JP2006339999A - Imaging apparatus - Google Patents

Imaging apparatus Download PDF

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Publication number
JP2006339999A
JP2006339999A JP2005161834A JP2005161834A JP2006339999A JP 2006339999 A JP2006339999 A JP 2006339999A JP 2005161834 A JP2005161834 A JP 2005161834A JP 2005161834 A JP2005161834 A JP 2005161834A JP 2006339999 A JP2006339999 A JP 2006339999A
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Japan
Prior art keywords
af
auxiliary light
strobe
mode
photographing
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Withdrawn
Application number
JP2005161834A
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Japanese (ja)
Inventor
Shigeo Fujishi
Kenji Nozawa
Kazuto Washio
重男 藤司
賢司 野澤
和人 鷲尾
Original Assignee
Fujifilm Holdings Corp
富士フイルムホールディングス株式会社
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Priority to JP2005161834A priority Critical patent/JP2006339999A/en
Publication of JP2006339999A publication Critical patent/JP2006339999A/en
Application status is Withdrawn legal-status Critical

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Abstract

An imaging device capable of easily photographing a sleeping baby or pet without waking up even for a camera beginner.
When photographing a sleeping baby, the photographing mode is set to the smooth kids mode. When the shutter button 19 is pressed halfway, if the brightness of the subject is determined to be low illuminance based on the photometric data, the near infrared LED 16 is allowed to emit AF auxiliary light, the shutter sound is prohibited, the strobe light is prohibited, AGC 60 Each gain-up setting is performed. When the shutter button 19 is fully pressed, the image pickup signal is read from the CCD 58 during the charge accumulation time corresponding to the shutter speed without emitting the strobe light, and passes through the AGC 60 and the A / D converter 62 to the digital signal processing circuit 63. Entered. The image data is compressed by the compression processing circuit 64 and then stored in the memory card 67 via the media controller 66.
[Selection] Figure 5

Description

  The present invention relates to an imaging apparatus, and more particularly to an imaging apparatus suitable for imaging a sleeping baby or pet.

  Imaging devices such as a digital camera and a camera-equipped mobile phone that convert an image signal output from a solid-state imaging device such as a CCD into a digital image and store the digital signal are well known. In such an image pickup apparatus, since an electronic shutter system is adopted, a mechanical shutter drive sound generated by a silver salt camera, that is, a so-called shutter sound is not generated as it is.

  In order to prevent mischievous shooting, a camera-equipped mobile phone always makes a pseudo shutter sound. In many early digital cameras, the shutter sound did not sound. However, in many recent digital cameras, the user can arbitrarily select whether or not the shutter sound is sounded. In addition, there has been proposed one that detects the environmental sound level and automatically adjusts the volume of the shutter sound in accordance with the level (for example, Patent Document 1).

On the other hand, many image pickup apparatuses are equipped with an autofocus (AF) mechanism, but there are models that automatically emit AF auxiliary light so that autofocus can be performed even when there is not enough brightness. As such AF auxiliary light, there is a type in which strobe light is continuously turned on a plurality of times before actual photographing or a light emitting diode is turned on.
JP 2004-96635 A

  By the way, when shooting a sleeping baby or pet, for example, if you make a shutter sound or emit AF assist light, the baby or pet will wake up with sound or light, and you will not be able to take the picture you want There is. In this regard, the above-mentioned Patent Document 1 is advantageous in a quiet environment where a baby is sleeping because the volume of the shutter sound is automatically reduced. However, the volume of the shutter sound is reduced even if the environmental sound level is low. Since there is a scene that does not need to be performed, it is not necessarily the best to automatically adjust the shutter sound according to the environmental sound level.

  In addition, when photographing a sleeping baby, it is only necessary to manually stop the AF auxiliary light emission or stop shutter sound generation each time, but for camera beginners such as young mothers, It is very difficult to perform such an operation, and it is currently necessary to shoot with default settings or to give up shooting.

  An object of the present invention is to provide an imaging apparatus that can easily photograph a sleeping baby or pet without waking up even for a camera beginner.

  An image pickup apparatus according to the present invention includes a strobe device that emits strobe light, an AF auxiliary light emitting device that emits AF auxiliary light for autofocus, and controls the strobe device and the AF auxiliary light emitting device, respectively. And a control unit having a photographing mode in which the emission of AF auxiliary light is prohibited.

