JP2017204666A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device capable of preventing a photographer from taking an inclined still image unintentionally.SOLUTION: An imaging device 10 has a horizontal correction function that electronically corrects inclination by causing an image processing circuit 18 to cut out or rotate an image in response to the inclination of the imaging device 10 detected by a vibration and inclination detection unit 21, and thereby enables a photographer to simply take a moving image while keeping it horizontal. The imaging device 10 disables the horizontal correction function in a still image photographing preparation state caused by half-press operation of a release switch (SW1) and thereby a user can confirm the inclination state of the imaging device 10 through a live view before still picture photographing.SELECTED DRAWING: Figure 4

Description

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

  Imaging devices such as cameras that prevent image shake due to camera shake have been commercialized. In these imaging apparatuses, image blur is suppressed by moving the image blur correction lens or the image sensor on a plane perpendicular to the optical axis in accordance with the amount of camera shake generated during imaging. In addition, image blur caused by roll rotation is suppressed by rotating the imaging device around the optical axis.

  In moving image shooting, even if you do not have a special mechanical mechanism, electronic correction that reduces the effects of shake and tilt by changing the cutout position of the captured image or rotating the image with image processing An imaging device capable of achieving the above has been commercialized.

  In addition, the inclination angle of the imaging device is detected with high accuracy using an accelerometer, etc., and the inclination of the imaging device with respect to the horizontal plane perpendicular to the direction of gravity is automatically corrected, so that even a user unfamiliar with photography can be kept level Some images can be taken easily. Patent Document 1 discloses an electronic camera device that maintains a horizontal position on a screen by performing rotational coordinate conversion on a video signal captured in accordance with the tilt of an image sensor.

JP 2002-94877 A

  However, when the image is rotated and the tilt is corrected as in Patent Document 1, a part of the captured image data is cut out so that pixels for rotation coordinate conversion can be secured. The angle of view becomes narrow. In moving image shooting, even if the angle of view is narrower than the captured angle of view, it is often possible to perform electronic shake correction by cropping or rotating the image, but in still image shooting, the angle of view becomes narrower. In order to avoid this, electronic shake correction is often disabled. As described above, when tilt correction is possible in movie shooting and tilt correction is not possible in still image shooting, it is not intended when shooting a still image in a movie shooting mode to which tilt correction is applied. A tilted still image may be shot.

  An object of the present invention is to provide an imaging apparatus that can prevent unintentionally tilted still images from being taken.

  An imaging apparatus according to an embodiment of the present invention includes an inclination correction unit that corrects an inclination of an image captured by an imaging unit, a display control unit that controls display of a moving image on a display unit, and a still image shooting preparation state. Determining means for determining whether or not a predetermined operation for entering has been performed, and when the display control means determines that the predetermined operation has been performed, a moving image that does not correct inclination is determined. If it is determined that the predetermined operation has not been performed, control is performed to display a moving image with the tilt corrected.

  According to the imaging apparatus of the present invention, it is possible to prevent an unintentionally tilted still image from being shot.

1 is an external view of an imaging apparatus according to an embodiment of the present invention. It is a block diagram which shows the structural example of an imaging device. It is a figure explaining electronic image blur correction and inclination correction. It is a flowchart which shows operation | movement of the imaging device in 1st Embodiment. It is a flowchart which shows operation | movement of the imaging device in 2nd Embodiment. It is a flowchart which shows operation | movement of the imaging device in 3rd Embodiment. It is a flowchart which shows operation | movement of the imaging device in 4th Embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is an external view of an imaging apparatus according to an embodiment of the present invention.
The connector 112 is a connector that connects the connection cable and the imaging device 10. The recording medium 20 is a recording medium such as a memory card or a hard disk. The recording medium slot 201 is a slot for storing the recording medium 20. The recording medium 20 stored in the recording medium slot 201 can communicate with the imaging device 10. A lid 203 is a lid of the recording medium slot 201. The display unit 13 and the operation unit 14 will be described with reference to FIG.

FIG. 2 is a block diagram illustrating a configuration example of the imaging apparatus 10.
The imaging device 10 includes a CPU (Central Processing Unit) 11, a ROM 12, a display unit 13, an operation unit 14, a DRAM 15, a recording medium I / F 16, an imaging unit 17, an image processing circuit 18, and an image compression / decompression connected via an internal bus 30. A circuit 19 and a shake / tilt detector 21 are provided. The CPU 11 controls each processing unit and data flow described later. The ROM 12 stores a program (firmware) related to the processing procedure of the CPU 11 and various information.

