JP6104022B2 - Imaging apparatus, control method thereof, and program - Google Patents

Description

  The present invention relates to an imaging apparatus having an auxiliary display function for displaying a waveform image based on an edge component of a captured video, a control method thereof, and a program.

  With the advancement of automatic focus detection (Auto Focus: hereinafter referred to as AF) technology, AF is mainly used for focus detection in an imaging apparatus such as a still camera or a video camera.

  On the other hand, manual focus adjustment is necessary when it is necessary to focus precisely as in macro shooting, when shooting intentionally blurred images, or when AF is difficult to focus on. (Manual Focus: hereinafter referred to as MF) is often taken. In particular, when performing the MF operation, the operability and the focusing accuracy greatly depend on the resolution of the optical viewfinder and the display device (electronic viewfinder (EVF)). However, increasing the size and resolution of the optical viewfinder and display device leads to an increase in size and cost of the imaging device. Therefore, it cannot be said that all of the imaging devices are equipped with sufficient optical viewfinder and display device to realize easy and highly accurate MF operation.

Therefore, various auxiliary display functions are realized so that the photographer can easily understand the degree of focus (in-focus state). For example, there are highlighting (peaking) of an in-focus edge portion in the captured image, partial enlargement display for confirming the in-focus state, and the like.
Further, Patent Document 1 discloses an imaging apparatus that includes a viewfinder that can display graphics, and that displays a high-frequency component histogram extracted from an imaging signal in a two-dimensional graph on the viewfinder. .
In Patent Document 2, an edge component in a predetermined direction of a captured image is extracted, a waveform display image representing the level of the extracted edge component and the extracted position is generated, and the waveform display image is displayed together with the captured image. An imaging device for display is disclosed.

Japanese Patent No. 4089675 JP 2010-243923 A

  However, when the histogram and the waveform display image are always displayed, a part of the important image being captured is covered, and there is a problem in that it is difficult to check the angle of view. Therefore, during normal shooting, the display of the histogram and the waveform display image is turned off, and it is necessary to turn it on when the focus is confirmed. This operation is complicated.

  The present invention has been made in view of the above points, and an object of the present invention is to display a waveform image based on an edge component at the timing of focusing without interfering with an image being shot. To do.

An imaging apparatus according to the present invention includes a display control unit that displays a captured image on a display unit, an enlarged display unit that displays an enlarged portion of the captured image on the display unit, and a waveform image based on an edge component of the captured image. Waveform image generation and display means for generating and displaying on the display unit, the waveform image generation and display means having a mode for generating and displaying the waveform image in conjunction with the enlarged display of the captured image by the enlarged display means. Then, after the enlarged display of the captured image by the enlarged display means is canceled and the display returns to the normal captured image display, the display control means clearly indicates the area that has been enlarged and displayed so far for a predetermined time. At the same time, the waveform image generation and display means generates a waveform image based on the edge component of the region that has been enlarged and displayed so that a waveform image based on the edge component outside the region can be visually discriminated. , And displaying.

  According to the present invention, since the waveform image based on the edge component is generated and displayed in conjunction with the enlarged display of the captured image, in this mode, the focus can be adjusted without disturbing the image being captured. A waveform image based on the edge component is displayed at the timing of matching.