  Also, a strobe device that emits strobe light, an AF visible auxiliary light emitting device that emits AF visible auxiliary light for autofocus mainly in the visible light wavelength region, and an autofocus mainly in the near infrared wavelength region AF near-infrared auxiliary light emitting device that emits AF near-infrared auxiliary light for use, and use of AF visible auxiliary light emitting device is prohibited during AF flash photography using the strobe device, and AF near-infrared auxiliary light emitting device is used And a control unit having a photographing mode.

  In addition, the image processing apparatus includes a sound effect generator that generates at least a shutter sound in a pseudo manner, and the control unit controls the sound effect generator to prohibit the generation of the shutter sound when the shooting mode is selected. To do.

  According to the imaging apparatus of the present invention, when a shooting mode in which the strobe light and the AF auxiliary light emitting device are controlled and the flash light and AF auxiliary light emission are prohibited is selected, even a camera beginner can sleep without waking up. You can easily shoot babies and pets.

  In addition, if you select a shooting mode that prohibits the use of AF visible auxiliary light emitting device during flash photography and uses AF near infrared auxiliary light emitting device, even a camera beginner can easily sleep babies and pets without waking up. Can shoot.

  In addition, when the shooting mode is selected, the sound effect generator is controlled to prevent the generation of shutter sound, so even a camera beginner can easily take a picture of a sleeping baby or pet without waking up.

  In FIG. 1 showing the appearance of an embodiment of the present invention, a photographing lens 11, a strobe light emitting unit 12, an autofocus (AF) auxiliary light projection window 13 and a light control sensor 14 are provided on the front surface of a digital camera 10. Yes. A zoom lens is applied to the photographing lens 11, and a CCD image sensor (hereinafter referred to as CCD) 58 (see FIG. 3) is disposed behind the photographing lens 11. Although not shown, a card slot for mounting a memory card 67 (see FIG. 5) is provided on the side of the camera on the left hand side.

  Behind the AF auxiliary light projection window 13 is a white light emitting diode (LED) 15 (see FIG. 5) that emits AF auxiliary light of visible light when performing contrast detection AF, and near infrared light. And a near-infrared LED 16 (see FIG. 5) that emits AF auxiliary light. The LEDs 15 and 16 are selectively driven by an LED control circuit 17 (see FIG. 5). The near-infrared light is light having a wavelength of 800 to 2500 nm and is invisible to the eyes of humans and pets, so there is no fear that sleeping babies and pets will be dazzled and wake up.

  In FIG. 2 showing the upper surface of the camera, a ring-shaped mode switching dial 18 for switching modes by rotating, a shutter button 19 provided at the center, and a power switch 20 are disposed. A part of the outer periphery of the mode switching dial 18 is provided with an operation knob 18a that is convex on the right hand side, and an instruction projection 18b that indicates various mode names on the power switch 20 side.

  The mode name is printed on the upper surface of the camera, and “SP” indicating a scene position mode in which an optimum setting can be made for the selected scene by selecting a shooting scene, and “AUTO” indicating a fully automatic mode in which all the camera is left to the camera. ”,“ M ”indicating the manual mode, and“ MOVIE ”indicating the moving image shooting mode.

  The shutter button 19 is configured in a two-stage manner, and AF and automatic exposure control (AE) are activated in a “half-pressed” state in which the shutter button 19 is lightly pressed and stopped to lock AF and AE. Further, the photographing is executed in a state of “full push” in which the push is further performed.

  In FIG. 3 showing the appearance of the back side of the digital camera 10, on the back side of the digital camera 10, there are a liquid crystal monitor 30, a zoom button 31, a multifunction cross button 32, a liquid crystal display button 34, a menu / execute button 35, a cancel / A return button 36 is provided. The liquid crystal monitor 30 is used as an electronic viewfinder at the time of shooting, and displays a preview image of the shot image, a reproduced image read from the memory card, and the like. The menu selection using the cross button 32 and the setting of various items in each menu are also performed using the display screen of the liquid crystal monitor 30.

  The zoom button 31 performs zooming in the telephoto (TELE) direction by pressing the right end portion 31a, and performs zooming in the wide-angle (WIDE) direction by pressing the left end portion 31b. The cross button 32 can input instructions in the corresponding four directions (up, down, left, right) by pressing one of the top, bottom, left, and right edges, and can select various setting items on the menu screen and It is used as an operation button for instructing change, and as means for instructing electronic zoom magnification adjustment and playback frame return / return.

