JP2018006803A - Imaging apparatus, control method for imaging apparatus, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate selection of a subject to be a focus object through a touch operation.SOLUTION: A digital camera 100 comprises: an imaging device 105 or the like for acquiring a subject image; a display device 110 including a touch panel 112 and a display part 111 for displaying the subject image; a touch panel control part 114 for detecting a touch operation and a touch pressure onto the display device 110; a subject detection part 107 for detecting subjects within a predetermined distance range around a touch position; a distance information generation part 108 for measuring a distance to the subject; a CPU 113 for selecting a subject to be focused from among the subjects detected by the subject detection part 107 in accordance with a magnitude of the detected touch pressure; and a lens control part 104 for focusing the subject selected by the CPU 113 based on the distance information that is acquired by the distance information generation part 108.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an imaging apparatus, an imaging apparatus control method, and a program, and more particularly, to an imaging apparatus including a touch panel capable of detecting a touch pressure.

  An imaging device such as a digital camera is provided with a display device such as a liquid crystal panel that displays a subject at the time of shooting, and a user (photographer) can perform a shooting operation while checking the screen of the display device. At the time of shooting, for example, multiple subjects existing in the depth direction overlap each other, such as a composition in which trees, leaves, flowers, and people appear in the foreground and mountains and buildings in the background appear in the background. It is often displayed on a display device. In such a case, a technique for assisting an operation performed by the user in order to focus on a desired subject selected by the user from among a plurality of subjects has been proposed. For example, Patent Document 1 proposes a technique for assisting selection of a subject to be focused by displaying contrast information on a screen of a display device in accordance with a user's lens operation.

Japanese Patent No. 4374574

  However, the technique described in Patent Document 1 is based on an imaging apparatus in which a user manually operates a lens. For this reason, the selection of the subject area that the user wants to focus on cannot be applied to an imaging apparatus that performs a touch operation with a fingertip or the like on the display apparatus.

  An object of the present invention is to provide a technique that facilitates selection by a touch operation of a subject to be focused.

  An imaging apparatus according to the present invention includes an acquisition unit that acquires a subject image, a touch panel, a display unit that displays the subject image acquired by the acquisition unit, and a touch detection unit that detects a touch operation on the display unit. A pressure detection means for detecting a touch pressure on the display means; a subject detection means for detecting a subject within a predetermined distance range centered on a touch position on the display means; and a subject detected by the subject detection means. A distance measuring means for measuring the distance, and a selecting means for selecting a subject to be focused from among the objects detected by the object detecting means according to the magnitude of the touch pressure detected by the pressure detecting means, Focuser that focuses on the subject selected by the selection means based on the distance information acquired by the distance measurement means Characterized in that it comprises a means.

  According to the present invention, even when a plurality of subjects are displayed on the screen of the display device, the subject to be focused can be easily selected by a touch operation on the screen of the display device.

1 is a block diagram illustrating a schematic configuration of a digital camera according to an embodiment of the present invention. It is the front view and back view which show the external appearance structure of a digital camera. 6 is a flowchart for describing processing for determining a subject to be focused upon when shooting with a digital camera. It is a figure explaining the distance map produced | generated in a digital camera. It is a figure explaining the to-be-photographed object detection process in step S304. It is a figure explaining the process which selects a focus object from the to-be-photographed object detected by step S304. It is a figure which shows the example of a display of the focus object determined by step S304. It is a flowchart explaining another imaging operation with a digital camera.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, a so-called digital camera is taken up as an imaging apparatus according to the present invention. However, the present invention is not limited to this, and can be applied to various electronic devices that have a display device such as a liquid crystal panel or an organic EL panel including a touch panel and have an imaging function using a photoelectric conversion element. . For example, the imaging apparatus according to the present invention can also be applied to various electronic devices such as a digital video camera, a smartphone, a mobile phone, a personal computer (tablet terminal, mobile terminal, etc.), and a game machine.