  The display unit 13 is composed of a color liquid crystal display or the like, and is used for displaying images and various types of information and displaying a graphic user interface. The display unit 13 also includes a terminal for outputting a video signal to an external display device such as a TV. The operation unit 14 is an input unit for receiving instructions from the user, and includes various buttons such as a release button and a moving image shooting button, and operation members such as a cross key, a control wheel, and a mode dial.

  The DRAM 15 is used as a work area of the CPU 11 and has a buffer function for temporarily storing image data, display data, data after image compression, and the like. Normally, data is written to and read from the DRAM via a memory controller, which is not shown here. In addition, a DMA controller (not shown) for performing DMA transfer without using Read / Write with the CPU 11 is provided between each processing unit and the DRAM 15.

  The recording medium I / F 16 writes or reads image data to or from the recording medium 20 in accordance with an instruction from the CPU 11. The recording medium 20 is a random-accessible recording medium such as the above-described memory card, optical disk, or hard disk, and is detachable from the imaging apparatus 10. The CPU 11, the DRAM 15, and the recording medium I / F 16 record still images and moving images that are captured images on the recording medium 20. The imaging unit 17 includes a lens, a diaphragm, a shutter, and an imaging element such as a CCD sensor or a CMOS sensor.

  The image processing circuit 18 performs processing such as white balance adjustment and pixel interpolation on the image data read from the imaging unit 17 and converts the image data into YUV data. The image processing circuit 18 resizes the YUV data before being compressed by the image compression / expansion circuit 19 and the decompressed YUV data to an arbitrary size, rotates, and performs color conversion. The image processing circuit 18 generates display image data to be displayed on the display unit 13 and compression image data to be compressed by the image compression / decompression circuit 19. Further, the image processing circuit 18 performs noise reduction processing of fixed pattern noise such as comparatively bright combining processing for generating a trajectory image and scratch / dark shading.

  The image compression / decompression circuit 19 converts the YUV data into JPEG still image data, or H.264 data. H.264 format video data compression, JPEG or H.264 A decompression process is performed to decompress the compressed image data in the H.264 format into YUV data. The shake / tilt detection unit 21 includes a triaxial angular velocity meter that detects angular shake in the xyz axis direction, a triaxial accelerometer that detects acceleration in the xyz axis direction, and the like. The image processing circuit 18 cuts out and rotates the image in accordance with the shake and tilt detected by the shake / tilt detection unit 21 to electronically correct image blur and tilt.

  The CPU 11, ROM 12, display unit 13, operation unit 14, DRAM 15, recording medium I / F 16, imaging unit 17, image processing circuit 18, image compression / decompression circuit 19, and shake / tilt detection unit 21 are connected via an internal bus 30. connect.

FIG. 3 is a diagram for explaining electronic image blur correction and tilt correction.
First, electronic image blur correction in the vertical and horizontal directions of an image will be described with reference to FIG. In the electronic image blur correction in the vertical and horizontal directions, an image shift amount for correcting the angular shake in the xy-axis (pitch / yaw) direction detected by the shake / tilt detection unit 21 is obtained, and is adjusted in accordance with the image shift amount. Perform image clipping processing. An angle of view cut out from the captured image 301 in accordance with the shift amount of the vertical and horizontal images is 302. By performing the clipping process, it is possible to electronically perform image blur correction in the vertical and horizontal directions.

  Next, electronic image blur correction and tilt correction for rotational blur around the optical axis of an image will be described with reference to FIG. In electronic image blur correction and tilt correction with respect to rotational blur around the optical axis of an image, the angle shake in the z-axis direction (roll) detected by the shake / tilt detection unit 21 and a correction amount for correcting the tilt are obtained. Rotate the image. An image obtained by performing rotation processing on the captured image 303 is 304, and the inscribed portion is cut out as an output image 305. By performing the rotation process and the clipping process, electronic image blur correction and tilt correction can be performed electronically for rotational blur around the optical axis.

  As described above, when the image blur and the tilt are corrected electronically, the recorded angle of view becomes narrower than the angle of view taken to cut out a part of the image from the captured image.

