JP5797069B2 - Imaging apparatus, control method thereof, and control program - Google Patents

Description

  The present invention relates to an imaging device, a control method thereof, and a control program.

  2. Description of the Related Art Conventionally, in an imaging device such as a digital camera, the orientation of an image obtained as a result of imaging is determined according to the detection result of an inclination sensor provided in the imaging device. The orientation of the image is stored in the memory as attribute information of the image file. When reproducing the image file, the PC or the imaging device rotates the image according to the attribute information and displays it on the display device (see Patent Document 1).

JP 2002-158959 A

  Incidentally, since the optical axis and the gravitational direction are the same in up or down shooting where the tilt angle is about 90 degrees during shooting, the tilt sensor cannot detect the tilt with respect to the optical axis.

  For this reason, attribute information indicating the orientation of the image cannot be stored in the memory together with the image file, and it is difficult to reproduce the image with a composition intended by the user at the time of reproduction.

  Accordingly, an object of the present invention is to provide an imaging apparatus capable of reproducing an image with a composition intended by the user at the time of shooting, even if the optical axis and the direction of gravity are the same at the time of shooting, and a control method therefor And providing a control program.

In order to achieve the above object, an imaging apparatus according to the present invention is an imaging apparatus that captures an image of a subject and captures the image of the subject by directing the imaging device along the direction of gravity. and the roll angle of detection means for detecting a roll angle of the imaging device as a reference angle when in the position, in accordance with the photographer's position criteria predetermined and sensed roll angle by the roll angle of the detection means Photographer position calculating means for obtaining the position of the photographer with respect to the imaging device as photographer position information, composition information calculating means for obtaining composition information indicating a downward direction of the image according to the photographer position information, and the composition Storage control means for storing information in a memory in association with the image.

The control method according to the present invention is a control method for an imaging apparatus that captures an image of a subject and obtains an image. When the subject is imaged with the roll angle detection sensor directed toward the imaging apparatus along the direction of gravity, the imaging apparatus depending where next composition located on the roll angle and roll angle degree detection step for detecting a photographer's position criteria predetermined and the roll angle detection sensor in the detected roll angle of the imaging device as a reference angle A photographer position calculating step for obtaining the position of the photographer with respect to the imaging device as photographer position information; a composition information calculating step for obtaining composition information indicating a downward direction of the image according to the photographer position information; A storage control step of storing composition information in a memory in association with the image.

A control program according to the present invention is a control program used in an imaging apparatus that captures an image of a subject and obtains an image, and the imaging apparatus is directed toward a computer provided in the imaging apparatus along a direction of gravity by a roll angle detection sensor. when imaging an object, and a roll angle of detection step for detecting a roll angle of the imaging device as a reference angle when said imaging device is in the landscape orientation position, predetermined and the roll angle detection sensor in the detected roll angle A photographer position calculating step for obtaining the position of the photographer with respect to the imaging device as photographer position information according to the photographer position determination criterion, and a composition indicating a downward direction of the image according to the photographer position information. A composition information calculating step for obtaining information, and a storage control step for storing the composition information in a memory in association with the image. Characterized in that to execute and.

  According to the present invention, even when the optical axis of the imaging apparatus and the direction of gravity are the same during shooting, a shot image can be reproduced with a composition intended by the user during shooting. As a result, the user can view the reproduced image comfortably.

