JP2014007619A - Photograph support device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give highly versatile and objective photograph support information.SOLUTION: A photograph recommendation mark 35 is displayed at a liquid crystal display part 3 with a color different from that of a current position mark 33, so as to indicate the distance and position when a subject falls within a photograph region. The photograph recommendation mark 35 is not based on the subjective judgment of other photographer, but indicates the distance and position when a subject falls within a photograph region, which are an objective fact calculated. Consequently, highly versatile and objective photograph support information can be given, and useful photograph support can be carried out for many photographers.

Description

  The present invention relates to supporting shooting.

  Conventionally, as disclosed in Patent Document 1, a technique for supporting photographing is known. This technology includes a server and a camera that can communicate with the server. The server stores shooting objects shot by a plurality of photographers and shooting points when the shooting objects are shot. On the other hand, the camera includes an acquisition unit that acquires current location information, and transmits the current location information acquired by the acquisition unit to the server. Then, shooting support information including a shooting target that can be shot from the vicinity of the current location indicated by the received current location information and a suitable shooting point for shooting the shooting target is transmitted to the camera. The camera that has received the information displays the shooting support information on the display unit, and the photographer can take a picture from a position that is a suitable shooting point with reference to the information.

JP 2005-5398 A

  However, the shooting point presented as shooting support in the prior art is a suitable shooting point based on the subjective judgment of the photographer who uploaded the shooting point. Therefore, even if the photographer is a suitable shooting point, it is not always a suitable shooting point for other photographers. That is, since the shooting point that is the shooting support information is subjective information and has no objectivity, the shooting support information has low versatility and is not useful shooting support information for many photographers.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a shooting support apparatus and program capable of providing shooting support information that is objective and highly versatile. .

  In order to solve the problem, an imaging support apparatus according to the present invention includes a subject information acquisition unit that acquires information about the size of a subject, and an angle-of-view information acquisition unit that acquires information about an angle of view of an optical system that forms an image of the subject. And calculating means for calculating a suitable position or an inappropriate position for photographing the subject imaged by the optical system based on the information obtained by the both information obtaining means.

  Alternatively, subject information acquisition means for acquiring information on the position and size of the subject, current position acquisition means for acquiring the current position, and information acquired by both information acquisition means, the current position An optical system for calculating an angle of view of an optical system suitable for imaging a subject and an optical system for specifying an optical system based on the angle of view calculated by the calculation means from a plurality of types of interchangeable optical systems It is characterized by comprising specifying means and output means for outputting information indicating the optical system specified by the optical system specifying means.

  In addition, the imaging support program according to the present invention uses a computer included in the apparatus to capture information about the angle of view of a subject information acquisition unit that acquires information about the size of the subject and an optical system that forms an image of the subject. An angle information acquisition unit and a calculation unit for calculating a position suitable for photographing a subject imaged by the optical system based on information acquired by the both information acquisition units. And

  Alternatively, the computer included in the apparatus includes subject information acquisition means for acquiring information on the position and size of the subject, and current position acquisition means for acquiring the current position.

  Based on information acquired by the information acquisition means, a calculation means for calculating an angle of view of an optical system suitable for imaging the subject from the current position and a plurality of types of interchangeable optical systems And an optical system specifying unit that specifies an optical system based on the angle of view calculated by the calculating unit, and an output unit that outputs information indicating the optical system specified by the optical system specifying unit. .

  In addition, the imaging support method according to the present invention includes a subject information acquisition step for acquiring information about the size of a subject, an angle-of-view information acquisition step for acquiring information about an angle of view of an optical system that forms an image of the subject, And a calculation step of calculating a suitable position or an inappropriate position for photographing the subject imaged by the optical system based on the information acquired by the both information acquisition steps.

  Alternatively, based on the information acquired by the subject information acquisition step of acquiring information on the position and size of the subject, the current position acquisition step of acquiring the current position, and the information acquisition step, the current position A calculation step for calculating an angle of view of an optical system suitable for imaging a subject and an optical system for specifying an optical system based on the angle of view calculated by the calculation step from a plurality of types of interchangeable optical systems And an output step of outputting information indicating the optical system specified by the optical system specifying step.

  According to the present invention, imaging support information that is objective and highly versatile can be provided, and imaging support useful for a large number of photographers can be provided.

It is a block diagram which shows the outline of the hardware constitutions of the digital camera common to each embodiment of this invention. It is a memory block diagram of flash memory. It is a flowchart which shows the process sequence in 1st Embodiment. It is a figure which shows the example of a display in the embodiment. It is explanatory drawing which shows the calculation method of height H 'of imaging | photography area | region. It is explanatory drawing which shows the calculation method of width W 'of imaging | photography area | region. It is explanatory drawing which shows the calculation method of inclination (beta) with respect to the photographer of a to-be-photographed object. It is explanatory drawing which shows the calculation method of distance Lx when a to-be-photographed object fits in an imaging | photography area | region. It is explanatory drawing which shows the calculation method of distance Ly when a to-be-photographed object fits in an imaging | photography area | region. It is a flowchart which shows the process sequence in the modification of 1st Embodiment. It is explanatory drawing which shows the calculation method of lens view angle (theta) x (up-down direction) when a to-be-photographed object falls within an imaging | photography area | region. It is explanatory drawing which shows the calculation method of lens view angle | corner (theta) y when a to-be-photographed object fits in an imaging region. It is a figure which shows the example of a display in a modification. (A) is a flowchart showing a processing procedure in the second embodiment of the present invention, and (B) is a flowchart showing a procedure for calculating a photographing spot. It is a figure which shows the virtual rectangular parallelepiped. It is explanatory drawing of a horizontal angle of view. It is a flowchart which shows the calculation procedure using a vertical angle of view. It is explanatory drawing of the calculation using a vertical angle of view. It is a figure which shows the area | region where the distance from a rectangular parallelepiped becomes L1. It is a flowchart which shows the calculation procedure of the imaging | photography limit line using a vertical angle of view. It is a flowchart which shows the calculation procedure of the imaging | photography limit line using a horizontal angle of view. It is a figure which shows imaging | photography possible limit distance L2-1. It is a figure which shows L2-3 for the photography possible limit distance. It is a figure which shows the area | region where the distance from a rectangular parallelepiped becomes L2-1 or L2-3. (A) is a flowchart showing a procedure for calculating a photographing limit line, and (B) is a flowchart showing a procedure for calculating corresponding coordinates on the circles D, E, and F. It is a flowchart which shows the calculation procedure of a comprehensive imaging | photography area. It is a figure which shows the example of a display in 2nd Embodiment. It is a figure which shows photographing limit distance L2-2.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an outline of the hardware configuration of a digital camera 1 common to the embodiments of the present invention.