It is a block diagram which shows the structure of the high-vision digital video camera which concerns on 1st Embodiment. It is a figure which shows the structure which concerns on edge component extraction from the picked-up image in a video control part, the production | generation and display control of the waveform image, and the production | generation and display control of the image for an enlarged display. It is a figure which shows the example of a display when it is set to normal edge monitor display setting. It is a figure which shows the example of a display when it is set to the edge monitor display setting linked with an enlarged display. It is a flowchart which shows a process when performing enlarged display in 1st Embodiment. It is a block diagram which shows the structural example of the video control part of the high-vision digital video camera which concerns on 2nd Embodiment. It is a flowchart which shows a process when canceling | expanding a display and performing a normal screen display in 2nd Embodiment.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
<First Embodiment>
As an example of the imaging apparatus according to the first embodiment, a high-definition digital video camera (hereinafter referred to as a video camera) having a manual focus function will be described.
FIG. 1 is a block diagram showing the configuration of the video camera according to the first embodiment.
The lens unit 101 constitutes an optical system that forms a subject image on the imaging surface of the image sensor 102, and includes a zoom function, a focus adjustment function, and an aperture adjustment function.
The image sensor 102 has a configuration in which a large number of photoelectric conversion elements are two-dimensionally arranged, and converts the subject optical image formed by the lens unit 101 into a video signal in units of pixels. The image sensor 102 may be, for example, a CMOS (Complementary Metal Oxide Semiconductor) image sensor or a CCD (Charged Coupled Device) image sensor. The image sensor 102 has an electronic shutter function by adjusting the charge accumulation time by the photoelectric conversion element.
The image sensor driving unit 103 drives and controls the image sensor 102 according to the timing controlled by the camera signal processing unit 106.

The CDS / AGC unit 104 performs correlated double sampling (CDS) on the analog video signal from the image sensor 102 to reduce noise, and performs signal level gain control (AGC) according to the control of the system control unit 111.
An A / D (Analog to Digital) conversion unit 105 converts an analog video signal from the CDS / AGC unit 104 into a digital video signal and supplies the digital video signal to the camera signal processing unit 106.

The camera signal processing unit 106 performs signal processing on the digital video signal from the A / D (Analog to Digital) conversion unit 105.
The first storage unit 107 is a storage unit for camera signal processing, and is used by the camera signal processing unit 106 as a frame memory or the like for signal processing of captured images.

  The lens driving unit 108 drives the motor and actuator of the lens unit 101 according to the control of the system control unit 111, and performs zoom magnification, focus adjustment, and exposure adjustment. The lens driving unit 108 is controlled by the system control unit 111 based on the signal processing result in the camera signal processing unit 106. For example, at the time of AF control, the system control unit 111 controls the lens driving unit 108 based on the AF evaluation value obtained by the camera signal processing unit 106, and drives and controls the focus adjustment lens of the lens unit 101. To focus on the subject. When the manual focus mode for manually adjusting the focus of the lens unit 101 is set, the system control unit 111 detects the focus adjustment operation by the photographer. Specifically, the system control unit 111 detects an operation of a focus ring adjustment switch or lever included in the input operation unit 113 or a focus ring provided on the outer periphery of the lens barrel of the lens unit 101. Then, the system control unit 111 controls the lens driving unit 108 according to the moving direction and moving amount of the focal point corresponding to the detected operation, and changes the focal length of the lens unit 101. If the focal length of the lens unit 101 can be mechanically changed by a switch or lever operated by the photographer, the system control unit 111 and the lens driving unit 108 do not need to be interposed.

The system control unit 111 may be, for example, a CPU, and controls the overall operation of the video camera including an auxiliary display process during manual focus, which will be described later, by executing a program stored in the third storage unit 116, for example. .
The third storage unit 116 is a storage unit for system control, and includes, for example, a ROM and a RAM, and stores programs executed by the system control unit 111, various settings, initial values, and the like. The third storage unit 116 is also used as a work area for the system control unit 111.

The input operation unit 113 is a user interface for a photographer to give an instruction to the video camera, and includes input devices such as keys, buttons, and a touch panel. The input operation unit 113 includes selection buttons and decision buttons for various functions such as an enlarged display ON / OFF button, a zebra pattern and peaking display ON / OFF, and a manual focus / assist function display ON / OFF. The input operation unit 113 also includes a shutter button for still image shooting, an MF ring, a zoom switch, an aperture adjustment dial, and the like.
The time measuring unit 114 includes a real time clock (RTC) and a backup battery, and returns date information in response to a request from the system control unit 111.