1 is a block diagram illustrating a configuration of an example of an imaging apparatus according to a first embodiment of the present invention. 2A and 2B are diagrams for explaining the definition of an angle in the camera shown in FIG. 1, in which FIG. 1A is a diagram showing a roll angle, FIG. 2B is a diagram showing a photographer roll angle, and FIG. It is. 3 is a flowchart for explaining a photographing processing procedure in the camera shown in FIG. 1. FIG. 2 is a diagram illustrating a change in a photographer roll angle, camera operation, and camera posture in the camera shown in FIG. 1. It is a figure which shows the state which image | photographs the doll placed on the desk using the camera shown in FIG. 1 as a camera facing down, (a) made the left side of the camera the lower side of a composition with a roll angle of 90 degrees. The figure which shows the state at the time, (b) is the figure which shows the state when the roll angle is 0 degrees and the lower side of the camera is the lower side of the composition, (c) is the roll angle is -90 degrees and the right side of the camera It is a figure which shows the state at the time of setting it as the lower side of a composition. 4 is a flowchart for explaining a composition information calculation process shown in FIG. 3. It is a flowchart for demonstrating the photographer position calculation process shown in FIG. It is a block diagram which shows the structure about an example of the imaging device by the 2nd Embodiment of this invention. It is a figure for demonstrating the inclination angle detected by the inclination sensor shown in FIG. It is a flowchart for demonstrating the imaging | photography process sequence in the camera shown in FIG. It is a block diagram which shows the structure about an example of the imaging device by the 3rd Embodiment of this invention. FIGS. 12A and 12B are diagrams for explaining an example of roll angle detection by the DSP shown in FIG. 11, in which FIG. 11A is a diagram illustrating a state in which a doll on a desk is photographed downward, and FIG. The figure which shows the state which carried out the degree roll rotation, (c) is a figure which shows the image in the state shown to (a) and (b).

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

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

  In FIG. 1, the illustrated imaging apparatus is a so-called digital camera (hereinafter simply referred to as a camera), and this camera has a CPU 101. The CPU 101 controls the entire camera. The imaging unit 102 includes a solid-state image sensor, and an optical image formed on the solid-state image sensor is converted into an electric signal (analog signal) by the solid-state image sensor. Thereafter, the imaging unit 102 converts the analog signal into a digital signal by A / D conversion, and outputs it as image data.

  The ROM 103 stores operation processing procedures performed by the CPU 101 (for example, programs such as processing when the camera is turned on and basic input / output processing). The RAM 104 is used as a main memory for the CPU 101. Various programs including a control program for performing processing to be described later are loaded into the RAM 104 and the like. Then, the CPU 101 executes the various programs. The RAM 104 is used as a work area when the CPU 101 executes various processes.

  The storage medium 105 is detachable from the camera, and the CPU 101 stores image data and the like in the storage medium 105 via a storage medium mounting unit (media drive: not shown). Further, the CPU 101 reads out image data and the like stored in the storage medium 105 via the storage field pair mounting unit.

  The rotation sensor 106 (roll angle detection means: roll angle detection sensor) is a sensor that detects a rotation angle (roll angle) around the optical axis of the camera. In the illustrated example, the rotation sensor 106 includes a gyroscope used in an aircraft, a portable information device, a game controller, or the like. The rotation sensor 106 integrates and calculates angular acceleration detected by the gyroscope twice to calculate a relative roll angle with respect to a predetermined reference angle.

  The operation unit 108 includes a power button for turning on the camera and a button for setting a shooting mode. Then, the user performs various menu operations using the operation unit 108.

  The display device 109 (display unit) performs various displays under the control of the CPU 101. For example, in the playback mode, the display device 109 displays image data (also referred to as an image file) stored in the storage medium 105 as an image. In addition, the image data is displayed as a live view on the display device 109 at the time of shooting.

  The release switch 110 is operated by the user during shooting. Each component (block) described above is connected to each other by a system bus (address bus, data bus, and control bus) 112.

  Here, the angle in the camera shown in FIG. 1 is defined.

  FIG. 2 is a view for explaining the definition of the angle in the camera shown in FIG. FIG. 2A shows the roll angle, and FIG. 2B shows the anti-photographer roll angle. FIG. 2C shows the tilt angle.

  In FIG. 2A, the roll angle refers to a rotation angle about the optical axis 201 of the camera 200 and is used to represent a change in the posture of the camera 200. Here, as shown in FIG. 2B, an axis extending in the horizontal direction (horizontal direction) along the shoulder line of the user (photographer) is defined as the first axis 202. In addition, an axis extending along the bottom surface of the camera 200 is a second axis 203. An angle formed by the first axis 202 and the second axis 203 is referred to as a counter photographer roll angle. This counter-photographer roll angle becomes 0 degrees when the photographer takes a picture with the camera 200 as the horizontal composition position.

  In the illustrated example, the reference angle is set to 0 degrees for the rotation sensor 106 in a state where the photographer roll angle is 0 degrees, such as when the power is turned on or a menu is operated. Thereby, the photographer roll angle can be obtained from the output of the rotation sensor 106.