  The digital camera 1 has a configuration in which the entire system is controlled by a CPU (Central Processing Unit) 10. The lens block 11 includes an interchangeable lens 2 that has a focus lens and a zoom lens and forms an optical system, and a mechanism such as a sensor that detects the type of the interchangeable lens 2. As the interchangeable lens 2, an 8 mm lens, a 12-24 mm lens, a 70-300 mm lens, and a 500 mm lens that are detachable from the main body of the digital camera 1 are prepared, and any of these lenses is attached. Furthermore, an actuator 12 such as a motor for driving a focus lens and a zoom lens included in the interchangeable lens 2 is provided, and a driver block 13 including various drivers for driving the actuator 12 is provided via a bus 24. It is connected to the CPU 10.

  The digital camera 1 also has a CCD (Charge Coupled Device) 14 as a solid-state imaging device for imaging a subject. The CCD 14 is a known charge transfer type solid-state imaging device. The driver 15 generates a CCD drive signal in accordance with a vertical CCD drive timing signal, a horizontal CCD drive timing signal, and an electronic shutter timing signal generated by a TG (Timing Generator) 16 and supplies the generated CCD drive signal to the CCD 14. Then, the CCD 14 is driven.

  The TG 16 generates a drive timing signal including the above-described vertical CCD drive timing signal, horizontal CCD drive timing signal, and electronic shutter timing signal in accordance with the drive mode set by the CPU 10. That is, the TG 16 has a register for storing a set value indicating the type of drive mode of the CCD 14. When the set value is set by the CPU 10, the TG 16 generates a drive timing signal (vertical CCD drive timing signal, horizontal CCD drive timing signal, electronic shutter timing signal) corresponding to each drive mode.

  The CCD 14 is driven by a driver 15 to photoelectrically convert an optical image (subject image) of a subject formed in the optical system of the lens block 11, thereby converting an analog imaging signal representing the subject image into a unit circuit 17. To supply.

  The unit circuit 17 includes a CDS (Correllated Double Sampling) circuit, an AGC (Auto Gain Control) circuit, and an A / D (analogue / digital) converter. The CDS circuit removes noise included in the analog imaging signal supplied from the CCD 14 by correlated double sampling. The AGC circuit amplifies the image signal after noise removal, and supplies the amplified image signal to the A / D converter. The A / D converter converts the amplified image signal into a digital image signal, and outputs the converted digital image signal to a DSP (Digital Signal Processor) 18.

  The DSP 18 performs processing such as pedestal clamping on the input imaging signal to convert it into RGB data, and further converts the RGB data into image data composed of a luminance (Y) component and a color difference (UV) component. Further, the DSP 18 performs digital signal processing for improving image quality such as auto white balance, contour enhancement, pixel interpolation, and the like on the image data, and sequentially stores them in the SDRAM 19.

  In the shooting mode, every time image data for one frame (one screen) is stored in the SDRAM 19, the image data is sent to the liquid crystal display unit 3 and displayed as a live view image. At the time of shooting when the shutter key is pressed, the CPU 10 compresses the image data temporarily stored in the SDRAM 19 and records it in the external memory 20 as an image file of a predetermined format. The external memory 20 is a detachable memory card connected to the camera body via a card interface (not shown).

  In the playback mode, the CPU 10 reads the image file recorded in the external memory 20 in accordance with the user's selection operation. Further, the CPU 10 expands the read image file, expands the image data in the SDRAM 19, and displays the image data on the liquid crystal display unit 3.

  Further, a key input unit 22 is connected to the CPU 10, and a GPS (Global Positioning System) module 23 is connected to the CPU 10. The key input unit 22 includes various keys and buttons such as a shutter key, a cursor key, and an enter key, and other switches. The CPU 10 regularly scans the operation state of the switches in the key input unit 22 and acquires an operation signal corresponding to the content of the switch operation by the user.

  The GPS module 23 receives and demodulates and decodes the L1 band (1.57542 GHz) C / A code (Coarse / Acquisition code), and sequentially calculates the latitude and longitude of the current position, which is the current position of the digital camera 1. That is, the GPS module 23 acquires current position data that is data indicating the calculated latitude and longitude, and the current position data acquired sequentially is taken into the CPU 10.

  As shown in FIG. 2, the flash memory 21 is a memory in which a plurality of types of programs for causing the CPU 10 to control a plurality of types of data and the entire camera are stored. That is, the flash memory 21 is provided with a map storage area 211, a subject position / size storage area 212, a lens angle-of-view information storage area 213, a photographer's height storage area 214, and other storage areas 215. .

  In the map storage area 211, map image data for displaying a map having a predetermined standard size (predetermined scale) is stored, and scenic spot data indicating an area previously determined as a scenic spot corresponds to the map data. And remembered. In the storage area 212 such as the position / size of the subject, position information (position coordinates xn, yn) on the map corresponding to the subject to be photographed in the scenic spot, the latitude / longitude of the subject, for each scenic spot, Size information indicating each size of the thickness (depth, D), width (W), and height (H) is stored. Further, the subject position / size storage area 212 stores the subject direction (θn). The direction (θn) of the subject is stored as an angle (θn) with respect to the north-south axis Z of the virtual center line Zn crossing the subject 32, as shown in FIG.

In the lens angle-of-view information storage area 213, when the zoom magnification of the aforementioned 8 mm lens, 12-24 mm lens,... Prepared as the interchangeable lens 2 in the digital camera 1 is minimized, that is, the widest angle is set. Each lens angle of view (θ) is stored. The photographer's height storage area 214 stores the photographer's height (h) of the digital camera 1 input in advance by the user.
In the present embodiment, each lens field angle (θ) when the zoom magnification is minimized is stored in the lens field angle information storage area 213, but the zoom magnification is a median value. Alternatively, each lens angle of view (θ) when the zoom magnification is maximum may be stored.

  In the other storage area 215, an AF (auto (automatic control)) that automatically controls the program according to the present embodiment shown in the flowchart described later and the optical system of the lens block 11 to a focus position where the subject is focused by a known contrast detection method. Various programs such as an AF control program for performing (focus) control and other programs used for image reproduction are stored.

(First embodiment)
Next, the operation of the first embodiment of the present invention will be described with reference to the flowchart of FIG. For example, when a specific mode in the shooting mode called “scenery shooting mode” is set (step S101; YES), the CPU 10 starts the processing after step S102 shown in this flowchart.

