JP2010041598A - Imaging apparatus, and control method and control program for the same - Google Patents

Imaging apparatus, and control method and control program for the same Download PDF

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Publication number
JP2010041598A
JP2010041598A JP2008204574A JP2008204574A JP2010041598A JP 2010041598 A JP2010041598 A JP 2010041598A JP 2008204574 A JP2008204574 A JP 2008204574A JP 2008204574 A JP2008204574 A JP 2008204574A JP 2010041598 A JP2010041598 A JP 2010041598A
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Japan
Prior art keywords
step
subject
means
image
face
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Pending
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JP2008204574A
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Japanese (ja)
Inventor
Satoshi Aoyama
Hiroyuki Ogino
宏幸 荻野
聡 青山
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Canon Inc
キヤノン株式会社
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Priority to JP2008204574A priority Critical patent/JP2010041598A/en
Publication of JP2010041598A publication Critical patent/JP2010041598A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of automatically switching display formats of a frame for a face of an object after AF processing, depending on the photographic condition. <P>SOLUTION: The imaging apparatus includes an image display means, a focusing means, an object's feature portion detection means, a control means to display an index indicating the detected feature portion, a means for selecting the feature portion in a focused state, and a photographic condition setup means. The imaging apparatus displays frames on both a focused face and an unfocused face at an image display section, when a self-timer face photographing mode is to be set up, and displays a frame only on the focused face, even if for a completely identical object at the image display section, when self-timer face photographic mode is not set up. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an imaging apparatus such as a digital camera, an imaging apparatus control method, and a control program.

  Some digital cameras have a face detection function for detecting a human face from a screen displayed on a display unit such as a liquid crystal display. Using this face detection function, a face within the angle of view can be detected, and AF (automatic focusing) and AE (automatic exposure) can be appropriately performed on the detected face.

During AF using face detection, a face that is in focus for the user is displayed by superimposing a frame on the screen of the display unit to match the face in focus and the face within the depth of field. Has been proposed (Patent Document 1).
JP 2007-274587 A

  Incidentally, there is a self-timer shooting mode as a shooting mode of the digital camera. The self-timer shooting mode is a shooting method in which a shooting operation is performed after an arbitrary number of seconds elapses after the release button is pressed.

  By photographing in the self-timer photographing mode, the photographer himself can enter the angle of view within an arbitrary number of seconds, and the photographer himself can photograph as a subject.

  As an application of the face detection function, there is a face self-timer shooting mode in which the face detection function is used for self-timer shooting. The face self-timer shooting mode is a shooting mode in which shooting is started due to a change in the number of human faces detected within the angle of view.

  In the self-timer shooting mode, after the photographer sets the face self-timer shooting mode, first, the number of faces detected within the angle of view when the release button is pressed is stored. Thereafter, face detection is repeatedly executed, and when the number of faces detected within the angle of view increases, photographing is automatically performed.

  Thus, for example, it is possible to automatically perform photographing when the photographer himself enters the screen without waiting for an arbitrary number of seconds.

  However, in this face self-timer shooting mode, the display format on the display unit after AF is frame-displayed only on the in-focus face and the face within the depth of field, as in Patent Document 1. In such a case, the following problems occur.

  That is, the user cannot recognize the number of faces actually detected in the screen, which is an important element for photographing in the face self-timer photographing mode. For this reason, only the faces displayed in the frame are erroneously recognized as the number of detected faces.

  Accordingly, an object of the present invention is to provide an imaging apparatus, an imaging apparatus control method, and a control program capable of automatically switching the display format of an indicator for a characteristic part of a subject after AF processing according to imaging conditions. To do.

  In order to achieve the above object, an imaging apparatus according to the present invention includes an image display unit that displays a subject image based on captured image data, a focusing unit that performs a focusing process on the subject image, Detection means for detecting a characteristic part of a subject from image data; and control means for controlling to display an index indicating the characteristic part of the subject detected by the detection means in the image displayed on the image display means; A selection means for selecting a characteristic part in focus among the characteristic parts of the subject detected by the detection means; and a setting means for setting an imaging condition based on an operation by a user. , A process of displaying the index on a characteristic part of the subject selected by the selection unit according to the imaging condition set by the setting unit, and a detection unit Switching between processing for displaying the indicators characteristic site of all objects, characterized in that.

  An image pickup apparatus control method according to the present invention includes: an image display step for displaying an image of a subject based on captured image data; a focusing step for performing a focusing process on the image of the subject; A detection step for detecting a characteristic part; a control step for controlling to display an index indicating the characteristic part of the subject detected in the detection step in the image displayed in the image display step; and a detection in the detection step A selection step for selecting a feature portion that is in focus among the feature portions of the subject that has been focused, and a setting step for setting an imaging condition based on an operation by a user, wherein the control step includes: A process of displaying the index on a characteristic part of the subject selected in the selection step according to the set imaging condition; Tsu switching between processing for displaying the indicators characteristic site of all objects detected by the flop, characterized in that.

