JP2009008842A - Photographing system, photographing device, method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform quick photographing after accurately focusing on a subject even in circumstances that the position of the subject is hardly visually recognized such as when the subject goes away from a photographing device or the subject is lost in the crowd. <P>SOLUTION: The present position information (x1, y1 and Z1) of the subject 200 is obtained from a radio transmitter 202 of the subject 200. The present position information (x2, y2 and z2) of a camera 100 is obtained on the basis of an electric wave signal received by a GPS receiver 30. Then, a distance L between the camera 100 and the subject 200 is calculated to obtain a focusing position corresponding to the distance L, thereby moving a focus lens to the focusing position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to focus adjustment during photographing.

  In Patent Document 1, GPS is mounted on both the subject and the camera, and automatic tracking shooting is performed.

  In Patent Document 2, the position of the subject is searched by GPS or the like, and the direction of the camera and the lens (angle of view) are adjusted.

In Patent Documents 3 and 4, the absolute position of the subject is obtained from the absolute position of the camera and the relative position to the subject.
JP 2004-112615 A Japanese Patent Laid-Open No. 2005-20205 JP 2001-91253 A JP 2001-128052 A

  Citations 1 and 2 do not mention anything about focusing. In Patent Documents 3 and 4, it takes time to obtain the distance because the subject is imaged to obtain the relative distance.

  The present invention makes it possible to quickly shoot with accurate focus on a subject even when the subject is difficult to see because the subject is away from the photographing apparatus or is crowded.

  An imaging system according to the present invention is installed in a subject, a subject position acquisition unit that acquires current position information of the subject based on a radio wave signal from a GPS satellite, and current position information of the subject acquired by the subject position acquisition unit Is installed in the photographing device, and acquires the current position information of the photographing device based on the radio wave signal from the GPS satellite. Based on the distance calculated by the distance calculation unit, the distance calculation unit that calculates the distance between the subject and the imaging device based on the current position information of the subject and the current position information of the imaging device, An adjustment unit that adjusts the focus of the imaging lens of the imaging apparatus.

  Thus, the photographing lens can be adjusted to the in-focus state regardless of where the subject is located or the photographing device is not directed toward the subject, so that time spent for photographing can be reduced.

  An altitude difference detection unit that detects an altitude difference with respect to the subject from the imaging device is further provided, and the distance calculation unit is configured to detect the subject based on the current position information of the subject, the current position information of the imaging device, and the altitude difference detected by the altitude difference detection unit. You may calculate the distance between imaging devices.

  That is, a correct distance can be obtained for a subject having an altitude difference from the photographing apparatus, and focusing accuracy is improved.

  A determination unit for determining whether the distance calculated by the distance calculation unit is less than a distance that causes a predetermined measurement error; and if the distance is less than a distance that causes a predetermined measurement error, contrast AF and the predetermined The focus adjustment may be performed by a focus adjustment means that can ensure an accuracy less than the measurement error.

  That is, when the distance measurement error is so large that the distance measurement result cannot be ignored, the distance measurement accuracy can be improved by switching to a distance measurement method with higher distance measurement accuracy.

  An optical axis azimuth detecting unit that detects the azimuth of the optical axis of the photographing lens of the photographing device, an angle of view detecting unit that detects an angle of view of the photographing device, current position information of the subject, and current position information of the photographing device are detected. A subject display position calculation unit that calculates a display position of the subject in a through image displayed on the display device of the photographing device based on the direction of the optical axis of the photographing lens of the photographing device and the detected angle of view of the photographing device; And a display control unit that superimposes and displays a marker indicating the display position of the subject on the through image based on the displayed display position of the subject.

  That is, even when it is difficult to identify the subject visually, the position of the subject is displayed on the display device of the photographing apparatus together with the through image, so that the angle of view can be surely adjusted with respect to the subject.

  An image capturing apparatus according to the present invention includes an image capturing unit that captures a subject image received through an imaging lens, a receiving unit that receives current position information of a subject based on a radio wave signal from a GPS satellite, and a radio wave from the GPS satellite. An imaging device position acquisition unit that acquires current position information of the imaging device based on the signal, and a distance calculation unit that calculates a distance between the subject and the imaging device based on the current position information of the subject and the current position information of the imaging device And an adjusting unit that adjusts the focus of the photographing lens based on the distance calculated by the distance calculating unit.