  First, peripheral scenic spot data is displayed on the liquid crystal display unit 3 (step S102). In the process of step S102, the current position of the digital camera 1 is acquired by the GPS module 23, and scenic spot data indicating the scenic spot closest to the current position or the scenic spot to which the current position belongs is obtained from the map storage area 211. Based on this scenic spot data, a map of the scenic spot (surrounding scenic spot) is displayed on the liquid crystal display unit 3.

  As a result, as shown in FIG. 4, a map 31 of surrounding scenic spots is displayed on the liquid crystal display unit 3. Further, the scenic spot map 31 displayed on the liquid crystal display unit 3 includes a subject 32 (Tokyo Sky Tree in this example) that belongs to the scenic spot and is to be photographed. At this time, a current position mark 33 and a cursor 34 indicating the current position are displayed in the map 31 as shown in the figure.

  Next, the subject is selected by moving and surrounding the cursor 34 in accordance with the operation of the cursor key at the key input unit 22 by the user (step S103). In the example of FIG. 4, “Tokyo Sky Tree” is surrounded by the cursor 34 and is selected as the subject 32. Subsequently, “position information (position coordinates xn, yn)” and “size information (thickness, width, height, direction)” of the selected subject 32 are acquired (step S104).

  That is, as described above, the subject position / size storage area 212 has a thickness (D), a width (W), and a height (H) of a subject to be photographed belonging to the scenic spot for each scenic spot. Since the size information indicating each size and the direction (θn) of the subject are stored, the thickness, width, height, and direction are read out. Similarly, position information indicating the latitude and longitude of the subject stored is acquired.

  Subsequently, the type of the interchangeable lens currently mounted on the digital camera 1 is detected by a sensor provided in the lens block 11, and the lens image corresponding to the type of the interchangeable lens detected from the lens angle-of-view information storage area 213 is detected. The angle (θ) is read out and acquired as the current camera angle of view (step S105). Furthermore, the height (h) of the photographer stored in advance in the photographer's height storage area 214 is acquired by reading (step S106). Further, the current position information acquired by the GPS module 23 is acquired as the current position coordinates (xm, ym) of the photographer (digital camera 1) on the map (step S107).

  Thereafter, the height H ′ of the photographing region, the width W ′ of the photographing region, and the like are calculated from the acquired current position / height of the photographer, the position / size of the subject, and the lens angle of view (step S108).

  FIG. 5 is an explanatory diagram showing a method for calculating the height H ′ of the imaging region in step S108.

The symbols in the figure mean the following items and are values already acquired in the described steps.
H: Subject height (obtained in step S104)
L: Distance between the photographer and the subject (calculated from the position of the subject acquired in step S104 and the current position information acquired in step S107)
h: Photographer's height (obtained in step S106)
θ: angle of view of the camera (obtained in step S105)
H ': Height of the shooting area

When the distance from the ground to the camera is approximated with h, the angle α in the figure is
α = tan-1 (H / L): const (1)
From Equation (1)
H ′ = h + L · tan (θ−α) (2)
The conditions for the subject to fall within the camera angle of view are:
H <H '(3)
It is.
In order to keep the subject clean and clear,
H <H ′ · γ (γ <1) (4)
(Where γ is a value input by the user or a fixed value stored in advance).

FIG. 6 is an explanatory diagram showing a method for calculating the width W ′ of the imaging region in step S108.
The symbols in the figure mean the following items and are values already acquired in the described steps.
W: Width of subject (obtained in step S104)
D: Subject thickness (obtained in step S104)
L: Distance between the photographer and the subject (calculated from the position of the subject acquired in step S104 and the current position information acquired in step S107)
θ: angle of view of the camera (obtained in step S105)
β: inclination of the subject relative to the photographer (details will be described later with reference to FIG. 7)
W ′: the width of the photographing area (however, the object is assumed to approximate the outer shape of a rectangle).

From the figure
W ′ = 2L · tan (θ / 2) (5)
W ″ in the figure, that is, the apparent width W ″ when viewed from the shooting direction,
W ″ = W · cos (β) + D · sin (β) (6)
It becomes.
The conditions for the subject to fall within the camera angle of view are:
W ″ <W ′ (7),
It is.
In order to keep the subject clean and clear,
W ″ <W ′ · σ (σ <1) (8)
(Where σ is a value input by the user or a fixed value stored in advance).

FIG. 7 is an explanatory diagram showing a method of calculating the inclination β with respect to the photographer of the subject.
The symbols in the figure mean the following items and are values already acquired in the described steps.
β: inclination Xn with respect to the photographer of the subject, Yn: position coordinates of the subject (obtained in step S104)
θn: direction of subject (obtained in step S104)
xm, ym: position coordinates of the photographer (obtained in step S107)

Geometrically from FIG.
B = θn + θm
Also,

therefore,

  Next, it is determined whether or not the subject is within the shooting area of the digital camera 1 at the local point (step S109). Specifically, it is determined whether “H <H ′ and W ′ <W ″” using H, H ′, W ′, and W ″ calculated in step S108.

  As a result of this determination, if “H <H ′ and W ′ <W ″” and the subject is within the shooting area of the digital camera 1 at the local point, the CPU 10 controls the actuator 12 to control the lens block. 11 starts driving the focus lens and zoom lens in the lens 11 (step S110). Then, the lens drive is stopped at an optimum zoom magnification (for example, a zoom magnification that allows the subject to be within the photographing area with the maximum size) (step S111). Thereafter, the process returns to step S101, and the processes in steps S102 to S113 described above are repeatedly executed until the setting of the “scenery shooting mode” is canceled by a user operation.

  Accordingly, when the photographer presses the shutter key in this state, the CPU 10 compresses the image data temporarily stored in the SDRAM 19 and records it in the external memory 20 as an image file of a predetermined format. As a result, a photographed image including the entire subject 32 can be recorded in the external memory 20 without any loss in the thickness, width, and height directions.

  On the other hand, if the determination in step S109 is no, the process proceeds from step S109 to step S112. Then, the distances Lx and Ly when the subject is within the shooting area are calculated from the position / size of the subject and the lens angle of view, and processing for selecting the longer distance after the calculation is performed.