  The control program of the imaging apparatus of the present invention includes an image display step for displaying an image of a subject based on the captured image data, a focusing step for performing a focusing process on the image of the subject, A detection step for detecting a characteristic part; a control step for controlling to display an index indicating the characteristic part of the subject detected in the detection step in the image displayed in the image display step; and a detection in the detection step This is a control program for an imaging apparatus that causes a computer to execute a selection step for selecting a characteristic part in a focused state among the characteristic parts of a subject that has been focused and a setting step for setting an imaging condition based on an operation by a user. The control step is selected in the selection step in accordance with the shooting conditions set in the setting step. A process of displaying the indicator on the characteristic site of the subject was, switches between processing for displaying the indicators characteristic site of all objects detected by the detection step, characterized in that.

  According to the present invention, in accordance with the photographing conditions, the display of the index when only the in-focus state of the characteristic part of the subject after AF processing is necessary, and all the subjects detected in the screen together with the in-focus state are displayed. It is possible to automatically switch between displaying an index when it is necessary to recognize a characteristic part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram for explaining a device configuration of a digital camera which is a first embodiment of an imaging device of the present invention.

  As shown in FIG. 1, in the digital camera 100 of the present embodiment, subject light that has passed through a photographing lens 10 is converted into an electrical signal by an image sensor 14, and an analog signal output from the image sensor 14 is converted into an A / D converter. 16 is converted into a digital signal. A shutter 12 having a diaphragm function is disposed between the photographing lens 10 and the image sensor 14.

  The timing generation circuit 18 is controlled by the memory control circuit 22 and the system control circuit 50, and supplies a clock signal and a control signal to the image sensor 14, the A / D converter 16, and the D / A converter 26.

  The image processing circuit 20 performs predetermined pixel interpolation processing and color conversion processing on the data from the A / D converter 16 or the data from the memory control circuit 22. Further, the image processing circuit 20 performs predetermined calculation processing using the captured image data.

  Based on the obtained calculation result, the system control circuit 50 performs TTL (through-the-lens) AF processing, AE processing, EF (flash) on the exposure control means 40 and the distance measurement control means 42. Controls such as pre-flash processing.

  Further, the image processing circuit 20 performs predetermined arithmetic processing using the captured image data, and also performs TTL AWB (auto white balance) processing based on the obtained arithmetic result.

  The memory control circuit 22 controls the A / D converter 16, the timing generation circuit 18, the image processing circuit 20, the image display memory 24, the D / A converter 26, the memory 30, and the compression / decompression circuit 32. Data output from the A / D converter 16 is written into the image display memory 24 or the memory 30 via the image processing circuit 20 and the memory control circuit 22 or directly via the memory control circuit 22.

  The image display unit 28 includes a TFT, an LCD, and the like, and the display image data written in the image display memory 24 is displayed via the D / A converter 26. Note that if the image data captured using the image display unit 28 is sequentially displayed, the electronic viewfinder function can be realized.

  The image display unit 28 can arbitrarily turn on / off the display according to an instruction from the system control circuit 50 based on the operation of the image display ON / OFF switch 66. When the display is turned off, the digital camera 100 power consumption can be reduced.

  The memory 30 stores captured still images and moving images, and has a sufficient storage capacity to store a predetermined number of still images and a predetermined time of moving images. Thereby, even in the case of continuous shooting or panoramic shooting in which a plurality of still images are continuously shot, it is possible to write a large amount of images to the memory 30 at high speed. The memory 30 can also be used as a work area for the system control circuit 50.

  The compression / decompression circuit 32 is a circuit that compresses and decompresses image data by adaptive discrete cosine transform (ADCT) or the like. The compression / decompression circuit 32 reads image data stored in the memory 30, performs compression processing or decompression processing, and writes the processed data to the memory 30.

  The exposure control means 40 controls the shutter 12 having a diaphragm function, and also has a flash light control function in cooperation with the flash 48.

  The distance measurement control means 42 controls the focusing of the photographing lens 10, the zoom control means 44 controls the zooming of the photographing lens 10, and the barrier control means 46 controls the operation of the protection means 103 that is a barrier. The flash 48 has an AF auxiliary light projecting function and a flash light control function.

  The exposure control means 40 and the distance measurement control means 42 are controlled using the TTL method, and the system control circuit 50 controls the exposure control means 40 and the distance measurement control based on the calculation result obtained by calculating the captured image data by the image processing circuit 20. The means 42 is controlled.

  The system control circuit 50 controls the entire digital camera 100. The memory 52 stores constants, variables, programs, and the like for operating the system control circuit 50.

