CN101388966B - Camera with amplifying display function and camera control method - Google Patents
Camera with amplifying display function and camera control method Download PDFInfo
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- CN101388966B CN101388966B CN2008102151797A CN200810215179A CN101388966B CN 101388966 B CN101388966 B CN 101388966B CN 2008102151797 A CN2008102151797 A CN 2008102151797A CN 200810215179 A CN200810215179 A CN 200810215179A CN 101388966 B CN101388966 B CN 101388966B
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Abstract
The invention provides a camera with an amplifying display function easily used and a control method of the camera. When an amplifying button (34) is operated in a real time view finding display (#55), image data corresponding to an amplifying position are intercepted from up to data image data of a shooting element (221) (#59), and according to the image data, a shot body image is amplified and displayed on a liquid crystal monitor (26) (#61). In addition, automatic focus adjustment is performed through contrast AF way (#62), by using the intercepted image data, amplified display of the shot body image is performed after focusing.
Description
Technical field
The present invention relates to a kind of camera of the band amplifying display function with live view Presentation Function and the control method of camera, in detail, relate to and have on display unit the so-called live view Presentation Function (be also referred to as and browse menu display function, electronic viewfinder function) that shows the image of obtaining by imaging apparatus, and can utilize the picture signal of this live view in showing to carry out the camera of band amplifying display function of focal adjustments of phtographic lens and the control method of camera.
Background technology
In existing digital camera, carry out the observation of shot object image by the optical profile type view finder.But the digital camera of band live view Presentation Function has been proposed recently, this digital camera does not have the optical profile type view finder or shows the image that imaging apparatus is obtained with the optical profile type view finder by the display unit such as LCD monitor that are used to observe shot object image, in addition, started selling the digital camera of this band live view Presentation Function at present on the market.
For example, following digital single-lens reflex camera is disclosed in patent documentation 1: when live view shows, moving reflector is removed from light path of photography, and making focal plane formula shutter is full-gear, shot object image is guided to imaging apparatus, on observing, show thus obtained shot object image with LCD monitor.And, the camera of the amplification live view Presentation Function with the part of only amplifying display image in live view shows is disclosed in patent documentation 2.
[patent documentation 1] TOHKEMY 2002-369042 communique
[patent documentation 2] TOHKEMY 2002-51239 communique
This amplification live view Presentation Function is for confirming that shot object image is very convenient.But, under the situation of a part of amplifying the live view display image,, then become the situation that display image blurs very much if under the situation that not have focusing as the zone of amplifying the object that shows, promptly under the state that focus significantly is offset, amplify demonstration.Therefore, existence is unclear is object with for what, unworkable shortcoming for the cameraman.
Summary of the invention
The present invention finishes in light of this situation, its objective is the camera that wieldy band amplifying display function is provided and the control method of camera.
To achieve these goals, the camera of the band amplifying display function of the 1st invention has: image unit, it receives the subject light beam via phtographic lens incident on shooting face, the shot object image of imaging on this shooting face is carried out opto-electronic conversion and exports the subject view data; Display unit, it uses the subject view data that is obtained by above-mentioned image unit to carry out the live view display action, the amplification live view display mode that this live view display action can select the specific region of full frame live view display mode that the almost Zone Full to photographic picture shows and macrophotography picture to show; And contrast AF unit, it obtains the contrast information from the up-to-date subject view data of above-mentioned image unit output, and according to this contrast information with above-mentioned phtographic lens guide to the focusing permissible range in, when from above-mentioned full frame live view display mode when above-mentioned amplification live view display mode switches, carry out linkedly based on the action of the focal adjustments of above-mentioned contrast AF unit with this switching, above-mentioned contrast AF unit is accompanied by the beginning that above-mentioned amplification live view shows, according to the contrast information of the above-mentioned specific region that is exaggerated above-mentioned phtographic lens is guided in the focusing range.
And, the camera of the band amplifying display function of the 2nd invention is in above-mentioned the 1st invention, above-mentioned contrast AF unit is accompanied by the beginning that above-mentioned full frame live view shows, above-mentioned phtographic lens is guided in the 1st focusing permissible range, be accompanied by the beginning that above-mentioned amplification live view shows, above-mentioned phtographic lens is guided to than in the 2nd narrow focusing permissible range of above-mentioned the 1st focusing permissible range.
The camera of the band enlarging function of the 3rd invention is in above-mentioned the 1st invention, when above-mentioned full frame live view display mode, decide above-mentioned contrast information according to the subject view data corresponding with whole pictures, when above-mentioned amplification live view display mode, decide above-mentioned contrast information according to the subject view data corresponding with above-mentioned specific region.
And, the camera of the band enlarging function of the 4th invention is in above-mentioned the 2nd invention, when having switched to above-mentioned amplification live view display mode, operated under the situation of release-push in the action of focal adjustments is carried out in above-mentioned the 2nd focusing in the permissible range in above-mentioned contrast AF unit, interrupted above-mentioned focal adjustments action.
To achieve these goals, the control method of camera of the 5th invention is following steps: receive the subject light beam via phtographic lens incident on shooting face, the shot object image of imaging on this shooting face is carried out opto-electronic conversion and exports the step of subject view data; Use above-mentioned subject view data, the amplification live view display mode that the full frame live view display mode that selection shows the almost Zone Full of photographic picture and the specific region of macrophotography picture show carries out the step that live view shows; Obtain the contrast information in the up-to-date subject view data, and according to this contrast information, above-mentioned phtographic lens is guided to step in the focusing permissible range by contrast AF mode; And when from above-mentioned full frame live view display mode when above-mentioned amplification live view display mode switches, carry out the step of moving linkedly with this switching based on the focal adjustments of above-mentioned contrast AF mode, in the above-mentioned step that by contrast AF mode above-mentioned phtographic lens is guided in the focusing permissible range, be accompanied by the beginning that above-mentioned amplification live view shows, above-mentioned phtographic lens guided in the focusing range according to the contrast information of the above-mentioned specific region that is exaggerated.
According to the present invention, can provide the camera of the wieldy band amplifying display function that has a live view Presentation Function and the control method of camera.
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 illustrates the integrally-built block diagram of having used the digital single-lens reflex camera in the one embodiment of the present invention.
Fig. 3 is the flow chart that the action that the power connection of the camera body side of an embodiment of the present invention resets is shown.
Fig. 4 is the flow chart that the action that the live view of an embodiment of the present invention shows is shown.
Fig. 5 is the flow chart that the action that the live view of an embodiment of the present invention shows is shown.
Fig. 6 is the flow chart that the action that the live view of an embodiment of the present invention shows is shown.
Fig. 7 is the flow chart of action that the shooting action A of an embodiment of the present invention is shown.
Fig. 8 is the flow chart of action that the shooting action B of an embodiment of the present invention is shown.
