JP6679430B2 - IMAGING DEVICE, IMAGING DEVICE CONTROL METHOD, AND PROGRAM - Google Patents

Description

  The present invention relates to an image pickup apparatus, a method for controlling the image pickup apparatus, and a program, and particularly to an image pickup apparatus including a touch panel capable of detecting 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. When shooting, for example, the branches and leaves of trees and flowers, people are reflected in the foreground, and at the same time the background of mountains, buildings, etc. is reflected in the back, and multiple subjects existing in the depth direction overlap. Often displayed on a display device. In such a case, there has been proposed a technique for assisting an operation performed by a user in order to focus on a desired subject selected by the user from a plurality of subjects. For example, Patent Document 1 proposes a technique of displaying contrast information on the screen of a display device according to a user's lens operation to assist selection of a subject to be focused.

Japanese Patent No. 4374574

  However, the technique described in Patent Document 1 is premised on an imaging device in which a user manually operates a lens. Therefore, it cannot be applied to an image pickup apparatus in which the user selects a subject area to be focused by a touch operation with a fingertip or the like on the display apparatus.

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

  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 detecting means for detecting a touch pressure on the display means, a subject detecting means for detecting a subject within a predetermined distance range around a touch position on the display means, and a subject detected by the subject detecting means Distance measuring means for measuring the distance, and selecting means for selecting a subject to be focused from among the subjects detected by the subject detecting means according to the magnitude of the touch pressure detected by the pressure detecting means, A focus that focuses on the subject selected by the selecting means based on the distance information acquired by the distance measuring means. Characterized in that it comprises a means.

  According to the present invention, even when a plurality of subjects are displayed in an overlapping manner on the screen of the display device, it is possible to easily select the subject to be focused by a touch operation on the screen of the display device.

It is a block diagram showing a schematic structure of a digital camera concerning an embodiment of the present invention. It is the front view and rear view which show the external appearance constitution of the digital camera. 6 is a flowchart illustrating a process of determining a subject to be focused when shooting with a digital camera. It is a figure explaining the distance map 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. 9 is a flowchart illustrating another shooting operation of the 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 image pickup apparatus according to the present invention. However, the present invention is not limited to this, and can be applied to various electronic devices having a display device such as a liquid crystal panel or an organic EL panel having a touch panel and having an imaging function by a photoelectric conversion element. . For example, the imaging device according to the present invention can be applied to various electronic devices such as a digital video camera, a smart phone, 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 the embodiment of the present invention. The digital camera 100 includes a DRAM 101, a data bus 102, a lens unit 103, a lens controller 104, an image sensor 105, a camera signal processor 106, a subject detector 107, a distance information generator 108, a display controller 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, an aperture, and the like that form a shooting optical path for shooting a subject, and the 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 adjusts the angle of view by driving the zoom lens and performs autofocus by driving the focus lens. The image pickup element 105 is a photoelectric conversion element such as a CCD sensor or a CMOS sensor that converts the formed optical image into an analog electric signal. The image sensor 105 is embedded with a phase difference detection sensor that divides and captures the signal of each pixel on the imaging surface, and is configured to be able to output the phase difference signal for each pixel. In the present embodiment, the image sensor 105 has an A / D converter, converts an analog electric signal generated by photoelectric conversion into digital data (imaging data) by A / D conversion, and temporarily stores it in the DRAM 101. It shall be configured so that it can be saved.

  The camera signal processing unit 106 is an image processing unit that performs various image processing such as noise reduction processing, development processing, image correction processing, and resizing on the imaged data temporarily stored in the DRAM 101. The imaging data (image data) after the image processing by the camera signal processing unit 106 is written to the storage medium 150 via the DRAM 101 or directly via 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. A known technique can be used for the method of detecting the subject, and detailed description thereof will be 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 (the phase difference detection sensor incorporated therein), It is a distance measuring unit that generates distance information.

  The CPU 113 realizes the overall operation and control of the digital camera 100 by expanding the computer program stored in the ROM 117 into the RAM 118 via the program bus 116 and controlling the operation of each unit 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 or the like of the CPU 113. The control bus 119 is a transmission path for the CPU 113 to communicate with each unit that constitutes the digital camera 100. Note that the 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 configuring 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 are implemented by a combination of software and hardware. 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 (video of a subject obtained through the lens unit 103). The display control unit 109 has a function of emphasizing an arbitrary area of the 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 a user. The touch panel 112 is superposed 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 is performed on the touch panel 112 with a finger, a pen, or the like (hereinafter referred to as “finger or the like”). Specifically, the touch panel control unit 114 detects touch-down in which a finger or the like touches the touch panel 112 and touch-up in which the touched finger or the like separates from the touch panel 112. The touch panel control unit 114 also functions as a pressure detection unit that detects the touch pressure on the touch panel 112 at predetermined intervals when the 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 touch-down to touch-up). The touch panel control unit 114 further functions as, for example, a pressure detection unit that detects the area of a finger or the like touching the touch panel 112 and acquires the touch pressure based on the detected area. Techniques and products that use the touch area when the touch panel 112 is touched by a finger or the like as the touch pressure are well known, so description thereof will be omitted here. In the present embodiment, the maximum value of the touch pressure that the touch panel control section 114 can detect 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.