  The display unit 54 displays an operation state, a message, and the like using characters, images, sounds, and the like according to the execution of the program in the system control circuit 50.

  The display unit 54 is installed at a single or a plurality of positions near the operation unit of the digital camera 100 so as to be easily visible, and is configured by a combination of, for example, an LCD, an LED, and a sounding element. In addition, a part of the function of the display unit 54 is displayed in the optical viewfinder 104.

  Among the display contents of the display unit 54, what is displayed on the LCD or the like includes single shot / continuous shooting display, self-timer display, compression rate display, number of recorded pixels, number of recorded pixels, number of remaining images that can be captured, shutter There are speed display, aperture value display, exposure compensation display, and so on.

  Among the display contents of the display unit 54, what is displayed on the LCD or the like includes flash display, red-eye reduction display, macro shooting display, buzzer setting display, clock battery remaining display, battery remaining display, error display, etc. There is.

  Further, among the display contents of the display unit 54, what is displayed on the LCD or the like is information display with a plurality of digits, display of the attachment / detachment status of the external recording medium 200, communication I / F operation display, date / time display, etc. There is.

  On the other hand, among the display contents of the display unit 54, what is displayed in the optical viewfinder 104 includes in-focus display, camera shake warning display, flash charge display, shutter speed display, aperture value display, exposure correction display, and the like.

  The nonvolatile memory 56 is an electrically erasable / recordable memory, and for example, an EEPROM or the like is used.

  The various switches 60, 62, 64, 66, 68 and the operation unit 70 are operation means for inputting various operation instructions of the system control circuit 50. The operation means is composed of one or a plurality of combinations such as a switch, a dial, a touch panel, pointing by eye-gaze detection, and a voice recognition device.

  The mode dial switch 60 switches and sets various function modes such as power-off, automatic shooting mode, shooting mode, panoramic shooting mode, playback mode, multi-screen playback / erase mode, and PC connection mode.

  The shutter switch (SW1) 62 is turned ON during operation of a shutter button (not shown), and instructs to start operations such as AF processing (focus processing), AE processing, AWB processing, and EF processing.

  The shutter switch (SW2) 64 is turned on when the operation of a shutter button (not shown) is completed, and exposure is performed so that a signal read from the image pickup device 12 is written into the memory 30 via the A / D converter 16 and the memory control circuit 22. Instructs the start of processing operation.

  The shutter switch (SW2) 64 reads the image data from the development process by the calculation in the image processing circuit 20 or the memory control circuit 22, the memory 30, compresses it in the compression / decompression circuit 32, and stores the image on the external recording medium 120 or the like. Instructs the start of the recording process to write data.

  The image display ON / OFF switch 66 can set ON / OFF of the image display unit 28. With this function, when photographing using the optical viewfinder 104, it is possible to save power by cutting off the current supply to the image display unit 28 such as TFT or LCD.

  The quick review ON / OFF switch 68 sets a quick review function for automatically reproducing image data taken immediately after photographing. In the present embodiment, it is assumed that a function for setting the quick review function is provided particularly when the image display unit 28 is turned off.

  The operation unit 70 includes various buttons, a touch panel, and the like, and includes a menu button, a set button, a macro button, a multi-screen playback page break button, a flash setting button, a single shooting / continuous shooting / self-timer switching button, and menu movement + (plus). There are buttons.

  Further, the operation unit 70 includes a menu movement- (minus) button, a reproduction image movement + (plus) button, a reproduction image- (minus) button, a shooting image quality selection button, an exposure correction button, a date / time setting button, and the like. .

  The power supply control means 80 includes a battery detection circuit, a DC-DC converter, a switch circuit that switches a block to be energized, and the like. The power supply control means 80 detects the presence / absence of a battery, the type of battery, the remaining battery level, controls the DC-DC converter based on the detection result and an instruction from the system control circuit 50, and supplies a necessary voltage for a necessary period. , And supplied to each unit including the external recording medium 120.

  The power source 86 is a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a NiCd battery, NiMH battery, or Li battery, an AC adapter, or the like, and is connected to the power control means 80 via connectors 82 and 84.

  The card controller 90 transmits / receives data to / from an external recording medium 120 such as a memory card connected via the connector 92. The I / F 91 is an interface of the external recording medium 120, and the recording medium attachment / detachment detection unit 98 detects whether or not the external recording medium 120 is connected to the connector 92.

  Note that the interface and connector of the external recording medium may have a single or a plurality of systems, any number of systems. Moreover, it is good also as a structure provided with combining the interface and connector of a different standard. The interface and the connector may be configured using a PCMCIA card, a CF (Compact Flash (registered trademark)) card, or the like that conforms to a standard.