Fig. 9 is the flow chart of action that the phase difference AF control of an embodiment of the present invention is shown.
Figure 10 is the flow chart of action that the contrast AF control of an embodiment of the present invention is shown.
Figure 11 is the flow chart of action that the contrast AF control of an embodiment of the present invention is shown.
Figure 12 is the flow chart that the action that the power connection of the replacing camera lens side of an embodiment of the present invention resets is shown.
Figure 13 is the figure of the show state on the LCD monitor that illustrates in the enlarged display mode of an embodiment of the present invention, (A) be the figure that the full frame show state is shown, (B) be that the figure that amplifies show state is shown, (C) be the figure of the state after amplification range is shown moves, (D) being the figure that the amplifier section in (B) is shown, (E) is the figure that the amplifier section in (C) is shown.
Figure 14 is the figure of menu display frame that the AF mode initialization of an embodiment of the present invention is shown.
Figure 15 is the figure that demonstration is finished in focusing that an embodiment of the present invention is shown, is that the figure that the 1st focusing shows is shown (A), (B) is that the figure that the 2nd focusing shows is shown.
Figure 16 is the figure that the driving relationship of the contrast information of an embodiment of the present invention and focus lens is shown, and (A) is the figure that the situation of high speed contrast AF is shown, and (B) is the figure that the situation of high accuracy contrast AF is shown.
Figure 17 is the explanation imaging apparatus of an embodiment of the present invention and the figure that allows the blur circle diameter of LCD monitor, and what imaging apparatus (A) was shown allows the blur circle diameter, and what LCD monitor (B) was shown allows the blur circle diameter.
Figure 18 is the figure that the relation of allowing blur circle diameter and defocus amount of an embodiment of the present invention is shown.
Label declaration
21: release-push; 22: the screening-mode rotating disk; 24: the information setting rotating disk; 26: LCD monitor; 27: continuous shooting/list is clapped button; The 28:AF locking press button; 30: the cross button; 30U: upwards use the cross button; 30D: use the cross button downwards; 30R: use the cross button to the right; 30L: use the cross button left; The 31:OK button; 33: live view the Show Button; 34: large buttons; 37: menu button; 38: reproduce button; 40: the media storage lid; 50: photoflash lamp; 100: change camera lens; 101: photographic optical system; 103: aperture; 105: the optical system position detecting mechanism; 107: the optical system driving mechanism; 109: the aperture driving mechanism; 111: camera lens CPU; 200: camera body; 201: moving reflector; 203: secondary speculum; 205: focusing screen; 207: pentaprism; 211: photometry sensor; 213: focal plane formula shutter; 215: membrane filter; 216: piezoelectric element; 217: infrared cutoff filter/low pass filter; 221: imaging apparatus; 223: the imaging apparatus drive circuit; 225: pre-process circuit; 227: hand is trembled transducer; 229: hand is trembled correcting circuit; 231: the shift mechanism drive circuit; 233: shift mechanism; 235: the membrane filter drive circuit; 237: the moving reflector driving mechanism; 241: the photometry treatment circuit; 243: phase difference AF transducer; 245: phase difference AF treatment circuit; 250:ASIC; 251: sequential controller (host CPU); 252: data/address bus; 253: contrast AF circuit; The 255:AE circuit; 257: image processing circuit; 259: compressed and decompressed circuit; 261: video signal output circuit; 263: the LCD monitor drive circuit; The 265:SDRAM testing circuit; 267:SDRAM; 271: imput output circuit; 273: telecommunication circuit; 275: the recording medium control circuit; 277: recording medium; 279: flash memory control circuit; 281: flash memory; 283: the switch testing circuit; 285: various switches; 300: the communication contact; Focusing in 311: the 1 shows; Focusing in 312: the 2 shows.
Embodiment
Below, with reference to the accompanying drawings, employing has been used digital single-lens reflex camera of the present invention a preferred execution mode has been described.Fig. 1 is the stereoscopic figure that observes the digital single-lens reflex camera of embodiments of the present invention from the back side.
Upper surface at camera body 200 disposes release-push 21, screening-mode rotating disk 22, information setting rotating disk 24 and photoflash lamp 50 etc.Release-push 21 has the 1st release-push and complete the 2nd release-push of on time connecting that the cameraman partly connects on time.Connection by 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 the connection of 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 rotating disk 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 rotating disk 22 with sign, can select various screening-modes such as full-automatic screening-mode (AUTO), program screening-mode (P), aperture priority screening-mode (A), shutter priority screening-mode (S), manual screening-mode (M), portrait screening-mode, landscape screening-mode, microshot pattern, motion screening-mode and night scene screening-mode.
Information setting rotating disk 24 is to constitute rotatable functional unit, in information display screen etc., can select desired set value and pattern etc. by the rotary manipulation of information setting rotating disk 24.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: LCD monitor 26, continuous shooting/list clap button 27, AF 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.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.Display unit is not limited to LCD, both can as long as can carry out these demonstrations.
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 release-push 21 entirely by during take continuously, this list bat pattern is taken one entirely at release-push 21 on time.AF locking press button 28 is the functional units that are used for fixing the focusing of subject.Change composition afterwards thus, the subject of reference object is focused, and operation A F locking press button 28 fixes focusing, even also can make the shooting of focus focusing on reference object.
Cross button 30 is to be used for the functional unit that moves on the two-dimensional directional of directions X and Y direction in instructs cursor on the LCD monitor 26, and, when reproducing the shot object image of displayed record in recording medium, also be used for the selection indication of shot object image.In addition, except being provided with upwards, downwards, left, to the right 4 buttons of usefulness, also can be replaced into soft-touch control functional unit such, that can on two-dimensional directional, operate with the switch of the mode detecting operation direction of two dimension etc.OK button 31 is the functional units that are used for determining the various projects selected by cross button 30 and control rotating disk 24 grades.
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, 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 on LCD monitor 26 that live view shows, information shows it is the pattern that shows the photographing information of digital camera in order to carry out display setting on LCD monitor 26.Large buttons 34 are the functional units that are used for amplifying a part that shows shot object image on LCD monitor 26, by operating above-mentioned cross button 30, can change and amplify the position.
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, portion is provided with the groove that is used to load recording medium 277 within it, and recording medium 277 can be loaded freely with respect to camera body 200 loading and unloading.
Then, use Fig. 2 illustrates the overall structure based on the electrical system of digital single-lens reflex camera.The digital single-lens reflex camera of present embodiment constitutes by changing camera lens 100 and camera body 200.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.Wherein, connecting into photographic optical system 101 is driven by aperture driving mechanism 109 by lens driving mechanism 107 drivings, aperture 103.Detect the focal length and the focal position of the photographic optical system 101 that drives by lens driving mechanism 107 by optical system position detecting mechanism 105.
