitted to the vertical signal line 40d for each line L when the switch 40c is turned ON. The transmitted voltage is temporarily saved by the row circuit 40e which is respectively disposed on the vertical signal line 40d. The stored voltage is transmitted to the horizontal signal line 40g when the row selection switch 40f is turned ON. Then, the voltage transmitted to the horizontal signal line 40g is transmitted to the photographic signal processing circuit 41. As described above, in the photographic element 40, voltage signals are transmitted for each line L.

Further, the imaging element 40 is controlled such that the charge accumulation of the photodiode 40a is performed for each line L. That is, the photodiode 40a on one line L is set to be The charge accumulation state is performed for a predetermined period, and when this period elapses, the electric charge generated by each photodiode 40a on the line L is output. This control is sequentially performed from the line L of the uppermost stage toward the line L of the lowermost stage. When the line L is in a state in which charge accumulation is possible, when light is applied to the photodiode 40a on the line L, the charge corresponding to the amount of light of the irradiated light is accumulated in each of the photodiodes 40a on the line. As described above, the electric charges accumulated in this manner are read by the respective lines L, converted into voltage signals, and output to the photographic signal processing circuit 41.

Hereinafter, a period in which each line is set to a state in which charge accumulation is possible is referred to as a "charge accumulation period".

Referring back to Fig. 2, the photographic signal processing circuit 41 sequentially sets the lines on the photographic element 40 to the charge accumulation period, and performs charge reading for each line. The photographic signal processing circuit 41 includes an A/D conversion circuit that converts a voltage signal supplied to each line of the imaging element 40 via the horizontal signal line 40g (see FIG. 3) into a digital signal, and outputs it to the control unit 50. The control unit 50 stores the digital signal (brightness signal) supplied from the photographing signal processing circuit 41 in the storage unit 60. In the above manner, the luminance signals of all the lines (one frame frame) output from the photographic signal processing circuit 41 constitute one captured image.

4(a) and 4(b) are diagrams showing the reading control of the imaging element 40. Fig. 4(a) is a view schematically showing control at the time of charge reading from each line at a normal speed (hereinafter, referred to as "normal reading mode"), and Fig. 4(b) is shown in a schematic manner at high speed. The control of the charge reading at each line (hereinafter referred to as "high-speed read mode") is shown.

The light receiving surface of the imaging element 40 and the respective lines L are schematically shown on the left side of Figs. 4(a) and 4(b). Here, the line L of the uppermost stage is set to L0, and the line of the lowermost stage is set to Ln. Further, the control timing for each line is schematically shown on the right side of Figs. 4(a) and 4(b).

Referring to Fig. 4(a), in the normal read mode, the control of the uppermost line L0 starts at timing t1 and ends at timing t2. The control of the line L1 of the next segment starts at a predetermined time later than the timing t1. In the above manner, each time the line L is changed to the lower stage, the start timing is delayed by a predetermined time and the control of each line is simultaneously performed. The start timing of the lowermost line Ln is the timing t2 delayed by Δt from the timing t1.

On the uppermost line L0, charges are accumulated from the timing t1 to the timing t2. For example, the period Δt between the timing t1 and the timing t2 is all set as the charge accumulation period. The charge accumulation period is also set for the other line L in the same manner. The charge reading of the uppermost line L0 is performed at the timing t2 of the period Δt from the timing t1.

Regarding the second segment line L1, charge is accumulated at a timing delayed by a predetermined time from the timing t1, and charge reading is performed at a timing delayed by a predetermined time from the timing t2. In the above manner, each time the line L is changed, the start timing of the charge accumulation is delayed by a predetermined time one by one, and the execution timing of the charge reading is also delayed by a predetermined time one by one. The start timing of the charge accumulation for the lowermost line Ln is the timing t2 delayed by Δt from the timing t1, and the execution timing of the charge reading is the timing t3 delayed by Δt from the timing t2.

As described above, in the normal read mode, the end timing of the charge accumulation for the uppermost line L0 is the start timing of the charge accumulation for the lowermost line Ln. Therefore, in the normal read mode, a period in which the charge accumulation periods of all the lines overlap is not generated.

Referring to FIG. 4(b), in the high-speed read mode, by increasing the charge reading speed for each line L, the amount of shift between the control start timings between the lines L is shortened compared to the normal read mode. In the example of Fig. 4(b), the offset of the control start timing between the lines L is reduced by half compared to the normal read mode. Therefore, the start timing of the control of the lowermost line Ln is delayed by only Δt/2 from the start timing t1 of the control of the uppermost line L0.