  Further, when the I / F 91 and the connector 92 are configured in conformity with a standard such as a PCMCIA card or a CF card, image data can be transferred between peripheral devices such as other PCs and printers by connecting various communication cards. And management information attached to image data can be transferred. Examples of the various communication cards include communication cards such as a LAN card, a modem card, a USB card, an IEEE 1394 card, a P1284 card, a SCSI card, and a PHS.

  The face detection unit 101 analyzes the image data processed by the image processing circuit 20 and the image data stored in the image display memory 24, and detects an area considered to be a face in the image data. When the face detection unit 101 detects a region that seems to be a face, the face detection unit 101 outputs a probability that the face is likely to be a human face, a position in the input image data, a size, and the like. Further, the face detection unit 101 can output the feature amount of each feature point of the detected face.

  The image comparison unit 102 performs image pattern matching on the two images recorded in the image display memory 24 and the memory 30 based on the color information, and detects a gap between the images. The protection unit 103 is a barrier that prevents the imaging unit from being stained or damaged by covering the imaging unit including the photographing lens 10. The communication unit 110 performs wireless communication with other devices via an antenna connected to the communication connector 111.

  Next, with reference to FIG. 2, a photographing process of the digital camera 100 of the present embodiment will be described. 2 is executed by the CPU or the like of the system control circuit 50 after a program stored in the ROM or the like is loaded into the RAM.

  In step S <b> 201, the system control circuit 50 determines whether the face self-timer shooting mode is set through a menu button or a setting button (not shown) included in the operation unit 70 from the user.

  The system control circuit 50 proceeds to step S202 when the face self-timer shooting mode is set, and proceeds to step S203 when the setting is not performed.

  In step S202, the system control circuit 50 stores the face self-timer shooting mode, and proceeds to step S203.

  In step S203, the system control circuit 50 performs face detection processing by the face detection unit 101 using the image data output from the image sensor 14 or display data stored in the image display memory 24 as input image data. The process proceeds to step S204.

  Here, if a face is detected from the input image data, the system control circuit 50 uses the probability, size, etc. of each face output from the face detection unit 101 to detect the main face from the detected faces. Select faces that can be subjects.

  In step S204, the system control circuit 50 determines whether or not the shutter switch (SW1) 62 has been pressed. If it has not been pressed, the process returns to step S201, and if it has been pressed, the process proceeds to step S205.

  In step S205, the system control circuit 50 performs AF processing.

  Here, with reference to FIG. 3, the AF process in step S205 of FIG. 2 will be described.

  In FIG. 3, in step S301, the system control circuit 50 moves the taking lens 10 to the scan start position by the distance measurement control means 42, and proceeds to step S302.

  Scanning here refers to moving the photographing lens 10 in the optical axis direction over a predetermined range and storing a focus evaluation value, which will be described later, in association with the lens position. This scan start position is, for example, the infinite end of the focusable area.

  In step S302, the system control circuit 50 sets a distance measurement frame based on the position and size of the face detected in step S203 of FIG. 2, and proceeds to step S303.

  In step S303, the system control circuit 50 converts the analog video signal output from the image sensor 14 into a digital signal by the A / D converter 16, and extracts a high-frequency component of the luminance signal from the output by the image processing circuit 20. This is stored in the memory 52 as a focus evaluation value.

  At this time, the system control circuit 50 calculates a focus evaluation value for each of the distance measurement frames set in step S302 using the video signal in the distance measurement frame, stores the focus evaluation value in the memory 52, and proceeds to step S304.

  In step S304, the system control circuit 50 acquires the current position of the taking lens 10 and stores it in the memory 52, and the process proceeds to step S305. When a stepping motor is used for the distance measurement control means 42, the position of the taking lens 10 is determined by the number of relative driving pulses from the initial position detected by a photo interrupter (not shown). Further, the absolute position of the taking lens 10 may be measured using a rotary encoder (not shown).

  In step S305, the system control circuit 50 determines whether the current position of the photographic lens 10 is equal to the scan end position. If it is determined that the current position is the same, the process proceeds to step S307. The scan end position is, for example, the closest end of the focusable area.

  In step S306, the system control circuit 50 moves the photographic lens 10 by a predetermined amount in the scanning end direction by the distance measurement control means 42, and returns to step S303.

  In step S307, the system control circuit 50 calculates the maximum one of the focus evaluation values stored in step S303 from the focus evaluation values of the distance measurement frame set to the main face position (hereinafter referred to as the main face frame). Then, the process proceeds to step S308. Note that one main face is determined by determining the position and size of the face from the faces detected in step S203 of FIG.

  In step S308, the system control circuit 50 stores the position of the photographing lens 10 (hereinafter referred to as a peak position) when the maximum focus evaluation value calculated in step S307 is acquired in the memory 52, and the process proceeds to step S309.