FIG. 8 is an explanatory diagram illustrating a method of calculating the distance Lx when the subject is within the shooting area in step S112.
The symbols in the figure mean the following items and are values already acquired in the described steps.
H: Subject height (obtained in step S104)
Lx: Distance from the subject to the optimum shooting point (the point where the determination in step S109 is YES) h: Height of the photographer (obtained in step S106)
θ: angle of view of the camera (obtained in step S105)
H ′: the height of the shooting area δ: the subject ratio to the shooting area αx: the angle formed by the horizon and the lower edge of the shooting area The height of the shooting area at the optimal composition is H ′,
H ′ = H × γ (9)
Lx satisfying equation (9) is calculated.
H ′ = h + Lx · tan (θ−αx) (11)
From the additive theorem,
tan (θ−αx) = (tanθ−tanαx) / (1 + tanθtanαx) (12)
From tanαx = h / Lx,
H ′ = h + Lx · (tan θ−h / Lx) / (1 + tan θ · h / Lx) (13)
When formulas (11) and (12) are arranged for Lx,
tan θLx2− (h + H ′) Lx−h · H ′ · tanθ = 0 (14)
If Lx is derived from the solution formula,

  That is, the distance Lx when the subject is within the shooting area in step S112 can be calculated by Expression (15).

FIG. 9 is an explanatory diagram illustrating a method of calculating the distance Ly when the subject is within the shooting area in step S112.
The symbols in the figure mean the following items and are values already acquired in the described steps.
W: Width of subject (obtained in step S104)
D: Subject thickness (obtained in step S104)
θ: angle of view of the camera (obtained in step S105)
β: Inclination of the subject relative to the photographer (calculated from the direction of the subject acquired in step S104 and the position coordinate (xm, ym) of the photographer acquired in step S107)
W ′: the width of the photographing area (however, the object is assumed to approximate the outer shape of a rectangle).
δ: Subject ratio relative to the picture area

Let W 'be the shooting area for optimal composition,
W ″ = W ′ · δ (16)
When calculating Ly that satisfies the above equation (16),
W ′ = 2Ly · tan (θ / 2) (17)
W ″ = w · cos (β) + t · sin (β) (18)

  When the distances Lx and Ly are calculated as described above, the longer distance is selected. After that, the distance and position when the subject is within the shooting area are displayed on the liquid crystal display unit 3 (step S113). Thereafter, the process returns to step S101, and the processes in steps S102 to S113 described above are repeatedly executed until the setting of the “scenery shooting mode” is canceled by a user operation.

  That is, as illustrated in FIG. 4, the shooting recommended position mark 35 is displayed on the liquid crystal display unit 3 in a color different from the current position mark 33, and the distance when the subject is within the shooting area by the shooting recommended position mark 35. Indicate the position. The recommended shooting position mark 35 is not based on the subjective judgment of another photographer, but indicates the distance and position when the subject is within the shooting area, which is the objective fact calculated as described above. . Accordingly, it is possible to provide shooting support information that is objective and highly versatile, and can provide shooting support useful for many photographers.

  Further, a recommended shooting distance comment field 37 is provided in a part of the liquid crystal display unit 3, and a specific instruction such as “Please lower OOm” is displayed in this field 37. Accordingly, when the photographer acts in accordance with the instruction displayed in the recommended shooting distance comment field 37, an image in which the subject is entirely contained can be easily taken.

  In the embodiment, the position where the entire subject is within one image is set as a suitable position for shooting. However, the present invention is not limited to this, and the position where a part of the characteristic part of the subject is set is preferable for shooting. A position where the characteristic background portion as well as the entire subject is included may be a position suitable for photographing.

  In the former case, when assuming a rectangular parallelepiped 321 comprising a width W, a height H, and a depth D surrounding the subject 32 (not shown) shown in FIG. 15, the width W, the height H, and the depth D are assumed. By reducing each value to form a rectangular parallelepiped smaller than the subject, and performing the same processing as described above, a position where a part of the characteristic part of the subject falls can be calculated as a suitable position for photographing. In the latter case, each of the width W, the height H, and the depth D is increased to form a rectangular parallelepiped larger than the subject, and by performing the same processing as described above, not only the entire subject but also the characteristic background It is possible to calculate a position where the portion is also included as a position suitable for photographing.

(Modification of the first embodiment)
FIG. 10 is a flowchart showing a processing procedure in a modification of the present embodiment. In this flowchart, steps S201 to S211 excluding steps S212 and S213 are the same processes as steps S201 to S211 in the flowchart shown in FIG.

  If the result of determination in step S209 is that the subject does not fit within the shooting area, the lens angle of view when the subject fits within the shooting area from the current position of the photographer, the position / size of the subject, and the lens angle of view. θx and θy are calculated, and after calculation, the longer distance is selected (step S212).

FIG. 11 is an explanatory diagram illustrating a method of calculating the lens angle of view θx (vertical direction) when the subject is within the shooting region in step S112.
The symbols in the figure mean the following items and are values already acquired in the described steps.
H: Subject height (obtained in step S204)
L: Distance between the photographer and the subject (calculated from the position of the subject acquired in step S204 and the current position information acquired in step S207)
h: Photographer's height (obtained in step S206)
θx: Optimal camera angle of view (vertical direction)
H ′: height of the shooting area δ: ratio of subject to the shooting area

And
tan θx = (L (h + H · δ)) / (L2−h · H · δ) (20)
Therefore,
θx = tan−1 ((L (h + H · δ)) / (Lh · H · δ) (21)

FIG. 12 is an explanatory diagram illustrating a method of calculating the lens angle of view θy when the subject is within the shooting area in step S212.
The symbols in the figure mean the following items and are values already acquired in the described steps.
W: Width of subject (obtained in step S204)
D: Thickness of the subject (obtained in step S204)
L: Distance between the photographer and the subject (calculated from the position of the subject acquired in step S204 and the current position information acquired in step S207)
θy: Optimum angle of view of the camera (horizontal direction)
β: Inclination of the subject relative to the photographer (calculated from the direction of the subject acquired in step S204 and the position coordinate (x m, ym) of the photographer acquired in step S207)
W ′: the width of the photographing area (however, the object is assumed to approximate the outer shape of a rectangle).
δ: Subject ratio relative to shooting area

Let W 'be the shooting area for optimal composition,
W ″ = W ′ · δ (22)
When θy satisfying the above equation (22) is calculated,
W ′ = 2L · tan (θy / 2) (23)
W ″ = w · cos (β) + t · sin (β) (24)

  If the lens angle of view θx, θy is calculated as described above, the one with the larger angle of view is selected. Thereafter, the lens and the angle of view when the subject is within the shooting area are displayed on the liquid crystal display unit 3 (step S213).