The video control unit 115 performs display control including adjustment of hue, saturation, and brightness for the first display unit 122 and the second display unit 123, control of the recording / reproducing unit 120, and the like. The video control unit 115 performs resolution conversion of video signals for each video output system including the first display unit 122 and the second display unit 123, generation of zebra patterns and peaking signals, superimposed display control, and edge component extraction from the captured video. The waveform image is generated and superimposed display is controlled, and the enlarged display image is generated and displayed. The video control unit 115 also performs OSD (On Screen Display) display control such as shooting information and user setting menus.
The second storage unit 112 is a storage unit for video control, and is used as a frame memory, a work memory, or the like when the video control unit 115 performs signal processing related to the video baseband signal. Further, when an instruction to perform enlarged display is input to the system control unit 111 via the input operation unit 113, the system control unit 111 performs enlarged display.

A codec (CODEC) unit 117 performs an image codec that performs encoding / decoding processing of a moving image or the like. The encoding / decoding format may be the MPEG (Moving Picture Experts Group) -2 system, other formats, JPEG2000 for still images, PNG format, or the like. The codec unit 117 is connected to the video control unit 115, and executes encoding / decoding of a video signal in accordance with a command from the video control unit 115.
The fourth storage unit 119 is a codec storage unit, and is used when the codec unit 117 performs encoding / decoding of a video signal.

The recording / reproducing unit 120 records or reads recording data, which is encoded by the video control unit 115 and the codec unit 117 and processed as a recording format, to the recording medium 121.
The first display unit 122 and the second display unit 123 display information. In the present embodiment, the second display unit 123 is smaller than the first display unit 122 and is provided in the viewfinder. On the other hand, the first display unit 122 is a relatively large display device that can be opened and closed on the side surface of the housing, for example. The first display unit 122 and the second display unit 123 display an auxiliary display such as a focus frame display in addition to an input image and an enlarged image from the image sensor 102. By sequentially displaying the input video from the image sensor 102, the first display unit 122 and the second display unit 123 function as an electronic viewfinder (EVF). The auxiliary display includes a manual focus auxiliary display such as a zebra pattern display, a peaking display, and a waveform image display based on an edge component of a captured image.

  Here, for convenience, it is described that the first to fourth storage units 107, 112, 116, and 119 are individually provided for camera signal processing, system control, video control, and codec, Physically, it may be realized by the same storage medium. The first to fourth storage units 107, 112, 116, and 119 are typically configured by readable and writable semiconductor memories, but may be configured by other storage media.

Here, an outline of waveform image display based on the edge component of the captured image in the first embodiment will be described. The waveform image display based on the edge component of the captured image is also called an edge monitor function.
FIG. 3 shows a display example of the first display unit 122 when the normal edge monitor display setting is set.
As shown in FIG. 3, during normal shooting, the captured image is displayed on the full screen, and a waveform image 301 based on the edge component extracted from the captured image is superimposed and displayed at the bottom of the screen. The waveform image 301 extracts the edge component in the horizontal direction of the captured video, and represents the level of the extracted edge component and the extracted position. In order to make the waveform image 301 easy to see, a background color (semi-transparent black or the like) 302 may be displayed on the background of the waveform image 301. In that case, the visibility of the waveform image 301 can be improved by superimposing the background color 302 on the captured video and then superimposing the waveform image 301 on the background color 302.

4A and 4B show display examples of the first display unit 122 when the edge monitor display is linked to the enlarged display.
As shown in FIG. 4A, during normal shooting, the captured image is displayed in full screen and the edge monitor is turned off. As a result, it is possible to prevent the edge monitor from interfering with the decrease in the visibility of the image being shot, and the view angle confirmation and the like are not hindered.
In the state of FIG. 4A, when the user inputs focus adjustment or enlargement display input from the input operation unit 113, the center portion of the captured image is enlarged as shown in FIG. 4B. Is displayed. In conjunction with this enlarged display, a waveform image 401 based on the edge component extracted from the enlarged video is superimposed and displayed at the bottom of the screen. Thereby, focus adjustment becomes easier. The background color 402 is the same as the background color 302.
In the state of FIG. 4B, when there is no focus adjustment input for a certain time or an input for canceling the enlarged display is input from the input operation unit 113, the edge monitor is turned off on the screen of FIG. Or return to the screen of FIG.
As described above, it is possible to prevent the edge monitor from interfering with the decrease in the visibility of the image being shot, and the edge monitor can be viewed in conjunction with the enlarged display.
If it is desired to display the edge monitor even during normal shooting (see FIG. 3), it is possible to display the edge monitor according to menu settings or input from the input operation unit.