  In step S309, the system control circuit 50 stores the distance measurement frame index as 0 in the memory 52, and proceeds to step S310.

  For example, as shown in FIG. 4, the distance measurement frame index has three faces detected in step S203 in FIG. 2, and a distance measurement frame is set for each face. In this case, each distance measuring frame is used for identification.

  In the processing described below, frames other than the main face frame are numbered in order, such as 0, 1,..., And processing is performed for distance measurement frames having numbers corresponding to the distance measurement frame index. Further, the distance measurement frame index number and the distance measurement frame index number 0 are set such that the distance measurement frame corresponding to the distance measurement frame index 0 is the distance measurement frame 0, and the distance measurement frame corresponding to the distance measurement frame index 1 is the distance measurement frame 1. The numbers are called in association with each other.

  In step S310, the system control circuit 50 calculates the maximum focus evaluation value of the distance measurement frame corresponding to the currently set distance measurement frame index, and proceeds to step S311.

  In step S311, the system control circuit 50 stores the peak position of the distance measurement frame calculated in step S310 in the memory 52, and proceeds to step S312.

  In step S312, the system control circuit 50 adds 1 to the currently stored distance measuring frame index, and proceeds to step S313.

  In step S313, the system control circuit 50 determines whether or not the currently stored distance measurement frame index is equal to the face number −1 detected in step S203 of FIG. 2, and proceeds to step S314 if they are equal. Return to S310.

  The reason why the distance measurement frame index is compared with the number of faces detected in step S203 in FIG. 2 is that the main face frame cannot be included in the number of distance measurement frame indexes.

  In step S314, the system control circuit 50 moves the photographing lens 10 to the peak position stored in step S308 by the distance measurement control unit 42, ends the AF process, and proceeds to step S206 in FIG.

  Returning to FIG. 2, in step S206, the system control circuit 50 performs a focus state display process.

  Here, with reference to FIG. 5, the in-focus state display process in step S206 of FIG. 2 will be described.

  First, in step S501, the system control circuit 50 stores the distance measurement frame index as 0 in the memory 52, and proceeds to step S502. This distance measurement frame index is the same as that described with reference to FIG. 4 in step S309 of FIG.

  In step S502, the system control circuit 50 determines the peak position stored in step S308 in FIG. 3 (hereinafter referred to as the main face peak position) and the peak position of the distance measurement frame corresponding to the currently set distance measurement frame index. And determine whether the difference is equal to or less than a predetermined value.

  Then, the system control circuit 50 proceeds to step S503 if the difference is equal to or smaller than a predetermined value, and proceeds to step S504 if the difference is not smaller than the predetermined value.

  The predetermined value at this time is a value obtained by converting the depth of focus into the moving amount of the photographing lens 10. For example, when a stepping motor is used for the distance measurement control means 42, the depth of focus is set to a value converted to the number of driving steps of the stepping motor.

  In step S503, the system control circuit 50 selects the focus frame index currently set as the focus OK, stores it in the memory 52, and proceeds to step S504.

  In step S504, the system control circuit 50 adds 1 to the distance measurement frame index currently stored, and proceeds to step S505.

  In step S505, the system control circuit 50 determines whether or not the currently stored distance measurement frame index is equal to the face number −1 detected in step S203 of FIG. 2, and if equal, proceeds to step S506, otherwise. The process returns to step S502.

  The reason why the distance measurement frame index is compared with the number of faces detected in step S203 in FIG. 2 is that the main face frame cannot be included in the number of distance measurement frame indexes.

  In step S506, the system control circuit 50 displays a frame at the face position corresponding to the distance measurement frame stored in the memory 52 as the focus OK in step S503 in the image display unit 28, and the process proceeds to step S507.

  In step S507, the system control circuit 50 determines whether or not the current operation mode is the face self-timer shooting mode. If the current mode is the face self-timer shooting mode, the process proceeds to step S508. Otherwise, the process ends. Then, the process proceeds to step S207 in FIG.

  In step S508, in addition to the frame displayed in step S506, the system control circuit 50 sets the face position corresponding to the distance measurement frame other than the frame stored in the memory 52 as the focus OK in step S503. Display a frame.

  At this time, the system control circuit 50 changes the color of the frame displayed on the image display unit 28 in steps S506 and S508. For example, the frame displayed in step S506 is green, and the frame displayed in step S508 is white.

  Note that the display form of the frame may be changed instead of the color. For example, the frame displayed in step S506 is drawn with a solid line, and the frame displayed in step S508 is drawn with a dotted line. Further, one or both of the frame displayed in step S506 and the frame displayed in step S508 may be blinked. To make both frames blink, change the blinking cycle so that they can be visually distinguished. Further, the number of frames displayed at the same time may be displayed together on the image display unit 28 to notify the user.