  That is, as illustrated in FIG. 13, the screen of the liquid crystal display unit 3 is divided into a through image area 38, a recommended lens / view angle display area 39, and a lens lineup display area 40. While the through image 42 including the subject 32 is continuously displayed in the through image area 38, the lens angle of view θx calculated in step S212 in the plurality of types of interchangeable lenses is displayed in the recommended lens / view angle display area 39. , Θy is an interchangeable lens having a lens field angle equal to or larger than the larger lens field angle (hereinafter referred to as a recommended lens field angle), and the type of the interchangeable lens having a lens field angle closest to the recommended lens field angle is displayed .

  Therefore, as shown in FIG. 13, in the recommended lens / view angle display area 39, for example, the 8 mm interchangeable lens 2 is displayed. Accordingly, it is understood that the photographer only needs to use the 8 mm interchangeable lens 2 if photographing is performed so that the subject 32 is accommodated from this point. Therefore, by taking a picture by exchanging the lenses according to this display, it is possible to take an image in which the entire subject is within one image at the spot without changing the shooting spot.

  In FIG. 3, “distance / position” is displayed, but “distance / position” may be displayed simultaneously with “lens / field angle”. Further, although “lens / viewing angle” is displayed in step S213 in FIG. 10, “distance / position” may be displayed simultaneously with displaying “lens / viewing angle”. In addition, instead of displaying simultaneously, only “Lens / Angle” is displayed in the range that can be handled by exchanging lenses, and when it becomes impossible to deal with exchanging lenses, the display is switched to “Distance / Position”. May be.

(Second Embodiment)
FIG. 14 and subsequent figures show a second embodiment of the present invention, in which a non-photographable area in which it is impossible to photograph the entire subject to be photographed in the scenic spot is displayed. Is. When a specific mode in the shooting mode, referred to as “non-shootable area search mode”, is set by the user's operation on the key input unit 22, the CPU 10 starts processing according to the flowchart shown in FIG. .

  That is, the non-photographable area search mode is activated (step SA1), and a user's desired subject is selected according to the user's operation at the key input unit 22 (step SA2). Next, necessary information such as the size of the subject is acquired from the storage area 212 such as the position and size of the subject in the flash memory 21 (step SA3). Then, using the acquired size of the subject, a minimum rectangular parallelepiped surrounding the subject is formed, and this rectangular parallelepiped is replaced with the subject (step SA4).

That is, as shown in FIG. 15, a rectangular parallelepiped 321 composed of a width W, a height H, and a depth D surrounding a subject 32 (not shown) is assumed. Note that the width, height, and depth of the rectangular parallelepiped are equal to the width W, height H, and depth D of the subject 32. Therefore, in the following description, the width, height, and depth of the subject 32 and the rectangular parallelepiped 321 are denoted by the same reference numeral, width W, height H, and depth D.
Further, this rectangular parallelepiped 321 is arranged in three-dimensional coordinates having x, y, and z axes, and the center of the bottom surface is set as the origin (0).

  Thereafter, a non-photographable area is calculated (step SA5), a map including the subject is displayed on the liquid crystal display unit 3, and an unphotographable area is displayed on the map (step SA6).

  As shown in the flowchart of FIG. 14B, the non-shootable area is calculated using a vertical angle of view (step SB1), a calculation using a horizontal angle of view (step SB2), and a comprehensive shooting area. (Step SB3) is executed.

Here, the vertical field angle used in step SB1 and the horizontal field angle used in step SB2 will be described with reference to FIG. In the digital camera 1 according to the present embodiment, as shown in FIG. 1, the CCD 14 is used as an image sensor. Then, as shown in FIG. 16, the horizontal image size, which is the horizontal size of the CCD, is “x”, and the vertical image size, which is the vertical size, is “y”. The focal length of the interchangeable lens 2 is “f”. Then, the vertical angle of view θ1, which is the angle of view in the vertical direction, can be calculated by the following equation (27).
Method for calculating vertical angle of view θ1

Further, the horizontal angle of view θ2 that is the angle of view in the horizontal direction can be calculated by the following equation (28).
Calculation method of horizontal angle of view θ2

  FIG. 17 is a flowchart showing details of the calculation using the vertical angle of view (step SB1). In step SC1 of this flowchart, as shown in FIG. 18, when the camera (digital camera 1) is at a height of 0 m, the photographing possible limit distance (in order to capture the entire subject, the subject must be at a minimum distance from the subject). Distance) is L1. Then, an imaging limit line is calculated from the vertical angle of view and the height of the subject 32 (the height of the rectangular parallelepiped 321 replaced with the subject 32) (step SC2).

FIG. 18 is a diagram showing a method of calculating the photographic possible limit distance L1 executed in step SC1. In this figure, the vertical angle of view θ1 is calculated by the equation (27). Further, the height H of the subject is acquired and known at step SA3. Therefore,
From tan θ1 = H / L1, L1 = H / tan θ1
It becomes.

  Then, an area is assumed in which the distance from the rectangular parallelepiped 321 is L1 regardless of where the object 32 is replaced by 360 ° around the rectangular parallelepiped 321. Then, as shown in FIG. 19, a region surrounded by a thick line is a region where the distance from the rectangular parallelepiped 321 is L1, and this region is not suitable for vertical photographing that cannot photograph the entire subject 32 in the vertical direction. It becomes a possible area.

  Further, since the rectangular parallelepiped 321 in which the subject is replaced in Step SA4 is the origin object, attention is paid only to the first quadrant. Then, in the first quadrant, the vertical imaging impossible area can be divided into areas A, B, and C. Then, coordinates on the photographing limit lines AL, BL, and CL indicated by bold lines are obtained for each of the areas A, B, and C.

The coordinates of these areas A, B, and C on the thick lines AL, BL, and CL are obtained as follows.
(1) When the coordinate calculation method 0 <x <W / 2 on the photographing limit line AL in the area A, the coordinates (x, z) are represented by (x, ((D / 2) + L1)).
(2) When the coordinate calculation method W / 2 ≦ x <(W / 2) + L1) on the photographing limit line BL in the area B, the coordinates on the circumference of the center (W / 2, D / 2) and the radius L1 (X, z).
(3) When the coordinate calculation method W / 2 ≦ x <(W / 2) + L1) on the photographing limit line CL of the area C, and 0 <z <(D / 2) + L1), the x coordinate is ( W / 2) + L1 coordinates (x, z).

  Then, the calculation of the photographing limit line in step SC2 is executed according to the photographing limit line calculation flowchart using the vertical angle of view shown in FIG. That is, an initial value “0” is set to the variable x (step SD1). Since the variable x is counted up in step SD8, it is determined whether or not the value of x to be counted up is “x <(W / 2) + L1” (step SD2). If this determination is NO, the subsequent processing is complete, and the calculation of the photographing limit line using this vertical field angle is terminated.