  Note that the user generally operates the menu roll including the operation of pressing the power button with the anti-photographer roll angle set to 0 degree. When menu operations are performed, the grip and menu arrangement provided in the camera are designed so that the photographer roll angle is 0 degrees. Here, a description will be given assuming that the roll angle with respect to the photographer is 0 degrees in the menu operation including the power operation.

  In FIG. 2C, when the camera is viewed from the side, an angle obtained by subtracting an angle formed by the axis of gravity (gravity axis) and the optical axis of the camera from an angle of 90 degrees is referred to as a tilt angle.

  FIG. 3 is a flowchart for explaining a photographing processing procedure in the camera shown in FIG.

  Referring to FIGS. 1 and 3, when the power button is turned on at operation unit 108, CPU 101 starts a photographing process. That is, when the power button is turned on, the CPU 101 sets the photographer roll angle to 0 degrees in the rotation sensor 106 (step S501). In the following description, the CPU 101 can set an arbitrary angle for the rotation sensor 106 at an arbitrary time point. Further, when the CPU 101 acquires the detection angle from the rotation sensor 106, the CPU 101 acquires the detection angle detected by the rotation sensor 106 using a preset angle as a reference angle.

  Subsequently, the CPU 101 determines whether or not the power button is turned off (step S502). When the power button is turned off (YES in step S502), CPU 101 ends the photographing process.

  On the other hand, if the power button is not turned off (NO in step S502), CPU 101 determines whether or not the user has performed a menu operation by operating operation unit 108 (step S503). When a menu operation is performed (YES in step S503), CPU 101 corrects the photographer roll angle to 0 degrees (step S504).

  As described above, since the rotation sensor 106 includes a gyroscope and integrates angular acceleration twice, an error occurs in the output rotation angle. Accordingly, in step S504, the photographer roll angle is corrected to 0 degree. That is, a process for correcting the anti-photographer roll angle is performed.

  If an error in the rotation angle can be ignored by using an omnidirectional magnet for the rotation sensor 106, the processing in step S504 is not necessary.

  Next, the CPU 101 determines whether or not the release switch (SW) 110 has been pressed (step S505). If the release switch has not been pressed (NO in step S505), CPU 101 returns to the process in step S502. If no menu operation is performed in step S503 (NO in step S503), the CPU 101 proceeds to the process in step S505.

  When the release switch is pressed (YES in step S505), the CPU 101 controls the imaging unit 102 to execute a shooting operation (step S506). Here, the CPU 101 stores image data obtained as a result of the shooting operation in the RAM 104. In step S506, the image data is not stored in the storage medium 105.

  Subsequently, the CPU 101 performs an anti-photographer roll angle correction process (step S507). In this anti-photographer roll angle correction process, an angle in which the anti-photographer roll angle is within a predetermined range with respect to any one angle (predetermined angle) of −90 degrees, 0 degrees, and 90 degrees at the time of photographing. If so, it is assumed that photographing was performed at any one of these angles with respect to the photographer roll angle. For example, if the difference between the predetermined angle and the anti-photographer roll angle is within 15 degrees, the anti-photographer roll angle is set to the predetermined angle.

  If an error in the rotation angle can be ignored by using an omnidirectional magnet for the rotation sensor 106, the processing in step S507 is not necessary.

  Subsequently, the CPU 101 performs composition information calculation processing described later (step S508). In this composition information calculation process, composition information intended by the photographer is determined. As composition information, for example, one of the lower side on the right side of the image, the lower side on the left side of the image, and the lower side on the lower side of the image is determined.

  After obtaining the composition information described above, the CPU 101 associates the image data stored in the RAM 104 and the composition information and stores them in the storage medium 105. Thereafter, the CPU 101 returns to the process of step S502.

  FIG. 4 is a diagram illustrating changes in the camera roll angle, camera operation, and camera posture in the camera shown in FIG. 1.

  In FIG. 4, it is assumed that a menu operation is performed at time T = 11. In this case, regardless of the posture change of the camera (that is, even if there is no posture change of the camera), the photographer roll angle is set to 0 degree in the process of step S504 described above. At time T = 19, even if there is no change in the posture of the camera, the photographer roll angle is set to 90 degrees by the processing in step S507.