Hereinafter, a configuration related to edge component extraction from a captured image, generation and display control of a waveform image thereof, and generation and display control of an enlarged display image in the video control unit 115 will be described with reference to FIG. With the configuration shown in FIG. 2, the edge monitor display described in FIGS. 3 and 4 can be performed.
The enlarged display processing circuit 201 executes an enlarged process of the input captured video in response to a processing instruction signal from the system control unit 111.

The preprocessing unit 202 includes an edge extraction circuit 203, a memory controller A 204, and a waveform control unit 205.
The edge extraction circuit 203 extracts an edge signal from the captured video.
The memory controller A 204 performs bank switching control between the waveform storage memory Bank1 207 and the waveform storage memory Bank2 208 of the bank memory unit 206 for each field (or frame) of the video signal, and performs control for memory access. . The memory controller A 204 considers the current coordinate information of the video signal and the amplitude of the edge information extracted by the edge extraction circuit 203 as information in the orthogonal coordinate system, and generates an address for memory access.
For example, when a waveform image as shown in FIG. 4 is displayed in the horizontal direction, the memory address space is a two-dimensional space with the horizontal coordinate of the video signal as the horizontal axis and the amplitude (level) of the edge information as the vertical axis. Consider access control. Here, the access process is a process of first reading the data at the corresponding address and writing the data processed in the waveform control unit 205 described later back to the same address through the memory controller A 204 again.
The waveform control unit 205 adds the data read by the memory controller A 204 from the waveform storage memory Bank 1 207 to the edge information data extracted by the edge extraction circuit 203 and multiplied by an arbitrary gain, and again stores the data in the memory. Return to controller A 204. By controlling the gain by which the waveform control unit 205 multiplies the data of the edge information from the system control unit 111, it is possible to control the rate of increase of the data depending on the frequency and to control the visibility.

  Control is performed so that the display brightness is increased (brighter) when the data value of the frequently accessed address, that is, when the frequency of the same level is large, by these processes and the composition process in the image composition circuit 210 of the post-processing unit 209 described later. can do. Note that the initial value of each address is, for example, a value corresponding to the lowest luminance, and a predetermined value is written when accessed for the first time, and the above-described reading and writing back can be performed from the second access. As an effect of performing frequency control, it is possible to prevent a single noise component that is not an edge from being displayed and recognized as if it were an edge.

After processing in one field (or one frame) is completed, the data (and flag information) of each address is read by the memory controller B 211 of the post-processing unit 209, and a waveform image is generated based on the read address and data. Is done. In this embodiment, in the case of horizontal display as shown in FIG. 3, the memory address space is regarded as a two-dimensional space with the horizontal coordinate of the video signal as the horizontal axis and the amplitude (level) of the edge information as the vertical axis. Access control. Therefore, it is possible to visually grasp the edge component corresponding to the captured image, that is, the in-focus state.
In addition, by the above-described access control, large data is written to an address with a high access frequency. In other words, as the number of times edge components of the same level are extracted at the same coordinates (position) in the extraction direction, the luminance of the index representing the same level is displayed higher (brighter). Further, when edge components of different levels are extracted at different frequencies in the same coordinate in the edge component extraction direction (horizontal or vertical direction in the present embodiment), the brightness of the index corresponding to the position is not constant and is detected. It changes at the position corresponding to the level. Furthermore, since the edge component corresponding to the designated region is displayed differently from the edge component for other regions based on the flag information, it is possible to easily grasp which region corresponds to the edge component. .