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 phase difference AF (Auto focus) transducer 243, the output of this phase difference AF transducer 243 is connected with phase difference AF treatment circuit 245.Phase difference AF transducer 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.And phase difference AF transducer 243 can carry out focus detection to a plurality of points in the shooting picture respectively.
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 Oxide Semiconductor: two-dimentional imaging apparatus such as complementary metal oxide semiconductors (CMOS)) in addition, can use CCD (Charge Coupled Device: as imaging apparatus 221 is self-evident.
Imaging apparatus 221 is connected with imaging apparatus drive circuit 223, by this imaging apparatus drive circuit 223, reads picture signal etc. from imaging apparatus 221.Imaging apparatus drive circuit 223 is connected with pre-process circuit 225, and the processing of thinization of pixel, amplification that pre-process circuit 225 carries out live view demonstration usefulness show the preliminary treatment that the image processing such as intercepting processing of usefulness are used.
Between above-mentioned shutter 213 and imaging apparatus 221, dispose membrane filter 215, piezoelectric element 216 and infrared cutoff filter/low pass filter 217.Be fixed with piezoelectric element 216 around membrane filter 215, by membrane filter drive circuit 235, this piezoelectric element 216 utilizes ultrasonic wave to vibrate.By removing dust accompanying on membrane filter 215 at the vibration wave that produces on the piezoelectric element 216.
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.Membrane filter 215, piezoelectric element 216, infrared cutoff filter/low pass filter 217 and imaging apparatus 221 constitute one airtightly, so that dust etc. can not invaded.These incorporate imaging apparatus 223 grades can be passed through shift mechanism 233, move respectively along the X-direction and the Y direction of the shooting face of imaging apparatus 223.
It is to detect because the hand that is applied on the camera body 200 is trembled the transducer that waits the vibration that causes that hand is trembled transducer 227, and it is exported and trembles correcting circuit 229 with hand and be connected.Hand is trembled correcting circuit 229 and is generated and be used to remove hand and the hand of vibration such as tremble and tremble correction signal, and the output that hand is trembled correcting circuit 229 is connected with shift mechanism drive circuit 231.Shift mechanism drive circuit 231 input hands are trembled correction signal, and drive shift mechanism 233 according to this signal.By this shift mechanism 233 imaging apparatus 221 grades are moved, be applied to hand on the camera body 200 with counteracting and vibration such as tremble, carry out vibrationproof thus.
(Application Specific Integrated Circuit: application-specific IC) data/address bus 252 in 250 is connected for pre-process circuit 225 and ASIC.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.Between above-mentioned pre-process circuit 225 and host CPU 251, be connected in parallel to contrast AF circuit 253 and AE circuit 255.Contrast AF circuit 253 extracts radio-frequency component according to the picture signal of exporting from pre-process circuit 225, and to the contrast information of host CPU 251 outputs based on this radio-frequency component.AE circuit 255 is according to the picture signal from pre-process circuit 225 outputs, to the host CPU 251 outputs photometry information corresponding with subject brightness.
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 utilizes compression modes such as JPEG or TIFF that the view data that is stored in SDRAM 267 is compressed.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 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 video signal displayed on LCD monitor 26 to.As shown in Figure 1, 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 both can, and, be not limited to LCD, 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.
Tremble with above-mentioned imaging apparatus drive circuit 223, pre-process circuit 225, hand that imput output circuit 271 that correcting circuit 229, shift mechanism drive circuit 231, membrane filter drive circuit 235, fast door drive mechanism 237, moving reflector driving mechanism 239, photometry treatment circuit 241 and phase difference AF treatment circuit 245 be connected is controlled 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 CPU 111 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 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 memory card (SD memory card) (registered trade mark) or memory stick (Memory Stick) (registered trade mark) etc. any one, and can load and unload freely with respect to camera body 200.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 1st stroke that detects shutter release button 21 (half by) the 1R switch, detect the 2R switch of the 2nd stroke (complete by) and be connected with data/address bus 252 via switch testing circuit 283 at interior various switches 285 by the live view display switch that the operation of live view the Show Button 33 is connected.And, as various switches 285, comprise and clap continuous shooting/list bat switch of button 27 interlocks with the amplification switch of large buttons 34 interlocks, mains switch, with the menu switch of menu button 37 interlocks, with the AF locking switch of AF locking press button 28 interlocks, with continuous shooting/list and with other various switches of other functional unit interlocks etc.
Then, use Fig. 3～flow chart shown in Figure 12 that the action of the digital camera of an embodiment of the present invention is described.Fig. 3 is the action that the power connection based on host CPU 251 of camera body 200 sides resets.Load battery in camera body 200 after, 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, the dust that carries out in the membrane filter 215 is removed action (#7).It is following action, and promptly the piezoelectric element 216 that is fixed on the membrane filter 215 by 235 pairs of membrane filter drive circuits applies driving voltage, removes dust etc. by the ultrasonic vibration ripple.
Then, if there are the information such as screening-mode, iso sensitivity, the shutter speed of manually setting and f-number of utilizing screening-mode rotating disk 22 grades to set, then read in these shooting conditions and shot information (#9).About reading in of shot information, utilize telecommunication circuit 273 to read in lens properties information such as the open aperture of replacing camera lens 100, focus information, camera lens identiflication number by camera lens CPU 111.
Then, carry out photometry/exposure computing (#11).In this step, carry out photometry by 211 pairs of subject brightness of photometry sensor, the computing exposure uses this exposure to come exposure control values such as computing shutter speed and f-number according to screening-mode/shooting condition.Then, on LCD monitor 26, show photographing information (#13).Photographing information is the shutter speed that calculates among the screening-mode/shooting condition that reads among the step # 9 etc. and the step # 11 and exposure control value of f-number etc.
Then, judge whether the live view display switch connects (#15).As mentioned above, utilize live view to show the cameraman and observe under the situation of shot object image, operation live view the Show Button 33.Under the situation that result of determination is connected for the live view display switch, carry out the subprogram (#31) of live view display action.Use Fig. 4～Fig. 6 that this live view display action is narrated below.
Result of determination at step # 15 is under the situation of live view display switch access failure, judges whether reproduce switch connects (#17).Reproduction mode is following pattern: promptly, when reproducing button 38 and carried out operation, the static image data of playback record in recording medium 277, and it is presented on the 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 whether menu switch connects (#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 and show on LCD monitor 26, 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 release-push 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 A for preparing and take.Use Fig. 7 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 # 9, 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. 4～Fig. 6 to come the live view display action of description of step #31.After entering this subprogram, at first, close photographing information and show (#41).In step # 13, photographing information is shown on the LCD monitor 26, still, in this step, in order on LCD monitor 26, to show live view, and stops the demonstration of this photographing information.Then, #11 is same with step, carries out photometry/exposure computing (#43).
