CN101442616A - Imaging device and control method for imaging device - Google Patents
Imaging device and control method for imaging device Download PDFInfo
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- CN101442616A CN101442616A CNA2008101813367A CN200810181336A CN101442616A CN 101442616 A CN101442616 A CN 101442616A CN A2008101813367 A CNA2008101813367 A CN A2008101813367A CN 200810181336 A CN200810181336 A CN 200810181336A CN 101442616 A CN101442616 A CN 101442616A
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Abstract
The invention provides an imaging device and a control method for the imaging device. The imaging device of the present invention comprises an imaging section (291), including an image element (221) for imaging a subject, for generating image data based on output signals of the image element (221); a control section (297) for casing repeated operation of the imaging section in accordance with a single release operation; an adding processing section (294) for sequentially adding image data repeatedly output from the imaging section (291) and generating added mage data; an image display section (296) for displaying the added image data; and a setting section (298) for setting a repeat period for the imaging section (291) and instructing to the control section (297).
Description
Technical field
The present invention relates to the control method of camera head and camera head, relate in particular to the control method that in carrying out that manual shutter (or claiming B (Bulb) shutter) is taken and taking long second the time etc., can show the camera head and the camera head of subject image.
Background technology
In existing digital camera, carry out the observation of shot object image by the optical profile type view finder.Recently, started selling the digital camera of band live view Presentation Function on the market, this digital camera does not have the optical profile type view finder or shows by the obtained image of imaging apparatus by the display unit such as LCD monitor that are used to observe shot object image with the optical profile type view finder.
Because the digital camera of such band live view Presentation Function directly shows the subject image of being obtained by imaging apparatus, institute is so that observe.Before photography, not only show shot object image in addition, when manual shutter shooting etc., can also observe photographic images, can observe levels of exposure in real time thus according to exposure.For example, following camera head is disclosed in TOHKEMY 2005-117395 communique (on April 28th, 2005 open): in the shooting action, show on the LCD monitor with official hour at interval (for example 1/10 second) take out picture element signal from imaging apparatus and with its image after addition successively.
In manual shutter shooting etc., the time (time for exposure) that opens into shutter close from shutter is various according to reference object and ambient conditions.For example, the time for exposure when taking as pyrotechnics so bright dynamic subject is about the several seconds to tens of seconds, so the progress situation that can't suitably observe exposure during length when the time interval of display update.On the other hand, time for exposure when taking the static subject of as night scene dark is several minutes to tens of minutes, so the display update in short time interval is insignificant, in addition, also has from imaging apparatus and read picture element signal and the such problem of electric power that consumed is in vain handled in addition.
Summary of the invention
The present invention makes in view of the above problems, the purpose of this invention is to provide in the camera head with the function that can show the subject image in carrying out that manual shutter is taken and taking long second the time etc., can carry out the control method of the camera head and the camera head of display update by effective timing.
Camera head of the present invention has: image pickup part, and it comprises the imaging apparatus that shot object image is made a video recording, and generates view data according to the output signal of this imaging apparatus; Control part, it makes above-mentioned image pickup part repetitive operation in response to a shutter release operation; The addition handling part, the view data addition successively that it will repeat to export from above-mentioned image pickup part, and generate the addition view data; Image displaying part, it shows above-mentioned addition view data; And the configuration part, it sets the repetition period of above-mentioned image pickup part, and above-mentioned control part is indicated.
In addition, the control method of camera head of the present invention, in the single exposure action, make image pickup part repetitive operation, whenever from above-mentioned image pickup part output image data the time, this view data phase adduction successively is shown to display part, wherein, according to manual operation or shooting condition, change the repetition period of above-mentioned image pickup part.
Description of drawings
Fig. 1 is the stereoscopic figure that observes the digital single-lens reflex camera of an embodiment of the present invention from the back side.
Fig. 2 is the integrally-built block diagram of electrical system that the digital single-lens reflex camera of an embodiment of the present invention is shown.
Fig. 3 extracts with the shooting of manual shutter mode etc. in the digital single-lens reflex camera of the present invention's the 1st execution mode and shows the block diagram shown in the relevant structure.
Fig. 4 is the flow chart that the power connection homing action of the present invention's the 1st execution mode is shown.
Fig. 5 be illustrate the present invention's the 1st execution mode update time input action flow chart.
Fig. 6 is the flow chart that the shooting action of the present invention's the 1st execution mode is shown.
Fig. 7 is the flow chart that the exposure actions of the present invention's the 1st execution mode is shown.
Fig. 8 is the figure in each zone of imaging apparatus that the digital single-lens reflex camera of the present invention's the 1st execution mode is shown.
Fig. 9 is illustrated in the figure that the relation of temperature and integral level is shown about dark current in the imaging apparatus of digital single-lens reflex camera of the present invention's the 1st execution mode.
Figure 10 illustrates the figure that the photographing information of the digital single-lens reflex camera of the present invention's the 1st execution mode shows.
Figure 11 is the figure of update displayed that the digital single-lens reflex camera of the present invention's the 1st execution mode is shown, and the demonstration of different update times (a)～(e) is shown respectively.
Figure 12 is the figure of manual shutter mode that the present invention's the 1st execution mode the is shown demonstration when taking, and the process of following update time (a)～(g) is shown and the demonstration that changes.
Figure 13 is the flow chart that the power connection homing action of the present invention's the 2nd execution mode is shown.
Figure 14 is the flow chart that the exposure actions of the present invention's the 2nd execution mode is shown.
Figure 15 is the flow chart that resets update time that the present invention's the 2nd execution mode is shown.
Embodiment
Below, with reference to the accompanying drawings, adopted application digital single-lens reflex camera of the present invention that preferred the 1st execution mode is described.Fig. 1 is the stereoscopic figure that observes the digital single-lens reflex camera of embodiment of the present invention from the back side.