  In this manner, the frame display on the image display unit 28 after the AF process can be changed depending on whether or not the face self-timer shooting mode is set.

  That is, when the face self-timer shooting mode is set, the image display unit 28 displays frames on both the focused face and the non-focused face as shown in FIG.

  On the other hand, when the face self-timer shooting mode is not set, even if the subject is exactly the same as in FIG. 8A, only the focused face is displayed on the image display unit 28 as shown in FIG. 8B. A frame appears on the screen.

  Returning to FIG. 2, in step S207, the system control circuit 50 stores the number n of the number of all faces detected in step S203, and proceeds to step S208.

  In step S208, the system control circuit 50 determines whether or not the shutter switch (SW2) 64 has been pressed. If it has been pressed, the system control circuit 50 proceeds to step S210. If not, the system control circuit 50 proceeds to step S209.

  In step S209, the system control circuit 50 determines whether or not the shutter switch (SW1) 62 remains pressed. If the shutter switch (SW1) 62 remains pressed, the process returns to step S208, and the shutter switch (SW1) 62 has been released. Returns to step S201.

  In step S210, the system control circuit 50 determines whether or not the current shooting mode is the face self-timer shooting mode. If the face self-timer shooting mode is not set, the system control circuit 50 proceeds to step S214 and performs shooting processing.

  Thereafter, the system control circuit 50 proceeds to step S215, records the photographed image data on the external recording medium 120, and ends the photographing process.

  On the other hand, if the current shooting mode is the face self-timer shooting mode in step S210, the system control circuit 50 proceeds to step S211.

  In step S211, the system control circuit 50 performs face detection processing by the face detection unit 101, as in step S203, and proceeds to step S212.

  In step S212, the system control circuit 50 determines whether or not the number of faces detected in step S211 exceeds the number n of faces stored in step S207. If it exceeds, the process proceeds to step S213. Returning to step S211, the above process is repeated.

  In step S213, the system control circuit 50 executes the AF process again in the same manner as in step S205, and proceeds to the shooting process in step S214. Thereafter, the image data shot in step S215 is stored in the external recording medium 120 or the like. Record and finish the shooting process.

  As described above, in the present embodiment, when the face self-timer shooting mode is set, the image display unit 28 displays frames on both the focused face and the non-focused face. It is possible to easily confirm whether or not the faces of all the persons who have been detected correctly.

  When the face self-timer shooting mode is not set, the frame is displayed only on the focused face on the image display unit 28, so that the photographer can easily determine the focused state.

(Second Embodiment)
Next, a digital camera which is a second embodiment of the imaging apparatus of the present invention will be described with reference to FIGS. The apparatus configuration of the digital camera according to the present embodiment is the same as that of the first embodiment, and will be described using the reference numerals.

  FIG. 6 is a flowchart for explaining the photographing process of the digital camera of the present embodiment. 6 is executed by the CPU of the system control circuit 50 after the program stored in the ROM or the like is loaded into the RAM.

  In step S <b> 601, the system control circuit 50 determines whether or not a setting for executing the red-eye correction process is performed immediately after the shooting process through a menu button or a setting button (not illustrated) included in the operation unit 70 by a user operation. .

  The system control circuit 50 proceeds to step S602 when execution of the red-eye correction process is set, and proceeds to step S603 when it is not set.

  In step S602, the system control circuit 50 stores the setting for red-eye correction processing immediately after the shooting processing, and proceeds to step S603.

  In step S603, the system control circuit 50 performs face detection processing by the face detection unit 101 using the image data output from the image sensor 14 or display data stored in the image display memory 24 as input image data, The process proceeds to step S604.

  Here, when a face is detected from the input image data, the system control circuit 50 uses the probability, size, etc. of each face output from the face detection unit 101 to detect the face from the detected faces. Select faces that can be subjects.

  In step S604, the system control circuit 50 determines whether or not the shutter switch (SW1) 62 has been pressed. If it has not been pressed, the process returns to step S601. If it has been pressed, the process proceeds to step S605.

  In step S605, the system control circuit 50 performs AF processing, and proceeds to step S606. Since the AF process is the same as that described in step S205 of FIG. 2 of the first embodiment, the description thereof is omitted.

  In step S606, the system control circuit 50 performs a focus state display process.

  Here, with reference to FIG. 7, the focus state display processing in step S606 of FIG. 6 will be described.

  First, in step S701, the system control circuit 50 stores the distance measurement frame index as 0 in the memory 52, and proceeds to step S702. This distance measurement frame index is the same as that described with reference to FIG. 4 in step S309 of FIG.

  In step S702, the system control circuit 50 obtains the difference between the main face peak position stored in step S308 in FIG. 3 and the peak position of the distance measurement frame corresponding to the currently set distance measurement frame index.