  Here, the relationship between the position of the photographer at the time of photographing and the composition intended by the photographer will be described.

  FIG. 5 is a diagram showing a state where the doll placed on the desk is photographed with the camera facing downward using the camera shown in FIG. FIG. 5A is a diagram showing a state when the roll angle is 90 degrees and the left side of the camera is the lower side of the composition, and FIG. 5B is a view showing the lower side of the camera when the roll angle is 0 degrees. It is a figure which shows the state at the time of setting it as the lower side of a composition. FIG. 5C is a diagram illustrating a state where the roll angle is −90 degrees and the right side of the camera is the lower side of the composition.

  In FIG. 5A, the photographer 502 is located on the left side of the camera 200 when viewed from the back side of the sheet. In this case, when displaying the photographed image, if the left side of the photographed image is displayed as the lower side on the display, the head of the doll 501 (subject) is displayed on the upper side, and the foot is displayed on the lower side.

  In FIG. 5B, the photographer 502 is located below the camera 200 when viewed from the back side of the sheet. In this case, if the lower side of the captured image is displayed as the lower side of the display when displaying the captured image, the head of the doll 501 is displayed on the upper side and the foot is displayed on the lower side. .

  In FIG. 5C, the photographer 502 is located on the right side of the camera 200 when viewed from the back side of the paper. In this case, when the captured image is displayed, if the right side of the captured image is displayed as the lower side on the display, the head of the doll 501 is displayed on the upper side and the foot is displayed on the lower side.

  In this manner, the composition intended by the photographer can be known from the positional relationship between the camera and the photographer, and composition information can be obtained thereby.

  FIG. 6 is a flowchart for explaining the composition information calculation process shown in FIG.

  In FIG. 6, when the composition information calculation process is started, the CPU 101 performs a photographer position calculation process, which will be described later, to obtain photographer position information (step S601). Then, the CPU 101 obtains composition information according to the photographer position information (step S602). Thereafter, the CPU 101 ends the composition information calculation process.

  Here, if the photographer position information indicates that the photographer is located on the right side of the camera, the CPU 101 obtains composition information indicating that the right side of the image is the downward direction. If the photographer position information indicates that the photographer is located on the left side of the camera, the CPU 101 obtains composition information indicating that the left side of the image is downward. Then, if the photographer position information indicates that the photographer is located below the camera, the CPU 101 obtains composition information indicating that the lower side of the image is the downward direction.

  FIG. 7 is a flowchart for explaining the photographer position calculation processing shown in FIG. In the photographer position calculation process, the CPU 101 obtains the photographer's position according to a predetermined photographer position determination criterion.

  In FIG. 7, when the photographer position calculation process is started, the CPU 101 acquires the photographer roll angle from the rotation sensor 106 (step S701). Subsequently, the CPU 101 determines whether or not the photographer roll angle is −90 degrees (third reference: step S702). When the photographer roll angle is −90 degrees (YES in step S702), the CPU 101 determines that the photographer 502 is located on the right side of the camera, and obtains photographer position information indicating the right side of the photographer ( Step S703). Then, the CPU 101 ends the photographer position calculation process.

  If the anti-photographer roll angle is not −90 degrees (NO in step S702), the CPU 101 determines whether or not the anti-photographer roll angle is 0 degree (second reference: step S704). When the photographer roll angle is 0 degrees (YES in step S704), CPU 101 determines that photographer 502 is located below camera 200, and photographer position information indicating the photographer lower side. Is obtained (step S705). Then, the CPU 101 ends the photographer position calculation process.

  If the anti-photographer roll angle is not 0 degrees (NO in step S704), the CPU 101 determines whether or not the anti-photographer roll angle is 90 degrees (first reference: step S706). When the photographer roll angle is 90 degrees (YES in step S706), CPU 101 determines that photographer 502 is located on the left side of camera 200, and obtains photographer position information indicating the photographer left side. (Step S707). Then, the CPU 101 ends the photographer position calculation process.

