JP2009290318A - Image capturing apparatus and zooming adjustment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image capturing apparatus can perform zooming adjustment suitable for user's taste, even when a plurality of subject images are contained in an image. <P>SOLUTION: The image capturing apparatus includes a zooming means, an subject detecting means, an subject selecting means, and a zooming adjusting means. The zooming means expands or reduces a captured image. The subject detection means detects a subject image indicative of a specific subject of interest included at the captured image. The subject selecting means selects any one of the subject images when there are a plurality of subject images detected by the subject detection means. The zooming adjusting means adjusts expansion or reduction of the captured image performed by the zooming means so that a size of a selected subject image chosen by the subject selecting means becomes a predetermined size. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an imaging apparatus such as a digital camera and a video camera, and a zoom adjustment method.

  2. Description of the Related Art Conventionally, an imaging apparatus that captures an optical image of a subject as a still image (still image) or a moving image (moving image), converts the captured image into image data, and stores the image electronically is known. Conventional imaging apparatuses include a digital camera mainly for taking still pictures and a video camera mainly for taking moving pictures.

Various digital cameras and video cameras have been widely used. For example, Patent Document 1 discloses a digital camera that includes a zoom unit and performs zoom adjustment by the zoom unit in accordance with a change in the size of a target image indicating a target object.
JP 2007-251429 A

  In a conventional imaging apparatus, zoom adjustment can be performed in accordance with the size change of the target image.

  However, when an image is captured using an imaging device, there may be a case where a plurality of target images of an object (for example, a person) are included in the image. In such a case, in the conventional imaging apparatus, one of them cannot be selected by the user. For this reason, an erroneous zoom adjustment such as enlargement of a target image that the user does not want may be performed, and the zoom adjustment may not be suitable for the user's preference.

  Accordingly, the present invention has been made to solve the above problems, and an imaging apparatus and a zoom adjustment method capable of performing zoom adjustment suitable for the user's preference even when a plurality of target images are included in the image. The purpose is to provide.

  In order to solve the above problems, the present invention provides zoom means for enlarging or reducing a captured image corresponding to an imaging signal output from an image sensor, and target detection for detecting a target image indicating a specific target object included in the captured image. And a target selection means for selecting one of the target images when there are a plurality of target images detected by the target detection means, and a size of the selection target image selected by the target selection means is determined. The image pickup apparatus includes a zoom adjustment unit that adjusts enlargement or reduction of a captured image performed by the zoom unit so as to have a size.

  In addition, the present invention is a zoom adjustment method in an imaging apparatus including a zoom unit that enlarges or reduces a captured image according to an imaging signal output from an imaging element, and indicates an object indicating a specific object included in the captured image When target detection is performed to detect an image, and there are a plurality of target images detected by target detection, target selection for selecting any one of the target images is performed, and the size of the selection target image selected by target selection is Provided is a zoom adjustment method for adjusting enlargement or reduction of a photographed image performed by a zoom unit so as to have a predetermined size.

  As described above in detail, according to the present invention, it is possible to obtain an imaging apparatus and a zoom adjustment method capable of performing zoom adjustment suitable for a user's preference even when an image includes a plurality of target images.

  Embodiments of the present invention will be described below. In addition, the same code | symbol is used for the same element and the overlapping description is abbreviate | omitted.

(Configuration of imaging device)
FIG. 1 is a rear view showing an external appearance of an imaging apparatus 100 according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the main configuration of the imaging apparatus 100. An imaging apparatus 100 shown in FIGS. 1 and 2 is a digital video camera that mainly captures moving images and can also capture still images.

  The imaging apparatus 100 includes various electronic components such as a CCD (Charge Coupled Devices) 121, and has a main body 140 provided with various operation keys 118 described later, and an LCD display 109. The LCD display unit 109 is movably attached to the side surface portion of the main body unit 140. The LCD display unit 109 is a display unit that displays a captured video.

  The imaging apparatus 100 handles data compressed in accordance with MPEG-2 when shooting or reproducing a moving image. When the moving image is reproduced, the imaging apparatus 100 can easily realize trick reproduction such as reverse reproduction, high-speed reproduction, high-speed reverse reproduction, frame advance, and frame return in addition to normal reproduction. Further, unlike the case where the image data recording medium is a magnetic tape, the imaging apparatus 100 uses a randomly accessible recording medium such as an HDD 105 or a memory card 106a described later. Therefore, it is possible to easily search for a video that the user wants to see.