The bank memory unit 206 includes a waveform storage memory Bank 1 207 and a waveform storage memory Bank 2 208.
The waveform storage memory Bank1 207 and the waveform storage memory Bank2 208 are equivalent, and are switched to be accessed from either the memory controller A 204 or the memory controller B 211 for each field (or frame) of the video signal. .
Here, it is assumed that when the waveform storage memory Bank1 207 is accessed from the memory controller A 204, the waveform storage memory Bank2 208 of another bank is controlled to be accessed from the memory controller B 211. In the next video field (or frame), the access relationship between the memory controller and the waveform storage memory is switched.

The post-processing unit 209 includes an image composition circuit 210 and a memory controller B 211.
The image synthesis circuit 210 synthesizes the video signal and the waveform image based on the edge information read from the bank memory unit 206 by the memory controller B 211 and displays the synthesized image on the first display unit 122. As described above, when the read edge information has flag information, the image composition circuit 210 displays the edge component so that it can be visually discriminated from the edge component having no flag information.
The memory controller B 211 reads the edge information written in the waveform storage memory Bank 1 207 or the waveform storage memory Bank 2 208 by the memory controller A 204 and supplies it to the image synthesis circuit 210.
As described above, the image composition circuit 210 generates a waveform image representing the level of the edge component and the extracted position from the edge information and the flag information, and aligns and synthesizes the captured image with the first display unit. 122.

  The system control unit 111 does not describe detailed connection wiring, but various controls in the video control unit 115, for example, the center frequency and gain control of the edge component extracted by the edge extraction circuit 203, and the gain in the waveform control unit 205 Take control. In addition, the system control unit 111 performs the presence / absence of the synthesis of the waveform display image based on the edge component in the image synthesis circuit 210, the synthesis position control for the video signal, the control of the waveform display method corresponding to the designated area and other areas, and the like. .

FIG. 5 is a flowchart showing screen display processing when an input for the user to perform focus adjustment or to perform enlarged display is input from the input operation unit 113 and enlarged display is performed.
A magnified display process of the captured image is executed (step S501), and it is determined whether or not the edge monitor display setting is linked to the enlarged display (step S502).
If the setting is ON in step S502, an edge monitor display process is executed (step S504).
If the setting is not ON in step S502, it is determined whether or not the normal edge monitor display setting was originally set (step S503).
If the normal edge monitor display setting is set in step S503, an edge monitor display process is executed (step S504). If the normal edge monitor display setting is not set in step S503, this processing is terminated without performing edge monitor display.
This enlargement display process is called at regular time intervals in accordance with an instruction to execute enlargement display from the user, and ensures that the captured image and the edge monitor are viewed in real time.

<Second Embodiment>
A high-definition digital video camera (hereinafter referred to as a video camera) having a manual focus function will be described as an example of an imaging apparatus according to the second embodiment. The configuration of the video camera is the same as the configuration of the video camera according to the first embodiment shown in FIG. 1, and the description thereof is omitted here.

Here, an outline of waveform image display based on the edge component of the captured image in the second embodiment will be described.
FIG. 3 shows a display example of the first display unit 122 when the normal edge monitor display setting is set. Since FIG. 3 has been described in the first embodiment, the description thereof is omitted here.