Then, make moving reflector 201 remove (#45), open shutter 213 (#47) from the optical axis of photographic optical system 101.By these actions, on imaging apparatus 221, make the shot object image imaging by photographic optical system 101.Then, carry out the initial setting (#49) of live view condition.In this step, in order to carry out the electronic shutter speed in the driving of imaging apparatus 221 and the condition enactment of photosensitivity, the operation result of photometry/exposure that use is obtained in step #43 is used for showing the computing and the setting of the picture of suitable lightness (lightness) on LCD monitor 26.
Then, the beginning (#51) of indication live view demonstration.That is, imaging apparatus 221 and image processing circuit 257 etc. is indicated, the view data mode with dynamic image on LCD monitor 26 that is obtained by imaging apparatus 221 is shown.The cameraman can show to determine photography composition according to this live view.In addition, carry out the control of electronic shutter speed and ISO photosensitivity etc., so that the picture brightness of LCD monitor 26 becomes necessarily in live view shows.Then, carry out contrast AF control (#52).In this subprogram, use live view to show the view data of usefulness, according to the contrast information of contrast AF circuit 253 outputs, control the focal adjustments action, so that photographic optical system 101 becomes focusing state.Use Figure 10 and Figure 11 to narrate this contrast AF control in the back.
When the beginning live view shows, then judge whether partly supress release-push 21, be whether the 1R switch connects (#53).In result of determination is under the situation of 1R switch access failure, judges whether to have operated large buttons 34, promptly amplifies switch and whether connect (#55).Whether in result of determination is to amplify under the situation of switch access failure, jumps to step #71 (Fig. 5), on the other hand, under the situation of amplifying switch connection, judge to be in and amplify in the demonstration (#57).
As mentioned above, large buttons 34 are to be used for amplifying the action button that shows shot object image at the live view display mode, become enlarged display mode when operating one time, remove enlarged display mode when operating once more.Therefore, in step #57, enlarged display mode or end enlarged display mode are proceeded in judgement.
Result of determination at step #57 is not to be under the situation of amplifying in showing, promptly, carrying out the full frame live view display mode that live view shows (non-enlarged display mode, common live view display mode) from the almost Zone Full to photographic picture becomes under the situation of enlarged display mode, intercept the indication (#59) of scope, indication begins to amplify demonstration (#61).By pre-process circuit 225 is indicated, from reading the intercepting view data corresponding from the view data of imaging apparatus 221 with amplification range, amplify demonstration.Then, use in step #61 and amplifying the view data of using when showing, degree of comparing AF controls (#62).In this step, degree of comparing AF control is so that the focus focusing is being amplified on the subject of demonstration.Use Figure 10 and Figure 11 at length to narrate in the back.
Under the situation in the result of determination of step #57 shows for amplification, finish enlarged display mode and return the processing that the full frame live view shows.That is, pre-process circuit 225 is carried out the indication (#63) that full frame is exported, image processing circuit 257 is stopped to amplify the indication (#65) of demonstration.When the processing of step #62 or #65 finishes, enter step #71, judge and whether carried out the operation of cross button 30.
Whether the result of determination at step #71 is to have operated under the situation of cross button 30, then judge to be in and amplify in the demonstration (#73).In the result of determination of step #71 or #73 any is under the situation of "No" (N), jump to step #77, but, under the situation that is judged to be "Yes" (Y) of two steps, promptly be in amplify to show in and operated under the situation of crossbar switch mobile (#75) of the magnification region that indication and cross button 30 are corresponding.
Like this, in the present embodiment, enter the live view display mode after, shown in Figure 13 (A), full frame shows shot object image (#51) on LCD monitor 26.Under this state, when having operated large buttons 34 (#55), shown in Figure 13 (B), amplify demonstration shot object image (#61).Shown in Figure 13 (D), this amplification shows it is the part that full frame shows.Then, when having operated cross button 30 (#71), demonstration (#75) is amplified in the position corresponding with the operation of this cross button 30.Shown in Figure 13 (E), this moment be shown enlarged in the part that full frame shows corresponding to the corresponding position of the operation of cross button 30.In addition, when amplifying demonstration, degree of comparing AF control in step #62 is so become the image of focusing.
Then, judge with the live view display switch of live view the Show Button 33 interlocks whether connect (#77).When live view the Show Button 33 of operation, become the live view display mode, when operating live view the Show Button 33 once more, remove the live view display mode.Under the situation of result of determination of step #77, finish the live view display mode in the step below step #85 for connection.
Result of determination at step #77 is under the situation of live view display switch access failure, judges with the reproduction switch that reproduces button 38 interlocks whether connect (#79).Reproduction mode needs end live view display mode in order to reproduce the view data of displayed record in the recording medium 277 on LCD monitor 26.Under the situation of result of determination of step #79, finish the live view display mode in the step below step #85 for connection.
Under the situation of result of determination of step #79, judge with the menu switch of menu button 37 interlocks whether connect (#81) for reproduction switch access failure.Menu is set pattern and is shown in order to carry out menu on LCD monitor 26, needs to finish the live view display mode.Under the situation of result of determination of step #81, finish the live view display mode in the step below step #85 for connection.
Result of determination at step #81 is under the situation of menu switch access failure, judges whether mains switch connects (#83).In result of determination is under the situation of mains switch disconnection, in order to carry out the power supply disconnection process, at first finishes live view in the step below step #85 and shows.Under the situation of result of determination of step #83 for connection, return step #53, repeat above-mentioned action.
Show in order to finish live view, when transferring to step #85, at first turn off focusing and show (#85).As described later, on subject to defocused, as Figure 15 (A) (B) shown in, show that the 1st focusing shows that the 311 and the 2nd focusing shows 312, so, then turn off this focusing demonstration if carrying out this focusing shows.Then, stop indication (#87) to what pre-process circuit 225 and image processing circuit 257 etc. carried out that live view shows.Then, to shutter 213 indication shutter close actions (#89), make moving reflector 201 carry out homing action (moving) (#91), and return original program to down position.
Result of determination at step #53 (Fig. 4) is under the situation of 1R switch connection, reads in AE information (#101, Fig. 6).About the photometry among the step #43, because moving reflector 201 is positioned at down position, thus can carry out photometry by photometry sensor 211, but in this step, moving reflector 201 is positioned at removes position (lifting position), can't carry out photometry by photometry sensor 211.Therefore, the output according to AE circuit 255 obtains AE information.
Then, judge whether be the pattern (#103) of only carrying out phase difference AF.Can carry out the selection of AF pattern in the selection picture (with reference to Figure 14) of the AF pattern in the menu setting action of step #35.That is, in the present embodiment, can select the arbitrary pattern in the following pattern: only carry out i-AF pattern based on the contrast AF of the output of imaging apparatus 221; Only carry out PD-AF pattern based on the phase difference AF of the output of phase difference AF transducer 243; And degree of comparing AF and phase difference AF both sides' i-AF+PD-AF pattern.