(First embodiment)
In the imaging device 10, the image processing circuit 18 electronically corrects the inclination by performing image cutout and rotation in accordance with the inclination of the imaging device 10 detected by the shake / tilt detection unit 21, and the moving image is kept horizontal. It has a horizontal correction function that can be taken easily. In order to electronically correct the tilt, it is necessary to cut out a part of the image from the captured image, and the angle of view recorded with respect to the imaged angle of view becomes narrow. For this reason, the horizontal correction function is not applied during still image shooting. Further, in the still image shooting preparation state by the half-press operation of the release switch (SW1), by disabling the horizontal correction function, the user confirms the tilt state of the imaging device 10 in the live view before shooting the still image. it can.

FIG. 4 is a flowchart illustrating the operation of the imaging apparatus according to the first embodiment.
The CPU 11 controls each unit so as to realize the operation shown in FIG. When the moving image mode is selected by the button operation of the operation unit 14 or the mode dial operation, the processing shown in FIG. 4 is started. In step S101, the CPU 11 captures an image captured by the imaging unit 17 as a moving image frame.

  In step S <b> 102, the CPU 11 performs processing such as white balance adjustment and pixel interpolation on the captured image data of the moving image frame using the image processing circuit 18, converts it into YUV data, and writes it into the DRAM 15. In step S103, the CPU 11 determines whether the release switch of the operation unit 14 is half-pressed (SW1), that is, whether there is a still image shooting preparation instruction. If there is no still image shooting preparation instruction (SW1) in step S103, the process proceeds to step S104, and if there is a still image shooting preparation instruction (SW1), the process proceeds to step S107.

  In step S <b> 104, the CPU 11 detects the tilt angle of the imaging apparatus 10 using the shake / tilt detection unit 21. In step S105, the CPU 11 calculates tilt correction parameters of the image processing circuit 18 such as a correction amount in the image rotation process and a shift amount in the clipping process so as to correct the tilt of the imaging device 10 detected in step S104. In step S <b> 106, the CPU 11 uses the image processing circuit 18 to perform image rotation processing and clipping processing on the image data generated in step S <b> 102 with the tilt correction parameter calculated in step S <b> 105. Thereby, image data in which the inclination of the image generated by the inclination of the imaging device 10 is corrected is generated.

  As described above, in the still image shooting preparation state by the half-press operation (SW1) of the release switch, the horizontal correction function can be disabled, and display control is performed so that the user can check the tilt state of the imaging device 10 in the live view. In step S107, the CPU 11 performs resize processing to the recording size using the image processing circuit 18 on the image data generated in step S102 or the image data subjected to inclination correction in step S106, and compresses the moving image. Data is generated. Then, the generated moving image compression data is written into the DRAM 15.

  In step S108, the CPU 11 compresses the moving image compression data generated in step S107 in the MPEG or Motion JPEG format using the image compression / decompression circuit 19. In step S109, the CPU 11 temporarily stores the moving image data compressed in step S108 in the moving image buffer area on the DRAM 15. In step S110, the CPU 11 performs a resizing process to the display size using the image processing circuit 18 on the image data generated in step S102 or the image data subjected to the tilt correction in step S106, and the display data is displayed. Generate image data. Then, the generated display image data is written into the DRAM 15.

  With the generation of the display image data, the CPU 11 causes the display unit 13 to display the display image data in step S111. That is, the live view display image on the display unit 13 is updated. In step S112, the CPU 11 determines whether or not the release switch of the operation unit 14 is fully pressed (SW2), that is, whether there is a still image shooting instruction. If there is no still image shooting instruction (SW2) in step S112, the process returns to step S101, and the CPU 11 continues processing the next moving image frame. If there is a still image shooting instruction in step S112, the process proceeds to step S113. In step S <b> 113, the CPU 11 captures a still image frame using the imaging unit 17.

  In step S <b> 114, the CPU 11 uses the image processing circuit 18 to perform development processing, that is, white balance adjustment, pixel interpolation, and the like on the captured still image frame image data, and converts the image data into YUV data. Write to DRAM 15. In step S <b> 115, the CPU 11 uses the image compression / decompression circuit 19 to compress and code the developed image data generated in step S <b> 114 into JPEG format still image data, and writes the compressed image data in the DRAM 15. In step S116, the CPU 11 records the JPEG format still image data compression-encoded in step S115 on the recording medium 20 via the recording medium I / F 16, and ends the shooting.