  2, the imaging apparatus 100 includes a digital signal output unit 101, a signal processing unit 102, a compression / decompression processing unit 103, a memory 104, and an HDD (Hard Disk Drive) 105.

  Further, the imaging apparatus 100 includes a memory card slot 106, a video decoder 107, an LCD (Liquid Crystal Display) driver 108, an LCD 109, a LAN controller 110, and a USB controller 111. Furthermore, the imaging apparatus 100 includes a LAN terminal 112, a USB terminal 113, a CPU 114, a lens unit 115, a zoom driver 116, a focus driver 117, various operation keys 118, a face detection / identification unit 119, and an OSD. It has a generator 120 and a CCD 121.

  The digital signal output unit 101 converts an analog electrical signal generated by a CCD (Charge Coupled Device) 121 using an optical image of a subject obtained through the lens unit 115 into a digital signal and outputs the digital signal to the signal processing unit 102.

  The signal processing unit 102 has a function as a moving image data generation unit that performs image processing on an input digital signal and generates moving image data indicating a captured image that is actually captured. Note that the generated moving image data is temporarily stored in the memory 104.

  The compression / decompression processing unit 103 compresses the moving image data extracted from the memory 104 according to MPEG-2 to be compressed moving image data, and compresses still image data according to JPEG into compressed still image data. Further, the compression / decompression processing unit 103 decompresses the compressed moving image data and the compressed still image data in accordance with an instruction from the CPU 114.

  The memory 104 temporarily stores data to be processed by the signal processing unit 102 and data to be processed by the compression / decompression processing unit 103.

  The HDD 105 is an external storage device, and records moving image data (compressed moving image data), audio data, and compressed still image data compressed in a built-in HD (Hard Disc). The HDD 105 reads and writes data with respect to an HD (Hard Disc) by random access.

  The memory card slot 106 is inserted with a memory card 106a such as an SD memory card (Secure Digital memory card), and reads / writes data from / to the inserted memory card 106a. Compressed moving image data and the like are recorded on the memory card 106a.

  The video decoder 107 performs a decoding process on the moving image data and outputs the decoded image to the LCD driver 108 in order to display the captured image using the compressed moving image data. The video decoder 107 is a software decoder realized by a decoding program.

  The LCD driver 108 converts the decoded moving image data received from the video decoder 107 into a display signal suitable for the interface of the LCD 109. The LCD 109 displays a captured image using the display signal output from the LCD driver 108. Further, the LCD 109 displays a predetermined GUI (Graphical User Interface) in accordance with a user operation.

  The LAN controller 110 transfers the moving image data extracted from the memory 104 to an external device (not shown) (for example, a DVD recorder or an HDD recorder) connected via the LAN terminal 112 in accordance with an instruction from the CPU 114. Further, the LAN controller 110 outputs moving image data captured from an external device to the memory 104 via the LAN terminal 112.

  The USB controller 111 transfers the moving image data extracted from the memory 104 to an external device (not shown) (for example, a personal computer) connected via the USB terminal 113 in accordance with an instruction from the CPU 114. Further, the USB controller 111 outputs moving image data captured from an external device to the memory 104 via the USB terminal 113.

  The CPU 114 operates as various means (storage control means, zoom adjustment means, acquisition means, direction display control means) according to a program stored in a ROM (not shown). In addition, the CPU 114 inputs and outputs signals with other components, and performs operation control of the entire imaging apparatus 100 and control of each sequence.

  The lens unit 115 has a plurality of lenses, and uses these lenses to form an optical image of the subject on the CCD 121. The zoom driver 116 is zoom means for enlarging or reducing the captured image by changing the imaging magnification (view angle) by changing the interval between the lenses constituting the lens unit 115 under the control of the CPU 114. The focus driver 117 operates the focus motor under the control of the CPU 114 to focus the optical image formed by the lens unit 115.

  The various operation keys 118 include the jog dial 118a, menu button 118b, enter button 118c, and REC button 118d shown in FIG. The jog dial 118a performs an operation for selecting various operation items in the imaging apparatus 100 and an operation for adjusting the brightness of the LCD 109. The menu button 118b is a button for displaying various operation menus on the LCD 109, the decision button 118c is a button for performing an operation for confirming the selection content or the operation content, and the REC button 118d is an operation for instructing start of photographing (recording start). It is a button to do.