  In addition, the touch panel control unit 114 can detect a move (drag), which is an operation of moving a finger or the like on the touch panel 112. The touch panel control unit 114 changes coordinates of touch positions (touch points) (hereinafter, referred to as “touch coordinates”) in the moving direction of a 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 actions generally referred to as flicks, pinch-outs, etc., but in the present embodiment, these actions are directly used to determine the subject to be focused. Since it does not exist, the description is omitted here.

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

  2A and 2B are diagrams for briefly explaining the external configuration of the digital camera 100. FIG. 2A is a front view and FIG. 2B is a rear view. A lens unit 103 is arranged on the front surface of the housing of the digital camera 100. A shutter button 201, a power button (not shown), and the like are arranged on the upper surface of the housing. A cross key 202 and a display screen 203 are arranged on the back surface of the housing. The display screen 203 is one in which the touch panel 112 is superimposed 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 illustrating a process of determining a subject to be focused on when shooting with the digital camera 100. Each process shown in the flowchart of FIG. 3 is realized by the CPU 113 loading the program stored in the ROM 117 into 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 image that is a subject image on the display unit 111 (display screen 203). Specifically, when the 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 digital image 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 by the camera signal processing unit 106, then image-processed 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, under the control of the CPU 113, controls the aperture of the lens unit 103 to a predetermined set value so that the subject image becomes a pan focus. In addition, the process of step S301 is performed every predetermined time from the start of shooting, whereby a subject image that is temporally continuous is obtained.

  In step S302, the CPU 113 determines whether or not there is a touch operation on the touch panel 112. For example, the CPU 113 determines that there is a touch operation such as a finger on the touch panel 112 by receiving a touchdown detection signal from the touch panel control unit 114. 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. The CPU 113 waits until a touch operation is detected (NO in S302), and when the touch operation is detected (YES in S302), advances the process 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 the 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 the positional relationship (distance relationship) between the digital camera 100 and the subjects 410, 411, 412. The respective 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 the phase difference information for autofocus (AF) on a pixel-by-pixel basis as described above, the distance information generation unit 108 sets the subject based on the phase difference information acquired from the image sensor 105. Distance information up to is generated with a predetermined resolution. A well-known technique can be used for the method of generating the distance information by detecting the phase difference of the imaging plane, and thus the 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 shading of the image. Note that a large number of substantially rectangular one 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 in which the subject is present is represented by a light color as it gets closer to the digital camera 100, and as a color as it gets farther from the digital camera 100. In FIG. 4B, the subjects 410, 411, and 412 correspond to the distance data 420, 421, and 422, respectively, the subject 410 is closest to the digital camera 100, and the subject 412 is from the digital camera 100. You can see that it is in the farthest position.

  The indicator 405 indicates the relationship between the distance from the digital camera 100 to the subject and the shade in the distance map 400. During the process 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 the distance relationship (distance relationship) between the plurality of subjects from the digital camera 100 may be known.

  Returning to the description of the flowchart in FIG. In step S304, 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, based on the touch coordinates (X1, Y1) stored in the RAM 118. The subject detecting 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 generating unit 108 and stored in the DRAM 101 in step S303. .

  Here, the subject detection processing by the subject detection unit 107 will be described. FIG. 5A is a diagram showing a live view image displayed on the display screen 203 (display unit 111). It is assumed that the subjects 501, 502, and 503 are reflected on the display screen 203, and that the point A is detected as touch coordinates (X1, Y1) by the finger or the like of the user. FIG. 5B is a diagram showing the distance map 500 and the indicator 405 corresponding to FIG. Areas 501a, 502a, 503a shown in the distance map 500 correspond to the subjects 501, 502, 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 touch coordinates (X1, Y1), the subject detecting unit 107 causes the subject within the predetermined distance range P from the point A to be the center. To detect. The area Pa on the distance map 500 shown in FIG. 5B corresponds to the distance range P in the display screen 203 of FIG. 5A.