  FIG. 1 is a block diagram showing a schematic configuration of a digital camera 100 according to an embodiment of the present invention. The digital camera 100 includes a DRAM 101, a data bus 102, a lens unit 103, a lens control unit 104, an image sensor 105, a camera signal processing unit 106, a subject detection unit 107, a distance information generation unit 108, a display control unit 109, and a display device 110. Prepare. The display device 110 includes a display unit 111 and a touch panel 112. The digital camera 100 also includes a CPU 113, a touch panel control unit 114, an operation unit 115, a program bus 116, a ROM 117, a RAM 118, a control bus 119, and a media IF unit 120. A storage medium 150 such as a memory card (semiconductor storage device) can be attached to and detached from the digital camera 100.

  The DRAM 101 is a main memory of the digital camera 100, and temporarily stores image data and the like. The data bus 102 is a transmission path for accessing the DRAM 101. The lens unit 103 includes a zoom lens, a focus lens, an image blur correction lens, a diaphragm, and the like that form a photographing optical path for photographing a subject. Light that has passed through the lens unit 103 is transmitted to the image sensor 105 as an optical image of the subject. Form an image. The lens control unit 104 controls the operation of the lens unit 103, and performs angle adjustment by driving the zoom lens, autofocus by driving the focus lens, and the like. The imaging element 105 is a photoelectric conversion element such as a CCD sensor or a CMOS sensor that converts an optical image formed into an analog electric signal. The image sensor 105 is embedded with a phase difference detection sensor that divides and captures a signal of each pixel on the imaging surface, and is configured to output a phase difference signal for each pixel. In this embodiment, the image sensor 105 has an A / D converter, converts an analog electric signal generated by photoelectric conversion into digital data (image data) by A / D conversion, and temporarily stores it in the DRAM 101. It is assumed that it can be stored.

  The camera signal processing unit 106 is an image processing unit that performs various types of image processing such as noise reduction processing, development processing, image correction processing, resizing, and the like on the image data temporarily stored in the DRAM 101. The imaging data (image data) after the image processing by the camera signal processing unit 106 is performed is written in the storage medium 150 through the DRAM 101 or directly through the media IF unit 120. The subject detection unit 107 detects a subject based on the image data generated by the camera signal processing unit 106. Note that a well-known technique can be used for the subject detection method, and a detailed description thereof is omitted here. The distance information generation unit 108 measures the distance from the digital camera 100 to the subject detected by the subject detection unit 107 based on the phase difference signal acquired by the image sensor 105 (phase difference detection sensor incorporated in the image sensor 105). This is a distance measuring means for generating distance information.

  The CPU 113 implements the overall operation and control of the digital camera 100 by developing the computer program stored in the ROM 117 via the program bus 116 to the RAM 118 and controlling the operation of each part constituting the digital camera 100. . The ROM 117 stores various computer programs executed by the CPU 113, parameters, and the like. The RAM 118 functions as a work memory for the CPU 113. The control bus 119 is a transmission path for the CPU 113 to communicate with each unit constituting the digital camera 100. Note that overall control of the digital camera 100 may be performed by a dedicated processor such as an ASIC that implements all or part of the processing of each unit constituting the digital camera 100 by a logic circuit. Similarly, the camera signal processing unit 106, the subject detection unit 107, the distance information generation unit 108, and the like can be implemented by software (program) or hardware, and can be implemented by a combination of software and hardware. It may be.

  The display control unit 109 reads the image data temporarily stored in the DRAM 101 and outputs it to the display unit 111. The display unit 111 is a flat panel such as a liquid crystal panel or an organic EL panel, and displays image data acquired through the display control unit 109 (subject image obtained through the lens unit 103). The display control unit 109 has a function of highlighting an arbitrary area of image data displayed on the display unit 111 and displaying the highlighted area on the display unit 111. The touch panel 112 receives a touch operation from the user. The touch panel 112 is superimposed on the display unit 111.