  The face detection / identification unit 119 is referred to as an image (hereinafter referred to as “target image”) indicating a specific target whose size to be displayed is fixed in a target fixing mode, which will be described later. It has a function as object detection means for detecting a human face image. In addition, the face detection / identification unit 119 stores the position and pixel size of the detected target image in the entire image in the HDD 105, and acquires a plurality of target images and acquires target identification information described later. The target image (selection target image) selected by the user is identified from the others.

  Further, the OSD generator 120 generates data necessary for OSD display, and the CCD 121 generates an imaging signal corresponding to the optical image of the subject imaged by the lens unit 115 and sends the imaging signal to the digital signal output unit 101. Output.

(Operation contents of the imaging device)
Next, the operation content of the imaging apparatus 100 will be described. When the user operates the menu button 118b, a menu screen is displayed. The user operates the jog dial 118a to select a desired menu item, and operates the enter button 118c to confirm the operation content to be executed.

  When the user operates the REC button 118d, moving image data indicating a captured image is recorded on the HDD 105 (or the memory card 106a), and the captured image is displayed on the LCD 109.

  When the user selects playback of the recorded image, the image is displayed on the LCD 109 using the moving image data read from the HDD 105 (or the memory card 106a).

  Furthermore, when a still image or a moving image recorded on the HDD 105 or the memory card 106 a is transferred to an external device or received from an external device, it is transmitted and received from the USB port 113 via the USB controller 111. This assumes that the external device is a personal computer. Also, moving picture data compressed in MPEG can be directly transmitted to and received from a video recording / reproducing apparatus such as a DVD recorder.

  In general, when transferring these moving image data to a DVD recorder, the moving image data compressed in MPEG is decoded on the imaging device 100 side, output in analog form from the video terminal or S terminal, and analog on the video recording / reproducing device side. Recompress and save the signal. In this method, for example, it takes one hour to record moving image data recorded for one hour on a DVD. However, in the present embodiment, moving picture data compressed by MPEG can be transferred as it is to a DVD as a streaming as it is, and the transfer time depends on the compression rate, but it is several tens of times the real time. And the image quality remains high because it is not re-encoded. For example, it takes 6 minutes for 1/10 to record moving image data recorded for one hour on a DVD recorder. When a LAN is considered as a network, transmission / reception is performed from the LAN terminal 112 via the LAN controller 110. The transfer to the DVD recorder is not limited to moving images, and may be still images or audio.

  As described above, when the recording medium is the HDD 105, the volume of the moving image data to be recorded increases, so that high speed is required for moving and returning the moving image. Therefore, the jog dial 118a is used to operate them without stress. The jog dial 118a gives information on the rotation angle and rotation speed to the CPU 114 that controls the entire system. The CPU 114 controls the image display speed and the like based on the information.

(Operation in target fixed mode)
Next, it is assumed that the user operates the jog dial 118a and selects the target fixing mode from the menu screen. In this case, a menu screen for determining the operation content of the target fixing mode as shown in FIG. As shown in FIG. 4, the target fixing mode is a mode for enlarging or reducing the captured image so that the target image is displayed on the LCD 109 at a certain size when the captured image is present. . At this time, in the imaging apparatus 100, the CPU 114 responds to a change in distance from the imaging apparatus 100 to a subject (referred to as a specific target object, which is assumed to be a person in the present embodiment) that is the source of the target image. The zoom driver 116 is operated to adjust the enlargement or reduction of the captured image performed by the zoom driver 116 (this adjustment is also referred to as zoom adjustment). At this time, the CPU 114 performs an operation as a zoom adjustment unit.

  For example, as shown in FIG. 4, when a reference size 200, which will be described later, is set, a person who becomes a specific object moves away from the imaging apparatus 100, and a target image 150 indicating the person becomes small as shown in FIG. Suppose that The face detection / identification unit 119 detects the target image 150 from the part moved to the arrows f1, f2, and f3 in the captured image. At the same time, the CPU 114 performs an operation as a zoom adjustment unit and operates the zoom driver 116 in accordance with the reduction ratio of the target image 150, whereby the captured image is set so that the face portion of the target image 150 becomes the reference size 200. Is enlarged and displayed on the LCD 109 as shown in FIG. In this way, the CPU 114 adjusting the enlargement or reduction of the target image 150 performed by the zoom driver 116 is also referred to as automatic zoom adjustment, and is also referred to as tracking processing of the target image because it is displayed while tracking the target image (FIG. 12). S105).