    An imaging method according to the present invention includes a step of receiving current position information of a subject based on a radio wave signal from a GPS satellite, a step of acquiring current position information of an imaging device based on a radio wave signal from the GPS satellite, And calculating the distance between the subject and the imaging device based on the current location information and the current location information of the imaging device, and adjusting the focus of the imaging lens based on the calculated distance.

  A program for causing a computer to execute this photographing method is also included in the present invention.

  Thus, the photographing lens can be adjusted to the in-focus state regardless of where the subject is located or the photographing device is not directed toward the subject, so that time spent for photographing can be reduced.

<First Embodiment>
FIG. 1 is a configuration diagram of a camera system according to a preferred embodiment of the present invention. This system includes a camera 100, a GPS receiver 201 attached to a subject 200, and a wireless transmitter 202.

  The GPS receiver 201 receives from the GPS satellite 300 a radio signal including satellite orbits and time data from an atomic clock mounted on the satellite.

 The wireless transmitter 202 associates the radio signal received by the GPS receiver 201 with identification information unique to the subject and wirelessly transmits it to the camera 100 using radio waves or light.

  The camera 100 includes a lens barrel 1, a CPU 7, a focus motor 9, a GPS receiver 30, a wireless receiver 31, and the like. The relative distance calculation unit 7c is a program for causing the CPU 7 to execute step S6 described later, and is recorded in the ROM 24. The configuration of the camera 100 will be described in detail below.

  FIG. 2 is a block diagram of the camera 100. The camera 100 is provided with an operation unit 27 for performing various operations when the user uses the camera 100. The operation unit 27 includes a power switch 27a for turning on the power for operating the camera 100, a menu switch 27b for freely switching various menu displays, a shutter button 27d for outputting a shooting start instruction to the CPU 7, and a vertical or horizontal direction. Zoom switch that can be operated in one direction, zooming in the telephoto (TELE) direction by operating the switch in one direction, and zooming in the wide-angle (WIDE) direction by operating in the other direction 27e, a cross button 27f for setting and selecting various menus or zooming is provided.

  In addition, the camera 100 includes a display device 19 that includes a liquid crystal display, an organic EL, and the like, and displays a captured image, a reproduced image, and the like, and a driver 18 that generates a video signal and supplies the video signal to the display device 19. ing.

  Further, the camera 100 is provided with a flash light emitting unit 12 that emits flash light, and a flash control circuit 17 that controls the light emission timing and light emission time of the flash light emitting unit 12 in accordance with a command from the CPU 7.

  In addition, the camera 100 includes a lens barrel 1 having a photographing lens including a focus lens and a zoom lens, and a CCD 3 that is an imaging element that converts a subject image formed through the photographing lens into an analog image signal. And are provided. The image sensor is not limited to a CCD, but may be another device such as a CMOS.

  In addition to the iris mechanism (aperture) 2, the photographing lens includes a zoom lens and a focus lens. The zoom motor 10 performs zooming by driving the zoom lens, and the focus motor 9 performs focus adjustment by driving the focus lens. Each is driven by an iris motor 8 that adjusts the aperture.

  The image pickup device such as the CCD 3 generates an image signal by accumulating charges generated by irradiated subject light for a variable charge accumulation time (exposure period). Image signals for each frame are sequentially output from the CCD 3 at a timing synchronized with the vertical synchronization signal VD output from the timing generator (TG) 4.

  On the light receiving surface of the CCD 3, minute color filters of R, G, B are arranged in a matrix, and an image signal including each color component of R, G, B is amplified to an appropriate level by the signal processing circuit 5. After that, the image processing circuit 6 converts the image data into R, G, and B image data. Note that various pixel arrangements such as a Bayer type or a honeycomb type can be adopted for the pixel arrangement of the CCD 3.

  When the CCD 3 is used as the image sensor, an optical low-pass filter that removes unnecessary high-frequency components in the incident light is provided in order to prevent generation of color false signals, moire fringes, and the like. In addition, an infrared cut filter that absorbs or reflects infrared light in the incident light and corrects sensitivity characteristics unique to the CCD 3 having high sensitivity in a long wavelength region is provided.

  The camera 100 also adjusts the white balance of the subject image represented by the analog image signal from the CCD 3, adjusts the slope (γ) of the straight line in the gradation characteristics of the subject image, and further amplifies the analog image signal. A signal processing circuit 5 including a variable amplifier is provided.