  The system control circuit 50 proceeds to step S703 if the difference is less than or equal to a predetermined value, and proceeds to step S704 if the difference is not less than the predetermined value. The predetermined value at this time is a value obtained by converting the depth of focus into the moving amount of the photographing lens 10. For example, when a stepping motor is used for the distance measurement control means 42, the depth of focus is set to a value converted to the number of driving steps of the stepping motor.

  In step S703, the system control circuit 50 selects the focus frame index currently set as in-focus OK, stores it in the memory 52, and proceeds to step S704.

  In step S704, the system control circuit 50 adds 1 to the currently stored distance measurement frame index, and proceeds to step S705.

  In step S705, the system control circuit 50 determines whether or not the currently stored distance measurement frame index is equal to the face number −1 detected in step S603 in FIG. 6. If equal, the process proceeds to step S706. Returns to step S702.

  Here, the distance measurement frame index is compared with the number of faces detected in step S603 in FIG. 6 because the main face frame cannot be included in the number of distance measurement frame indexes.

  In step S706, the system control circuit 50 displays a frame at the face position corresponding to the distance measurement frame stored in the memory 52 as the focus OK in step S703 in the image display unit 28, and the process proceeds to step S707.

  In step S707, the system control circuit 50 determines whether or not the current setting for red-eye correction processing is valid. If the setting for red-eye correction processing is valid, the process proceeds to step S708, and if it is not valid. The process ends.

  In step S708, in addition to the frame displayed in step S706, the system control circuit 50 sets the face position corresponding to the distance measurement frame other than the frame stored in the memory 52 as the focus OK in step S703. Display a frame.

  At this time, the system control circuit 50 changes the color of the frame displayed on the image display unit 28 in steps S706 and S708. For example, the frame displayed in step S706 is green, and the frame displayed in step S708 is white.

  Note that the display form of the frame may be changed instead of the color. For example, the frame displayed in step S706 is drawn with a solid line, and the frame displayed in step S708 is drawn with a dotted line. Further, one or both of the frame displayed in step S706 and the frame displayed in step S708 may be blinked. To make both frames blink, change the blinking cycle so that they can be visually distinguished.

  In this way, the frame display on the image display unit 28 after the AF process can be changed depending on whether or not the red-eye correction setting is enabled.

  That is, when the setting of red-eye correction processing is enabled, frames are displayed on both the focused face and the non-focused face as shown in FIG.

  On the other hand, when the red-eye correction process is not set, a frame is displayed only on the focused face as shown in FIG. 8B even if the subject is exactly the same as that in FIG.

  Returning to FIG. 6, in step S607, the system control circuit 50 stores the number n of the number of all faces detected in step S603, and proceeds to step S608.

  In step S608, the system control circuit 50 determines whether or not the shutter switch (SW2) 64 has been pressed. If the shutter switch (SW2) 64 has been pressed, the process proceeds to step S610. If not, the process proceeds to step S609.

  In step S609, the system control circuit 50 determines whether or not the shutter switch (SW1) 62 remains pressed. If the shutter switch (SW1) 62 remains pressed, the process returns to step S608, and the shutter switch (SW1) 62 has been released. Returns to step S601.

  In step S610, the system control circuit 50 performs shooting processing, and proceeds to step S611.

  In step S611, the system control circuit 50 determines whether the setting of the red-eye correction process is valid. If not, the system control circuit 50 records the image captured in step S613 and ends the process.

  On the other hand, if the setting for red-eye correction processing is valid in step S611, the system control circuit 50 selects a face with red eyes from the detected face for the captured image and performs red-eye correction in step S612. Later, in step S613, an image is recorded, and the process ends.

  As described above, in the present embodiment, when the setting of the red-eye correction process is valid, the image display unit 28 displays frames on both the focused face and the non-focused face. Thereby, it is possible to easily confirm whether or not it is a candidate to be corrected even if it becomes red-eye after photographing.

  In addition, when the red-eye correction process is not set, the frame is displayed only on the focused face in the image display unit 28, so that the photographer can easily determine the focused state.

  In addition, this invention is not limited to what was illustrated by said each embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.

  The object of the present invention can also be achieved by executing the following processing. That is, a storage medium in which a program code of software that realizes the functions of the above-described embodiments is supplied to a system or apparatus, and a computer (or CPU or MPU) of the system or apparatus is stored in the storage medium. This is the process of reading the code.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code and the storage medium storing the program code constitute the present invention.

  Moreover, the following can be used as a storage medium for supplying the program code. For example, floppy (registered trademark) disk, hard disk, magneto-optical disk, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW, magnetic tape, nonvolatile memory card, ROM or the like. Alternatively, the program code may be downloaded via a network.