  If the value of x is “x <(W / 2) + L1”, it is further determined whether or not the value of x is “0 <x <W / 2” (step SD3). If this determination is YES, the coordinate calculation method on the imaging limit line AL in the area (A) described above is applied, and the coordinates (x, x) of the imaging limit line from x = 0 to x = W / 2 are applied. z) is calculated (step SD4). As a result, the coordinates of the photographing limit line AL in the area A are calculated.

  As a result of the determination in step SD3, when the value of x is not “0 <x <W / 2” but x = (W / 2) + α, the process proceeds from step SD3 to step SD5. In step SD5, it is determined whether or not the value of z calculated last in step SD4 or the value of z calculated in step SD6 is “0 <z <(D / 2 + L1)”. (Step SD5). If it is in the state of “0 <z <(D / 2 + L1)”, the coordinate calculation method on the imaging limit line BL of (2) area B described above is applied, and z = (D / 2) to z = The coordinates (x, z) of the photographing limit line up to (D / 2) + L1 are calculated (step SD6). As a result, the coordinates of the photographing limit line BL in the region B are calculated.

  Further, when all the coordinates of the photographing limit line BL are calculated in step SD6, z = (D / 2) + L1. Therefore, the determination in step SD5 is NO, and the process proceeds from step SD5 to step SD7. Then, by applying the above-described (3) coordinate calculation method on the imaging limit line CL of the region C, z = 0 to z = (D / 2) and x = (W / 2) + L1. The coordinates (x, z) of the photographing limit line CL are calculated. As a result, the coordinates of the photographing limit line CL of the area C are calculated.

  With the above processing, a plurality of coordinates (x, z) indicating the photographing limit lines AL, BL, and CL in the first quadrant are calculated, and the other second, third, and fourth quadrants depend on the quadrant. If the sign of x and z is switched, a series of coordinates indicating the photographing limit line PL1 surrounding the rectangular parallelepiped 321 shown in FIG. 19 is obtained.

  FIG. 21 is a flowchart showing details of the calculation using the horizontal angle of view (step SB2). In step SE1 of this flowchart, as shown in FIG. 22, the photographing possible limit distance from the direction orthogonal to the width W when the camera (digital camera 1) is at a height of 0 m (in order to capture the entire subject, Let L2-1 be the distance that must be at least the distance from the subject. Also, as shown in FIG. 23, the limit distance that can be taken from the direction perpendicular to the depth D when the camera (digital camera 1) is at a height of 0 m is L2-3.

  In step SE2, an imaging limit line is calculated from the horizontal angle of view, the width of the subject 32 (width W of the rectangular parallelepiped 321 replaced with the subject 32), and the depth (depth D of the rectangular parallelepiped 321 replaced with the subject 32).

FIG. 22 is a diagram showing a method of calculating the shootable limit distance L2-1 executed in step SC1. In this figure, the horizontal angle of view θ2 is calculated by the equation (28). Further, the width W and the depth D of the subject are acquired at step SA3 and are known. Therefore,
From tanθ1 / 2 = W / L2-1 L2-1 = W / tanθ1
It becomes.
Also,
From tanθ1 / 2 = D / L2-3 L2-3 = D / tanθ1
It becomes.

  Then, an area is assumed in which the distance from the rectangular parallelepiped 321 is L2-1 or L2-3 no matter where 360 ° around the rectangular parallelepiped 321 where the subject 32 is replaced. Then, as shown in FIG. 24, a region surrounded by a thick line is a region where the distance from the rectangular parallelepiped 321 is L2-1 or L2-3, and this region can capture the entire subject 32 in the horizontal direction. It becomes an impossible horizontal shooting impossible area.

  Further, since the rectangular parallelepiped 321 in which the subject is replaced in Step SA4 is the origin object, attention is paid only to the first quadrant. Then, in the first quadrant, the horizontal imaging impossible area can be divided into areas D, E, and F. Then, coordinates on the photographing limit lines DL, EL, and FL indicated by bold lines are obtained for each of the regions D, E, and F.

The coordinates of these regions D, E, and F on the thick lines DL, EL, and FL can be obtained and specified as follows.
(1) Coordinate calculation method of photographing limit line DL of region D Circle D passing through three points (W / 2, D / 2), (−W / 2, D / 2), (0, L2-1 + D / 2) On the circumference.
(2) Three points (W / 2, D / 2), (−W / 2, D / 2), and (x coordinate W / 2 on the circle C) on the imaging limit line EL of the region E It is on the circumference of the passing circle E.
(3) A circle passing through three points (W / 2, D / 2), (W / 2, −D / 2), and (0, L2−3 + D / 2) on the imaging limit line FL of the region F It is on the circumference of F.

  Then, the calculation of the photographing limit line in step SE2 is executed according to the flowchart shown in FIG. 25A using the above calculation method. That is, the equations of the three circles shown in (1), (2) and (3) are obtained (step SF1). Next, corresponding coordinates on the circles D, E, and F are calculated (step SF2).

  The process of step SF2 is executed according to the flowchart shown in FIG. First, an initial value “0” is set to the variable x that specifies the value of the x coordinate (step SG1). Since this variable x is counted up in step SG3, it is determined whether or not the value of x counted up is the x coordinate + radius of the center of the circle (each circle D, E, F) ( Step SG2). Then, the coordinate calculation is completed by reading the coordinates (x, z) on each of the circles D, E, and F while counting up the value of the x coordinate until the determination in step SG2 becomes YES.

  Therefore, when the processing according to the flowchart shown in FIG. 25B is performed on the circles D, E, and F in step SF2, the circles D, E, and F in the first quadrant in FIG. The coordinates (x, z) (including the thick line part and the dotted line part) are obtained.

  Thereafter, in the coordinates (x, z) on the circumference of the circles D, E, and F (including the thick line portion and the dotted line portion) in the first quadrant, from x = 0 to the intersection of the circles D and E, the circle The coordinates on the circumference of D are acquired (step SF3). From the intersection of the circles D and E to the intersection of the circles E and F, the coordinates on the circumference of the circle E are acquired (step SF4). From the intersection of the circles E and F to z = 0, the coordinates on the circumference of the circle F are acquired (step SF5).