  Further, the camera 100 includes an image processing circuit 6 for A / D converting an analog signal from the signal processing circuit 5 into digital R, G, B image data, and an R, G, B image from the image processing circuit 6. A RAM 25 for storing data is provided.

  In the present embodiment, the image processing circuit 6 has an 8-bit quantization resolution, and analog R, G, B imaging signals output from the signal processing circuit 5 are level 0 to 255 according to the amount of light received by the CCD 3. Converted into R, G, B digital image data and output. However, this quantization resolution is merely an example and is not an essential value for the present invention.

  The camera 100 also includes a battery 29 and a power supply circuit 28.

  The TG 4 outputs a vertical synchronization signal VD for driving the CCD 3, a drive signal including a high-speed sweep pulse P, a control signal for controlling the signal processing circuit 5 and the image processing circuit 6, and a control signal for controlling the I / F 26. . Further, a control signal from the CPU 7 is input to the TG 4.

  The CPU 7 controls the zoom motor driver 15, the focus motor driver 14, and the iris motor driver 13 to drive the zoom motor 10, the focus motor 9, and the iris motor 8 to measure the subject.

  When the shutter button 27d is half-pressed, the CPU 7 performs subject photometry (EV value calculation) based on image data periodically (every 1/30 second to 1/60 second) obtained by the CCD 3. Do. Next, the CPU 7 detects the average brightness (subject brightness) of the subject and calculates an exposure value (EV value) suitable for photographing.

  Then, the CPU 7 determines the exposure value including the iris value (F value) of the iris 2 and the electronic shutter (shutter speed) of the CCD 3 based on the obtained EV value in accordance with a predetermined program diagram stored in the ROM 24. To do.

  When the shutter button 27d is fully pressed, the CPU 7 drives the iris 2 based on the determined aperture value, controls the aperture diameter of the iris 2 to adjust the depth of field, and sets the determined shutter speed. Based on this, the charge accumulation time in the CCD 3 is controlled via the TG 4 (AE operation).

  The AE operation includes an aperture priority AE, a shutter speed priority AE, a program AE, etc. In any case, the subject brightness is measured, and an exposure value determined based on the photometric value of the subject brightness, that is, an aperture value and a shutter. By taking a picture in combination with the speed, control is performed so that an image is taken with an appropriate exposure amount and depth of field, and it is possible to save troublesome time for determining the exposure.

  The CPU 7 extracts image data corresponding to the focus detection range of the focus lens selected by the CPU 7 from the image processing circuit 6. The method of detecting the focus position of the focus lens is performed using the feature that the high frequency component of the image data has the maximum amplitude at the focus position (contrast AF).

  The CPU 7 drives and controls the focus motor 9 to sequentially calculate the amplitude value while moving the focus lens within the movable range, that is, from the end point on the infinity side (INF point) to the end point on the near side (NEAR point). And a command is issued to the focus motor 9 to move the focus lens to the in-focus position corresponding to when the maximum amplitude is detected. The focus motor 9 moves the focus lens to the in-focus position according to a command from the CPU 7 (AF operation). As will be described later, the contrast calculation unit 7b is a program that functions as means for controlling each block in order for the CPU 7 to perform the AF operation, and is recorded in the ROM 24.

  The CPU 7 is connected to the shutter button 27d, and this in-focus position is detected when the user presses the shutter button 27d halfway. Further, when the CPU 7 obtains a zoom command in the TELE direction or WIDE direction from the user by the zoom switch 27e, the zoom motor 10 is driven to move the zoom lens between the WIDE end and the TELE end. Let

  The flash control circuit 17 receives power supplied from the battery 29 in order to cause the flash light emitting unit 12 to emit light, charges a flash light emitting capacitor (not shown), and controls light emission of the flash light emitting unit 12.

  The camera 100 is provided with a media controller 22. The media controller 22 reads and compresses the image data stored in the RAM 25 and stores it in the memory card 23. Further, when reading the image data stored in the memory card 23, the media controller 22 extracts an identification number (ID) unique to the memory card 23, reads out and decompresses the image data stored in the memory card 23, Store in the RAM 25.

  The camera 100 includes a CPU 7, a ROM 24, and a display driver 18. The CPU 7 controls the entire camera 100. The ROM 24 stores solid data, programs and the like unique to the camera 100. The image processing circuit 6 converts the image data into RGB signals of three colors and outputs them to the display device 19 via the display driver 18. When the shooting mode is set, RGB signals are continuously output to the display device 19 and a through image is displayed.