  As described above, according to the present embodiment, the horizontal correction function is disabled in the still image shooting preparation state by the half-press operation (SW1) of the release switch, so that the user can set the imaging device 10 before shooting the still image. You can check the tilt status in live view. This makes it possible to correct tilt when shooting movies and disable tilt correction when shooting still images, and when shooting still images in the movie shooting mode to which tilt correction is applied. It is possible to prevent a still image tilted from being taken.

(Second Embodiment)
Next, an imaging apparatus according to a second embodiment of the present invention will be described. The configuration itself of the imaging apparatus 10 according to the present embodiment is the same as that of the imaging apparatus according to the first embodiment. As in the first embodiment, the imaging apparatus according to the present embodiment has a horizontal correction function, and the horizontal correction function is not applied during still image shooting.

  In addition, in the first embodiment, the horizontal correction function is disabled in the still image shooting preparation state by the half-press operation (SW1) of the release switch. On the other hand, in the present embodiment, in the still image shooting preparation state by the half-press operation (SW1) of the release switch, the tilt correction by the horizontal correction function is invalidated only for the live view display image. Accordingly, it is possible to check the tilt state of the imaging apparatus 10 with a live view before taking a still image, and to record a moving image on which tilt correction has been performed. Hereinafter, in this embodiment, the same code | symbol is attached | subjected to the thing of the same structure, and the description is abbreviate | omitted.

FIG. 5 is a flowchart illustrating the operation of the imaging apparatus according to the second embodiment.
The CPU 11 controls each unit so as to realize the operation shown in FIG. When the moving image mode is selected by operating the button of the operation unit 14 or the mode dial operation, the processing shown in FIG. 5 is started. The processing in step S201 and step S202 is the same as the processing in step S101 and S102 shown in FIG.

  In step S <b> 203, the CPU 11 detects the tilt angle of the imaging apparatus 10 using the shake / tilt detection unit 21. In step S204, the CPU 11 calculates tilt correction parameters of the image processing circuit 18, such as a correction amount in the image rotation process and a shift amount in the clipping process, so as to correct the tilt of the imaging device 10 detected in step S203.

  In step S205, the CPU 11 uses the image processing circuit 18 to perform image rotation processing and clipping processing on the image data generated in step S202, using the tilt correction parameter calculated in step S204. Thereby, image data in which the inclination of the image generated by the inclination of the imaging device 10 is corrected is generated. In step S206, the CPU 11 performs resize processing to the recording size using the image processing circuit 18 on the image data that has been tilt-corrected in step S205, and generates moving image compression data. Then, the generated moving image compression data is written into the DRAM 15.

  In step S207, the CPU 11 compresses the moving image compression data generated in step S206 in the MPEG or Motion JPEG format using the image compression / decompression circuit 19. In step S208, the CPU 11 temporarily stores the moving image data compressed in step S207 in the moving image buffer area on the DRAM 15. In step S209, the CPU 11 determines whether the release switch of the operation unit 14 is half-pressed (SW1), that is, whether there is a still image shooting preparation instruction. If there is no still image shooting preparation instruction (SW1) in step S209, the process proceeds to step S210. If there is a still image shooting preparation instruction (SW1), the process proceeds to step S211.

  In step S210, the CPU 11 uses the image processing circuit 18 on the image data generated in step S202 to perform image rotation processing and clipping processing using the tilt correction parameter calculated in step S204. Thereby, image data in which the inclination of the image generated by the inclination of the imaging device 10 is corrected is generated. In step S211, the CPU 11 performs a resizing process or the like to the display size using the image processing circuit 18 on the image data generated in step S202 or the image data subjected to the tilt correction in step S210. Generate image data. Then, the generated display image data is written into the DRAM 15.

  As described above, in the still image shooting preparation state by the half-press operation (SW1) of the release switch, a live view in which the horizontal correction function is disabled can be displayed, and the user can check the tilt state of the imaging device 10 in the live view. Perform display control. Furthermore, in the present embodiment, it is possible to record a moving image subjected to tilt correction even in a still image shooting preparation state by a half-press operation of a release switch. Since the process of step S212-step S217 is the same as the process of S111-step SS116 of FIG. 4, the description is abbreviate | omitted.