This digital single-lens reflex camera is made of camera body 200 and replacing camera lens 100.Upper surface at camera body 200 disposes shutter release button 21, screening-mode knob 22, information setting knob 24 and photoflash lamp 50 etc.Shutter release button 21 has the 1st release-push and complete the 2nd release-push of partly on time connecting as the cameraman of on time connecting.
By connecting the 1st release-push (hereinafter referred to as 1R), camera carries out the focusing of focus detection, phtographic lens and the photometry of subject brightness etc. and takes warming-up exercise, by connecting the 2nd release-push (hereinafter referred to as 2R), carry out the shooting action that is taken into the view data of shot object image according to the output of imaging apparatus 221 (with reference to Fig. 2).
Screening-mode knob 22 is to constitute rotatable functional unit, consistent by the drawing demonstration or the mark that make the expression screening-mode that is arranged on the screening-mode knob 22 with sign, can option program screening-mode (P), aperture priority screening-mode (A), Shutter speed priority screening-mode (S), manually screening-mode (M), manual shutter mode various screening-modes such as (B).
Photoflash lamp 50 is Pop-up auxiliary lighting apparatuses, can photoflash lamp 50 be ejected and subject is shone by operating not shown action button.
The back side at camera body 200 disposes: back side LCD monitor 26, continuous shooting/list clap button 27, AE locking press button 28, upwards with cross button 30U, downwards with cross button 30D, to the right with cross button 30R, use cross button 30L (when being referred to as these cross buttons 30U, 30D, 30R, 30L, being called cross button 30), OK button 31, live view the Show Button 33, large buttons 34, menu button 37 and reproduction button 38 left.
Back side LCD monitor 26 is to be used to carry out live view to show, reproduce the display unit that shows shot object image, demonstration photographing information and the menu taken.And, when taking when manual shutter is taken or long second the time etc. in, come display image according to the picture signal that in exposure actions, obtains by imaging apparatus 221.Display unit is not limited to LCD monitor, shows as long as can carry out these.
It is that burst mode and single bat pattern are carried out the functional unit that mode switch is used that continuous shooting/list is clapped button 27, this burst mode shutter release button 21 entirely by during take continuously, this list bat pattern is taken one entirely at shutter release button 21 on time.AE locking press button 28 is the functional units that are used for fixing light value.After the brightness of having measured reference object,,, can under the constant state of levels of exposure, take like this even the change composition also keeps light value when operation during this AE locking press button 28.
Live view the Show Button 33 is to be used for switching to that live view shows or showing the action button of the display frame that switches to information demonstration etc. from live view from the display frame of information demonstration etc.In addition, live view shows it is the pattern that shows shot object image in order to observe according to the output of the recording imaging apparatus 221 of shot object image overleaf on the LCD monitor 26, and information shows it is the pattern that shows the photographing information of digital single-lens reflex camera in order to carry out display setting overleaf on the LCD monitor 26.
Reproduce button 38 and be and be used for the action button that shows the subject image that is write down on the LCD monitor 26 overleaf indicating after the photography.Synchronous Dynamic Random Access Memory) 267, the view data of subject in the recording medium 277 shows after decompressing to utilizing compact models such as JPEG to be stored in SDRAM described later (Synchronous Dynamic Random Access Memory:.
In the switching of the side of camera body 200 recording media storage lid 40 is installed freely.When opening this recording media storage and cover 40, side is provided with the filling slot that is used to load recording medium 277 within it, and recording medium 277 can load and unload and be filled into freely in the camera body 200.
Then, use Fig. 2 illustrates the overall structure based on the electrical system of digital single-lens reflex camera.In the present embodiment, replacing camera lens 100 and camera body 200 constitute in the mode of split, and are electrically connected by communication contact 300, but, also can constitute integratedly and change camera lens 100 and camera body 200.In addition, in Fig. 2, omit the circuit module of built-in strobe 50.
In the internal configurations of changing camera lens 100 photographic optical system 101 that focal adjustments and focus adjustment use and the aperture 103 that is used to regulate the opening amount are arranged.Photographic optical system 101 is driven by aperture driving mechanism 109 by lens driving mechanism 107 drivings, aperture 103.
And, camera lens CPU111 to camera body 200 send change camera lenses 100 open camera lens intrinsic information such as f-number and focus information and by detected focal length of optical system position detecting mechanism (not shown) and focal position information.
Be provided with moving reflector 201 in the camera body 200, it can rotate between tilt with respect to camera lens optical axis for shot object image is reflexed to the viewing optical system positions (down position, shot object image observation place) of 45 degree and the position of upspringing for shot object image is directed to imaging apparatus 221 (lifting position, remove the position).
Above this moving reflector 201, dispose the focusing screen 205 that is used to make the shot object image imaging, above this focusing screen 205, dispose and be used to make the pentaprism 207 that overturns about shot object image.
Emitting side (right side among Fig. 2) at this pentaprism 207 disposes the eyepiece (not shown) that shot object image is observed usefulness, disposes photometry sensor 211 not hindering on the position of observing shot object image of its next door.This photometry sensor 211 is connected with photometry treatment circuit 241, by this photometry treatment circuit 241, processing such as processing and amplifying and analog-digital conversion is carried out in the output of photometry sensor 211.
Be made of semi-transparent semi-reflecting lens near the central authorities of above-mentioned moving reflector 201, be provided with secondary speculum 203 at the back side of this moving reflector 201, the object light that this pair speculum 203 is used for seeing through in semi-transparent semi-reflecting lens portion reflexes to the bottom of camera body 200.
This pair speculum 203 can rotate with respect to moving reflector 201, when moving reflector 201 is upspring (dotted line position among Fig. 2), secondary speculum 203 turns to the position that covers semi-transparent semi-reflecting lens portion, when moving reflector 201 is positioned at shot object image observation place (down position), as shown in the figure, secondary speculum 203 is positioned at the position of opening with respect to moving reflector 201.