The reading speed of the electric charge of each line L is increased by reducing the number of bits when the charge signal for each line is sampled (A/D conversion) to be smaller than the number of bits in the normal reading mode. This processing is performed by the photographing signal processing circuit 41 under the control of the control unit 50 of Fig. 2 . In the high-speed reading mode, since the number of sampling bits is reduced as described above, the image quality of the captured image is slightly deteriorated compared to the normal reading mode. However, the degree of such deterioration does not pose a particular problem for the visibility in the use of a surveillance camera or the like. Alternatively, the number of sampling bits can be maintained by the improvement and speed of the imaging element 40 and the photographic signal processing circuit 41.

As described above, by setting the control mode of the imaging element 40 to the high-speed reading mode, as shown in FIG. 4(b), a repeated accumulation period in which the charge accumulation times of all the lines overlap each other is generated. Then, by performing exposure during the repeated accumulation period, light from the target region is irradiated to the respective lines L at the same timing, and the photodiodes 40a on all the lines L accumulate electric charges at the same timing with the same exposure amount. Therefore, it is possible to suppress deformation of the captured image of the subject moving at high speed. That is, the phenomenon of the rolling shutter can be suppressed, and the global shutter function using the photographic element 40 can be realized.

In the present embodiment, the control mode of the imaging element 40 is set to the high speed reading mode. Next, during all of the repeated accumulation periods, the shutter 30 is repeatedly opened and closed, and light from the target area is guided to the imaging element 40.

FIG. 5 is a timing chart showing a control method of the shutter 30.

The uppermost section of Figure 5 shows the voltage waveform of a commercial AC power supply. Here, it is assumed that the frequency of the commercial AC power source is 50 Hz. In this case, the period T1 of the voltage waveform of the commercial AC power source is 1/50 second. Figure 1 (b) of the traffic light of the traffic lights 4 use the light-emitting diodes, the light-emitting diodes, as shown in the second paragraph from the top in Figure 5, the AC voltage of the commercial AC power supply The voltage is driven by the wave rectification. The period T2 of the full-wave rectified voltage waveform is 1/100 second. Luminous two The polar body lights up during a period T3 during which the full-wave rectified voltage exceeds the lighting threshold SH1. Therefore, the lights of the respective colors of the traffic light 4 of FIG. 1(b) are turned on and off in a cycle of T2, that is, 1/100 second.

On the other hand, the imaging element 40 constitutes a captured image of one frame frame in a period of 1/60 second. That is, the photographing period T4 of the photographing apparatus 1 is 1/60 second, and the phase is shifted from the light of the respective lights of the traffic light 4 to the light-off period of 1/100 second. Therefore, the fixed position in the repeated accumulation period shown in FIG. 4(b) is set in the exposure period of a predetermined time width, and the time during which the illumination period of the traffic signal lamp 4 (light emitting diode) overlaps with each other during the exposure period. The width varies for each frame. Therefore, the brightness of the captured image of the traffic light 4 is different between the frame frames, and the captured image of the traffic light 4 is blinking.

Fig. 7 is a timing chart showing, in a schematic manner, the exposure period during which the predetermined time width is set at a fixed position of the photographing period T4, and the light received from the traffic light 4 (light emitting diode) is received by the photographing element 40. Here, the shutter 30 is opened at the end of the photographing period T4 by the time width T7 to set the exposure period. In this case, the period T81 to T83 obtained from the light of the traffic light 4 (light emitting diode) by the imaging element 40 changes between frame frames. Therefore, as shown in the schematic form in the lowermost portion of Fig. 7, the amount of light received by the imaging element 40 from the traffic light 4 (light-emitting diode) is greatly different for each frame. Therefore, the image of the traffic light 4 produces a flicker.

Fig. 8 is a timing chart showing, in a schematic manner, the amount of received light received by the photographing element 40 from the light of the traffic light 4 (light emitting diode) in the case where the time width T7 of Fig. 7 is shortened. For example, in the case where the target area is bright at noon on a sunny day, the time width T7 (shutter speed) is shortened. In this case as well, as in Fig. 7, the shutter 30 is opened at the end of the photographing period T4 by the time width T7 to set the exposure period. At this time, the periods T81 and T82 obtained by the light from the traffic light 4 (light emitting diode) by the image sensor 40 are changed between frame frames. Also, during the third photography period from the left, due to exposure The light period and the lighting period T3 of the traffic light 4 (light emitting diode) do not overlap, and therefore the light from the traffic light 4 (light emitting diode) is not taken by the imaging element 40.