  The menu / execution button 35 is used when transitioning from the normal screen to the menu screen in each mode, and is used when confirming the selection contents and instructing execution (confirmation) of processing. The cancel / return button 36 is used to cancel the item selected from the menu (cancel) or return to the previous operation state.

  When the mode switching dial 18 is operated to select, for example, a scene position mode, a “scene selection” screen 37 is displayed on the liquid crystal monitor 30 as shown in FIG. Tabs 1 and 2 each have six selection items for each scene, a total of 12 items. Tab 1 includes shooting mode 38, exposure correction 39, metering mode 40, white balance (WB) 41, and continuous shooting 42. , The setup (SET) 43 setting items are displayed side by side.

  When the shooting mode 38 is selected using the cross button 32, a sub menu 38a is displayed on the right side of the item column of the shooting mode 38. This sub-menu 38a includes N (natural mode) 44 for taking pictures of natural atmosphere without using a strobe, Kidds Zzz (suyasuya kids mode) 45 suitable for taking a sleeping baby, daytime buildings and mountains, etc. The items of a landscape mode 46 suitable for photographing a landscape, a sports mode 47 suitable for photographing a moving subject, and a night view mode suitable for photographing a sunset scene and a night scene are displayed side by side.

  For example, when the menu / execution button 35 is pressed after selecting the smooth kids mode 45 using the cross button 32 on the submenu 38a, the smooth kids mode 45 is displayed to the right of the shooting mode 38 icon on the tab 1. The characters “Kidds Zzz” are displayed and the submenu 38a is hidden.

  In FIG. 5 showing the electrical configuration of the digital camera 10, the CPU 50 controls each part of the main body of the digital camera 10 via the I / O bus 52 in accordance with various operation signals input from the operation unit 51. The operation unit 51 includes the mode switching dial 18, the shutter button 19, the power button 20, the zoom button 31, the multifunction cross button 34, the liquid crystal display button 36, and the like.

  The photographing lens 11 includes a lens 52 and a diaphragm 53. The lens 52 includes a front lens group that is a variator lens and a rear lens group that is a compensator lens having a focusing function. The lens 52 is driven by a lens driving mechanism 54 including a stepping motor to change the optical zoom magnification and adjust the focus. The aperture 53 is driven by an aperture drive mechanism 55 including a motor to switch the aperture diameter. The lens driving mechanism 54 and the aperture driving mechanism 55 are driven by motor drivers 56 and 57 controlled by the CPU 50.

  A CCD 58 is disposed behind the photographic lens 11. The CCD 58 is driven by a CCD drive unit 59. An optical image formed on the light receiving surface of the CCD 58 by the photographing lens 11 is photoelectrically converted by the CCD 58 and an analog imaging signal is output. This imaging signal is input to an auto gain control amplifier (hereinafter referred to as AGC) 60 and amplified. The amplification factor of the image signal in the AGC 60 is normally a predetermined standard amplification factor. For example, in the smooth kid mode, since the strobe device 61 is not used, when the subject has low brightness, the CPU 50 It is changed by the command signal.

  The image signal amplified by the AGC 60 is converted into digital image data by the A / D converter 62 and then sent to the digital signal processing circuit 63, where edge enhancement processing, median filter, coring processing, automatic white balance, etc. Is given. The image data is compressed by the compression processing circuit 64 and then displayed on the liquid crystal monitor 30 as a through image via the video encoder 65. When the shutter button 19 is pressed down, the image data is compressed. After being subjected to compression processing by the processing circuit 64, it is stored in the memory card 67 via the media controller 66.

  In addition to the digital signal processing circuit 63 and media controller 66, the I / O bus 52 is connected to an AE detection circuit 68, an AF detection circuit 69, a main memory 70, a flash memory 71, and an audio processing circuit 72. Yes. The AE detection circuit 68 integrates the luminance signal of the imaging signal and sends the luminance integration value as the obtained photometric data to the CPU 50.

  The AF detection circuit 69 decomposes the imaging signal into spatial frequency components, and sends the contrast data of the high frequency components to the CPU 50. The CPU 50 controls the lens driving mechanism 55 via the motor driver 57 to advance and retract the focusing lens in the optical axis direction and stop it at a position where the contrast of the high frequency component of the subject image is the highest.