  If the photographer roll angle is not 90 degrees (NO in step S706), the CPU 101 determines that the photographer 502 is located below the camera 200, and obtains photographer position information indicating the photographer lower side. Obtain (step S708). Then, the CPU 101 ends the photographer position calculation process. In step S708, it is assumed that the CPU 101 cannot determine the position of the photographer, and the photographer 502 is positioned below the camera 200 as a default.

  When shooting with the camera 200 held in a normal manner, it is difficult to rotate the camera 200 180 degrees. For this reason, the CPU 101 assumes that the photographer roll angle is incorrect when the photographer roll angle is 180 degrees, and the photographer is positioned on the lower side of the image as a default.

  In the processes in steps S702, S704, and S706, a predetermined range is set at the time of determination. As described above, this predetermined range is ± 15 degrees. That is, if the anti-photographer roll angle is within a range of ± 15 degrees, the CPU 101 determines that the anti-photographer roll angle is −90 degrees, 0 degrees, or 90 degrees.

  As described above, in the first embodiment, the photographer intends in the case of the downward shooting in which the camera is directed downward with respect to the shooting target as in the case of shooting the doll placed on the desk. The photographed image data is stored in the memory together with composition information indicating the composition. Therefore, when the captured image data is reproduced by a camera or a PC, if the captured image data is reproduced according to the composition information, the image can be easily viewed with the composition intended by the photographer.

  Furthermore, even if there is a detection error in the rotation sensor, since the detection error is corrected, composition information indicating the composition intended by the photographer can be obtained with high accuracy.

[Second Embodiment]
FIG. 8 is a block diagram showing the configuration of an example of an imaging apparatus according to the second embodiment of the present invention.

In the camera shown in FIG. 8, the same components as those in the camera shown in FIG. The camera shown in FIG. 8 has a tilt sensor 107 (tilt angle detection means) and a tilt sensor 111 (tilt angle detection means). The tilt sensor 107 detects the angle (tilt angle) of the camera in the tilt direction using the principle of a pendulum. That is, the tilt sensor 107 detects a tilt angle that is an angle formed between a direction orthogonal to the direction of gravity and the optical axis of the imaging apparatus.
The tilt sensor 111 detects the angle between the camera and the horizontal plane near the tilt angle of 0 degrees as the tilt angle using the principle of the pendulum.

  In the camera shown in FIG. 8, the CPU 101 corrects the photographer roll angle based on the tilt angle and the tilt angle detected by the tilt sensor 107 and the tilt sensor 111.

  In the illustrated example, the tilt sensor 111 is effective near a tilt angle of 0 degrees, and the tilt angle detected by the tilt sensor 111 is used as the photographer roll angle. As described in connection with the first embodiment, when the rotation sensor 106 uses a gyroscope, a detection error in the rotation sensor 106 increases. However, in the vicinity of the tilt angle of 0 degree, the error with respect to the photographer roll angle is set as the detection angle (tilt angle) of the tilt sensor 111 to reduce the error.

  FIG. 9 is a diagram for explaining the tilt angle detected by the tilt sensor 111 shown in FIG.

  As shown in FIG. 9, here, an angle formed by the axis 203 extending along the bottom surface of the camera 200 and the horizontal plane 901 is an inclination angle, and an arrow direction (counterclockwise direction) in the figure is a plus direction.

  FIG. 10 is a flowchart for explaining a photographing process procedure in the camera shown in FIG. In FIG. 10, the same processing as the processing (step) shown in FIG.

  With reference to FIGS. 8 and 10, in step S <b> 506, CPU 101 controls imaging unit 102 to perform imaging, and stores image data obtained as a result of the imaging operation in RAM 104. Thereafter, the CPU 101 acquires the tilt angle from the tilt sensor 107 and determines whether or not the current tilt angle is 0 degree (step S1001).

  If the tilt angle is not 0 degrees (NO in step S1001), the CPU 101 performs the process of step S507 described with reference to FIG. On the other hand, if the tilt angle is 0 degree (YES in step S1001), the CPU 101 acquires the tilt angle from the tilt sensor 111, sets the tilt angle as the anti-photographer roll angle, and sets the current anti-photographer roll. The angle is corrected (step S1002). Thereafter, the CPU 101 performs the process of step S508 described with reference to FIG.