  With the above processing, a plurality of coordinates (x, z) indicating the photographing limit lines DL, EL, and FL in the first quadrant are obtained, and the other second, third, and fourth quadrants depend on the quadrant. If the sign of x and z is exchanged, a series of coordinates indicating the photographing limit line PL2 surrounding the rectangular parallelepiped 321 shown in FIG. 24 can be obtained.

  FIG. 26 is a flowchart showing a procedure for calculating a comprehensive shooting area (step SB3). The photographing limit line PL1 shown in FIG. 19 is compared with the photographing limit line PL2 shown in FIG. 24 (step SH1). Then, the outermost line of the photographing limit line PL1 and the photographing limit line PL2 is connected (step SH2), and the inner region surrounded by the connected annular line is extracted (step SH3). .

  Further, the extracted area is rotated and displayed in color according to the angle θn (step SH3). That is, when a series of coordinates indicating the imaging limit line PL2 surrounding the rectangular parallelepiped 321 shown in FIG. 24 is obtained, which direction of the east, west, south, and north the width W plane and the depth D plane shown in FIG. Not considered. However, as described with reference to FIG. 7, the subject position / size storage area 212 stores the subject direction (θn). The direction (θn) of the subject is stored as the angle (θn) of the virtual center line Zn crossing the subject 32 with respect to the north-south axis Z. Therefore, based on this θn, it is possible to detect which direction the width W plane and the depth D plane face. Therefore, when finally displaying on the liquid crystal display unit 3, the region is rotated and displayed based on the θn.

  Thus, as shown in FIG. 27, the non-photographable area 322 that surrounds the subject 32 and includes the outermost line of the photographing limit line PL1 and the photographing limit line PL2 and the colored area inside the liquid crystal display is displayed. It is displayed superimposed on the map displayed in part 3. Accordingly, when the photographer moves to a position excluding the non-photographable area 322, the entire subject 32 can be reliably photographed. At this time, the current position 323 is also displayed as shown in the figure, so that the positional relationship between the non-photographable area 322 and the current position 323 can be grasped.

  In the second embodiment described above, the above-described three types of photographing possible limit distances L1, L2-1, and L2-3 are used. However, the photographing limit distance L2-2 shown in FIG. 28 may be used. This figure is a diagram showing a method of calculating the photographic possible limit distance L2-2.

In this figure, the horizontal angle of view θ2 is calculated by the equation (28). Further, the width W and the depth D of the subject are acquired at step SA3 and are known. Therefore, the diagonal e is from the width W and the depth D,
e = √W2D2
Since the horizontal angle of view θ2 is already known,
From tanθ2 / 2 = e / L2-2 L2-2 = e / tanθ2
It becomes.

  Then, the area where the distance from the rectangular parallelepiped 321 is L2-1, L2-3 and L2-2 is 360 ° around the rectangular parallelepiped 321 where the subject 32 is replaced, as in the second embodiment described above. Assuming the area surrounded by Thereafter, the coordinates of the thick line are obtained in the first quadrant, and for the other second, third, and fourth quadrants, if the sign of x and z is switched according to the quadrant, the rectangular parallelepiped 321 shown in FIG. 19 is surrounded. A series of coordinates indicating the photographing limit line PL1 to be obtained is obtained.

  In the embodiment, as shown in FIG. 2, map image data for displaying a map having a predetermined standard size (predetermined scale) is stored in the flash memory 21 and determined in advance as a scenic spot. A map storage area 211 in which scenic spot data indicating the selected area is stored corresponding to the map data, and corresponds to the subject to be photographed in the scenic spot for each scenic spot, and the latitude and longitude of the subject Position information (position coordinates xn, yn), position (size) indicating the size (depth, D), width (W), and height (H) of the subject stored in the map An equal storage area 212 is provided. However, without providing these, the digital camera 1 may be provided with an Internet connection function, and such information may be acquired from a server on the Internet.

As mentioned above, although embodiment of this invention was described, this invention is not limited to these, The invention described in the claim and its equal range are included.
The claims appended at the time of filing this application will be appended below.

<Claim 1>
Subject information acquisition means for acquiring information about the size of the subject;
Angle-of-view information acquisition means for acquiring information about the angle of view of the optical system that forms an image of the subject;
An imaging support apparatus, comprising: a calculation unit that calculates a suitable position or an inappropriate position for photographing an object imaged by the optical system based on information acquired by the both information acquisition units.

<Claim 2>
2. The photographing support apparatus according to claim 1, further comprising display control means for displaying a position suitable for photographing the subject calculated by the calculating means or an inappropriate position.

<Claim 3>
The photographing support apparatus according to claim 1, wherein the calculation unit calculates a position where the entire subject is within an angle of view of the optical system as a position suitable for the photographing.

<Claim 4>
It further comprises current position acquisition means for acquiring the current position,
The display control means displays a current position acquired by the current position acquisition means and a position suitable for photographing the subject calculated by the calculation means or an inappropriate position. The imaging support apparatus according to claim 2.

<Claim 5>
A map data acquisition means for acquiring map data for displaying a map;
The display control means displays a map based on the map data acquired by the map data acquisition means, and the current position on the map and a position suitable for photographing the subject or an inappropriate position The photographing support apparatus according to claim 4, wherein:

<Claim 6>
6. The photographing support apparatus according to claim 5, wherein the display control means displays on the map a guide that leads to a position suitable for photographing the subject from the current position.

<Claim 7>
2. The calculation unit according to claim 1, wherein the calculation unit calculates a region suitable for photographing a subject imaged by the optical system based on the information acquired by the information acquisition unit. 6. The photographing support apparatus according to any one of 6.

<Claim 8>
The photographing support apparatus according to claim 1, wherein the subject information acquisition unit further includes a unit that acquires information related to the position of the subject.

<Claim 9>
9. The photographing support apparatus according to claim 1, wherein the subject information acquisition unit further includes a unit that acquires information related to the direction of the subject.

<Claim 10>
Subject information acquisition means for acquiring information on the position and size of the subject;
Current position acquisition means for acquiring the current position;
Based on the information acquired by the both information acquisition means, a calculation means for calculating an angle of view of an optical system suitable for imaging the subject from the current position;
An optical system specifying means for specifying an optical system based on the angle of view calculated by the calculating means from a plurality of types of interchangeable optical systems;
An imaging support apparatus comprising: output means for outputting information indicating the optical system specified by the optical system specifying means.

<Claim 11>
11. The photographing support apparatus according to claim 10, wherein the output means includes display control means for displaying information indicating the optical system specified by the optical system specifying means.

<Claim 12>
13. The photographing support apparatus according to claim 11 or 12, wherein the calculating means calculates an angle of view that fits the entire subject in one image as an angle of view of an optical system suitable for the photographing.