  The battery 29 is loaded in a battery storage chamber (not shown) and is electrically connected to each circuit of the camera 100 via the power supply circuit 28.

  The image signal of the subject photographed by the camera 100 is output to an external device such as a personal computer via the I / F 26, and the image signal is input to the camera 100 from the external device via the I / F 26. Responsible for data communication with external devices.

  The GPS receiver 30 receives a radio wave signal including the satellite's orbit from the GPS satellite 300 and time data from an atomic clock mounted on the satellite.

  The wireless receiver 31 wirelessly receives a radio signal from the wireless transmitter 202. As a communication method adopted between the wireless transmitter 202 and the wireless receiver 31, various types such as optical wireless communication such as IrDA and wireless LAN are adopted. Note that the GPS receiver 30 and the wireless receiver 31 of the camera 100 can be externally connected via the I / F 26 without any problem, and are not necessarily built in the camera 100.

  The GPS receiver 30 calculates a relative distance difference from the plurality of GPS satellites 300 based on the time difference of the received radio waves, and obtains an intersection of hyperboloids that are the trajectories, thereby obtaining current position information (x2, y2) of the camera 100. , Z2). By capturing the radio waves of three satellites, the position on the plane on the earth can be determined (two-dimensional positioning), and by capturing the radio waves of four or more satellites, more advanced information can be obtained (three-dimensional positioning).

  The GPS receiver 201 obtains the current position information (x1, y1, z1) of the subject 200 in the same manner as the current position information calculation method of the camera 100 based on the radio signals received from the plurality of GPS satellites 300.

  As shown in FIG. 3, the CPU 7 calculates the distance L between the two based on the current position information (x1, y1, z1) of the subject 200 and the current position information (x2, y2, z2) of the camera 100. For simplicity of explanation, as shown in FIG. 4, it is assumed that z1 = z2 = 0 in the case of two-dimensional positioning. When the camera 100 and the subject 200 are both in a flat place such as the ground, z1 = z2 = 0 is substantially satisfied, and it is not necessary to employ the three-dimensional positioning. In this case, the two-dimensional positioning is sufficient. is there. The three-dimensional positioning may be used only when the camera 100 or the subject 200 is at a high place such as on the floor of a building and the altitudes of both are not negligible.

  FIG. 5 shows an example in which the GPS 201 and the wireless transmitter 202 are attached to the subject 200. In this figure, a GPS receiver 201 is attached to the wrist of the person subject 200, and a wireless transmitter 202 is attached to the pocket of the clothes of the person subject 200. Of course, this is only an example, and it is arbitrary where and which device is mounted.

  FIG. 6 shows a flow of shooting preparation processing executed by the CPU 7 of the camera 100. This process is executed before a shooting instruction (full pressing of the shutter button 27d) is performed, and starts according to the setting of the shooting mode, for example.

  In S1, the setting of subject identification information is accepted. The setting input source may be the information itself received from the wireless transmitter 202 or the information manually input from the operation unit 27.

  In S <b> 2, the subject identification information is received from the wireless transmitter 202 of the subject 200.

  In S3, it is determined whether or not the subject identification information received in S2 is the same as the subject identification information set in S1. If the subject identification information is the same, the process proceeds to S3. If not, the process returns to S2.

  In S4, the current position information (x1, y1, z1) of the subject 200 is continuously obtained from the wireless transmitter 202 of the subject 200.

  In S5, as described above, the current position information (x2, y2, z2) of the camera 100 is obtained based on the radio wave signal received by the GPS receiver 30.

  In S6, a distance L between the camera 100 and the subject 200 is calculated.

  In S7, an in-focus position corresponding to the distance L is obtained.

  In S8, the focus lens is moved to the in-focus position obtained in S7. Note that the calculation error of the distance L due to the GPS positioning error is absorbed by the depth of field (allowable range for focusing), and the subject 200 is focused even if there is an error in GPS positioning. After that, the image recording operation is performed when the shutter button 27d is fully pressed at an appropriate time.

  As described above, the distance between the camera 100 and the subject 200 is calculated based on the radio wave signal from the GPS satellite. Therefore, even if the subject 200 is difficult to see due to being crowded or the like, The focus lens can be moved to the in-focus position corresponding to the current position, and the subject 200 can be focused quickly and accurately. Further, since it is possible to focus without capturing the subject 200 within the angle of view of the camera 100, it is possible to move the lens in advance to a focus position and then capture the subject 200 at the angle of view. The overall shooting time can be shortened as compared with the case of performing contrast AF that needs to capture the subject 200 at the angle of view.