Therefore, as shown in the schematic form in the lowermost part of FIG. 7, the amount of light received by the photographic element 40 from the traffic light 4 (light-emitting diode) is substantially different for each frame, and therefore, in the traffic sign The captured image of the lamp 4 produces a flicker. Further, in the frame frame corresponding to the third photographing period from the left, since the non-photographic element 40 receives the light receiving amount from the traffic light 4 (light emitting diode), it becomes a traffic number without the lighting state. The image of the Zhi 4 is captured.

On the other hand, in the present embodiment, as shown in FIG. 5, the shutter 30 is repeatedly turned ON/OFF in a pulsed manner in a predetermined cycle during the entire period of the accumulation period T5. Therefore, the opening period of the shutter 30 is easily included in the period T3 during which the traffic signal lamp 4 (light emitting diode) is turned on. Compared with the case of FIG. 7 and FIG. 8, it is difficult to generate the lack of lighting of the traffic signal lamp 4. Frame frame. In FIG. 5, during the period T61 to T63, the opening period of the shutter 30 is included in the period T3 during which the traffic light 4 (light emitting diode) is turned on. Further, since the shutter 30 is turned ON/OFF, the total light receiving amount of the light from the traffic light 4 (light emitting diode) by the photographing element 40 is between the frame frames as compared with the case of FIGS. 7 and 8. The difference is smaller. Therefore, the captured image of the traffic light 4 is less likely to cause flicker.

Further, for example, in the case where the target area is bright at noon on a sunny day, as shown in FIG. 6, the OFF period of the shutter 30 is increased to make the ON/OFF period of the shutter 30 long. Thereby, the amount of light of the light captured by the imaging element 40 from the target area is reduced. In this case, as shown in the lowermost part of Fig. 6, the light from the traffic signal lamp 4 (light emitting diode) is surely taken by the imaging element 40. Further, the total received light amount of the light from the traffic light 4 (light emitting diode) by the imaging element 40 becomes smaller between the frame frames. Therefore, the captured image of the traffic light 4 is less likely to cause flicker.

(Effects of the embodiment)

According to this embodiment, the following effects can be achieved.

As shown in FIG. 5 and FIG. 6, since the photographing element 40 is exposed a plurality of times in the photographing period T4 of one frame, the photographing element 40 is also photographed in the case of photographing the traffic light 4 that is turned on and off in a short period. It is easy to receive the light from the traffic light 4 in each shooting cycle T4, and it is possible to suppress the total light receiving amount of the light from the traffic light 4 to be greatly different between frame frames. Therefore, the flicker generated in the captured image of the traffic light 4 can be effectively suppressed. Moreover, this effect can be achieved by simple control of opening and closing the shutters 30 in the shooting cycle. Therefore, according to the present embodiment, it is possible to provide the photographing apparatus 1 which can effectively suppress flicker by simple shutter control.

Further, the imaging device 40 accumulates and outputs the electric charge corresponding to the received light amount for each line L, and the control unit 50 controls the imaging element in a high-speed reading mode such that portions of the charge accumulation periods of the respective lines L on the imaging element 40 overlap each other. 40. Further, the control unit 50 turns on the shutter 30 a plurality of times in the repeated accumulation period T5 in which the charge accumulation periods of all the lines L overlap each other. In this manner, since the imaging element 40 is exposed in the repeated accumulation period T5, the light of the target area is irradiated for the same timing and exposure period for all the lines L. Therefore, in the case where the target area includes the subject moving at a high speed, the captured image of the subject is not deformed.

Moreover, the control unit 50 reverses the opening and closing of the shutter 30 during all of the repeated accumulation period T5. Thereby, the opening period of the shutter 30 is easily included in the lighting of the traffic light 4 that is turned off in a short cycle, and the light from the traffic light 4 is more reliably and easily accepted by the imaging element 40. Therefore, frame frame generation that does not include light from the traffic light 4 can be suppressed.