  The touch panel control unit 114 detects at least the following operations based on the input to the touch panel 112. The touch panel control unit 114 functions as a touch detection unit that detects that a touch operation with a finger, a pen, or the like (hereinafter referred to as a “finger”) is performed on the touch panel 112. Specifically, the touch panel control unit 114 detects a touch-down in which a finger or the like touches the touch panel 112 and a touch-up in which the touched finger or the like leaves the touch panel 112. The touch panel control unit 114 also functions as a pressure detection unit that detects a touch pressure on the touch panel 112 every predetermined time when a finger or the like is in contact with the touch panel 112 (hereinafter referred to as “touch-on”). There is no limit on the duration of touch-on (time from touchdown to touchup). The touch panel control unit 114 further functions as a pressure detection unit that detects the area of a finger or the like that touches the touch panel 112 and acquires the touch pressure based on the detected area. Techniques and products that use the touch area as a touch pressure when a finger or the like touches the touch panel 112 are well known, and thus the description thereof is omitted here. In the present embodiment, the maximum value of the touch pressure that can be detected by the touch panel control unit 114 is “Fmax”. The operation and touch pressure detected by the touch panel control unit 114 are notified to the CPU 113 through the control bus 119.

  Further, the touch panel control unit 114 can detect a move (drag) that is an operation of moving a finger or the like on the touch panel 112. The touch panel control unit 114 changes the coordinates of the touch position (touch point) (hereinafter referred to as “touch coordinates”) for the movement direction of the finger or the like moving on the touch panel 112 in each of the vertical direction and the horizontal direction on the touch panel 112. Can be determined based on Note that the touch panel control unit 114 can also detect operations generally referred to as flicking, pinching out, and the like, but in the present embodiment, these operations are directly used to determine a subject to be focused. Because there is no, explanation here is omitted.

  The program bus 116 is a transmission path that connects the CPU 113, the ROM 117, the RAM 118, and the operation unit 115. The operation unit 115 is a button or a cross key for the user to instruct the operation of the digital camera 100. The media IF unit 120 is an interface for reading the image data temporarily held in the DRAM 101 and writing it to the storage medium 150, and conversely reading the image data stored in the storage medium 150 to the DRAM 101.

  FIG. 2 is a diagram for simply explaining the external configuration of the digital camera 100, FIG. 2 (a) is a front view, and FIG. 2 (b) is a rear view. A lens unit 103 is disposed in front of the housing (body) of the digital camera 100. A shutter button 201, a power button (not shown), and the like are disposed on the top surface of the housing. A cross key 202 and a display screen 203 are arranged on the back of the housing. The display screen 203 is obtained by superimposing the touch panel 112 on the display unit 111. When the user performs a touch operation on a subject or the like displayed on the display screen 203 with a finger or the like, the touch operation is detected by the touch panel control unit 114 through the touch panel 112.

  FIG. 3 is a flowchart for explaining processing for determining a subject to be focused on when the digital camera 100 performs shooting. Each process shown in the flowchart of FIG. 3 is realized by the CPU 113 developing the program stored in the ROM 117 in the RAM 118 and controlling the operation of each unit constituting the digital camera 100.

  In step S301, the CPU 113 displays a live view video that is a subject image on the display unit 111 (display screen 203). Specifically, when light incident through the lens unit 103 forms an optical image on the image sensor 105, the image sensor 105 converts the optical image into image data that is digital data, and the generated image data is temporarily stored in the DRAM 101. Saved. The imaging data temporarily stored in the DRAM 101 is read out by the camera signal processing unit 106, subjected to image processing by the camera signal processing unit 106, and temporarily stored in the DRAM 101 as image data. The image data temporarily stored in the DRAM 101 is read by the display control unit 109, and the display control unit 109 performs D / A conversion or the like and outputs it to the display unit 111. As a result, the subject image is displayed on the display unit 111. In step S301, it is desirable that the lens control unit 104 controls the aperture of the lens unit 103 to a predetermined set value so that the subject image is pan-focused under the control of the CPU 113. Further, the process of step S301 is performed every predetermined time from the start of photographing, thereby obtaining a temporally continuous subject image.

  In step S <b> 302, the CPU 113 determines whether there is a touch operation on the touch panel 112. For example, the CPU 113 receives a touchdown detection signal from the touch panel control unit 114 and determines that a touch operation such as a finger on the touch panel 112 has been performed. When the touch operation is detected, the touch panel control unit 114 notifies the CPU 113 of the touch coordinates (X1, Y1) and the touch pressure F1 in addition to the touchdown detection signal. Then, the CPU 113 stores the touch coordinates (X1, Y1) and the touch pressure F1 notified from the touch panel control unit 114 in the RAM 118. CPU 113 waits until a touch operation is detected (NO in S302), and when a touch operation is detected (YES in S302), the process proceeds to step S303.