  Applications of this focusing method are various. For example, if a GPS receiver 201 and a wireless transmitter 202 are attached to a child at an athletic meet, the child is mixed with other children at a group performance of the athletic meet. But you can focus quickly and accurately.

Second Embodiment
FIG. 7 shows a camera system according to the second embodiment. The same blocks as those in the first embodiment are denoted by the same reference numerals. Here, plane position information (x1, y1) and (x2, y2) of the camera 100 and the subject 200 is obtained by two-dimensional positioning, and the altimeter 203 attached to the subject 200 and the altimeter 32 attached to the camera 100 are obtained. To detect the altitude z1 of the subject 200 and the altitude z2 of the camera 100, respectively. The wireless transmitter 202 wirelessly transmits to the camera 100 the altitude z1 of the subject 200 obtained by the altimeter 203 in addition to the subject identification information and position information (x1, x2).

  In this way, the wireless transmitter 202 is the same as the three-dimensional position information (x1, y1, z1) transmitted wirelessly.

  In addition, as the altimeter 32 and the altimeter 203, a pressure sensor as an altimeter / barometer adopted in a digital wristwatch can be used.

  FIG. 8 shows photographing preparation processing according to the second embodiment.

  S11 to S15 are the same as S1 to S5. However, in S14, the altitude z1 of the subject 200 obtained by the altimeter 203 is received in addition to the subject identification information and the position information (x1, x2).

  In S16, the altitude meter 32 detects the altitude z2 of the camera 100.

  In S17, the distance L is calculated based on the three-dimensional position information (x1, y1, z1) and (x2, y2, z2) composed of the plane position information and the altitude.

  S18 and S19 are the same as S7 and S8.

  That is, even when only two-dimensional positioning is possible, if the altitude is measured by the camera 100 and the subject 200, respectively, it is possible to focus on the subject 200 having a difference in altitude as in the first embodiment.

<Third Embodiment>
FIG. 9 shows a camera system according to the third embodiment. The same blocks as those in the other embodiments are denoted by the same reference numerals. The camera 100 is provided with a tilt sensor 33. The inclination sensor 33 is configured by a combination of, for example, a weight (dead weight) and a strain gauge.

  FIG. 8 shows photographing preparation processing according to the third embodiment.

  S21 to S25 are the same as S11 to S15. However, in S14, subject identification information and positioning signals (x1, x2) are received, and altitude z1 is not received.

  In S <b> 26, the inclination is detected by the inclination sensor 33, and this inclination is set as an elevation angle θ with respect to the subject 200 from the camera 100. In order for the inclination to be the elevation angle θ, the angle of view of the camera 100 must capture the subject 200 (see FIG. 10).

  In S27, the distance L is calculated based on the two-dimensional position (x1, y1), (x2, y2, z2) and the elevation angle obtained from the positioning signal and altitude (see FIG. 10).

  S28 and S29 are the same as S18 and S19.

  That is, even when only two-dimensional positioning is possible, if the elevation angle from the camera 100 to the subject 200 is measured, it is possible to focus on the subject 200 having an altitude difference as in the first embodiment.

<Fourth embodiment>
FIG. 12 shows a camera system according to the fourth embodiment. The same blocks as those in the other embodiments are denoted by the same reference numerals. The distance accuracy calculation unit 7a is a program for the CPU 7 to execute step S37 described later, and is recorded in the ROM 24. The contrast calculation unit 7b is a program that causes the CPU 7 to function as means for controlling each block in order to perform the AF operation, and is recorded in the ROM 24. The relative distance calculation unit 7c is a program for the CPU 7 to execute step S36 described later, and is recorded in the ROM 24.

  FIG. 13 shows a shooting preparation process according to the fourth embodiment.

  S31 to S36 are the same as S1 to S6.

  In S37, the distance L and the GPS positioning error s are compared to determine whether L> s. If L> s, the process proceeds to S38, and if L ≦ s, the process proceeds to S40. For example, in the case of differential GPS, the error s is about 10 cm in the horizontal direction and about 15 cm in the vertical direction. However, the error may vary depending on the business entity of the GPS service, and the surrounding environment (terrain, Depending on whether there are obstacles, weather, etc.), the error varies, and this high-precision positioning error is not always guaranteed.