FIGS. 4A to 4C show display examples of the first display unit 122 when the edge monitor display setting linked to the enlarged display is set.
As shown in FIG. 4A, during normal shooting, the captured image is displayed in full screen and the edge monitor is turned off. As a result, it is possible to prevent the edge monitor from interfering with the decrease in the visibility of the image being shot, and the view angle confirmation and the like are not hindered.
In the state of FIG. 4A, when the user inputs focus adjustment or enlargement display input from the input operation unit 113, the center portion of the captured image is enlarged as shown in FIG. 4B. Is displayed. In conjunction with this enlarged display, a waveform image 401 based on the edge component extracted from the enlarged image is superimposed and displayed at the bottom of the screen. This makes it easier to adjust the focus.
In the state of FIG. 4B, when there is no focus adjustment input for a certain time or an input for canceling the enlarged display is input from the input operation unit 113, the screen transitions to the screen of FIG. In the screen of FIG. 4C, the captured image is displayed on the full screen, and the region 404 that has been enlarged and displayed last time is clearly shown. Then, a waveform image 403 based on the edge component extracted outside the area 404 is superimposed and displayed at the bottom of the screen. In addition, a waveform image 405 based on the edge component extracted in the region 404 is superimposed and displayed at the bottom of the screen. The waveform image 405 is displayed in a different color from the waveform image 403 so that it can be visually discriminated. The background color 406 is the same as the background colors 302 and 402. As a result, it is possible to easily recognize the result of the focus adjustment.
When a predetermined time elapses in the state of FIG. 4C, the screen returns to the screen of FIG. As a result, it is possible to prevent the edge monitor from interfering with the decrease in the visibility of the image being shot, and the view angle confirmation and the like are not hindered.

Hereinafter, a configuration related to edge component extraction from a captured image, generation and display control of a waveform image thereof, and generation and display control of an enlarged display image in the video control unit 115 will be described with reference to FIG. In the second embodiment, an area designation circuit 214 is added to the configuration of the video control unit 115 in the first embodiment shown in FIG. Below, it demonstrates centering around difference with 1st Embodiment, and abbreviate | omits description about a common point with 1st Embodiment.
The area designating circuit 214 notifies the memory controller A 204 of the information of the area designated through the system control unit 111 in the captured video by the area designating signal. There are no particular restrictions on the size, number, and position of the areas that can be specified from the system control unit 111 to the area specifying circuit 214.
Here, as shown in FIG. 4C, for example, after the enlarged display is performed (refer to FIG. 4B), when the display returns to the normal shooting display that is not enlarged, the previous enlarged display was performed. Assume that an area 404 is specified.

Further, the memory controller A 204 adds the flag information to the extracted edge component and writes it to the waveform storage memory for the area specified by the area specifying signal from the area specifying circuit 214. Then, the memory controller B 211 reads out the flag information including the flag information, and the image composition circuit 210 makes the edge information display method (for example, display color) for the designated area different from the edge information outside the designated area based on the flag information. Take control.
After the processing in one field (or one frame) is completed, the data (and flag information) of each address is read by the memory controller B 211, and a waveform image is generated based on the read address and data, and flag information. The In this embodiment, in the case of horizontal display as shown in FIG. 3, the memory address space is regarded as a two-dimensional space with the horizontal coordinate of the video signal as the horizontal axis and the amplitude (level) of the edge information as the vertical axis. Access control. Therefore, it is possible to visually grasp the edge component corresponding to the captured image, that is, the in-focus state.

  FIG. 4C schematically shows a state in which the waveform image 405 based on the edge component extracted in the designated area 404 is displayed in a color different from that of the waveform image 403 based on the edge component extracted outside the designated area 404. It expresses. The display color of the waveform image 405 in the designated area 404 may be designated from the system control unit 111. Further, the waveform images 403 and 405 extending over the designated area 404 and other areas are displayed at the same position in the horizontal direction. However, the parts having different levels are visible and the parts having the same level are visible. Can be combined and displayed by the image combining circuit 210 according to the priority order in accordance with the control from the system control unit 111.

  Also in the second embodiment, the screen display process when the user performs focus adjustment or input for executing enlarged display is input from the input operation unit 113 for enlarged display is the same as the flowchart of FIG. The difference from the first embodiment is that the setting is ON in step S502, and the process proceeds to step S504 to set the timer value T to the timer when executing the edge monitor display process.