  In step S303, the CPU 113 instructs the distance information generation unit 108 to generate distance information. The distance information generation unit 108 generates distance information (distance map) of the subject image based on the phase difference signal acquired by the image sensor 105, and stores it in the DRAM 101 in association with the image data temporarily stored in the DRAM 101. The CPU 113 acquires a distance map stored in the DRAM 101.

  Here, the distance information generation processing by the distance information generation unit 108 will be described. FIG. 4A is a diagram schematically showing a positional relationship (distance relationship) between the digital camera 100 and the subjects 410, 411, and 412. The distances from the digital camera 100 to the subjects 410, 411, 412 are distances L1, L2, L3 (L1 <L2 <L3). Since the image sensor 105 can acquire phase difference information for autofocus (AF) in units of pixels as described above, the distance information generation unit 108 uses the object based on the phase difference information acquired from the image sensor 105. Distance information is generated with a predetermined resolution. In addition, since a known technique can be used for the method of generating distance information by detecting the imaging surface phase difference, detailed description thereof is omitted here.

  FIG. 4B is a diagram illustrating a distance map 400 that represents the relationship between the subjects 410, 411, and 412 and the distances L1 and L2 as two-dimensional image information, and an indicator 405 corresponding to the distance map 400. In the distance map 400, the distance from the digital camera 100 to the subject is replaced with the density of the image. Note that a large number of substantially rectangular sections schematically shown in the distance map 400 may correspond to one pixel of the image sensor 105 or may correspond to a plurality of pixels. Here, the color of the area where the subject is present is expressed in light color as it approaches the digital camera 100, and is expressed in dark color as it moves away from the digital camera 100. In FIG. 4B, subjects 410, 411, and 412 correspond to distance data 420, 421, and 422, respectively, and subject 410 is at the closest position to digital camera 100, and subject 412 is from digital camera 100. It can be seen that it is at the farthest position.

  An indicator 405 indicates the relationship between the distance from the digital camera 100 to the subject and the shading in the distance map 400. During the processing according to the flowchart of FIG. 3, the distance map 400 and the indicator 405 are not actually displayed on the display screen 203 (display unit 111). The display format of the distance map is not limited to this, and it is only necessary to know the distance relationship (perspective relationship) of a plurality of subjects from the digital camera 100.

  Returning to the flowchart of FIG. In step S304, based on the touch coordinates (X1, Y1) stored in the RAM 118, the CPU 113 instructs the subject detection unit 107 to detect a subject within a predetermined distance range determined in advance from the touch coordinates. The subject detection unit 107 detects a subject existing within a predetermined distance range from the touch coordinates (X1, Y1) using the distance map 400 generated by the distance information generation unit 108 and stored in the DRAM 101 in step S303. .

  Here, subject detection processing by the subject detection unit 107 will be described. FIG. 5A is a diagram showing a live view video displayed on the display screen 203 (display unit 111). It is assumed that the subjects 501, 502, and 503 are shown on the display screen 203, and the point A is detected as touch coordinates (X1, Y1) by the user's finger or the like. FIG. 5B is a diagram illustrating a distance map 500 and an indicator 405 corresponding to FIG. Regions 501a, 502a, and 503a shown in the distance map 500 correspond to the subjects 501, 502, and 503, respectively. The distance map 500 is generated in step S304 and stored in the DRAM 101. As shown in FIG. 5A, when the point A is detected as the touch coordinates (X1, Y1), the subject detection unit 107 has the subject within the predetermined distance range P from the point A with the point A as the center. Is detected. A region Pa on the distance map 500 shown in FIG. 5B corresponds to the distance range P in the display screen 203 of FIG.