This moving reflector 201 is driven by moving reflector driving mechanism 239.And, below secondary speculum 203, dispose focus detection sensor 243, the output of this focus detection sensor 243 is connected with focus detection treatment circuit 245.Focus detection sensor 243 is made of known phase difference AF optical system and pair of sensors, this phase difference AF optical system is in order to measure the defocus amount by the shot object image of photographic optical system 101 imagings, and the peripheral light beam of photographic optical system 101 is separated into two light beams.
Dispose the focal plane formula shutter 213 of time for exposure control usefulness at the rear of moving reflector 201, this shutter 213 carries out drive controlling by fast door drive mechanism 237.Disposing imaging apparatus 221 at the rear of shutter 213, will be the signal of telecommunication by the shot object image opto-electronic conversion of photographic optical system 101 imagings.Charge coupled device) or CMOS (Complementary Metal OxideSemiconductor: two-dimensional solid-state imaging apparatus such as complementary metal oxide semiconductors (CMOS)) in addition, can use CCD (Charge CoupledDevice: as imaging apparatus 221 is self-evident.
Dispose infrared cutoff filter/low pass filter 217 between above-mentioned shutter 213 and imaging apparatus 221, this infrared cutoff filter/low pass filter 217 is the optical filters that are used for from object light intrafascicular removal infrared light composition and radio-frequency component.In addition, near imaging apparatus 221, dispose temperature measuring circuit 231.This temperature measuring circuit 231 utilizes the temperature dependency etc. of the forward current of diode, measures near the ambient temperature the imaging apparatus 221, and output and the corresponding temperature signal of this ambient temperature.
The output of ADC 225 is removed circuit 227 with dark current and is connected.It is the circuit that are used to remove the dark current that is produced by imaging apparatus 221 that dark current is removed circuit 227, uses the dark current that lightproof area produced at the periphery of imaging apparatus 221, proofreaies and correct the view data of expression shot object image.
Dark current is removed circuit 227 and ASIC, and (Application Specific Integrated Circuit: application-specific integrated circuit (ASIC)) 250 interior data/address buss 252 are connected.On this data/address bus 252, be connected with: sequential controller (hereinafter referred to as " host CPU ") 251, image processing circuit 257, compressed and decompressed circuit 259, video signal output circuit 261, SDRAM control circuit 265, imput output circuit 271, telecommunication circuit 273, recording medium control circuit 275, flash memory control circuit 279 and switch testing circuit 283.
Be connected the action of host CPU 251 these digital single-lens reflex cameras of control on the data/address bus 252.Be connected numeral that image processing circuit 257 on the data/address bus 252 carries out DID and amplify (digital gain adjustment processings), color correction, gamma (γ) correction, contrast correction, live view demonstration with various image processing such as image generations.
And compressed and decompressed circuit 259 is to be used for the circuit that the view data that is stored in SDRAM 267 compressed and compressing image data is decompressed in compression modes such as JPEG or TIFF.In addition, image compression is not limited to JPEG or TIFF, also can use other compress modes.
Video signal output circuit 261 is connected with back side LCD monitor 26 via LCD monitor drive circuit 263.Video signal output circuit 261 is that the view data that is used for being stored in SDRAM 267 and recording medium 277 converts the circuit that is used for carrying out on the LCD monitor 26 overleaf video signal displayed to.As shown in Figure 1, back side LCD monitor 26 is configured in the back side of camera body 200, but is not limited to the back side, so long as the position that the cameraman can observe gets final product, and, be not limited to LCD monitor, also can be other display unit.
SDRAM 267 is connected with data/address bus 252 via SDRAM control circuit 265, this SDRAM 267 be used for interim storage carry out the view data after the image processing by image processing circuit 257 or compress by compressed and decompressed circuit 259 after the buffer storage of view data.
The imput output circuit 271 that is connected with above-mentioned imaging apparatus drive circuit 223, temperature measuring circuit 231, fast door drive mechanism 237, moving reflector driving mechanism 239, photometry treatment circuit 241 and focus detection treatment circuit 245 control via data/address bus 252 and each circuit such as host CPU 251 between the input and output of data.
Be connected with data/address bus 252 via the telecommunication circuit 273 that is connected with camera lens CPU111 of communication contact 300, and carry out and the exchanges data of host CPU 251 etc. and communicating by letter of control command.The recording medium control circuit 275 that is connected on the data/address bus 252 is connected with recording medium 277, and control reading to the record of the view data of this recording medium 277 etc. and view data etc.
Recording medium 277 constitutes can load in the erasable recording medium such as xD image card (xD picture card) (registered trade mark), compact flash (Compact Flash) (registered trade mark), SD storage card (SD memorycard) (registered trade mark) or memory stick (Memory Stick) (registered trade mark) any one, and with respect to camera body 200 loading and unloading freely.In addition, also can constitute the structure that can connect hard disk via the communication contact.
Flash memory control circuit 279 is connected with flash memory (Flash Memory) 281, and this flash memory 281 stores the program of the action that is used for the control figure single-lens reflex camera, and host CPU 251 carries out the control of digital single-lens reflex camera according to the program that is stored in this flash memory 281.In addition, flash memory 281 is erasable nonvolatile memories of writing.
Comprise the 1R switch of the 1st stroke that detects shutter release button 21 (half by), the 2R switch that detects the 2nd stroke (complete by), mains switch, with the menu switch of menu button 37 interlocks, with the rotary switch of screening-mode knob 22 interlocks, be connected with data/address bus 252 via switch testing circuit 283 at interior various switches 285 with the rotary switch of information setting knob 24 interlocks and with the various switches of other functional unit interlocks.
Then, use Fig. 3 to illustrate that the image with in the exposure in the manual shutter shooting etc. shows relevant structure.Control part 297 is made of the host CPU 251 that digital single-lens reflex camera integral body is controlled.Configuration part 298 is waited the update time of the demonstration of manually setting the progress situation (levels of exposure) that is used for confirming exposing when manual shutter is taken etc. by information setting knob 24 under the situation, perhaps wait automatic setting to be used for affirmation according to photographic information and expose update time of demonstration of progress situation (levels of exposure).