If the result of determination of step # 103 then jumps to step #107 for only carrying out the pattern of phase difference AF, on the other hand, if the result of determination of step # 103 is for being not the pattern of only carrying out phase difference AF, then degree of comparing AF control (#105).In this contrast AF control, as mentioned above, according to controlling, so that photographic optical system 101 becomes focusing state from the contrast information of contrast AF circuit 253.When amplifying the live view demonstration (#53 → #55), use and amplify view data degree of the comparing AF control that shows usefulness, but, in step # 105, owing to be full frame live view display mode (non-amplification live view demonstration, common live view show), so, use full frame to show view data degree of the comparing AF control of usefulness.Use Figure 10 and Figure 11 at length to narrate this contrast AF control in the back.
Then, judge whether supress release-push 21 entirely, be whether the 2R switch connects (#107).If result of determination is an access failure, then return step #53, repeat above-mentioned step.On the other hand, if connect, then carry out in the step below step # 109 and take action.
After entering the shooting action, at first stop live view and show (#109).Then close shutter 213 (#111).In live view showed, open shutter 213 to show shot object image according to the output of imaging apparatus 221, but to take action and Temporarily Closed shutter 213 in order entering on LCD monitor 26.
Then, judge whether be in the 2nd focusing demonstration (#113).In the subprogram of contrast AF control, can carry out the 1st contrast AF that phtographic lens is guided in the 1st focusing permissible range controls and phtographic lens is guided to than the 2nd contrast AF control in the 2nd narrow focusing permissible range of the 1st focusing permissible range, under the situation that the 2nd contrast AF control finishes, carry out the 2nd focusing and show (#277 among Figure 11 and Figure 15 (B)).In this step # 113, judge whether be in this high-precision the 2nd focusing state.
If in step # 113, be not in the 2nd focusing demonstration, then judge whether satisfy the not condition of needs phase difference AF (#115).Have as the condition that does not need phase difference AF: (1) compares phtographic lens with setting focal length is positioned at wide-angle side, (2) f-number (the aperture bore is little), (3) subject distance more than setting becomes depth of field being shot than the 1st wide situation of permissible range of focusing for the foregoing reasons for the remote side far away than predetermined distance etc.That is, satisfying under the situation of these conditions, considering that only carrying out the 1st contrast AF control just can obtain the precision of focusing fully, so do not need further to carry out high-precision phase difference AF.
In step # 115, satisfy under the situation of the condition of needs phase difference AF not, judge with the AF locking switch of AF locking press button 28 interlocks whether connect (#117).In result of determination is under the situation of AF locking switch access failure, carries out phase difference AF in the step below step #119.That is, the result of determination at step # 113, #115, step # 117 all is under the situation of "No" (N), to carry out high-precision AF by phase difference AF.
In order to carry out phase difference AF, at first make moving reflector 201 reduction, and in the light path of photographic optical system 101 (#119).Thus, the subject light beam that phase difference AF is used is directed to phase difference AF transducer 243.Then carry out phase difference AF control (#121).In this step, by known phase difference AF, that detects photographic optical system 101 defocuses direction and defocus amount, defocuses the drive controlling that direction and defocus amount are carried out optical system driving mechanism 107 according to this, carries out the focusing of photographic optical system 101.Use Fig. 9 to carry out detailed narration in the back.
When phase difference AF control finishes, make moving reflector 201 move to lifting position, that is, make it remove (#123).Thus, will be directed to imaging apparatus 221 by the subject light beam of photographic optical system 101 once more, and image on the imaging apparatus 221.
Result of determination at above-mentioned steps #113, #115 all is under the situation of "Yes" (Y), do not need to carry out high-precision AF by phase difference AF, in addition under the situation that the result of determination of step # 117 is connected for the AF locking switch, the cameraman has determined focusing position, take action so directly enter, so that focusing position can still, will not turned off focusing and show (#127) before this owing to phase difference AF changes.After step # 123 or step # 127 finish, then take action B, this shootings is moved B and is carried out based on the obtaining and writing down of the view data of shot object image (#125).B uses Fig. 8 to narrate in the back about this shooting action.When taking action B end, return step #43, and begin the live view demonstration once more, and repeat above-mentioned action.
Then, use Fig. 7 to come the subprogram of the shooting action A among the description of step #37.This shooting action A is under common optical finder observation state (be non real-time find a view demonstrations), the subprogram of execution when partly pressing release-push 21.After entering the subprogram of taking action A, at first close photographing information and show (#131).Then, #121 is same with step, the subprogram (#133) of excute phase difference AF control.That is,, obtain and defocus direction and defocus amount, carry out the focusing of photographic optical system 101 according to the output of phase difference AF transducer 243.Use Fig. 9 to be described in detail this subprogram in the back.
When phase difference AF finished, #11 was same with step, carried out photometry/exposure computing, obtained exposure control values (#135) such as shutter speed and f-number.Then, judge whether supress release-push 21 entirely, be whether the 2R switch connects (#137).In result of determination is under the situation of 2R switch access failure, judges whether the 1R switch connects (#157).In result of determination is under the situation of 1R switch access failure, finishes to take action A, returns original program.On the other hand, be under the situation of 1R switch connection in result of determination, return step # 137, become the holding state of the state that detects 1R switch and 2R switch.
When the result of determination of step # 137 is the 2R switch connection, transfer to the step that is used to take.That at first, carries out moving reflector 201 removes action (moving to lifting position) (#139).Thus, will be directed on the imaging apparatus 221, carry out imaging based on the subject light beam of photographic optical system 101.Then, camera lens CPU 111 indication apertures are dwindled action (#141), also indicate aperture reduction volume (#143) in the lump.
Thus, carried out entering the preparation of shooting action, so beginning exposure actions (#145).In exposure, the moving of the preceding curtain of beginning shutter 213, and the electric charge accumulation of beginning imaging apparatus 221.When passed through with shutter speed of in step # 135, obtaining or the shutter speed time corresponding manually set by the cameraman after, the moving of the back curtain of beginning shutter 213, and finish the electric charge accumulation of imaging apparatus 221.
After exposure actions finishes, to the open indication (#147) of camera lens CPU 111 output apertures.Then, the homing action (#149) that moving reflector 201 is moved to down position, and read picture signal (#151) from imaging apparatus 221.By image processing circuit 257 grades the picture signal of being read is carried out image processing (#153), with the Imagery Data Recording (#155) in recording medium 277 after handling.After the image record end, return original program.
Then, use Fig. 8 to come the subprogram of the shooting action B among the description of step #125 (Fig. 6).This shooting action B is the subprogram of carrying out when supressing release-push 21 entirely under the live view show state.After entering the subprogram of taking action B, carry out exposure computing (#161) according to the output of AE circuit 255.