  The subject detection unit 107 analyzes the distance information in the area Pa, and counts the number of distance data in ascending order from the minimum value to the maximum value. The number of the distance data is to detect how many substantially square sections corresponding to each distance range in the distance map 500. FIG. 6A is a diagram illustrating an analysis result of distance information in the region Pa. FIG. 6B is a frequency distribution diagram that is a schematic representation of FIG. The subject detection unit 107 detects a subject existing in the area Pa based on the frequency distribution diagram. FIG. 6C is a diagram illustrating a result of the association processing between the distance data and the subject by the subject detection unit 107. Here, the subjects 501 and 502 are detected as subjects within the distance range P (area Pa).

  Returning to the flowchart of FIG. In step S305, the CPU 113 functions as a subject selection unit, and selects a subject to be focused (focused). Specifically, based on the number of subjects detected by the subject detection unit 107 in step S304, the CPU 113 detects subjects within the distance range P detected by the touch panel control unit 114 in the distance range P detected in step S304. Divide equally by the number of. Then, the CPU 113 associates the pressure range of the touch pressure with the focus target subject. FIG. 6D is a diagram illustrating a result of associating the touch pressure with the subject with respect to the distance range P. When the number of subjects detected by the subject detection unit 107 is N (N is a natural number), the maximum value Fmax is divided into N. When the number of subjects detected by the subject detection unit 107 is two as shown in FIG. 6C, the touch pressure and the subject are associated by dividing the maximum value Fmax into two.

  The CPU 113 selects the subject to be focused with reference to the touch pressure acquired by the touch panel control unit 114 and the information in FIG. For example, when the touch pressure F1 detected in step S302 is 0 <F1 <Fmax / 2, the subject 501 is selected as the subject to be focused. FIG. 7 is a diagram illustrating an example of the display screen 203 when the subject 501 is selected as a focus target. Under the control of the CPU 113, the display control unit 109 distinguishes the subject 501 from the subject 502 and performs highlighting such as displaying a predetermined color or the like superimposed on the subject 501 (changing the color of the subject 501). As a result, the user can easily recognize the subject that is the focus target. Note that the highlighted display of the subject that is the focus target is not limited to the color change, and may be, for example, edge enhancement. Further, here, when the touch pressure is small, a subject close to the digital camera 100 is selected as a focus target. However, on the contrary, a subject close to the digital camera 100 may be selected as a focus target when the touch pressure is large.

  In step S306, the CPU 113 determines whether or not the number of subjects detected in step S304 is greater than one. If the number of subjects is 1 or less (NO in S306), the CPU 113 proceeds the process to step S308, and if the number of subjects is greater than 1 (YES in S306), the process proceeds to step S307. When the number of subjects is one, the change in touch pressure (step S307) is not considered. This is because when the number of subjects is one, the subject to be focused does not change unless the touch position changes. Therefore, when the number of subjects is one, it is only necessary to determine whether or not the touch position has changed, and thus the process proceeds to step S308.

  In step S <b> 307, the CPU 113 determines whether or not the touch pressure has changed based on the notification of the touch pressure at the touch position from the touch panel control unit 114. Note that the touch panel control unit 114 detects the touch pressure at the touch position every predetermined time when the touch is turned on, and notifies the CPU 113 of the detection result. The CPU 113 monitors the touch pressure based on the notification of the touch pressure from the touch panel control unit 114. As described above, since the change in the touch pressure is detected by the change in the touch area, for example, when the finger is strongly pressed against the display screen 203, it is determined that the touch pressure is increased by increasing the touch area. When the touch pressure changes (YES in S307), the CPU 113 updates the touch pressure F1 stored in the RAM 118 to the touch pressure F2, and returns the process to step S305. For example, when the relationship of 0 <F1 <Fmax / 2 is changed to the relationship of Fmax / 2 <F2 <Fmax, the focus target is changed from the subject 501 to the subject 502 in step S305 after returning from step S307. In this case, the highlight target described with reference to FIG. 7 is also changed from the subject 501 to the subject 502. On the other hand, if the touch pressure does not change (NO in S307), the CPU 113 advances the process to step S308.