Addition image recording portion 295 is made of the recording medium as above-mentioned recording medium 277, and reads and be stored in the final addition view data of carrying out the sum operation portion 294 after the sum operation according to the control command of control part 297 from interim storage part 293.
Owing to constitute such structure, so at first the cameraman sets update time by the operation of configuration part 298.Control part 297 is controlled to be, every the update time of setting, will be by sum operation portion 294 by the obtained view data addition successively of image pickup part 291, and this addition image is shown in the image displaying part 296.
This addition image is as shown in figure 12 for to build up addition with view data, so be the dark image shown in 12 (a) at first, but be gradually varied to bright image, when repeating several times with the image cumulative addition, shown in Figure 12 (g), be the excessive slightly image of exposure.
Below, use Fig. 4～flow chart shown in Figure 7 to explain the action of the digital single-lens reflex camera of the present invention's the 1st execution mode.
Fig. 4 is the action that the power connection based on host CPU 251 of camera body 200 sides resets.When loading battery in camera body 200, this flow process starting judges at first whether the mains switch of camera body 200 connects (#1).
In result of determination is that the state that becomes low power consumption is sleep state (#3) under the situation of mains switch disconnection.Under this sleep state, only under the situation that mains switch is connected, carry out Interrupt Process, below step # 5, be used to the processing that mains switch is connected.Before mains switch is connected, stop the action in addition of mains switch Interrupt Process, to prevent the consumption of power-supply battery.Mains switch is under the situation of connection in step # 1, has perhaps broken away under the dormant situation among the step # 3 beginning supply power (#5).
Then, if having the screening-mode that sets by screening-mode knob 22,, then read in these shooting conditions and shot information (#7) by the information such as ISO photosensitivity, the shutter speed of manually setting and f-number that information setting knob 24 sets.
Reading in of shot information among the step #7 is to read in camera lens intrinsic informations such as the open f-number of changing camera lens 100, focus information via telecommunication circuit 273 from camera lens CPU111.In this step, under the situation as shutter speed when having set manual shutter mode or set long second, read in these information.
Then, judge whether set manual shutter mode (#9).Because in step #7, read in screening-mode, so judge whether set manual shutter mode as the screening-mode that is read in.
For not set under the situation of manual shutter mode, carry out photometry/exposure computing (#11) in the result of determination of step #9.In this step,, use this exposure to come exposure control values such as computing shutter speed and f-number according to screening-mode/shooting condition by photometry sensor 211 pairs of subject brightness carrying out photometry union exposure.
Result of determination at step #9 is to have set under the situation of manual shutter mode, and input update time (repeating the cycle of output image data) (#31).Use Fig. 5 to narrate the input of this update time in the back.When the end of input of update time, enter step #13.Under the situation of manual shutter mode, irrelevant with photometry, operate on-off shutter 213 by the user, so the not photometry of execution in step #11/exposure computing.
Then, show photographing information (#13) on the LCD monitor 26 overleaf.Photographing information is the shutter speed that calculates among the screening-mode/shooting condition that reads among the step #7 etc. and the step #11 and exposure control value of f-number etc.As screening-mode, under the situation of having set manual shutter mode, as shown in figure 10, show manual shutter mode demonstration 301 and show 302 update time on the LCD monitor 26 overleaf with other photographing information.
After showing photographing information, then, judge with the reproduction switch that reproduces button 38 interlocks whether connect (#17).Reproduction mode is following pattern: promptly, when reproducing button 38 and carried out operation, the view data of playback record in recording medium 277, and it is presented on the back side LCD monitor 26.Under the situation of result of determination, carry out reproducing movement (#33) for the reproduction switch connection.
Under the situation of result of determination of step # 17, judge with the menu switch of menu button 37 interlocks whether connect (#19) for reproduction switch access failure.In this step, judge and whether operated menu button 37 and set menu mode.In result of determination is under the situation of menu switch connection, carries out menu overleaf on the LCD monitor 26 and shows, and carry out menu and set action (#35).Set action by menu, can carry out the various settings actions such as setting of AF pattern, white balance, the setting of ISO photosensitivity, drive pattern.
Result of determination at step # 19 is under the situation of menu switch access failure, judges whether partly supress shutter release button 21, is whether the 1R switch connects (#21).In result of determination is under the situation of 1R switch connection, carries out the subprogram (#37) of taking the shooting action of preparing and photographing.Use Fig. 6 to be described in detail this subprogram in the back.
Result of determination at step # 21 is that #1 is same with step under the situation of 1R switch access failure, judges whether mains switch connects (#23).In result of determination is under the situation of mains switch connection, returns step #7, repeats above-mentioned action.On the other hand, under the situation of mains switch access failure, stop supply power (#25), return step # 3, become above-mentioned sleep state.
Then, use Fig. 5 to come the input action of the update time of description of step #31.After entering this subprogram, at first, detect by near the ambient temperature (#41) the imaging apparatus 221 of temperature measuring circuit 231 mensuration.When obtaining ambient temperature, decide higher limit update time (#43) according to this ambient temperature.
As Fig. 8 schematically illustrates, in imaging apparatus 221, be arranged with photodiode (pixel) along two-dimensional directional.Grid representation pixel one by one in Fig. 8.More than half partial pixel of imaging apparatus 221 is an effective pixel area 311, and its right side is a level shadow pixel region 312, and its downside is vertical shading pixel region 313.Picture element signal according to the pixel output that is subordinated to effective pixel area 311 generates view data, according to the picture element signal generation dark current data of the pixel output that is subordinated to level shadow pixel region 312 and vertical shading pixel region 313.