  In the tilt angle determination performed in step S1001, the tilt angle is not limited to 0 degrees, but within a predetermined range near the tilt angle of 0 degrees that allows the tilt sensor 111 to accurately detect the tilt angle. I just need it. That is, in step S1001, if the tilt angle is within a predetermined range with reference to 0 degree, the CPU 101 performs the process of step S1002.

  As described above, in the second embodiment, each time the tilt angle is close to 0 degrees, the anti-photographer roll angle is corrected by the tilt angle, so that the positional relationship between the photographer and the camera is obtained more accurately. be able to.

[Third Embodiment]
FIG. 11 is a block diagram showing the configuration of an example of an imaging apparatus according to the third embodiment of the present invention.

  In the camera shown in FIG. 11, the same components as those in the camera shown in FIG. The camera shown in FIG. 8 has a DSP (digital signal processor) 1201 instead of the rotation sensor 106. The DSP 1201 shown in the figure analyzes the image data obtained from the imaging unit 102 at high speed, and performs corresponding point extraction and motion vector detection between frames. Then, a roll angle around the optical axis of the camera is detected according to the motion vector at the corresponding point.

  FIG. 12 is a diagram for explaining an example of roll angle detection by the DSP 1201 shown in FIG. FIG. 12A is a view showing a state in which the doll on the desk is photographed downward, and FIG. 12B is a view showing a state in which the camera is rotated 90 degrees from the state shown in FIG. . FIG. 12C shows an image in the state shown in FIGS. 12A and 12B.

  Now, suppose that the camera is positioned on the upper side of the photographer as viewed from the back side of the paper in order for the photographer 502 to photograph the doll 501 placed on the desk downwards (horizontal position shooting: see FIG. 12A). Thereafter, it is assumed that the photographer rotates the camera 200 by 90 degrees in order to prepare for vertical position shooting (see FIG. 12B).

  Here, when both the captured image obtained by the state shown in FIG. 12A and the state shown in FIG. 12B are displayed, the display result shown in FIG. 12C is obtained. That is, when the posture is changed from the state shown in FIG. 12A to the state shown in FIG. 12B, the image of the doll rotates to the right and changes from the state indicated by reference symbol G1 to the state indicated by reference symbol G2.

  As described above, the DSP 1201 extracts the corresponding points A (T) and A (T ′) between the frames and detects the motion vectors of the corresponding points A (T) and A (T ′). Then, the DSP 1201 obtains a roll angle according to the direction of motion and the magnitude of the motion vectors of the corresponding points A (T) and A (T ′) with respect to the center of the image. Then, the DSP 1201 gives the roll angle to the CPU 101.

  When detecting corresponding point extraction between frames and motion vector detection, for example, a technique used in an inter-frame compression technique for moving images is used. Moreover, since the imaging process in the camera shown in FIG. 11 is the same as that in FIG. 3, the description thereof is omitted here.

  Thus, in the third embodiment, since the roll angle is obtained by the processing in the DSP, it is not necessary to provide a rotation sensor. In general, since a digital camera is provided with a DSP for capturing and compressing a moving image, it is only necessary to extract corresponding points between frames and detect a motion vector using the DSP. Therefore, if the roll angle is detected using a DSP, it is not necessary to provide a separate rotation sensor, and cost reduction can be realized.

  Furthermore, if a DSP is used, the roll angle can be detected with higher accuracy than a gyroscope, so that a reproduced image can be viewed with an accurate composition.

  As is clear from the above description, in FIG. 1 and the like, the CPU 101 functions as a photographer position calculation unit, composition information calculation unit, and storage control unit. Further, the CPU 101 functions as a display control unit and a correction unit.

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

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

At this time, each of the control method and control program will have at least the roll angle of the detection step, the photographer position calculation step, composition information calculation step, and the storage control step.

  The present invention can also be realized by executing the following processing. That is, software (program) for realizing the functions of the above-described embodiments is supplied to a system or apparatus via a network or various recording media, and a computer (or CPU, MPU, etc.) of the system or apparatus reads the program. It is a process to be executed.