  In step S <b> 308, the CPU 113 determines whether the touch position has changed based on the coordinate information (touch coordinates) of the touch position from the touch panel control unit 114. Note that the touch panel control unit 114 detects a touch position every predetermined time and notifies the CPU 113 of the detection result (touch coordinates). CPU113 returns a process to step S303, when the coordinate of a touch position changes (it is YES at S308), and when a coordinate of a touch position does not change (it is NO at S308), a process is advanced to step S309.

  In step S <b> 309, the CPU 113 determines whether touch-up has been detected based on the coordinate information of the touch position from the touch panel control unit 114. If the touch-up is not detected (NO in S309), the process returns to step S306, and if the touch-up is detected (YES in S309), the process proceeds to step S310. In step S310, the CPU 113 determines the subject selected in the latest step S306 as the subject to be focused. In step S311, the lens control unit 104 drives the lens unit 103 under the control of the CPU 113 to focus the subject determined as the focus target in step S310, thereby ending this processing.

  In the digital camera 100, a shooting operation is performed after step S311. After the lens unit 103 is controlled, shooting is performed by the imaging element 105, and the generated image data is written to the storage medium 150 via the DRAM 101 and the media IF unit 120 or directly via the media IF unit 120. . As described above, in the digital camera 100, the subject to be focused is selected according to the touch pressure, so that the subject to be focused can be reliably determined even when a plurality of subjects overlap.

  Next, another process for determining a subject to be focused on when the digital camera 100 performs a shooting operation with the digital camera 100 will be described. FIG. 8 is a flowchart of another process for determining a subject to be focused on when the digital camera 100 performs a shooting operation. The processes in steps S801 to S804 shown in the flowchart of FIG. 8 are the same as the processes in steps S301 to S304 shown in the flowchart of FIG. In step S805, the CPU 113 determines whether or not the touch pressure F1 detected in step S802 and stored in the RAM 118 is greater than or equal to a predetermined value. Note that the threshold value F0 as the predetermined value is determined in a range of 0 to Fmax.

  If the touch pressure F1 is greater than or equal to the threshold F0 (F1 ≧ F0, YES in S805), the CPU 113 advances the process to step S806, and if the touch pressure F1 is less than the threshold F0 (F1 <F0, NO in S805). The process proceeds to step S807. In step S806, the CPU 113 selects the farthest subject as the focus target based on the table in which the distance data and the subject described with reference to FIG. On the other hand, in step S807, the CPU 113 selects the closest subject as the focus target based on the table in which the distance data and the subject described with reference to FIG. Therefore, when the user wants to focus on a distant subject, the user may touch the display screen 203 with a large area. When the user wants to focus on a near subject, the user touches the display screen 203 with a small area. That's fine. In this way, by selecting a subject to be focused on based on the magnitude of the touch pressure F1 detected first when there is a touchdown, it is possible to efficiently select the subject to be focused. And it can be done easily. Since the processing in steps S808 to S813 is the same as the processing in steps S306 to S311 in the flowchart of FIG. 3, the description thereof is omitted here. By performing the processing in steps S808 to 813, for example, even when there are three or more subjects within the distance range P from the touch position, the subject between the nearest subject and the farthest subject is focused. Can be easily selected as a subject to be matched.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. For example, in the process of step S307, the touch panel control unit 114 may determine whether or not the touch pressure at the touch position has changed in place of the CPU 113. In this case, the CPU 113 may be configured to advance the process upon receiving a notification of the determination result from the touch panel control unit 114. Similarly, the touch panel control unit 114 may determine the processes in steps S308 and S309. The above-described method for determining a subject to be focused can be applied to a scene in which a focus target is determined at the time of moving image shooting.

  In addition, the digital camera 100 described in the above embodiment has a structure in which an imaging unit that images a subject and a main body unit that performs various processes based on information obtained by the imaging unit are integrated. The part and the body part may be separate. As an imaging device in which the imaging unit and the main unit are separate, a surveillance camera or the like can be cited. In this case, the imaging unit and the main unit are communicably connected by wired communication or wired communication. Of the components of the digital camera 100, the imaging unit may include at least the lens unit 103, the lens control unit 104, and the imaging element 105, and the main unit may include other components. 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 the 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.