This dark current has temperature dependency as shown in Figure 9, and when near the temperature the imaging apparatus 221 was high more, it is big that this dark current (integrated value) also becomes in time rapidly.The subject image from imaging apparatus 221 output having been carried out overlapping the picture element signal after the opto-electronic conversion dark current arranged, when the time for exposure, (time of integration) was elongated, can not ignore dark current.Therefore, suppose the dark current that in effective pixel area 311, has taken place from level shadow pixel region 312 and vertical shading pixel region 313 outputs, then remove in the circuit 227, carry out the correction of dark current by deducting the dark current data from view data based on picture element signal at dark current.
The dark current grade that more early reaches capacity when temperature is high more.When reaching capacity grade, dark current then can't correctly remove dark current.Therefore in the present embodiment, when manual shutter mode etc. carries out exposure actions for a long time, before dark current reaches capacity grade, read picture element signal from imaging apparatus 221.That is, consider dark current characteristic, limit the higher limit of update time according to the ambient temperature of measuring by temperature measuring circuit 231, so that dark current unsaturated (#43).Specifically, storage environment temperature and the table of upper limit time are shown to determine with reference to this in advance.
Then, in order to import update time, and whether operated the judgement (#45) of information setting knob 24.In result of determination is under the situation of not operation information setting knob 24, returns original program.On the other hand, under the situation of having operated information setting knob 24, switch testing circuit 283 detects its direction of rotation (#47).
Then, judge whether detected direction of rotation is the direction (#49) that reduces update time.In result of determination is to be under the situation of the direction of rotation that reduces update time, whether has reached lower limit (#51) update time of judging last time.Lower limit for example can be made as about 0.1 second as long as suitably set.For not reach under the situation of lower limit, shorten update time in order (#53) from current set condition in result of determination with the step of stipulating.
As shown in figure 10, be shown as update displayed 302 in the photographing information on the LCD monitor 26 overleaf update time.Whenever by information setting knob 24 when the direction that shortens update time has been carried out rotary manipulation, for example,, the direction step in accordance with regulations of its lower limit in Figure 11 (c) to (a) is reduced gradually if current set condition is initial value 30 seconds.This step can suitably determine according to behaviour in service.When shorten end update time, return original program.
For not being to reduce under the situation of direction, whether reached the higher limit (#55) that in step #43, determines in the result of determination of step # 49 the update time of judging last time.For not reach under the situation of higher limit, step in accordance with regulations prolongs update time (#57) in result of determination.Whenever by information setting knob 24 when the direction that prolongs update time has been carried out rotary manipulation, increase gradually from the direction step in accordance with regulations of the higher limit of current state to Figure 11 (e).Only be an example at interval the update time of Figure 11 (a)～(e), can suitably change.
Then, use Fig. 6 to come the shooting among the description of step # 37 to move.When the 1R switch connection, start this subprogram, at first, close the photographing information that is presented on the back side LCD monitor 26
(#61)。Then, the subprogram (#63) of excute phase difference AF control.In this subprogram, defocus direction and defocus amount by what known phase difference AF detected photographic optical system 101, and defocus the drive controlling that direction and defocus amount are carried out optical system driving mechanism 107 according to this, carry out the focusing of photographic optical system 101.
When phase difference AF finished, #9 was same with step, judged and whether had set manual shutter mode (#65).For not set under the situation of manual shutter mode, carry out photometry/exposure computing in result of determination, obtain exposure control values (#67) such as shutter speed and f-number.
On the other hand, be to have set under the situation of manual shutter mode in the result of determination of step # 65, skips steps #67 enters step #69.This is because under the situation of manual shutter mode, and as mentioned above, the switching time of shutter 213 does not need photometry and exposure computing by cameraman's decision.
Then, judge whether supress shutter release button 21 entirely, be whether the 2R switch connects (#69).In result of determination is under the situation of 2R switch access failure, judges whether the 1R switch connects (#87).In result of determination is under the situation of 1R switch access failure, finishes to take action, returns original program.On the other hand, be under the situation of 1R switch connection in result of determination, return step # 69, become the holding state of the state that alternately detects 1R switch and 2R switch.
When the result of determination of step # 69 is the 2R switch connection, transfer to the step that is used to take.That at first, carries out moving reflector 201 keeps out of the way action (moving to lifting position) (#71).Thus, will be directed to the direction of imaging apparatus 221 based on the subject light beam of photographic optical system 101.Then, camera lens CPU111 indication aperture is dwindled action, the aperture of carrying out aperture 103 dwindles action (#73).
Thus, finished the preparation that enters common shooting action or manual shutter shooting action, so beginning exposure actions (#75).In exposure, make the preceding curtain of shutter 213 begin to move, and the electric charge savings of beginning imaging apparatus 221.When having passed through the shutter speed time corresponding of manually setting with the shutter speed of in step #67, obtaining or by the cameraman or by cameraman's indication, finishing control shutter in a helpless situation and take, moving of the back curtain of beginning shutter 213, and the electric charge savings of end imaging apparatus 221.
When this exposure actions, under the situation of having set manual shutter mode, press full shutter release button 21 during shutter 213 be open state, during this period, by imaging apparatus 221 by repeating to obtain view data update time at interval, upgrade image overleaf on the LCD monitor 26, show simultaneously based on this view data.Use Fig. 7 to be described in detail this exposure actions in the back.
When exposure actions finishes, to the open indication of camera lens CPU111 output aperture 103, open aperture 103 (#77).Then, make moving reflector 201 carry out homing action (#79), and carry out reading and be stored in temporarily the common data the SDRAM267 or the image processing (#81) of addition view data from imaging apparatus 221 to down position.With the Imagery Data Recording after the image processing (#83) in recording medium 277, and stop at the image demonstration (#85) that shows in the back side LCD monitor 26.When stopping the image demonstration, return original program.
Then, use Fig. 7 comes the exposure actions among the description of step #75.After entering this subprogram, at first, #9 is same with step, judges and whether has set manual shutter mode (#101).In result of determination for not set under the situation of manual shutter mode, common screening-modes such as executive program screening-mode.