  The main memory 70 is an SDRAM (Synchronous Dynamic Random Access Memory) that performs data transfer in synchronization with a bus clock signal having a fixed period, and is used as a frame memory for temporarily storing image data, as well as various operations. It is used as a work memory when performing etc. The flash memory 71 is a known nonvolatile memory, and stores various programs and data, various control parameters, and the like.

  The sound processing circuit 72 inputs a sound signal of a sound effect such as a pseudo sound of a shutter sound that simulates a driving sound of a mechanical shutter according to a command signal from the CPU 50 or a beep sound that notifies an operation error to the sound reproduction circuit 74. . The sound reproduction circuit 74 reproduces the sound effect with a speaker 75. The audio processing circuit 72 performs processing for converting audio input from the microphone 76 into audio data in the moving image shooting mode.

  Next, the operation of the above embodiment will be described. In order to use the digital camera 10, first, the power button 20 is pressed. Thereby, the photographing lens 11 protrudes from the retracted position, and the preparation for photographing is completed. When shooting a sleeping baby, the operation knob 18a is operated to rotate the mode switching dial 18 so that the pointing protrusion 18b points to the character “SP”.

  Since the “select scene” screen 37 is displayed on the liquid crystal monitor 30, the shooting mode 38 is selected from the tab 1 using the cross button 32. When the menu / execution button 35 is pressed after selecting the smooth kids mode 45 from the displayed sub-menu 38a, the characters “Kidds Zzz” representing the smooth kids mode 45 are displayed on the right side of the shooting mode 38 icon on the tab 1. The digital camera 10 is set in the smooth kids mode.

  As in the normal shooting mode, the CCD 58 is continuously driven in the smooth kids mode, and the image data output from the digital signal processing circuit 63 passes through the compression processing circuit 64 and passes through the video encoder 65 as a through image. It is displayed on the liquid crystal monitor 30. Using the liquid crystal monitor 30 as an electronic viewfinder, the display image on the liquid crystal monitor 30 is observed to perform framing.

  When the shutter button 19 is half-pressed, AE processing and AF processing start. The AE detection circuit 68 takes in the luminance signal of the image pickup signal, performs an integration operation, and sends the obtained photometric data to the CPU 50. The CPU 50 obtains the aperture value and shutter speed corresponding to the photometric data according to the program line (not shown) for the smooth kids mode, and sets the aperture 53 to the aperture value.

  Also, as shown in the flowchart of FIG. 6, when it is determined that the brightness of the subject is low illuminance based on the photometric data (st1), it is already set to the smooth kids mode (st2). The AF auxiliary light emission permission by the near-infrared LED 16 (st3), shutter sound prohibition (st4), strobe light emission prohibition (st5), and AGC 60 gain increase (st6) are set.

  The CPU 50 drives the near-infrared LED 16 via the LED control circuit 17 to irradiate the baby with near-infrared light, and at the same time, increases the gain of the AGC 60 and increases the amplification factor of the imaging signal output from the CCD 58. . As a result, even in a shooting environment with low illumination and low contrast, the AF detection circuit 69 can detect contrast data from the image pickup signal and send it to the CPU 50, and the focusing lens of the lens 52 is advanced and retracted in the optical axis direction, so that the subject image Is stopped at a position where the contrast of the high frequency component becomes the highest.

  When the sleeping baby is observed and the shutter button 19 is fully pressed at a desired timing, the image signal is read out from the CCD 58 at the next moment while the strobe light is not emitted and the charge accumulation time corresponding to the shutter speed is read. . The imaging signal output from the CCD 58 is input to the digital signal processing circuit 63 via the AGC 60 and the A / D converter 62.

  The image data output from the digital signal processing circuit 63 is compressed by the compression processing circuit 64 to reduce the data capacity, and then stored in the memory card 67 via the media controller 66. In this way, in the Suyasuya Kids Mode, the strobe device 61 is not used, and near-infrared light is used as AF auxiliary light, so it is easy to capture the baby's natural facial expression without waking up the sleeping baby. can do.

  In the shooting modes other than the smooth kids mode, the white LED 15 is selected and driven as a light source for AF auxiliary light (st7). With visible light emitted from the white LED 15, high-contrast AF data can be obtained, so that more accurate focus adjustment can be performed.