Then, same with step # 141, #143, carry out aperture and dwindle indication, and carry out the indication (#163, #165) of aperture reduction volume.Then, #145 is same with step, carries out exposure actions (#167), thus, according to the output of imaging apparatus 221, obtains the view data of shot object image.Then, same with step # 147, #151, #153, #155, indication aperture open (#169) is read picture signal (#171), carries out image processing (#173), and is recorded in (#175) in the recording medium 277.After the image record end, return original program.
Then, use Fig. 9 to come the subprogram of the phase difference AF control among description of step #121 (Fig. 6) and the step #133 (Fig. 7).In this phase difference AF control, use two light beams of photographic optical system 101 peripheries, by known phase difference mode, that can obtain photographic optical system 101 defocuses direction and defocus amount, can carry out with contrast AF in the high-precision AF of high-precision A F same degree.
When entering the subprogram of phase difference AF control, at first whole focus detection of putting (#181).That is, defocus direction and defocus amount about detecting by phase difference AF transducer 243 and phase difference AF treatment circuit 245 detected whole points.Then, from detected whole points, select the point (#183) of minimum distance.Under the situation, main subject is nearest subject, so carry out this selection mostly.
Then, judge whether entered (#185) in the focusing range according to the defocus amount of selected closest approach.About whether having entered the determinating reference in the focusing range, be to utilize defocus amount whether to enter based on judging in the focusing decision content of allowing blur circle.If result of determination is then returned original program for being in the focusing range.In addition, according to the shooting resolution of imaging apparatus 221, be that the Pixel Dimensions of imaging apparatus 221 is set this and allowed the blur circle diameter.
On the other hand, in result of determination is under the situation about not being in the focusing range, according to selected focus detection point defocus direction and defocus amount, come computing to drive the driving direction and the driving amount (#187) of photographic optical systems 101 by optical system driving mechanism 107.Then, to the lens driving control (#189) of camera lens CPU111 indication optics system drive mechanism 107, and indication lens driving amount and driving direction (#191) at this moment.
When host CPU 251 during, wait for the signal of finishing by camera lens CPU 111 input expression lens driving (#193) to the indication of camera lens CPU 111 output lens drive controlling.When lens driving is finished, the focus detection point of selecting is carried out focus detection (#195) in step #183.When focus detection finishes, return step # 185, repeat above-mentioned step till entering focusing range.
Then, use Figure 10 and Figure 11 to come the subprogram of the contrast AF control among description of step #52 (Fig. 4), step #62 (Fig. 4) and the step #105 (Fig. 6).The driving of photographic optical system 101 is carried out in this contrast AF control, so that be maximum based on the contrast information in the contrast AF circuit 253 of the output of imaging apparatus 221.Be positioned at moving reflector 201 and remove position (lifting position) and can't carry out phase difference AF control based on the output of phase difference AF transducer 243 time, can use this contrast AF control.And, in contrast AF control, have following two patterns: with at a high speed but the high speed contrast AF (the 1st contrast AF) that the 1st low focusing precision of focusing precision is carried out AF control; With with low speed but the high accuracy contrast AF (the 2nd contrast AF) that the 2nd high focusing precision of focusing precision is carried out AF control.
Beginning the 1st contrast AF after the subprogram that enters contrast AF control, at first register DC is set to 1 (#201).This register DC is the register that is used for the driving direction of definite lens driving.Then, camera lens is set and stretches out direction as lens driving direction (#203).Then, the 1st setting is set as lens driving amount (#205).In Figure 16 (A), the 1st setting is equivalent to the overhang LD1 of focus lens, and, be with corresponding to the related amount of defocus amount Δ fLCD of allowing blur circle diameter phi LCD on the LCD monitor face among Figure 18.
Then, obtain contrast information (#207) from contrast AF circuit 253.In the case, when the live view that just carries out non-amplification shows, obtain the contrast information of the view data corresponding with shooting picture integral body.And when amplifying demonstration, under the situation of 1R switch connection, obtained here contrast information is according to the truncated picture data obtain in order to amplify demonstration.The contrast information of obtaining in step # 215 described later etc. also is same.Then, to camera lens CPU 111 indication camera lens drive controlling (#209), and be sent in lens driving amount, the driving direction of setting among step # 203, the #205 (#211).When having sent these signals, camera lens CPU 111 drives photographic optical system 101 by optical system driving mechanism 107.When the drive controlling based on driving direction that sets and driving amount finished, 111 pairs of host CPUs of camera lens CPU 251 sent lens driving and finish signal.
Result of determination at step # 217 is that contrast was compared with last time under the situation of reduction, and whether the value of criterion register DC is 1 (#221).In result of determination is that register DC is under 1 the situation, makes lens driving direction opposite with last time (#223), returns step #209, and repeats above-mentioned step.
That is, when initial lens drives,, therefore temporarily drive camera lens to stretching out direction because driving direction is not clear.If the result who drives improves for contrast, driving direction correct (near focusing position) then, on the other hand, if the contrast reduction, then driving direction is rightabout (away from a focusing position), so the inversion driving direction.Therefore,, enter step # 223 and make the driving direction counter-rotating, on the other hand,, then be judged to be contrast and crossed peak, enter step #224 if register DC is not 1 if register DC is 1 then to be judged as be first driving.
In the result of determination of step # 221 is that register DC is not under 1 the situation, then judge whether be in amplify show in (#224).In result of determination is to be under the situation of amplifying in showing, jumps to step #251 (Figure 11).This be for, be judged to be contrast information crossed temporarily peak (#221 → N) and this moment for the situation of amplifying the live view display mode under (#224 → Y), transfer to high the 2nd contrast AF control of ratio of precision the 1st contrast AF immediately.Result of determination at step #224 is not to be under the situation of amplifying in showing, is in the state of the peak of having crossed contrast information, so, make driving direction become the direction opposite (#225) with last time.Then, the 2nd setting is set as lens driving amount (#227).
In Figure 16 (A), be equivalent to half of overhang LD1 of focus lens as the 2nd setting of lens driving amount.Because crossed the peak of contrast,, be half of the 1st setting so the hypothesis peak is positioned at last time and this centre.Then, to camera lens CPU 111 indication camera lens drive controlling (#229), be sent in lens driving amount and the driving direction (#231) set among step # 225, the #227.
When camera lens CPU 111 receives lens driving control indication when waiting,, when the driving amount that driven based on the 2nd setting, host CPU 251 is sent lens driving finish signal optical system driving mechanism 107 beginning drive controlling.Host CPU 251 waits for that lens driving finish the reception (#233) of signal, receive finish signal after, carry out the 1st focusing and show (#235).Shown in Figure 15 (A), on the display surface of LCD monitor 26, be shown as the 1st focusing and show 311.