As common screening-mode, at first, the timer (#103) that starting time for exposure timing is used makes imaging apparatus 221 begin shooting (#105) when aperture 213 is opened.That is, the shot object image of imaging on imaging apparatus 221 is carried out opto-electronic conversion, and begin to put aside signal charge.
After the shooting beginning, follow and judge whether passed through the time for exposure corresponding (when setting second) (#107) with the shutter speed that in step #67, calculates or manually set.When result of determination when having passed through the time for exposure, close shutter 213, and stop the shooting (#109) of imaging apparatus 221.
Then, from imaging apparatus 221, read picture signal (#111), this picture signal of reading is stored in (#113) among the SDRAM 267 temporarily.Picture signal according to this interim storage shows photographic images (#115) overleaf on the LCD monitor 26.
Result of determination at step # 101 is to have set under the situation of manual shutter mode, at first, the data (#120) of the addition image memory region (not shown) that removing is prepared in interim storage part 293, the timer (#121) that update time, timing was used that starting shows, #105 is same with step, opens shutter 103 and begins shooting (#123).Then, judge whether the timer that update time, timing was used has passed through the update time (#125) that sets in step #120.
In result of determination for not pass through under the situation of update time, judge whether removed shutter release button 21 entirely by, be whether the 2R switch disconnects (#151).In 2R switch connection and update time as yet not under the situation of process, become the alternately holding state of determination step # 125 and step # 151.
When the result of determination of step # 125 when having passed through update time, keeping stopping the shooting of imaging apparatus 221 under shutter 213 opened state, and reading picture signal (#127, #129).View data after the digitlization of this picture signal of reading is stored in temporarily the latest image storage area (#131) in the storage area of interim storage part 293.This storage is the interim view data of reading of preserving for the sum operation of carrying out afterwards.
Then, reset the timer that update time, timing was used (#133), make imaging apparatus 221 begin shooting (#135).Then, be stored in the addition view data in the past in the addition image memory region of interim storage part 293 by 294 pairs in sum operation portion and above-mentioned latest image data are carried out sum operation.This sum operation result stores in the addition image memory region of interim storage part 293 (#137) once more, and the addition image of this storage is shown to (#139) in the back side LCD monitor 26.When having shown the addition image, return step # 125 and carry out above-mentioned step.
Thereby when the cameraman who sees the image that has shown be judged as grade that levels of exposure reached hope remove shutter release button 21 entirely on time, promptly when disconnecting the 2R switch, by the judgement among the step # 151, enter step #153 from step # 151, be transferred to the processing that is used to finish exposure actions.
That is, same with step # 109, #111, #113, stop shooting when closing shutter 213, and carry out the interim storage (#153, #155, #157) of the reading of view data, view data.And #137～#139 is same with step, obtains the addition image by sum operation, shows after having stored this addition image (#159, #160, #161).When having shown the addition image, return original program.
Like this, when having passed through the update time of in step # 31, setting (#125 → Y), stop the shooting in the imaging apparatus 221, read picture signal, carry out sum operation with the addition view data in the past of in the temporary storage area, storing, and as shown in figure 12, be shown in the back side LCD monitor 26.In the moment of having passed through update time at first, the time for exposure is short, so be whole dark image, still, whenever through update time the time, all view data is carried out addition, so become bright image gradually.The cameraman can judge whether the lightness wished for the cameraman by observing back side LCD monitor 26.
In the present embodiment, when having set manual shutter mode, in exposure actions, move by repeating shooting update time at interval, whenever carried out when action shooting just with image data storage in storage part 293 temporarily, and with addition the addition image of view data of this storage be shown in the back side LCD monitor 26.Can manually set this update time by configuration part 298, and can suitably change.Therefore, can carry out display update by effective timing according to reference object or cameraman's intention.
In addition, in the present embodiment, at limit setting value update time, to be no more than higher limit and lower limit.Therefore, can prevent to surpass the use of the performance of imaging apparatus 221.In addition, in the present embodiment, change the upper limit of update time according to dark current characteristic.Therefore, the correction with the corresponding view data of dark current can be carried out, the little image of noise can be made.
Then, adopt Figure 13 to Figure 15 that the 2nd execution mode of the present invention is described.In the 1st execution mode to having carried out manual setting update time, but in the 2nd execution mode according to subject brightness automatically change.In addition, in the time of long second, also show under the situation of photography by repeating shooting and image update time at interval.
The structure of the 2nd execution mode and Fig. 1 are identical to the structure of the 1st execution mode shown in Figure 3, only Fig. 4 are changed to the flow chart of Figure 13 to Figure 15 to flow chart shown in Figure 7, so be that the center describes with its difference.In addition, the configuration part among Fig. 3 298 is not to use the manual setting of information setting knob 24 but carries out automatic setting by host CPU 251 grades in the 2nd execution mode.
Figure 13 illustrates the power connection homing action of the host CPU 251 of camera body 200 sides.This flow chart is the flow process identical with Fig. 4 the subprogram of importing except the update time of omitting step # 31 in the flow chart that power connection shown in Figure 4 resets, so mark same-sign in same step, omits detailed explanation.
In the 1st execution mode, carried out the subprogram of input update time of step # 31 in order manually to set update time, but in the 2nd execution mode update time carry out automatic setting according to subject brightness etc., so omit this step #31.In addition, the flow chart of the Fig. 6 in the subprogram of the shooting of step # 37 action and the 1st execution mode is identical.
Then, adopt Figure 14 that the exposure actions of the step # 75 in the subprogram of the photography action of step # 37 is described.When entering the subprogram of this exposure actions, whether at first, carrying out screening-mode is the judgement (#101) of manual shutter mode.In result of determination when being not manual shutter mode, the judgement (#102) of taking when whether being long second.The shutter speed of reading in step #7 is judged to be when being long second when for example surpassing 30 seconds and takes.