FIG. 7 is a flowchart showing a screen display process when there is no focus adjustment input for a certain period of time, or when an input for canceling the enlarged display is input from the input operation unit 113 to cancel the enlarged display and to execute the normal screen display. is there.
The captured image is processed at the angle of view as it is (step S701), and it is determined whether or not the timer value T = 0 (step S702).
If the timer value T is not 0 in step S702, as shown in FIG. 4 (c), the captured image is displayed on the full screen, the region 404 previously enlarged is displayed, and the waveform based on the edge component is further displayed. The images 403 and 405 are superimposed and displayed (step S703). Thereafter, the timer value is subtracted (step S705), and this process ends.
If the timer value T = 0 in step S702, it is determined whether or not the normal edge monitor display setting is set (step S704).
If the normal edge monitor display setting is set in step S704, an edge monitor display process is executed (step S706). If the normal edge monitor display setting is not set in step S704, the present process is terminated without performing the edge monitor display.
This normal screen display process is called at regular intervals while a mode for displaying a normal captured image is held, and ensures real-time visual recognition of the captured image and the edge monitor.

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. A part of the above-described embodiments may be appropriately combined.
The present invention is applicable to any imaging device that displays an image captured by an imaging unit having a focus function for performing focus adjustment on a display unit. Such an image pickup apparatus includes, for example, a digital still camera, a camera-equipped portable information terminal, a camera-equipped mobile phone, and the like in addition to the video camera of the above-described embodiment.
(Other embodiments)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, etc.) of the system or apparatus reads the program. It is a process to be executed.

  101: Lens unit, 102: Image sensor, 103: Image sensor drive unit, 104: CDS / AGC unit, 105: A / D conversion unit, 106: Camera signal processing unit, 107: First storage unit, 108: Lens drive 111: System control unit 112: Second storage unit 113: Input operation unit 114: Timekeeping unit 115: Video control unit 116: Third storage unit 117: Codec unit 119: Fourth storage unit 120: Recording / playback unit 121: Recording medium 122: First display unit 123: Second display unit

Claims (4)

Display control means for displaying captured images on a display unit;
An enlarged display means for enlarging and displaying a part of the captured image on the display unit;
A waveform image generation and display means for generating a waveform image based on an edge component of the captured video and displaying the waveform image on the display unit;
In conjunction with the enlarged display of the captured image by the enlarged display means, generates a waveform image the waveform image generating display means, have a mode for displaying,
After the enlarged display of the captured image by the enlarged display means is canceled and the display returns to the display of the normal captured image, the display control means clearly shows the area that has been enlarged and displayed for a predetermined time, The waveform image generation and display means generates and displays a waveform image based on the edge component of the area that has been enlarged and displayed so that a waveform image based on the edge component outside the area can be visually discriminated. An imaging apparatus characterized by the above. The imaging apparatus according to claim 1, wherein the waveform image generation display unit stops displaying a waveform image based on an edge component when the predetermined time has elapsed. Display control means for displaying captured images on a display unit;
An enlarged display means for enlarging and displaying a part of the captured image on the display unit;
A method of controlling an imaging apparatus comprising waveform image generation and display means for generating a waveform image based on an edge component of the captured image and displaying the waveform image on the display unit,
The waveform image generation and display means generates and displays a waveform image in conjunction with the enlarged display of the captured image by the enlarged display means ;
After the enlarged display of the captured image by the enlarged display means is canceled and the display returns to the display of the normal captured image, the display control means clearly shows the area that has been enlarged and displayed for a predetermined time, The waveform image generation and display means generates and displays a waveform image based on the edge component of the region that has been enlarged and displayed so that a waveform image based on the edge component outside the region can be visually discriminated. And a control method for the imaging apparatus. Display control means for displaying captured images on a display unit;
An enlarged display means for enlarging and displaying a part of the captured image on the display unit;
Generate a waveform image based on an edge component of the captured video, and cause a computer to function as a waveform image generation display unit that displays on the display unit,
In conjunction with the enlarged display of the captured image by the enlarged display means, generates a waveform image the waveform image generating display means, have a mode for displaying,
After the enlarged display of the captured image by the enlarged display means is canceled and the display returns to the display of the normal captured image, the display control means clearly shows the area that has been enlarged and displayed for a predetermined time, The waveform image generation and display means generates and displays a waveform image based on the edge component of the area that has been enlarged and displayed so that a waveform image based on the edge component outside the area can be visually discriminated. A program characterized by

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