  S38 and S39 are the same as S7 and S8.

  In S40, contrast AF is performed. Alternatively, distance measurement is performed by a distance measurement method having an error smaller than the GPS positioning error s, such as active distance measurement or passive distance measurement, and focusing is performed according to the distance to the subject obtained as a result of the distance measurement. May be performed.

  In this way, when the distance between the camera 100 and the subject 200 is smaller than the GPS positioning error, it can be properly focused by switching to the contrast AF or other focusing method, and a high-quality image without blur can be obtained. .

<Fifth Embodiment>
FIG. 14 shows a camera system according to the fifth embodiment. The same blocks as those in the other embodiments are denoted by the same reference numerals.

  The azimuth sensor 35 detects the azimuth α of the optical axis of the photographing lens housed in the lens barrel 1 of the camera 100 and outputs it to the CPU 7. As the azimuth sensor 35, for example, a known sensor such as an azimuth sensor that detects azimuth using geomagnetism or an azimuth sensor that detects an inclination angle by detecting an angular velocity around a predetermined axis using a gyro can be used. is there.

The subject direction calculation unit 7d calculates the orientation γ = tan ⁻¹ ((x1−x2) / (y1−y2)) of the subject 200 viewed from the camera 100 (see FIG. 15). The subject direction calculation unit 7f for the shooting angle of view calculates the subject direction β based on the azimuth α of the photographic lens optical axis and the azimuth γ of the subject 200 (see FIG. 15).

  The subject direction calculation unit 7d and the subject direction calculation unit 7f with respect to the shooting angle of view are programs executed by the CPU 7, and are recorded in the ROM 24.

  FIG. 16 shows photographing preparation processing according to the fourth embodiment.

  S51 to S54 are the same as S1 to S4.

In S54, the current position (x1, y1) of the subject and the current position (x2, y2) of the camera are acquired. Then, the direction γ = tan ⁻¹ ((x1−x2) / (y1−y2)) is calculated.

  In S55, the current direction α is detected by the direction sensor 35.

  In S56, the CPU 7 acquires the current direction α.

  In S57, the lens focal length information detector 7e detects the current focal length f of the focus lens.

  In S58, the CPU 7 acquires the current focal length f. Then, the CPU 7 specifies the angle of view Θ corresponding to the current focal length f from the angle of view-focal length table recorded in advance in the ROM 24. The angle-of-view distance table stores information defining the relationship between the lens focal length and the angle of view. For example, when the focal length f is 300 [mm] and 400 [mm], the corresponding angles of view Θ are 8.2 [degrees] and 6.2 [degrees], respectively. Further, the CPU 7 calculates the half angle of view θ from the angle of view Θ. That is, θ = Θ / 2.

  In S59, the subject direction β = γ−α with respect to the optical axis is calculated.

  In S60, based on the screen width W of the display device 19 and the direction β of the subject 200 with respect to the lens optical axis, the subject direction display position d = W / 2 × tan β / tan θ in the screen of the display device 19 is calculated (FIG. 15). reference). The position d indicates the distance from the center line in the screen to the subject 200 along the horizontal direction of the screen (see FIG. 17).

  In S61, a marker M indicating the position of the subject 200 is overlaid on the through image based on the subject direction display position d.

  For example, as shown in FIG. 17, a marker M is arranged at the top of the screen.

  The shape of the marker is arbitrary. For example, as shown in FIG. 18, an ellipse whose major axis is a parallel line l that is a distance d in the horizontal direction of the screen from the center line in the screen may be used as the marker M.

  When the subject 200 deviates from the angle of view, that is, when W / 2 <d, the marker N indicating that the subject 200 has deviated from the angle of view and the direction in which the subject 200 exists is overlaid. Also good. In this way, even when it is difficult to identify the subject 200 or when the subject 200 is lost, it is easy to know which one can capture the subject 200 by matching the angle of view.

  Note that S54 to S61 are repeated every predetermined time (for example, every 2 seconds) until the shutter button 27d is fully pressed. In this embodiment, the positions of the subject 200 and the camera 100 are assumed to be two-dimensional coordinates (x, y). However, if the altitude (see FIG. 3) and the elevation angle (see FIG. 10) of the subject are ignored, the same applies. Marker display is possible.