  In the embodiment described above, the white LED is provided as the AF auxiliary light for normal photographing and the near infrared LED is provided as the AF auxiliary light for sleeping baby photographing, and switching is performed according to the photographing situation. The invention is not limited to this, and only the near infrared LED may be provided, and the near infrared LED may be used not only in the smooth kids mode but also in normal shooting.

  In the above embodiment, in the smooth kid mode, strobe light emission is prohibited and AF auxiliary light emission is not prohibited. However, the present invention is not limited to this, and the AF auxiliary light is, for example, white light. In the case where the light is not near-infrared light, it is preferable to prohibit the flash auxiliary light and the AF auxiliary light. However, in this case, if the subject has low brightness and low contrast, it is difficult to focus automatically, and thus the AGC gain needs to be increased more.

  In the above-described embodiment, the digital camera emits a shutter sound in normal shooting. However, the present invention is not limited to this and may be a type that does not emit a shutter sound. . In the above embodiment, the AGC gain is increased in the smooth kid mode. However, when a sufficiently sensitive CCD is used, it is not necessary to increase the gain each time.

  In the above embodiment, the smooth kids mode is selected when shooting a sleeping baby, but may be selected when shooting a sleeping pet. Moreover, in the said embodiment, CCD was used as a solid-state image sensor, However This invention is not limited to this, For example, a CMOS image sensor may be sufficient. Moreover, although the said embodiment employ | adopted the digital camera as an imaging device, a mobile telephone with a camera and PDA with a camera may be sufficient.

It is a perspective view which shows the digital camera which is embodiment of this invention from the front side. It is a top view which shows the upper surface of a digital camera. It is a top view which shows the back surface of a digital camera. It is explanatory drawing which shows the display screen of a liquid crystal monitor. It is a block diagram which shows the electric constitution of a digital camera. It is a flowchart which shows the irradiation judgment process of AF auxiliary light.

Explanation of symbols

10 Digital Camera 12 Flash Unit 13 AF Auxiliary Light Projection Window 15 White LED
16 Near-infrared LED
17 LED control circuit 18 Mode switching dial 30 LCD monitor 45 Susukiya kids mode 50 CPU
58 CCD
61 Strobe device 72 Audio processing circuit

Claims (3)

  1. A strobe device that emits strobe light;
    An AF auxiliary light emitting device that emits AF auxiliary light for autofocus;
    An image pickup apparatus comprising: a control unit having a photographing mode in which the strobe light and the AF auxiliary light emitting device are controlled to prohibit the emission of the strobe light and the AF auxiliary light, respectively.
  2. A strobe device that emits strobe light;
    AF visible auxiliary light emitting device for emitting AF visible auxiliary light for autofocus mainly in the visible light wavelength region;
    An AF near-infrared auxiliary light emitting device that emits AF near-infrared auxiliary light for autofocus mainly in the near-infrared light wavelength region;
    An imaging apparatus comprising: a control unit having a photographing mode in which use of the AF visible auxiliary light emitting device is prohibited during strobe photographing using the strobe device and the AF near infrared auxiliary light emitting device is used.
  3. A sound effect generation device that at least generates a shutter sound in a pseudo manner is provided, and when the shooting mode is selected, the control unit controls the sound effect generation device to prohibit generation of a shutter sound. Item 3. The imaging device according to any one of Items 1 and 2.
JP2005161834A 2005-06-01 2005-06-01 Imaging apparatus Withdrawn JP2006339999A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
JP2005161834A JP2006339999A (en) 2005-06-01 2005-06-01 Imaging apparatus

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009260801A (en) * 2008-04-18 2009-11-05 Fujifilm Corp Imaging device
JP2011170057A (en) * 2010-02-18 2011-09-01 Panasonic Corp Imaging apparatus
JP2013058865A (en) * 2011-09-07 2013-03-28 Canon Inc Image pickup device, control method thereof, program and storage medium
JP2013197669A (en) * 2012-03-16 2013-09-30 Nikon Corp Image pickup device and image pickup device control program

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009260801A (en) * 2008-04-18 2009-11-05 Fujifilm Corp Imaging device
JP2011170057A (en) * 2010-02-18 2011-09-01 Panasonic Corp Imaging apparatus
JP2013058865A (en) * 2011-09-07 2013-03-28 Canon Inc Image pickup device, control method thereof, program and storage medium
JP2013197669A (en) * 2012-03-16 2013-09-30 Nikon Corp Image pickup device and image pickup device control program

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