Even be not suitable for taking and also can confirm shot object image by LCD monitor 26 if carry out state that the 1st focusing shows, then in full frame live view display mode (non-amplification live view display mode, common live view display mode), for there not being the focusing state of the bad level of obviously focusing, according to the display resolution of LCD monitor 26, promptly set this focusing permissible range based on the blur circle diameter of allowing of the display dot size of LCD monitor 26.Therefore, become the required sufficient focusing precision of observation shot object image on LCD monitor 26.
Then, indication camera lens location information request (#241).Camera lens CPU 111 obtains lens location information from optical system position detecting mechanism 105, and sends to host CPU 251.Host CPU 251 is obtained this lens location information (#243) of sending.
When in step # 235, having carried out the 1st focusing demonstration, become low focusing state by contrast AF control, return original program.After turning back to original program, pressing release-push 21 entirely and entering under the situation of taking action (the step # 107 of Fig. 6), satisfying under the situation of rated condition, in step #121, utilize high-precision phase difference AF to control to have carried out focusing control after, carry out the shooting action B of step #125.In addition, obtaining lens location information in step # 241, #243 is to be used for judging whether satisfy the not condition of needs phase difference AF at step # 115.
In step #224, be under the situation about amplify showing, in order to carry out the 2nd contrast AF, and obtain contrast information (the step # 251 of Figure 11).
Then, driving direction is arranged to the direction opposite with last time (#253), the 3rd setting is set as driving amount (#255).Here, opposite driving direction being set is because owing to be judged to be the peak that contrast reduces, promptly crossed contrast information in step # 217, focusing is positioned at the rightabout of driving direction before.In Figure 16 (B), the 3rd setting is equivalent to the overhang LD3 of focus lens, and, be with corresponding to the related amount of defocus amount Δ fimg of allowing blur circle diameter phi img on the shooting face of the imaging apparatus among Figure 18 211.
Then, to camera lens CPU 111 indication camera lens drive controlling (#257), and be sent in lens driving amount, the driving direction of setting among step # 253, the #255 (#259).Camera lens CPU 111 control optical system driving mechanisms 107 carry out the drive controlling of photographic optical system 101.When drive controlling finishes, host CPU 251 is sent lens driving finish signal, so host CPU 251 becomes holding state and finishes signal (#261) up to receiving this lens driving.
If the result of determination of step # 285 disconnects for the 1R switch, then return step # 257, as long as contrast improves, just repeat above-mentioned steps.On the other hand, under the situation of 1R switch connection, jump to step #279, after the processing of having carried out step #279, #281, return original program.This has stipulated that the action during the 1R switch connection if the 1R switch connection then interrupts the 2nd contrast AF, and is returned original program when carrying out carrying out the 2nd contrast AF after the 1st focusing shows.That is, under the situation of 1R switch connection, because step #53 → Y, so take the warming-up exercise that moves in order to transfer to, and interrupt the 2nd contrast AF.
When the result of determination of step # 265 is the contrast reduction, driving direction is arranged to the direction opposite with last time (#267), set the 4th setting as driving amount (#269).In Figure 16 (B), be equivalent to half of overhang LD3 of focus lens as the 4th setting of lens driving amount.Owing to surpassed the peak of contrast,, be half of the 3rd setting so the hypothesis peak is positioned at last time and this centre.
Then, to camera lens CPU 111 indication camera lens drive controlling (#271), be sent in lens driving amount and the driving direction (#273) set among step #267, the #269.When camera lens CPU 111 receives lens driving control indication etc., carry out drive controlling by optical system driving mechanism 107, when drive controlling is finished, host CPU 251 is sent driving finish signal.Host CPU 251 becomes the state (#275) that this lens driving is finished signal that wait for to receive, when receive drive finish signal after, carry out the 2nd focusing and show (#277).
This shows shown in Figure 15 (B), carries out the 1st focusing and show that the 311 and the 2nd focusing shows 312 on the display surface of LCD monitor 26.Show that the 2nd focusing shows that 312 state is the high-precision focusing state of allowing blur circle diameter same degree with the pixel of imaging apparatus 221, and, with the focusing precision same degree of phase difference AF.After carrying out the 2nd focusing demonstration 312, then similarly indicate camera lens location information request (#279) with step # 241, similarly obtain shot information (#281) with step #243, and return original program.
In the present embodiment, under the situation of the peak that has passed through contrast, make the driving amount drive (#225, #227, #267, #269) round about, but be not limited thereto, for example also can move to the peak of contrast by interpolation arithmetics such as 3 point interpolation methods for half.
Like this, in the present embodiment, in the live view display mode, carried out amplifying (#55 → #75), carry out focal adjustments action (#62) when showing by contrast AF control.Therefore, in amplifying the live view display mode, the display image that focus significantly is offset can not become very fuzzy situation.Can provide know what is an object with, the camera of wieldy band amplifying display function and the control method of camera for the cameraman.And in the present embodiment, after entering the live view display mode, degree of comparing AF controls (#52).Therefore, even in live view shows, also can in LCD monitor 26, observe to defocused shot object image, and, when transferring to amplification live view display mode, can promptly focus to amplifying shot object image.And then, in the present embodiment, in full frame live view display mode (common live view display mode), photographic optical system 101 is guided in the 1st focusing permissible range, when transferring to amplification live view display mode, photographic optical system 101 is guided to than in the 2nd narrow focusing permissible range of the 1st focusing permissible range.Therefore, also can focus accurately at the shot object image after amplifying.And then in the present embodiment, the focusing permissible range of full frame live view display mode is the 1st focusing permissible range, and the 2nd focusing permissible range during than amplification live view display mode is big.This be because, and compare when the live view display mode shifts to amplifying, in the full frame live view display mode, the focusing of shot object image is bad not obvious on LCD monitor 26.Therefore, has the advantage that makes contrast AF high speed.And then, in the present embodiment, the truncated picture data generate contrast information in order to amplify the live view demonstration in contrast AF control use when amplifying the live view display mode, so can carry out the focal adjustments action to display image accurately.
And then, in the present embodiment, after step #52, step #62 or step # 105 have carried out contrast AF, in step #121, carry out phase difference AF.In the contrast AF of step #52, step #62 or step # 105, carry out at a high speed and hang down the focal adjustments of focusing precision at least, in step #121, carry out high-precision phase difference AF then.The focusing precision of contrast AF is low precision (the 1st focusing precision), but become focusing state roughly, so begin till finishing high-precision focal adjustments, not need so much time from this focusing state, therefore, can delay time less and high-precision focal adjustments.