  The subject detection unit 107 analyzes the distance information in the area Pa, and totalizes the number of distance data in ascending order from the minimum value to the maximum value of the distance. The number of distance data will detect how many substantially square sections corresponding to each distance range are present in the distance map 500. FIG. 6A is a diagram showing an analysis result of the distance information within the area Pa. FIG. 6B is a frequency distribution diagram in which FIG. 6A is schematically illustrated. The subject detection unit 107 detects a subject existing in the area Pa based on the frequency distribution chart. FIG. 6C is a diagram showing a result of the process of associating the distance data with the subject by the subject detection unit 107. Here, the subjects 501 and 502 are detected as subjects within the distance range P (region Pa).

  Returning to the description of the flowchart in FIG. In step S305, the CPU 113 functions as a subject selection unit and selects a subject to be focused (focused). Specifically, the CPU 113 determines, based on the number of subjects detected by the subject detection unit 107 in step S304, the maximum value Fmax of the touch pressure that can be acquired by the touch panel control unit 114 within 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 subject to be focused. FIG. 6D is a diagram showing a result of associating the touch pressure with the subject in 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 refers to the touch pressure acquired by the touch panel control unit 114 and the information in FIG. 6D to select the subject to be focused. 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 showing an example of the display screen 203 when the subject 501 is selected as the 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 superimposing a predetermined color or the like on the subject 501 (changing the color of the subject 501). This allows the user to easily recognize the subject that is the focus target. It should be noted that the highlighting of the subject to be focused is not limited to changing the color, and may be, for example, edge highlighting. Further, here, when the touch pressure is small, a subject close to the digital camera 100 is selected as a focus target. However, conversely, when the touch pressure is large, a subject close to the digital camera 100 may be selected as the focus target.

  In step S306, the CPU 113 determines whether the number of subjects detected in step S304 is greater than one. When the number of subjects is 1 or less (NO in S306), CPU 113 advances the process to step S308, and when the number of subjects is more than 1 (YES in S306), advances the process 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 suffices to determine whether or not the touch position has changed, and thus the process proceeds to step S308.

  In step S307, the CPU 113 determines whether 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 at every predetermined time when the touch is on, and notifies the CPU 113 of the detection result. Then, 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, the change in the touch pressure is detected by the change in the touch area. Therefore, for example, when the finger is strongly pressed against the display screen 203, the touch area is increased, and thus it is determined that the touch pressure is increased. 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 returned from step S307. In this case, the target of the highlighted display described with reference to FIG. 7 is also changed from the subject 501 to the subject 502. On the other hand, when the touch pressure does not change (NO in S307), CPU 113 advances the process to step S308.

  In step S308, 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. The touch panel control unit 114 detects the touch position at 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 (NO at S308), advances a process to step S309.

  In step S309, the CPU 113 determines whether touch-up is detected based on the coordinate information of the touch position from the touch panel control unit 114. CPU113 returns a process to step S306, when a touch up is not detected (NO in S309), and when a touch up is detected (YES in S309), advances a process to step S310. In step S310, the CPU 113 determines the subject selected in the latest step S306 as the subject to be focused. Then, in step S311, the lens control unit 104 drives the lens unit 103 under the control of the CPU 113 to focus on the subject determined as the focus target in step S310, and this processing ends.

  In the digital camera 100, the shooting operation is performed after step S311. After the lens unit 103 is controlled, imaging is performed by the image sensor 105, and the generated image data is written in 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, since the digital camera 100 selects the subject to be focused according to the touch pressure, 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 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 of determining a subject to be focused during the shooting operation of the digital camera 100. The processing of steps S801 to S804 shown in the flowchart of FIG. 8 is the same as the processing of steps S301 to S304 shown in the flowchart of FIG. 3, so description thereof will be omitted here. In step S805, the CPU 113 determines whether the touch pressure F1 detected in step S802 and stored in the RAM 118 is greater than or equal to a predetermined value. The threshold value F0 as a predetermined value is set in the range of 0 or more and Fmax or less.

  When 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 when 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 are described with reference to FIG. 6C. 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 are described with reference to FIG. 6C. Therefore, when the user wants to focus on a distant subject, he or she may touch the display screen 203 over a wide area, and when he wants to focus on a near subject, touch the display screen 203 over a narrow area. Good. In this way, the subject to be focused can be selected based on the magnitude of the touch pressure F1 that is initially detected when a touchdown occurs, so that the subject to be focused can be efficiently selected. And it can be performed easily. The processing of steps S808 to S813 is the same as the processing of steps S306 to S311 of the flowchart of FIG. 3, and therefore description thereof will be omitted here. By performing the processing of steps S808 to 813, for example, even when there are three or more subjects within the distance range P from the touch position, a subject between the closest subject and the farthest subject is focused. Can be easily selected as a subject to which is matched.