When taking when not being long second, result of determination takes usually.Because it is same to step #115 with the step # 103 of Fig. 7 to take action usually, so, omit detailed explanation to the identical symbol of same step mark.
Result of determination in step # 101 is set for example 0.5 second initial value as update time (#118) when having set manual shutter mode.Result of determination in step # 102 when long second during photography, is set update time (#117) according to the shutter speed of setting for having set.The shutter speed that for example will set as the setting of update time here 1/100th as update time.
In step # 117 or step #118, when having carried out the setting of update time, then eliminate the addition image memory region (#120) of interim storage part 293, make the timer starting (#121) that update time, timing was used, make imaging apparatus 221 begin shooting (#123).
Then, judge whether timing update time has been passed through the update time (#125) that sets with the timing of timer.In result of determination for not pass through under the situation of update time as yet, judge and whether to have indicated manual shutter to take to finish (that is, and in manual shutter mode, whether removed shutter release button 21 entirely by operation, whether the 2R switch disconnects) (#151).
Result of determination at step # 151 is that the 2R switch still is under the situation about connecting, and judges when whether having passed through the second that has set under the shooting in the time of long second (#152).For as yet under the situation through when second of setting, return step # 125 in result of determination.Like this, all as yet not through update time and set long second the time, the 2R switch keeps becoming the holding state of repetition determination step # 125, #151, #152 under the situation of the state connected.
When the result of determination of step # 125 when passing through update time, same to step #139 with the step #127 from Fig. 7, shutter 213 stays open, and the shooting of imaging apparatus 221 is stopped (#127), and carries out reading of picture element signal.
Then, will be stored in based on the view data of the picture element signal of reading in the interim storage part 293 (#131) temporarily, and make timer that update time, timing was used reset back (#133) and begin shooting (#135).Then, the addition (#137) of view data of temporarily storing and addition view data is in the past stored this addition image into that back (#138) shows (#139) in the addition image memory region of interim storage part 293 once more.
Like this, in step # 125, whenever being judged to be when having passed through update time, same with the situation of the 1st execution mode, from imaging apparatus 221, read picture element signal, and will store into successively in the storage area of interim storage part 293 based on the view data of this picture element signal, generate and show whole addition images.
When having carried out the demonstration of addition image, then same with step # 102, the judgement (#141) of taking when whether being long second.In result of determination is to return step # 125 under the situation of taking when being long second, and carries out above-mentioned action.On the other hand, not being under the situation of taking when growing second, having set under the situation of manual shutter mode, carry out reset (#143) of update time.
Be set initial value the update time when having set manual shutter mode in step #118, but in step #143, carry out the automatic adjustment of update time, so that under the bright situation of subject brightness, shorten update time, under dark situation, prolong update time for this update time.Adopt Figure 15 that the subprogram that resets this update time is narrated in the back.When having carried out the resetting of update time, return step # 125.
Result of determination in step # 151 is that the indication or the result of determination among the step # 152 that have manual shutter to take to finish are set second constantly for having passed through, and is used to finish the processing of exposure actions to the step # 161 at step #153.These steps are identical with Fig. 7, so to identical step mark prosign, omit detailed explanation.
Then, adopt Figure 15 that the subprogram that resets update time of step #143 is described.When the subprogram that enters this update time and reset, carry out the judgement (#181) of brightness degree.The mean flow rate of the view data that employing is read in step #129 is as brightness degree.Generally speaking, if the lightness of each pixel of view data has 8 resolution, then the brightness degree of each pixel is any one in 0～255.So-called mean flow rate is this brightness degree value average of each pixel.In addition, except mean flow rate, can also suitably adopt other photometry computing such as central emphasis brightness.
Then, adopt the brightness degree of obtaining to become the correct exposure prediction (#183) of time for exposure before.Here, to be assumed to brightness degree average of each pixel for example be about 140 situation in correct exposure.Therefore, if known the time of current mean flow rate grade and this mean flow rate grade of arrival, then measurable time before becoming correct exposure.When obtaining predicted time, then carry out the computing (#185) of update time.
For example carry out equally predicted time divided by 100 computing as this computing with step #117.Change update time (#187) according to the time of obtaining at this, and return original program.When returning the flow process of exposure actions shown in Figure 14, in step # 125, use judge the update time reset, and make a video recording and show by this time interval.
Like this, in the 2nd execution mode of the present invention, when manual shutter mode, automatically reset update time according to subject brightness.Therefore, can carry out display update by effective timing according to subject brightness.Automatically set update time when in the time of long second, taking in addition, during according to second of setting.Therefore, can during second, carry out display update according to setting by effective timing.
In addition, be illustration the update time of setting in step # 117 or #120, can suitably change.In addition, whether in step # 102 is in the judgement of length shooting during second, and the decision content when whether being long second also can suitably change.In addition, the setting of the update time among the step # 117 is set update time except utilizing division arithmetic merely, can also adopt in the time of for example will growing second to be divided into the zone, to decide various methods such as setting-up time according to each zone.
As described above such, in each execution mode of the present invention, under the situation of with manual shutter mode or long-time second the time, taking, make image pickup part 291 by the update time of repetitive operation at interval, the view data addition successively that will repeat to export from image pickup part 291, generate the addition view data, and carry out the image demonstration according to this addition view data.And set in manual or automatic mode update time.Therefore, can carry out display update by effective timing, the cameraman can confirm under manual shutter mode or the situation that long second, shooting at present made progress.
In addition, in each execution mode of the present invention, when being through with exposure actions, in step #155 (Fig. 7, Figure 14), read image, the addition image (#161) of demonstration after with this image addition., can certainly in step #155, not carry out being presented at the final addition image of obtaining among the step #137 under the situation that image reads.