DESCRIPTION OF SYMBOLS 100 Digital camera 104 Lens control part 105 Image pick-up element 106 Camera signal processing part 107 Subject detection part 108 Distance information generation part 109 Display control part 110 Display apparatus 111 Display part 112 Touch panel 113 CPU
114 Touch panel control unit

Claims (10)

Acquisition means for acquiring a subject image;
Display means for displaying a subject image acquired by the acquisition means, including a touch panel;
Touch detection means for detecting a touch operation on the display means;
Pressure detecting means for detecting a touch pressure on the display means;
Subject detection means for detecting a subject within a predetermined distance range centered on a touch position with respect to the display means;
Distance measuring means for measuring the distance to the subject detected by the subject detecting means;
A selection unit that selects a subject to be focused from among the subjects detected by the subject detection unit according to the magnitude of the touch pressure detected by the pressure detection unit;
An imaging apparatus comprising: focusing means for focusing on a subject selected by the selection means based on distance information acquired by the distance measuring means. When a plurality of subjects are detected within the distance range by the subject detection means, a pressure range is obtained by equally dividing the maximum value of the touch pressure that can be detected by the pressure detection means by the number of the plurality of subjects, An associating means for associating the equally divided pressure range with the plurality of subjects;
The selection unit selects a subject associated with a pressure range including a touch pressure detected by the pressure detection unit from among the equally divided pressure ranges as a subject to be focused. The imaging device described.   The selection unit is configured to select a subject within the distance range when the touch pressure detected by the pressure detection unit when the touch detection unit detects a touch operation on the display unit is a predetermined value or more. 2. The imaging according to claim 1, wherein when the subject is farthest away, the subject closest to the subject within the distance range is selected as the subject to be focused when the subject is not equal to or greater than the predetermined value. apparatus.   The imaging apparatus according to any one of claims 1 to 3, further comprising highlight display means for highlighting and displaying the subject selected as the subject to be focused by the selection means on the display means.   5. The imaging apparatus according to claim 1, wherein the pressure detection unit detects a touch pressure based on a touch area in a touch operation on the display unit.   The focus means focuses an object selected as an object to be focused by the selection means when the touch detection means detects a touch-up from the display means as the touch operation. Item 6. The imaging device according to any one of Items 1 to 5. A method for controlling an imaging apparatus,
An acquisition step of acquiring a subject image;
A display step of displaying the subject image acquired in the acquisition step on a display device having a touch panel;
A touch detection step of detecting a touch operation on the display device;
A pressure detection step of detecting a touch pressure on the display device;
A subject detection step of detecting a subject within a predetermined distance range centered on a touch position on the display device;
A distance measuring step for measuring the distance to the subject detected in the subject detecting step;
A selection step of selecting a subject to be focused from among the subjects detected in the subject detection step according to the magnitude of the touch pressure detected in the pressure detection step;
And a focusing step of focusing on the subject selected in the selection step based on the distance information acquired in the ranging step.   In the selection step, if the touch pressure detected in the pressure detection step when a touch operation on the display device is detected is equal to or greater than a predetermined value, the subject that is farthest among the subjects within the distance range 8. The method of controlling an imaging apparatus according to claim 7, wherein if the distance is not equal to or greater than the predetermined value, the closest subject among the subjects within the distance range is selected as the subject to be focused.   The program for making a computer perform each step of the control method of Claim 7 or 8. An imaging device comprising: an imaging unit that captures an image of a subject; and a main body unit that is communicably connected to the imaging unit via wired communication or wired communication, and the imaging unit and the main body unit are separate bodies,
The main body is
A display unit including a touch panel and displaying a subject image acquired by the imaging unit;
Touch detection means for detecting a touch operation on the display means;
Pressure detecting means for detecting a touch pressure on the display means;
Subject detection means for detecting a subject within a predetermined distance range centered on a touch position with respect to the display means;
Distance measuring means for measuring the distance to the subject detected by the subject detecting means;
Selection means for selecting a subject to be focused from among the subjects detected by the subject detection means according to the magnitude of the touch pressure detected by the pressure detection means;
The imaging unit
An imaging apparatus comprising: a focusing unit that focuses on a subject selected by the selection unit based on distance information acquired by the ranging unit.