  Further, the present invention includes a case where the function of the above embodiment is realized by executing the program code read by the computer. In addition, an OS (operating system) running on the computer performs part or all of the actual processing based on an instruction of the program code, and the functions of the above-described embodiments are realized by the processing. Is also included.

  Furthermore, a case where the functions of the above-described embodiment are realized by the following processing is also included in the present invention. That is, the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Thereafter, based on the instruction of the program code, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing.

It is a block diagram for demonstrating the apparatus structure of the digital camera which is 1st Embodiment of the imaging device of this invention. It is a flowchart figure for demonstrating the imaging | photography process of a digital camera. It is a flowchart for demonstrating the AF process in step S205 of FIG. It is explanatory drawing for demonstrating a ranging frame index. It is a flowchart for demonstrating the focus state display process of step S206 of FIG. It is a flowchart figure for demonstrating the imaging | photography process of the digital camera which is 2nd Embodiment of the imaging device of this invention. FIG. 7 is a flowchart for explaining an in-focus state display process in step S606 in FIG. 6. It is a figure which shows the example of a display of the frame in an image display part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shooting lens 12 Shutter 14 Image pick-up element 16 A / D converter 18 Timing generation circuit 20 Image processing circuit 22 Memory control circuit 24 Image display memory 26 D / A converter 28 Image display part 30 Memory 32 Image compression / expansion circuit 40 Exposure Control means 42 Distance control means 44 Zoom control means 46 Barrier control means 48 Flash 50 System control circuit 52 Memory 54 Display unit 56 Non-volatile memory 60 Mode dial switch 62 Shutter switch SW1
64 Shutter switch SW2
66 Image display ON / OFF switch 68 Quick review ON / OFF switch 70 Operation unit 80 Power control means 82 Connector 84 Connector 86 Power supply 90 Card controller 91 Interface 92 Connector 98 Recording medium attachment / detachment detection means 100 Digital camera 101 Face detection unit 102 Image comparison Part 103 protection means 104 optical finder 110 communication part 111 communication connector 120 external recording medium

Claims (6)

  1. Image display means for displaying an image of a subject based on the captured image data;
    Focusing means for performing focusing processing on the image of the subject;
    Detecting means for detecting a characteristic part of the subject from the image data;
    Control means for controlling to display an index indicating the characteristic part of the subject detected by the detection means in the image displayed on the image display means;
    A selection means for selecting a feature part in a focused state among the feature parts of the subject detected by the detection means;
    Setting means for setting shooting conditions based on an operation by a user,
    The control means includes a process of displaying the index on the characteristic part of the subject selected by the selection means according to the imaging conditions set by the setting means, and the characteristics of all the subjects detected by the detection means An imaging apparatus characterized by switching between processing for displaying the index on a part.
  2.   The control means displays the number of all subjects in the image displayed on the image display means in conjunction with the process of displaying the index on the characteristic parts of all subjects detected by the detection means. The imaging apparatus according to claim 1.
  3.   Whether or not the characteristic part of the subject is a person's face and the photographing condition is a photographing mode in which photographing is started due to a change in the number of human faces detected by the detecting means. The imaging apparatus according to claim 1, wherein the imaging apparatus is provided.
  4.   3. The feature according to claim 1, wherein the characteristic part of the subject is a human face, and the shooting condition is whether or not to execute a red-eye correction process for the human face after the shooting process. Imaging device.
  5. An image display step for displaying an image of the subject based on the captured image data;
    A focusing step for performing a focusing process on the image of the subject;
    A detection step of detecting a characteristic part of the subject from the image data;
    A control step for controlling to display an index indicating the characteristic part of the subject detected in the detection step in the image displayed in the image display step;
    A selection step of selecting a feature portion that is in focus among the feature portions of the subject detected in the detection step;
    A setting step for setting shooting conditions based on a user operation,
    The control step includes a process of displaying the index on the characteristic part of the subject selected in the selection step according to the imaging condition set in the setting step, and the features of all subjects detected in the detection step. A method for controlling an imaging apparatus, wherein the process of displaying the index on a part is switched.
  6. An image display step for displaying an image of the subject based on the captured image data;
    A focusing step for performing a focusing process on the image of the subject;
    A detection step of detecting a characteristic part of the subject from the image data;
    A control step for controlling to display an index indicating the characteristic part of the subject detected in the detection step in the image displayed in the image display step;
    A selection step of selecting a feature portion that is in focus among the feature portions of the subject detected in the detection step;
    A setting step for setting shooting conditions based on an operation by a user;
    The control step includes a process of displaying the index on the characteristic part of the subject selected in the selection step according to the imaging condition set in the setting step, and the features of all subjects detected in the detection step. A control program for an imaging apparatus, wherein a process for displaying the index on a part is switched.
JP2008204574A 2008-08-07 2008-08-07 Imaging apparatus, and control method and control program for the same Pending JP2010041598A (en)

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