<Claim 13>
A computer included in the device;
Subject information acquisition means for acquiring information about the size of the subject;
Angle-of-view information acquisition means for acquiring information about the angle of view of the optical system that forms an image of the subject;
An imaging support program that functions as a calculation unit that calculates a suitable position or an inappropriate position for imaging a subject imaged by the optical system based on information acquired by the both information acquisition units.

<Claim 14>
A computer included in the device;
Subject information acquisition means for acquiring information on the position and size of the subject;
Current position acquisition means for acquiring the current position;
Based on the information acquired by the both information acquisition means, a calculation means for calculating an angle of view of an optical system suitable for imaging the subject from the current position;
An optical system specifying means for specifying an optical system based on the angle of view calculated by the calculating means from a plurality of types of interchangeable optical systems;
An imaging support program that functions as an output unit that outputs information indicating an optical system specified by the optical system specifying unit.

<Claim 15>
A subject information acquisition step for acquiring information on the size of the subject;
An angle-of-view information acquisition step of acquiring information about the angle of view of the optical system that forms an image of the subject;
And a calculation step of calculating a suitable position or an inappropriate position for photographing the subject imaged by the optical system based on the information acquired by the both information acquisition steps.

<Claim 16>
Subject information acquisition step for acquiring information on the position and size of the subject;
A current position acquisition step for acquiring the current position;
A calculation step for calculating an angle of view of an optical system suitable for imaging the subject from the current position based on the information acquired by the information acquisition step;
An optical system specifying step for specifying an optical system based on the angle of view calculated by the calculating step from a plurality of types of interchangeable optical systems;
And an output step of outputting information indicating the optical system specified by the optical system specifying step.

1 Digital Camera 3 Liquid Crystal Display Unit 10 CPU
11 Lens block 12 Actuator 13 Driver block 14 CCD
15 Driver 17 Unit circuit 18 DSP
19 SDRAM
20 External memory 21 Flash memory 22 Key input unit 23 GPS module 31 Map 32 Subject 33 Current position mark 34 Cursor 35 Recommended shooting position mark 36 Recommended shooting direction mark 37 Recommended shooting distance comment field 211 Map storage area 212 Size storage area 213 Lens Angle of view information storage area 214 Height storage area 215 Storage area 321 cuboid 322 Non-shootable area 323 Current position AL Shooting limit line BL Shooting limit line DL Shooting limit line EL Shooting limit line FL Shooting limit line

Claims (16)

Subject information acquisition means for acquiring information about the size of the subject;
Angle-of-view information acquisition means for acquiring information about the angle of view of the optical system that forms an image of the subject;
An imaging support apparatus, comprising: a calculation unit that calculates a suitable position or an inappropriate position for photographing an object imaged by the optical system based on information acquired by the both information acquisition units.   2. The photographing support apparatus according to claim 1, further comprising display control means for displaying a position suitable for photographing the subject calculated by the calculating means or an inappropriate position.   The photographing support apparatus according to claim 1, wherein the calculation unit calculates a position where the entire subject is within an angle of view of the optical system as a position suitable for the photographing. It further comprises current position acquisition means for acquiring the current position,
The display control means displays a current position acquired by the current position acquisition means and a position suitable for photographing the subject calculated by the calculation means or an inappropriate position. The imaging support apparatus according to claim 2. A map data acquisition means for acquiring map data for displaying a map;
The display control means displays a map based on the map data acquired by the map data acquisition means, and the current position on the map and a position suitable for photographing the subject or an inappropriate position The photographing support apparatus according to claim 4, wherein:   6. The photographing support apparatus according to claim 5, wherein the display control means displays on the map a guide that leads to a position suitable for photographing the subject from the current position.   2. The calculation unit according to claim 1, wherein the calculation unit calculates a region suitable for photographing a subject imaged by the optical system based on the information acquired by the information acquisition unit. 6. The photographing support apparatus according to any one of 6. The photographing support apparatus according to claim 1, wherein the subject information acquisition unit further includes a unit that acquires information related to the position of the subject. 9. The photographing support apparatus according to claim 1, wherein the subject information acquisition unit further includes a unit that acquires information related to the direction of the subject. Subject information acquisition means for acquiring information on the position and size of the subject;
Current position acquisition means for acquiring the current position;
Based on the information acquired by the both information acquisition means, a calculation means for calculating an angle of view of an optical system suitable for imaging the subject from the current position;
An optical system specifying means for specifying an optical system based on the angle of view calculated by the calculating means from a plurality of types of interchangeable optical systems;
An imaging support apparatus comprising: output means for outputting information indicating the optical system specified by the optical system specifying means.   11. The photographing support apparatus according to claim 10, wherein the output means includes display control means for displaying information indicating the optical system specified by the optical system specifying means.   13. The photographing support apparatus according to claim 11 or 12, wherein the calculating means calculates an angle of view that fits the entire subject in one image as an angle of view of an optical system suitable for the photographing. A computer included in the device;
Subject information acquisition means for acquiring information about the size of the subject;
Angle-of-view information acquisition means for acquiring information about the angle of view of the optical system that forms an image of the subject;
An imaging support program that functions as a calculation unit that calculates a suitable position or an inappropriate position for imaging a subject imaged by the optical system based on information acquired by the both information acquisition units. A computer included in the device;
Subject information acquisition means for acquiring information on the position and size of the subject;
Current position acquisition means for acquiring the current position;
Based on the information acquired by the both information acquisition means, a calculation means for calculating an angle of view of an optical system suitable for imaging the subject from the current position;
An optical system specifying means for specifying an optical system based on the angle of view calculated by the calculating means from a plurality of types of interchangeable optical systems;
An imaging support program that functions as an output unit that outputs information indicating an optical system specified by the optical system specifying unit. A subject information acquisition step for acquiring information on the size of the subject;
An angle-of-view information acquisition step of acquiring information about the angle of view of the optical system that forms an image of the subject;
And a calculation step of calculating a suitable position or an inappropriate position for photographing the subject imaged by the optical system based on the information acquired by the both information acquisition steps. Subject information acquisition step for acquiring information on the position and size of the subject;
A current position acquisition step for acquiring the current position;
A calculation step for calculating an angle of view of an optical system suitable for imaging the subject from the current position based on the information acquired by the information acquisition step;
An optical system specifying step for specifying an optical system based on the angle of view calculated by the calculating step from a plurality of types of interchangeable optical systems;
And an output step of outputting information indicating the optical system specified by the optical system specifying step.