  The menu screen displayed in the target fixing mode includes a reference size setting unit 171 and a target determining unit 172. The user operates the jog dial 118a to move the cursor to the reference size setting unit 171 and operates the enter button 118c. Then, as shown in FIG. 4, a square GUI for setting the reference size 200 is displayed. When the user operates the jog dial 118a, the square GUI is enlarged or reduced. Therefore, when the user operates the determination button 118c when the square GUI reaches a desired size, the CPU 114 causes the reference size determining means to operate. The reference size 200 is determined according to the GUI at that time (S103 in FIG. 12). FIG. 4 shows a state where the reference size 200 is determined. When the reference size is determined, the CPU 114 performs zoom adjustment so that the size of the target image becomes the reference size 200. Further, the reference size 200 can be changed by performing the same operation again after the reference size 200 is determined.

  In addition, a plurality of person images may be included in the captured image, and a plurality of target images 151 to 156 may be included in addition to the target image 150 (see, for example, FIG. 7). Then, when the face detection / identification unit 119 performs an operation as the target detection unit and detects a plurality of target images including the target image 150 from the photographed image (S101 in FIG. 12), the CPU 114 operates as the target selection unit. 7, GUIs 150a and 151a to 156a for selecting any one of the detected target images 150 and 151 to 156 are displayed on the face portion (S102 in FIG. 12).

  In this case, when the user selects the target determination unit 172 from the menu screen, the user can select one of a plurality of target images by operating the jog dial 118a. That is, when the user operates the jog dial 118a, the cursor sequentially moves the GUIs 150a and 151a to 156a in accordance with the operation, so that the user operates the decision button 118c when the cursor is over the desired GUI. Then, the target image is selected by the GUI on which the cursor is displayed at that time. The selected target image is also referred to as a selection target image. The target image can be changed by performing the same operation again after selecting the target image, or the target image can be changed during the automatic zoom adjustment by performing the same operation during the automatic zoom adjustment. .

  Further, the CPU 114 performs an operation as an acquisition unit, and target identification information (hereinafter “selection identification information”) for identifying a face portion in a selection target image (the target image 150 is assumed in the following description). Is acquired from the face detection / identification unit 119, and the acquired target identification information is stored and saved in the HDD 105 as identification information storage means (S104). The CPU 114 can determine which target image is to be tracked by using the selection identification information. When a series of operation procedures of the imaging apparatus 100 in the target fixing mode as described above is displayed as a flowchart, it is as shown in FIG. The target identification information refers to information necessary for identifying a target object such as the shape of a person's face, skin color, facial organs (eyes, nose, mouth, ears, etc.) and contour. I mean.

  Although not shown, when the user manually operates a zoom button (not shown) while the CPU 114 is performing automatic zoom adjustment, the CPU 114 gives priority to the operation of the zoom button. That is, the CPU 114 operates the zoom driver 116 according to the operation of the zoom button, and enlarges or reduces the captured image. Thereby, priority can be given to zoom adjustment by a user's manual operation rather than automatic zoom adjustment.

  Next, when a plurality of target images are detected in the target fixing mode, the CPU 114 can also operate according to the flowchart shown in FIG. FIG. 13 is a flowchart showing an operation procedure when a plurality of target images are detected.

  When the CPU 114 detects a plurality of target images (S201), the CPU 114 proceeds to S202 and determines whether or not the target image to be used as a reference is selected from the identification information DB (S202). When the reference target image is selected, the detected target image is matched with the selected target image (S203), and based on the result, the CPU 114 determines whether there is a target image in the detection. (S204). If there is no target image, a process of selecting a reference target image (for example, displaying and selecting a GUI as described above) from the detected one is performed (S205). If there is a target image, the process proceeds to S206. Change the display of the reference target image in (for example, display the frame line surrounding the target image in a different color from the other target images), move to the target image tracking process, and perform an operation to end the tracking process Continue processing until

  By the way, when the CPU 114 performs automatic zoom adjustment, the target image 150 may be displayed at a position close to the peripheral portion of the display area of the LCD 109 as the specific target object moves as shown in FIG. In this case, if the size of the target image 150 is enlarged as it is until the reference size 200 is reached, the target image 150 covers the peripheral portion of the display area of the LCD 109 before the reference size 200, as shown in FIG. If the image is further enlarged, the target image 150 may be out of the display area, and the display may be difficult to see. In order to avoid this, the imaging apparatus 100 operates the automatic zoom adjustment in S105 described above according to the flowchart shown in FIG.