And then, in the present embodiment, when having set manual shutter mode, press full shutter release button 21 till removing this and pressing entirely, be the 2R switch connection during, shutter is open, and has carried out the shooting action.But, except this way, can also adopt following method, for example when pressing shutter release button 21 (the 1st releasing operation) entirely, begin the shooting action, also proceed the shooting action even removed pressing entirely of shutter release button 21, when pressing shutter release button 21 (the 2nd releasing operation that carries out behind the 1st releasing operation) once more entirely, stop the shooting action.
In addition, in the present embodiment, the example of using single transoid digital camera has been described, but, the present invention also can be the pocket digital camera beyond single transoid etc., in addition, the camera that is built in mobile phone, the portable information terminal (PDA:Personal Digital Assist) etc. is also passable.So long as can carry out the camera head of manual shutter mode and length shooting during second, just can use the present invention.
More than, use the 1st execution mode of the present invention and the 2nd execution mode to be illustrated, still, the invention is not restricted to above-mentioned execution mode, the implementation phase in the scope that does not break away from its purport, its structural element can be out of shape and specialize.In addition, by the appropriate combination of the disclosed a plurality of structural elements of above-mentioned execution mode, can form various inventions.For example, also can from the entire infrastructure key element shown in the execution mode, delete several structural elements.In addition, also can be with the inscape appropriate combination in the different execution modes.
Claims (8)
1. camera head is characterized in that having:
Image pickup part, it comprises the imaging apparatus that shot object image is made a video recording, and generates view data according to the output signal of this imaging apparatus;
Control part, it makes above-mentioned image pickup part repetitive operation in response to a shutter release operation;
The addition handling part, the view data addition successively that it will repeat to export from above-mentioned image pickup part, and generate the addition view data;
Image displaying part, it shows above-mentioned addition view data; And
The configuration part, it sets the repetition period of above-mentioned image pickup part, and above-mentioned control part is indicated.
2. camera head according to claim 1 is characterized in that,
The repetition period of above-mentioned image pickup part is set in response to manual operation in above-mentioned configuration part in prescribed limit.
3. camera head according to claim 1 is characterized in that,
The repetition period of above-mentioned image pickup part is changed according to the brightness degree of above-mentioned addition view data in above-mentioned configuration part.
4. camera head according to claim 1 is characterized in that,
The higher limit of the repetition period of above-mentioned image pickup part is limited according to the dark current characteristic of above-mentioned imaging apparatus in above-mentioned configuration part.
5. camera head according to claim 1 is characterized in that,
Above-mentioned control part is according to the shutter speed that sets, the repetition period of changing above-mentioned image pickup part.
6. camera head according to claim 1 is characterized in that,
Above-mentioned control part makes above-mentioned image pickup part repetitive operation in response to the 1st operation of shutter release button, in response to the 2nd operation of above-mentioned shutter release button the shooting action of above-mentioned image pickup part is stopped.
7. camera head according to claim 1 is characterized in that,
Above-mentioned addition handling part comprises: interim storage part, and it stores the view data of exporting successively from above-mentioned image pickup part independently; And sum operation portion, it carries out sum operation after reading out in the view data of storing in the above-mentioned interim storage part.
8. the control method of a camera head makes image pickup part repetitive operation in the single exposure action, whenever from above-mentioned image pickup part output image data the time this view data phase adduction successively is shown to display part, it is characterized in that,
According to manual operation or shooting condition, change the repetition period of above-mentioned image pickup part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-301017 | 2007-11-20 | ||
| JP2007301017 | 2007-11-20 | ||
| JP2007301017A JP2009130470A (en) | 2007-11-20 | 2007-11-20 | Imaging apparatus and method of controlling the same |
Publications (2)
| Publication Number | Publication Date |
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| CN101442616A true CN101442616A (en) | 2009-05-27 |
| CN101442616B CN101442616B (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101813367A Expired - Fee Related CN101442616B (en) | 2007-11-20 | 2008-11-19 | Imaging device and control method for imaging device |
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| JP (1) | JP2009130470A (en) |
| CN (1) | CN101442616B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248803A (en) * | 2012-02-02 | 2013-08-14 | 奥林巴斯映像株式会社 | Digital camera |
| CN103595921B (en) * | 2012-08-13 | 2016-12-28 | 奥林巴斯株式会社 | Camera head |
| CN109792494A (en) * | 2016-10-04 | 2019-05-21 | 富士胶片株式会社 | Photographic device, still image image capture method and still image imaging program |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5553199B2 (en) * | 2009-11-10 | 2014-07-16 | 株式会社リコー | Imaging apparatus and imaging control method |
| JP2012095094A (en) * | 2010-10-27 | 2012-05-17 | Olympus Imaging Corp | Imaging apparatus and imaging method |
| JP2014121024A (en) * | 2012-12-18 | 2014-06-30 | Olympus Corp | Imaging apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4399133B2 (en) * | 2000-09-08 | 2010-01-13 | カシオ計算機株式会社 | Imaging condition providing device, imaging condition setting system, and imaging condition providing method |
| JP4687001B2 (en) * | 2004-04-15 | 2011-05-25 | 日本電気株式会社 | Mobile terminal device |
-
2007
- 2007-11-20 JP JP2007301017A patent/JP2009130470A/en active Pending
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248803A (en) * | 2012-02-02 | 2013-08-14 | 奥林巴斯映像株式会社 | Digital camera |
| CN103248803B (en) * | 2012-02-02 | 2018-01-19 | 奥林巴斯株式会社 | Digital camera |
| CN103595921B (en) * | 2012-08-13 | 2016-12-28 | 奥林巴斯株式会社 | Camera head |
| CN109792494A (en) * | 2016-10-04 | 2019-05-21 | 富士胶片株式会社 | Photographic device, still image image capture method and still image imaging program |
| CN109792494B (en) * | 2016-10-04 | 2021-01-08 | 富士胶片株式会社 | Image pickup apparatus, still image pickup method, and recording medium |
Also Published As
| Publication number | Publication date |
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| CN101442616B (en) | 2011-02-02 |
| JP2009130470A (en) | 2009-06-11 |
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