  As described above, according to the present embodiment, it is possible to display a live view in which the horizontal correction function is disabled in the still image shooting preparation state by the half-press operation (SW1) of the release switch. Accordingly, the user can check the tilt state of the imaging device 10 with a live view before taking a still image, and can record image data on which tilt correction has been performed as moving image data.

  Therefore, tilt correction is possible for movie shooting, and tilt correction is not possible for still image shooting.When shooting a still image in movie shooting mode to which tilt correction is applied, it is not intended. It is possible to prevent a tilted still image from being shot. Furthermore, image data that has been subjected to tilt correction can be recorded as moving image data that is recorded at that time.

(Third embodiment)
Next, an imaging apparatus according to a third embodiment of the present invention will be described. The configuration itself of the imaging apparatus 10 according to this embodiment is the same as that of the imaging apparatus according to the first embodiment and the second embodiment. Similar to the first embodiment, the imaging apparatus 10 according to the present embodiment has a horizontal correction function. Furthermore, in the imaging apparatus 10 according to the present embodiment, the image processing circuit 18 cuts and rotates the image in accordance with the angular shake of the imaging apparatus 10 detected by the shake / tilt detection unit 21 in moving image shooting. In addition, it has an electronic image stabilization function for correcting image blur due to angular shake.

  In order to electronically correct image blur due to tilt or angular shake, it is necessary to cut out a part of the image from the captured image, and the angle of view recorded with respect to the captured angle of view becomes narrow. For this reason, during still image shooting, it can be determined that the user has allowed the recorded angle of view to be narrowed in order to enable the horizontal correction function, and only when the video image stabilization function is disabled. The correction function shall be applied.

  In other words, when the electronic image stabilization function for moving images is enabled, it is determined that the angle of view is allowed to be narrowed due to the electronic image stabilization function, and the horizontal correction function during still image shooting is disabled. To do. When the horizontal correction function during still image shooting is disabled, the horizontal correction function for moving images is disabled in the still image shooting preparation state by the half-press operation (SW1) of the release switch. Thereby, the user can confirm the state of the inclination of the imaging device 10 in the live view before taking a still image.

FIG. 6 is a flowchart illustrating the operation of the imaging apparatus according to the third embodiment.
The CPU 11 controls each unit so as to realize the operation shown in FIG. When the moving image mode is selected by operating the button of the operation unit 14 or the mode dial operation, the processing shown in FIG. 6 is started. The processing in steps S301 and S302 is the same as the processing in steps S101 and S102 shown in FIG.

  In step S303, the CPU 11 determines whether the electronic image stabilization function for the moving image is valid. If it is determined in step S303 that the moving image electronic image stabilization function is enabled, the process proceeds to step S304. If the moving image electronic image stabilization function is determined to be disabled, the process proceeds to step S307. In step S <b> 304, the CPU 11 detects angular shake in the xyz axis direction of the imaging apparatus 10 using the shake / tilt detection unit 21.

  In step S305, the CPU 11 calculates angular shake correction parameters of the image processing circuit 18 such as a correction amount in the image rotation process and a shift amount in the clipping process so as to correct the angular shake of the imaging apparatus 10 detected in step S304. To do. In step S306, the CPU 11 uses the image processing circuit 18 on the image data generated in step S302 to perform image rotation processing and clipping processing using the angular shake correction parameter calculated in step S305. Thereby, image data in which the image blur due to the angular shake of the imaging device 10 is corrected is generated.

  In step S307, the CPU 11 determines whether the release switch of the operation unit 14 is half-pressed (SW1), that is, whether there is a still image shooting preparation instruction. If there is no still image shooting preparation instruction (SW1) in step S307, the process proceeds to step S309. If there is a still image shooting preparation instruction (SW1), the process proceeds to step S308. In step S308, the CPU 11 determines whether the electronic image stabilization function for the moving image is valid.

  If it is determined in step S308 that the electronic image stabilization function for the moving image is invalid, the process proceeds to step S309. If it is determined that the electronic image stabilization function for the moving image is valid, the process proceeds to step S312. In step S <b> 309, the CPU 11 detects the tilt angle of the imaging device 10 using the shake / tilt detection unit 21. In step S310, the CPU 11 calculates tilt correction parameters of the image processing circuit 18, such as a correction amount in the image rotation process and a shift amount in the clipping process, so as to correct the tilt of the imaging device 10 detected in step S309.