  That is, the CPU 114 advances the operation to S301 and operates the zoom driver 116 according to a part (for example, 10%) of the size change amount until the current target image 150 is enlarged to the reference size 200. Enlarge the shot image. In subsequent S302, the CPU 114 determines whether or not the size of the target image 150 after the size change has reached the reference size 200. If yes, the operation is terminated, and if not, the operation proceeds to S303.

  Next, the CPU 114 determines whether or not the image enlargement limit by the zoom driver 116, that is, whether or not the enlargement rate of the image by the zoom driver 116 is the maximum enlargement rate, in which case the process proceeds to S305, otherwise The operation proceeds to S304. When the operation proceeds to S304, the CPU 114 determines whether or not the enlarged target image 150 has come into contact with the edge of the angle of view, that is, whether it has been applied to the peripheral portion of the display area of the LCD 109, in which case the operation proceeds to S305. Otherwise, return to S301 and repeat the above operation.

  In step S305, the CPU 114 stops the image enlargement by the zoom driver 116, displays a warning message (for example, the target image is in the corner of the screen) in the message display area 109a, and then ends the processing. To do. The CPU 114 may display an arrow 201 in the display area 109c as shown in FIG. 10 instead of or in addition to displaying the warning message in the message display area 109a. This arrow 201 indicates the direction in which the lens unit 115 (main body 140) should be moved when moving the target image 150 to the center of the screen. When the user moves the lens unit 115 (main body 140) in the direction of the arrow 201, the target image 150 moves toward the center of the screen, so that the target image 150 can be further enlarged.

  Furthermore, when the CPU 114 performs automatic zoom adjustment, the person who is the source of the target image 150 may move in the horizontal direction. Even in such a case, in order to continue the automatic zoom adjustment, it is necessary to display the target image 150 on the LCD 109, and the lens unit 115 (main body 140) must be moved.

  In addition, with the movement of the person who is the source of the target image 150, the target image 150 may disappear from the LCD 109 and then be displayed again on the LCD 109. If the target image must be determined again in such a case, the user's operation becomes troublesome. In the imaging apparatus 100, in order to eliminate these problems, the CPU 114 operates according to FIG.

  The CPU 114 determines whether or not the target image 150 has disappeared from the angle of view, in which case the operation proceeds to S402, and otherwise the operation ends. When the CPU 114 proceeds to S402, the CPU 114 searches for a target image from the captured image. When the CPU 114 detects the target image in the subsequent S403, the CPU 114 determines whether the detected target image is the selection target image using the selection identification information stored in the HDD 105 for specifying the selection target image (S404). . If the detected target image is not the selection target image, the process returns to S402, and the target image is searched again from the captured image. When the detected target image is a selection target image, automatic zoom adjustment is performed so as to track the target image, and this is continued until a tracking stop operation is performed.

  As described above, in the imaging apparatus 100, even when a plurality of target images are included in the captured image, the user selects one of them, and zoom adjustment is performed while tracking the selected target image. Therefore, zoom adjustment suitable for the user's preference can be performed, and an erroneous target image is not enlarged. Further, in the imaging apparatus 1, the size of the target image can be specified in the automatic zoom adjustment, and the automatic zoom adjustment is performed so that the target image is displayed at the specified size. It is possible to make it suitable for the taste. In addition, the reference size can be arbitrarily specified, which is also suitable for the user's preference.

  Furthermore, during automatic zoom adjustment, if the enlarged target image reaches the periphery of the display area of the LCD 109 or if the maximum enlargement ratio is reached before the reference size is reached, the enlargement is stopped and a warning message is displayed. Since it is displayed or the moving direction is displayed, the enlarged target image does not become difficult to see.

  The imaging apparatus 100 stores selection identification information for identifying a selection target image selected by the user, and determines whether the detected target image is a selection target image using the stored selection identification information. Therefore, even if there are a plurality of target images, it is not necessary for the user to repeatedly select, and the convenience for the user is improved accordingly.

  In the above description, a case where a moving image is recorded has been described as an example, but the imaging apparatus 100 is also applicable to a case where a still image is recorded.

  Note that the imaging apparatus 100 described above has the HDD 105 as an external storage device that can read and write data by random access, but in addition to the HDD 105, a DVD drive that records data on a DVD (Digital Versatile Disk). You may have. Then, the moving image data may be stored in a rewritable storage medium such as DVD-RW or DVD-RAM by a DVD drive.