101 CPU
102 Imaging unit (imaging device)
105 Storage Medium 106 Rotation Sensor 107 Tilt Sensor 108 Operation Unit 109 Display Device 110 Release Switch 111 Tilt Sensor 1201 DSP

Claims (10)

In an imaging device that captures an image of a subject and obtains an image,
When imaging the subject toward the imaging device along a gravity direction, and the roll angle of detection means and the image pickup device for detecting a roll angle of the imaging device as a reference angle when in the landscape orientation position,
A photographer position calculating means for calculating as a photographer position information a position of the photographer for the image pickup apparatus in accordance with the predetermined photographer position criteria and sensed roll angle by the roll angle degree detecting means,
Composition information calculating means for obtaining composition information indicating a downward direction of the image according to the photographer position information;
An image pickup apparatus comprising: storage control means for storing the composition information in a memory in association with the image.   The display control means for rotating the image in accordance with a downward direction of the image with reference to the composition information when the image stored in the memory is displayed on a display unit. The imaging device described. The reference angle is such that the roll angle is 0 degree,
The photographer position determination standard includes a first reference that the photographer is positioned on the left side of the imaging device when the roll angle is within a predetermined range centering on 90 degrees, and the roll angle is 0 degrees. And the second reference that the photographer is positioned below the imaging device when it is within the predetermined range, and the roll angle is within the predetermined range about -90 degrees. The imaging apparatus according to claim 1, further comprising a third reference that the photographer is positioned on the right side of the photographer.   The composition information calculating means calculates composition information indicating that the right side of the image is downward when the photographer position information indicates that the photographer is located on the right side of the imaging device, and If the photographer position information indicates that the photographer is located on the left side of the imaging device, composition information indicating that the left side of the image is in the downward direction is calculated. The imaging apparatus according to claim 3, wherein composition information indicating that the lower side of the image is in a downward direction is calculated when the person indicates that the person is positioned below the imaging apparatus.   If the roll angle detected by the roll angle detection means does not correspond to any of the first reference, the second reference, and the third reference, the photographer position calculation means defaults to the photographer. 5. The imaging apparatus according to claim 3, wherein photographer position information indicating that the camera is positioned below the imaging apparatus is calculated.   6. The photographing apparatus according to claim 1, further comprising a correcting unit that corrects the roll angle to 0 degree each time the photographer performs a menu operation when the power is turned on. A tilt angle detecting means for detecting a tilt angle that is an angle formed between a direction orthogonal to the gravitational direction and an optical axis of the imaging device;
An inclination angle detecting means for detecting an inclination angle that is an angle formed by a horizontal plane and the imaging device;
The tilt the angle tilt angle detected by the detecting means is within a predetermined range around a zero degree, the photographer position calculating means said tilt sensing instead of the roll angle detected by the roll angle of the detection means The imaging apparatus according to claim 3, wherein an inclination angle detected by the means is used.   The imaging apparatus according to claim 1, wherein the roll angle detection unit detects the roll angle based on a motion vector of a corresponding point between frames of the image. A method of controlling an imaging apparatus that captures an image of a subject and obtains an image,
When imaging the subject toward the imaging device along a gravity direction by the roll angle detection sensor, roll angle degree detection step for detecting a roll angle of the imaging device as a reference angle when said imaging device is in the landscape orientation position When,
A photographer position calculating step for obtaining, as photographer position information, the position of the photographer with respect to the imaging device according to a roll angle detected by the roll angle detection sensor and a predetermined photographer position determination criterion;
Composition information calculation step for obtaining composition information indicating a downward direction of the image according to the photographer position information;
A storage control step of storing the composition information in a memory in association with the image. A control program used in an imaging apparatus that captures an image of a subject and obtains an image,
In the computer provided in the imaging device,
When imaging the subject toward the imaging device along a gravity direction by the roll angle detection sensor, roll angle degree detection step for detecting a roll angle of the imaging device as a reference angle when said imaging device is in the landscape orientation position When,
A photographer position calculating step for obtaining, as photographer position information, the position of the photographer with respect to the imaging device according to a roll angle detected by the roll angle detection sensor and a predetermined photographer position determination criterion;
Composition information calculation step for obtaining composition information indicating a downward direction of the image according to the photographer position information;
And a storage control step of storing the composition information in a memory in association with the image.

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