  In step S311, the CPU 11 performs the following processing using the image processing circuit 18 on the image data generated in step S302 or the image data subjected to image blur correction in step S306. That is, image rotation processing and clipping processing are performed using the tilt correction parameter calculated in step S310. Thereby, image data in which the inclination of the image generated by the inclination of the imaging device 10 is corrected is generated.

  As described above, in the still image shooting preparation state by the half-press operation (SW1) of the release switch, when the electronic image stabilization function of the moving image is valid, the horizontal correction function can be invalidated, and the user can change the tilt state of the imaging device 10. Control the display so that you can check it in Live View. In step S <b> 312, the CPU 11 performs resize processing to a recording size using the image processing circuit 18, generates moving image compression data, and writes the data to the DRAM 15. The image data input in step S312 is the image data generated in step S302, or image data that has been subjected to both or one of the angular shake correction in step S306 and the tilt correction in step S311.

  In step S313, the CPU 11 uses the image compression / decompression circuit 19 to compress the moving image compression data generated in step S312 in the MPEG or Motion JPEG format. In step S314, the CPU 11 temporarily stores the moving image data compressed in step S313 in the moving image buffer area on the DRAM 15.

  In step S <b> 315, the CPU 11 performs a resizing process or the like to the display size using the image processing circuit 18, generates display image data, and writes the display image data in the DRAM 15. As in step S312, the image data input in step S315 is the image data generated in step S302, or image data that has undergone both or one of the angular shake correction in step S306 and the tilt correction in step S311.

  With the generation of the display image data, the CPU 11 displays the display image data on the display unit 13 in step S316. That is, the live view display image on the display unit 13 is updated. In step S317, the CPU 11 determines whether the release switch of the operation unit 14 is fully pressed (SW2), that is, whether there is a still image shooting instruction. If it is determined in step S317 that there is no still image shooting instruction (SW2), the process returns to step S301, and the CPU 11 continues processing the next moving image frame. If there is a still image shooting instruction in step S317, the process proceeds to step S318.

  In step S <b> 318, the CPU 11 captures a still image frame using the imaging unit 17. In step S319, the CPU 11 uses the image processing circuit 18 to perform development processing, that is, white balance adjustment, pixel interpolation, and the like on the captured image data of the still image frame, and converts it into YUV data. Write to DRAM 15. In step S320, the CPU 11 determines whether or not the electronic image stabilization function of the moving image is valid, that is, whether or not the image cut-out process has been performed in step S306 for correcting the angle shake.

  If it is determined in step S320 that the electronic image stabilization function for the moving image is invalid, the process proceeds to step S321. If it is determined that the electronic image stabilization function for the moving image is valid, the process proceeds to step S322. In step S321, the CPU 11 performs image rotation processing and clipping processing on the developed image data generated in step S319 using the image processing circuit 18 with the inclination correction parameter calculated in step S311. Thereby, image data in which the inclination of the image generated by the inclination of the imaging device 10 is corrected is generated.

In step S322, the CPU 11 uses the image compression / decompression circuit 19 to compress and encode the developed image data generated in step S319 or the image data subjected to inclination correction in step S321 into still image data in JPEG format. Then, it writes in the DRAM 15.
In step S323, the CPU 11 records the JPEG format still image data compression-encoded in step S322 on the recording medium 20 via the recording medium I / F 16, and ends the shooting.

  As described above, according to the present embodiment, the electronic image stabilization function for moving images, which can be determined as allowing the user to narrow the angle of view recorded by enabling the horizontal correction function, is disabled. In some cases, the horizontal correction function is applied even during still image shooting. That is, tilt correction is also performed in still image shooting. Further, according to the present embodiment, in the still image shooting preparation state by the half-press operation (SW1) of the release switch, if the moving image electronic image stabilization function is enabled, the horizontal correction function is disabled and the user takes an image. The tilt state of the device 10 can be confirmed with a live view.

  Therefore, not only in the case of moving image shooting, but also in the case where electronic image stabilization of a moving image is disabled, tilt correction can be performed in still image shooting, and a horizontal image can be easily shot. In addition, when electronic video stabilization is enabled, that is, when tilt correction is not possible in still image shooting, and when shooting a still image in the movie shooting mode to which tilt correction is applied, it is not intended. It is possible to prevent a tilted still image from being shot.