  The above description is the description of the embodiment of the present invention, and does not limit the apparatus and method of the present invention, and various modifications can be easily implemented. In addition, an apparatus or method configured by appropriately combining components, functions, features, or method steps in each embodiment is also included in the present invention.

It is a rear view which shows the external appearance of the imaging device which concerns on embodiment of this invention. Similarly, it is a block diagram which shows main structures. It is a figure which shows an example of the menu screen of object fixation mode. It is a figure which shows an example of a target image and a reference | standard size. It is a figure which shows an example when a target image is displayed small. It is a figure which shows an example at the time of enlarging a picked-up image and enlarging the size of a target image. It is a figure which shows an example at the time of displaying GUI which selects either among several target images. It is a figure which shows an example of the picked-up image at the time of performing automatic zoom adjustment about the selection target image among several target images. It is a figure which shows an example when a target image is displayed near the edge part of a view angle. Similarly, it is a figure which shows an example at the time of enlarging a picked-up image and enlarging the size of a target image. It is a figure which shows an example of the picked-up image when a target image moves. It is a flowchart which shows the operation | movement procedure in the case of performing automatic zoom adjustment. It is a flowchart which shows the operation | movement procedure in the case of performing automatic zoom adjustment when two or more target images are detected. It is a flowchart which shows the operation | movement procedure in the case of performing an automatic zoom adjustment when a target image is displayed near the edge part of a view angle. It is a flowchart which shows the operation | movement procedure in the case of performing automatic zoom adjustment when a target image lose | disappears from an angle of view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Imaging device, 102 ... Signal processing part, 105 ... HDD, 109 ... LCD, 114 ... CPU, 115 ... Lens unit, 116 ... Zoom driver, 119 ... Face detection / identification part, 150, 151, 152, 153, 154 , 155, 156... Target image, 200.

Claims (9)

Zoom means for enlarging or reducing a captured image according to an imaging signal output from the imaging element;
Object detection means for detecting a target image indicating a specific object included in the captured image;
Target selection means for selecting any one of the target images when there are a plurality of the target images detected by the target detection means;
Zoom adjustment means for adjusting enlargement or reduction of the captured image performed by the zoom means so that the size of the selection target image selected by the target selection means becomes a predetermined size. apparatus. The zoom means further includes a reference size determining means for determining a reference size as a reference when enlarging or reducing the selection target image;
The imaging apparatus according to claim 1, wherein the zoom adjustment unit adjusts enlargement or reduction of the captured image performed by the zoom unit so that a size of the selection target image becomes the reference size. Image display means for displaying the captured image;
The zoom adjustment means stops the enlargement of the photographed image performed by the zoom means when the selection target image enlarged by the zoom means reaches the periphery of the display area of the image display means. The imaging apparatus according to claim 2. Obtaining means for obtaining identification information for identifying the target image;
Identification information storage means for storing the identification information acquired by the acquisition means;
The imaging apparatus according to claim 3, further comprising a storage control unit that causes the identification information storage unit to store selection identification information corresponding to the selection target image among the identification information acquired by the acquisition unit.   The zoom adjustment means, when the selection identification information is stored in the identification information storage means, the photographing by the zoom means so that the selection target image specified by the selection identification information becomes the reference size. The image pickup apparatus according to claim 3, wherein enlargement or reduction of an image is adjusted.   The zoom adjusting means enlarges the captured image performed by the zoom means when the enlargement ratio of the zoom means reaches the maximum enlargement ratio before the selection target image enlarged by the zoom means reaches the reference size. The imaging apparatus according to claim 3, wherein the imaging apparatus is stopped.   The imaging apparatus according to claim 3, further comprising: a direction display control unit that causes the image display unit to display a direction display image indicating a moving direction of the target image in the captured image. A zoom adjustment method in an imaging apparatus comprising a zoom means for enlarging or reducing a captured image according to an imaging signal output from an imaging element,
Performing target detection to detect a target image indicating a specific target object included in the captured image;
When there are a plurality of target images detected by the target detection, a target selection for selecting any one of the target images is performed.
A zoom adjustment method comprising adjusting the enlargement or reduction of the captured image performed by the zoom means so that the size of the selection target image selected by the target selection becomes a predetermined size.   When the selection target image magnified by the zoom unit is located on a peripheral edge of a display area of the image display unit that displays the captured image, the zoom unit stops the expansion of the captured image. The zoom adjustment method according to claim 8.

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