1 is a schematic configuration diagram of a camera system according to a first embodiment. Camera block diagram The figure which illustrates the three-dimensional positional relationship of a to-be-photographed object and a camera The figure which illustrates the two-dimensional positional relationship of a to-be-photographed object and a camera The figure which shows the example of mounting | wearing with a GPS receiver and a radio transmitter to a to-be-photographed object The flowchart which shows the flow of the imaging | photography preparation process which concerns on 1st Embodiment. Schematic configuration diagram of a camera system according to the second embodiment The flowchart which shows the flow of the imaging | photography preparation process which concerns on 2nd Embodiment. Schematic configuration diagram of a camera system according to the third embodiment The figure which illustrates the three-dimensional positional relationship of a to-be-photographed object and a camera The flowchart which shows the flow of the imaging | photography preparation process which concerns on 3rd Embodiment. Schematic configuration diagram of a camera system according to the fourth embodiment Flowchart showing the flow of shooting preparation processing according to the fourth embodiment Schematic configuration diagram of a camera system according to a fifth embodiment The figure which illustrates the two-dimensional positional relationship of a to-be-photographed object and the view angle of a camera The flowchart which shows the flow of the imaging | photography preparation process which concerns on 5th Embodiment. Display example of arrow marker Example of oval marker display Display example of out-of-view marker

Explanation of symbols

1: lens barrel, 2: iris mechanism, 3: CCD, 4: timing generator, 5: signal processing circuit, 6: image processing circuit, 7: CPU, 25: RAM, 31: wireless receiver, 201: GPS reception , 202: Wireless transmitter, 300: GPS satellite

Claims (7)

A subject position acquisition unit that is installed in the subject and acquires current position information of the subject based on a radio wave signal from a GPS satellite;
A transmission unit for transmitting the current position information of the subject acquired by the subject position acquisition unit;
A receiving unit for receiving the current position information of the subject transmitted from the transmitting unit;
An imaging device position acquisition unit that is installed in the imaging device and acquires current position information of the imaging device based on a radio wave signal from a GPS satellite;
A distance calculation unit that calculates a distance between the subject and the photographing device based on the current position information of the subject and the current position information of the photographing device;
An adjustment unit that adjusts the focus of the photographing lens of the photographing apparatus based on the distance calculated by the distance calculating unit;
A photographing system comprising: Further comprising an altitude difference detection unit for detecting an altitude difference with respect to the subject from the imaging device,
The distance calculation unit calculates a distance between the subject and the photographing device based on the current position information of the subject, the current position information of the photographing device, and the height difference detected by the height difference detection unit. The shooting system described in 1. A determination unit that determines whether the distance calculated by the distance calculation unit is less than a distance that causes a predetermined measurement error;
3. The photographing system according to claim 1, wherein when the distance is less than a distance that causes the predetermined measurement error, focus adjustment is performed by a focus adjustment unit that can ensure accuracy less than the contrast AF or the predetermined measurement error. An optical axis direction detector that detects the direction of the optical axis of the imaging lens of the imaging apparatus;
An angle-of-view detection unit for detecting an angle of view of the photographing apparatus;
Based on the current position information of the subject, the current position information of the photographing device, the direction of the optical axis of the photographing lens of the detected photographing device, and the detected angle of view of the photographing device, the display device of the photographing device A subject display position calculation unit for calculating a display position of the subject in the displayed through image;
Based on the calculated display position of the subject, a display control unit that superimposes and displays a marker indicating the display position of the subject on the through image;
The imaging system according to claim 1, further comprising: A photographing unit for photographing a subject image received through the photographing lens;
A receiving unit that receives current position information of a subject based on a radio wave signal from a GPS satellite;
An imaging device position acquisition unit that acquires current position information of the imaging device based on radio signals from GPS satellites;
A distance calculation unit that calculates a distance between the subject and the photographing device based on the current position information of the subject and the current position information of the photographing device;
An adjusting unit that adjusts the focus of the photographing lens based on the distance calculated by the distance calculating unit;
An imaging device comprising: Receiving current position information of a subject based on a radio wave signal from a GPS satellite;
Acquiring current position information of the imaging device based on radio signals from GPS satellites;
Calculating a distance between the subject and the imaging device based on the current location information of the subject and the current location information of the imaging device;
Adjusting the focus of the photographic lens based on the calculated distance;
Including shooting method.   The program which makes a computer perform the imaging | photography method of Claim 6.

Images