  In the present embodiment, the inclination of steps S309 to S311 is set when the electronic image stabilization function for moving images is disabled regardless of whether the still image shooting preparation state is set by half-pressing the release switch. A correction was made. On the other hand, when the electronic image stabilization function for moving images is set to be effective, tilt correction is not performed in the still image shooting preparation state, and the moving image data recorded at this time is data that has not been tilt corrected. However, as in the second embodiment, the tilt correction may not be performed only on the live view display image data, and an image with the tilt correction may be generated on the moving image recording data.

  In that case, the process of step S307 and step S308 is not performed, and instead, the process of step S307 and S308 is performed between the processes of step S314 and S315, and the process similar to step S210 is performed instead of the process of step S315. Just do it.

(Fourth embodiment)
Next, an imaging device according to a fourth embodiment of the present invention will be described. The configuration itself of the imaging apparatus 10 according to the present embodiment is the same as that of the imaging apparatus according to the first to third embodiments. Similar to the first to third embodiments, the imaging apparatus 10 according to the present embodiment has a horizontal correction function. Furthermore, the imaging apparatus 10 according to the present embodiment has an electronic zoom function that realizes zooming by cutting out and enlarging a part from the image captured by the imaging unit 17.

  In order to electronically correct the tilt, it is necessary to cut out a part of the image from the captured image, and the angle of view recorded with respect to the captured angle of view becomes narrow. For this reason, at the time of still image shooting, the horizontal correction function is applied only when the electronic zoom that originally cuts out and uses a part of the shot image is used. That is, when the electronic zoom is not used, the horizontal correction function during still image shooting is invalid. For this reason, the moving image horizontal correction function is disabled in the still image shooting preparation state by the half-press operation (SW1) of the release switch. Thereby, the user can confirm the state of the inclination of the imaging device 10 in the live view before taking a still image.

FIG. 7 is a flowchart illustrating the operation of the imaging apparatus according to the fourth embodiment.
The CPU 11 controls each unit so as to realize the operation shown in FIG. When the moving image mode is selected by the button operation of the operation unit 14 or the mode dial operation, the processing shown in FIG. 7 is started. The processing in steps S401 through S403 is the same as the processing in steps S101 through S103 shown in FIG.

  If there is no still image shooting preparation instruction (SW1) in step S403, the process proceeds to step S405. If there is a still image shooting preparation instruction (SW1) in step S403, the process proceeds to step S404. In step S404, the CPU 11 determines whether or not the electronic zoom state is set. If it is determined in step S404 that the electronic zoom state is set, the process proceeds to step S405. If it is determined that the electronic zoom state is not set, the process proceeds to step S408. The processing in steps S405 to S407 is the same as the processing in steps S104 to S106 shown in FIG.

  In this way, in the still image shooting preparation state by the half-press operation (SW1) of the release switch, the horizontal correction function can be disabled except in the electronic zoom state, and the user can confirm the tilt state of the imaging device 10 in the live view. Control the display so that you can. In the electronic zoom state, the horizontal correction function during still image shooting is effective. The processing in steps S408 to S415 is the same as the processing in steps S107 to S114 shown in FIG.

  In step S416, the CPU 11 determines whether or not the electronic zoom state has been performed, that is, whether or not an electronic zoom process has been performed in which a part of the image captured by the imaging unit 17 is cut out and enlarged and recorded. If it is determined in step S416 that the electronic zoom state is set, the process proceeds to step S417. If it is determined that the electronic zoom state is not set, the process proceeds to step S418. In step S417, the CPU 11 performs image rotation processing and clipping processing on the image data after development generated in step S415 using the image processing circuit 18 with the inclination correction parameter calculated in step S406.

  Thereby, image data in which the inclination of the image generated by the inclination of the imaging device 10 is corrected is generated. In step S418, the CPU 11 uses the image compression / decompression circuit 19 to compress-encode the image data after development generated in step S415 or the image data subjected to inclination correction in step S417 into still image data in JPEG format. Then, it writes in the DRAM 15. In step S419, the CPU 11 records the JPEG format still image data compression-encoded in step S418 on the recording medium 20 via the recording medium I / F 16, and ends the shooting.