  Although the present invention has been described above in detail based on its preferred embodiments, the present invention is not limited to these specific embodiments, and various embodiments within the scope not departing from the gist 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, instead of the CPU 113, may be configured to determine whether the touch pressure at the touch position has changed. In this case, the CPU 113 may be configured to proceed with the process upon receiving the notification of the determination result from the touch panel control unit 114. Similarly, the processes of steps S308 and S309 may be configured such that the touch panel control unit 114 makes a determination. The above-described method of determining the subject to be the focus target can also be applied to a scene in which the focus target is determined when shooting a moving image.

  Further, the digital camera 100 described in the above embodiment has a structure in which an image pickup unit that picks up an image of a subject and a main body unit that performs various processes based on information obtained by the image pickup unit are integrated. The part and the body part may be separate bodies. A surveillance camera or the like can be given as an example of the image pickup apparatus in which the image pickup section and the main body section are separate bodies. In this case, the imaging unit and the main body unit are communicably connected by wired communication or wired communication. Then, among the constituent elements of the digital camera 100, the image pickup section may include at least the lens unit 103, the lens control section 104, and the image pickup element 105, and the main body section may include the other constituent elements. The present invention supplies a program that implements 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. It can also be realized by the processing. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

100 Digital Camera 104 Lens Control Unit 105 Image Sensor 106 Camera Signal Processing Unit 107 Subject Detection Unit 108 Distance Information Generation Unit 109 Display Control Unit 110 Display Device 111 Display Unit 112 Touch Panel 113 CPU
114 Touch panel control unit

Claims (10)

Acquisition means for acquiring a subject image,
A display unit that includes a touch panel and displays the subject image acquired by the acquisition unit;
Touch detection means for detecting a touch operation on the display means,
Pressure detection means for detecting the touch pressure on the display means,
Subject detection means for detecting a subject within a predetermined distance range centered on the touch position on the display means,
Distance measuring means for measuring the distance to the subject detected by the subject detecting means,
Selecting means for selecting a subject to be focused from among the subjects detected by the subject detecting means according to the magnitude of the touch pressure detected by the pressure detecting means;
An image pickup apparatus comprising: a focusing unit that focuses on a subject selected by the selecting unit based on the distance information acquired by the distance measuring unit. When a plurality of subjects are detected by the subject detection unit within the distance range, a pressure range obtained by equally dividing the maximum value of the touch pressure detectable by the pressure detection unit by the number of the plurality of subjects is calculated. An associating unit for associating the equally divided pressure range with the plurality of subjects,
The selection unit selects a subject associated with a pressure range including the touch pressure detected by the pressure detection unit from the equally divided pressure range as a subject to be focused. The imaging device described.   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, the selection unit selects one of the subjects within the distance range. 2. The imaging according to claim 1, wherein the farthest subject is selected as a subject to be focused, among the subjects within the distance range, if the subject is not more than the predetermined value. apparatus.   4. The image pickup apparatus according to claim 1, further comprising highlighting means for highlighting and displaying on the display means a subject selected as a subject to be focused by the selecting means.   The image pickup apparatus according to claim 1, wherein the pressure detection unit detects a touch pressure based on a touch area of a touch operation performed on the display unit.   The focusing means focuses an object selected as an object to be focused by the selecting 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 of controlling an imaging device, comprising:
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 the 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,
A focusing step of focusing on the subject selected in the selecting step based on the distance information acquired in the distance measuring step.   In the selecting step, if the touch pressure detected in the pressure detecting step when a touch operation on the display device is detected is equal to or more than a predetermined value, the farthest object among the objects within the distance range. The method of controlling the image pickup apparatus according to claim 7, wherein, when the value is not equal to or more than the predetermined value, the most recent subject among the subjects within the distance range is selected as a subject to be focused.   A program for causing a computer to execute each step of the control method according to claim 7. An image pickup apparatus comprising: an image pickup section for picking up an image of a subject;
The main body is
A display unit that includes a touch panel and displays the subject image acquired by the imaging unit;
Touch detection means for detecting a touch operation on the display means,
Pressure detection means for detecting the touch pressure on the display means,
Subject detection means for detecting a subject within a predetermined distance range centered on the touch position on 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,
The imaging unit is
An image pickup apparatus comprising: a focusing unit that focuses on a subject selected by the selecting unit based on the distance information acquired by the distance measuring unit.