Further, as shown in FIG. 6, the control unit 50 adjusts the exposure amount to the imaging element 40 by adjusting the opening and closing period of the shutter 30. In this way, the exposure amount can be smoothly adjusted.

Further, the shutter 30 is a liquid crystal shutter; the control unit 50 has the shutter 30 in a pulse shape Perform ON/OFF control. Thereby, the opening and closing of the shutter 30 can be accurately performed in a short cycle.

(change example)

In the above embodiment, as shown in FIG. 4(b), the repetition accumulation period is generated by setting the control mode of the imaging element 40 to the high-speed reading mode. However, as shown in FIG. 9(b), the imaging element 40 may be used. The control mode is set to a low speed mode to generate a repeated accumulation period. In the low speed mode, the shooting period of each line is set to twice the normal reading mode shown in Fig. 9(a), that is, 2?t. In this case, for example, the shutter 30 is also controlled to be turned ON/OFF in a predetermined period during all of the repeated accumulation periods. As a result, similarly to the above-described embodiment, it is possible to suppress the occurrence of flicker in the captured image of the traffic light 4, and it is possible to suppress the acquisition of the captured image of the traffic light 4 including the unlit state.

Although the embodiments and the modified examples of the present invention have been described above, the present invention is not limited to the above-described embodiments and modifications, and various modifications may be made in addition to the above description.

For example, in the above embodiment, the holographic sensor of the rolling shutter type is used as the imaging element 40 to realize the global shutter function, but a CCD image sensor of the global shutter type may be used as the imaging element 40. In this case, during the photographing of one frame, the shutter 30 is set to the transmission state a plurality of times, and preferably, the shutter 30 is repeatedly ON/OFF in a certain period during the photographing period of one frame. control.

Further, in the above-described embodiment, the shutter 30 is controlled so as to be turned ON/OFF in the entire period of the repeated accumulation period. However, the shutter 30 can be controlled to be turned ON/OFF in a partial period during the repeated accumulation period. In this case, it is preferable that the period in which the shutter 30 is turned ON/OFF is set as long as the ON period of the shutter 30 is easily included in the light-emitting period of the light-emitting diode.

Further, in the above-described embodiment, the repetition period of the ON/OFF of the shutter 30 is constant, but the repetition period may not be constant as long as the shutter is turned ON/OFF a plurality of times.

Further, in the above embodiment, the subject is the traffic light 4, but the subject may be a non-traffic light 4 or another light source that is turned on and off in a short cycle.

Further, in the above-described embodiment, the imaging device 1 is installed on a building exterior wall, a structure on a roof, a utility pole, or the like. For example, the configuration of the imaging device 1 may be integrally included in a street lamp or the like.

Further, the photographing apparatus 1 is not limited to the monitoring camera, and may be another photographing apparatus including the photographing unit and the storage unit.

Further, the embodiments of the present invention can be variously modified as appropriate within the scope of the technical idea described in the claims.

1‧‧‧Photographing device

10‧‧‧ lens

20‧‧‧Light

21‧‧‧Optical drive circuit

30‧‧‧Shingles

31‧‧‧Shutter drive circuit

40‧‧‧Photographic components

41‧‧‧Photo signal processing circuit

50‧‧‧Control Department

60‧‧‧Memory Department

70‧‧‧Communication Department

Claims (5)

A photographing apparatus comprising: a photographing element; a lens that images light from a target area on the photographing element; a shutter that is disposed on the target area side with respect to the photographing element; and a control unit; the control unit in a frame frame The shutter is opened a plurality of times during the photographing cycle, and the light obtained from the lens is guided to the photographing element. The photographic apparatus of claim 1, wherein the photographic element accumulates and outputs a charge corresponding to a received light amount for each line; and the control unit partially overlaps each other during charge accumulation of each line on the photographic element. The photographic element is controlled in a manner that the shutter is opened a plurality of times during a repeated accumulation period in which all of the lines are accumulated during charge accumulation. The photographing apparatus of claim 2, wherein the control unit repeatedly opens and closes the shutter during all of the repeated accumulation periods. The photographing apparatus of claim 3, wherein the control unit adjusts an exposure amount of the photographing element by adjusting an opening and closing period of the shutter. The photographing apparatus according to any one of claims 1 to 4, wherein the shutter is a liquid crystal shutter; and the control unit performs ON/OFF control on the shutter in a pulsed manner.