  As described above, according to the present embodiment, the horizontal correction function is applied even during still image shooting during electronic zoom that cuts out and uses a part of a captured image. That is, tilt correction is also performed in still image shooting. Further, according to the present embodiment, the horizontal correction is performed except in the electronic zoom state in which the horizontal correction function at the time of still image shooting is enabled in the still image shooting preparation state by the half-press operation (SW1) of the release switch. Disable the function. Thereby, the user can confirm the inclination state of the imaging device 10 by the live view.

  Accordingly, not only in the case of moving image shooting, but also in the electronic zoom state, tilt correction can be performed in still image shooting, and a horizontal image can be easily shot. In addition, in the case of still image shooting other than in the electronic zoom state, i.e., when tilt correction in still image shooting is not possible, and when shooting a still image in the movie shooting mode to which tilt correction is applied, It is possible to prevent an unintentionally tilted still image from being shot.

  In this embodiment, the tilt correction in steps S405 to S407 is performed in the electronic zoom state regardless of whether or not the still image shooting preparation state is obtained by half-pressing the release switch. On the other hand, if the electronic zoom state is not set, tilt correction is not performed in the still image shooting preparation state, and the moving image data recorded at this time is data that has not been tilt corrected. However, as in the second embodiment, the tilt correction may not be performed only on the live view display image data, and an image with the tilt correction may be generated on the moving image recording data.

  In that case, the process of step S403 and step S404 is not performed. Instead, the process of step S403 and S404 is performed between the process of step S410 and S411, and the process similar to step S210 is performed instead of the process of step S411. Just do it.

  In the first to fourth embodiments, when the release switch is half-pressed as a predetermined operation before a still image shooting instruction is issued, the still image shooting ready state is entered and the user Changed whether or not tilt correction is applied to the image to be checked in the view. However, the operation is not limited to this, and any predetermined operation may be performed.

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

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

10 Imaging device 11 CPU
DESCRIPTION OF SYMBOLS 13 Display part 14 Operation part 17 Imaging part 18 Image processing circuit 19 Image compression / decompression circuit 21 Shake / tilt detection part

Claims (9)

Inclination correction means for correcting the inclination of the image captured by the imaging means;
Display control means for controlling the display of the moving image on the display unit;
Determination means for determining whether or not a predetermined operation for entering a still image shooting preparation state has been performed,
The display control means includes
When it is determined that the predetermined operation has been performed, a moving image without correcting the tilt is displayed,
When it is determined that the predetermined operation has not been performed, control is performed so as to display a moving image with corrected inclination.
An imaging apparatus characterized by that. Generating means for generating an image for recording;
The generation unit generates an image in which the tilt of the image is corrected by the tilt correction unit as a moving image for recording.
The imaging apparatus according to claim 1. A shake correction means for electronically correcting image blur;
The display control means controls to display a moving image with corrected inclination when the correction by the shake correction means is invalid even when it is determined that the predetermined operation has been performed.
The imaging apparatus according to claim 2. If the correction by the shake correction unit is invalid when a still image shooting instruction is given, the generation unit generates a still image in which the tilt of the image is corrected by the tilt correction unit.
The imaging apparatus according to claim 3. Electronic zoom means for performing electronic zoom,
The display control means controls to display a moving image with corrected tilt when the electronic zoom means is zoomed even when it is determined that the predetermined operation has been performed.
The imaging apparatus according to claim 2. When zooming is performed by the electronic zoom unit when a still image shooting instruction is given, the generation unit generates a still image in which the tilt of the image is corrected by the tilt correction unit.
The imaging apparatus according to claim 5. The predetermined operation is that the release switch is half-pressed.
The image pickup apparatus according to claim 1, wherein the image pickup apparatus is an image pickup apparatus. A correction step of correcting the inclination of the image captured by the imaging means;
A display control process for controlling the display of the moving image on the display unit;
A determination step of determining whether or not a predetermined operation for entering a still image shooting preparation state has been performed,
When it is determined in the determination step that the predetermined operation has been performed, the display control step displays a moving image that does not correct the tilt,
When it is determined in the determination step that the predetermined operation has not been performed, the display control step displays a moving image with corrected inclination.
A control method characterized by that.   The program for functioning a computer as each means with which the said imaging device of any one of Claims 1 thru | or 7 is provided.