And then, in the amplification live view display mode of present embodiment, enter the 2nd contrast AF pattern, in the judgement of step # 113, under the situation of under the situation of having carried out the 2nd focusing demonstration, promptly having carried out with high accuracy contrast AF focusing, omit the phase difference AF among the step #121.That is, in the present embodiment, have: the 1st focal adjustments pattern of carrying out focal adjustments by the combination of high speed contrast AF and phase difference AF; With the 2nd focal adjustments pattern of after high speed contrast AF, carrying out focal adjustments, still,, time-delay can be shortened the required time quantum of phase difference AF by omitting phase difference AF by high accuracy contrast AF.And, in high accuracy contrast AF, can carry out the high-precision focal adjustments with phase difference AF same degree, can guarantee the precision of focusing fully like this.
And then, in the step # 115 of present embodiment, judge the condition do not need phase difference AF, meeting this not under the situation of needs condition, omit the phase difference AF among the step #121.Therefore, time-delay can be shortened the required time quantum of phase difference AF, and can carry out high-precision focal adjustments.In addition,, utilize 3 conditions to judge in the present embodiment, but be not limited thereto, can append other condition, also can omit some condition as the condition that does not need phase difference AF.In a word, as long as, just can omit phase difference AF even be in and do not carry out high-precision phase difference AF also can obtain to focus the fully state of precision.
And then, in the step # 117 of present embodiment, judge whether carried out the AF locking, under the situation of having carried out the AF locking, omit the phase difference AF among the step #121.Therefore, time-delay can be shortened the required time quantum of phase difference AF.Especially under the situation of having carried out the AF locking, the cameraman has determined focusing position and has wished promptly to take mostly, and has carried out the 1st focusing demonstration at least, can guarantee focusing precision roughly like this.In addition, in the present embodiment, under the situation of having operated AF locking press button 28, omit phase difference AF, but be not limited to AF locking press button 28, also can under the situation of having operated other functional units, omit phase difference AF.
Then, use Figure 16～Figure 18 that the focusing precision of the contrast AF of present embodiment is described.Shown in Figure 17 (A), the pixel as the shooting face of imaging apparatus 221 is made as horizontal 3648 pixels, vertical 2738 pixels.On the other hand, the LCD monitor of LCD monitor 26 is looked like shown in Figure 17 (B), constitute by horizontal 640 pixels, vertical 320 pixels, so compare with imaging apparatus 221, allow the blur circle diameter be approximately its about 1/7, even consider the LPF coefficient, also greatly about about 1/4, so the blur circle diameter phi LCD that allows of LCD monitor 26 is:
φLCD＝(3648/640)*φimg/α
≒4*φimg。
And the LCD monitor of allowing blur circle diameter phi LCD that is equivalent to LCD monitor 26 is with allowing that defocus amount Δ fLCD is:
ΔfLCD＝φLCD/F
Here, F: the f-number of camera lens (FNo.)
F=D/f (D: bore, f: focal length)
Therefore, the 1st focusing shows that the focusing precision of (#235) is made as the 1st setting with the driving amount, as the 1st setting, shown in Figure 16 (A), if adopt β * Δ f LCD, then can obtain the focusing precision of allowing blur circle diameter phi LCD degree of LCD monitor 26.Here ， β ≒ 5～15 (β is an empirical value).
On the other hand, shown in Figure 17 (A), the shooting face of imaging apparatus 221 (sensitive surface) is made of horizontal 3648 pixels, vertical 2838 pixels.The blur circle diameter phi img that allows of this imaging apparatus 221 is:
φimg＝α*X
Here, α: LPF coefficient (=1.5～2)
X: Pixel Dimensions.
The LPF coefficient is based on the coefficient of the influence of infrared cutoff filter/low pass filter 217, so the blur circle diameter phi img that allows of imaging apparatus 221 multiply by by the Pixel Dimensions to imaging apparatus to have considered that the coefficient behind the low pass filter obtains.
And the shooting of allowing blur circle diameter phi img that is equivalent to imaging apparatus 221 is with allowing that defocus amount Δ fimg is:
Δfimg＝φimg/F
Here, F: the f-number of camera lens (F No.)
F=D/f (D: bore, f: focal length)
Therefore, the 2nd focusing shows that the focusing precision of (#277) is made as the 2nd setting with the driving amount, shown in Figure 16 (B),, then can obtain the focusing precision of allowing blur circle diameter phi img degree of imaging apparatus 221 if adopt γ * Δ fimg as the 2nd setting.Here ， γ ≒ 3 (γ is an empirical value).In addition, the pixel count etc. of explanation is an example in separately, as long as determine corresponding with the design load of the camera here allow blur circle diameter, defocus amount, driving amount.In addition, the focusing permissible range among the phase difference AF is also determined according to Δ fimg.
Then, use Figure 12 illustrates the action among the camera lens CPU 111 that changes camera lens 100.At first judge whether carried out shot information request indication (#301) by host CPU 251.In result of determination is to have carried out sending shot information (#311) under the situation of request indication.The shot information here is the intrinsic information of camera lenses such as information of opening color balance information, the aberration information of f-number, minimum aperture value, camera lens, being used for AF, and this shot information is to be stored in the camera lens CPU 111 or the information in the not shown erasable memories of writing such as EEPROM.
Result of determination at step # 301 is not to be under the situation of shot information request indication, judges whether be lens location information request (#303).In result of determination is to be under the situation of location information request, sends lens location information (#313) to host CPU 251.Lens location information is detected by optical system position detecting mechanism 105, so send this information.
Result of determination at step # 303 is not to be under the situation of location information request indication, judges whether be that aperture dwindles indication (#305).In result of determination is to be that aperture dwindles under the situation of indication, then receives the aperture reduction volume (#315) of sending from host CPU 251.When receiving the aperture reduction volume, control is dwindled driving (#317) by the aperture of the aperture 103 that aperture driving mechanism 109 carries out.
Result of determination at step # 305 is to be not that aperture dwindles under the situation of indication, judges whether be the open indication of aperture (#307).In result of determination is to be under the situation of the open indication of aperture, and control is opened driving (#319) by the aperture of the aperture 103 that aperture driving mechanism 109 carries out.
Result of determination at step # 307 is not to be under the situation of the open indication of aperture, judges whether be that (#309) indicated in lens driving control.In result of determination is to be under the situation of lens driving control indication, receives the lens driving amount and the driving direction (#321) that continue to send.When receiving lens driving amount and driving direction, camera lens CPU 111 control optical system driving mechanisms 107 carry out the drive controlling (#323) of photographic optical system 101.Then, when having driven the driving amount of regulation, send lens driving to host CPU 251 and finish signal (#325).
Have in embodiments of the present invention: imaging apparatus 221, it receives the subject light beam via photographic optical system 101 incidents on shooting face, the shot object image of imaging on this shooting face is carried out opto-electronic conversion and output map subject view data; LCD monitor 26, it uses the subject view data that is obtained by imaging apparatus 221 to carry out the live view display action, the amplification live view display mode (#15, #55) that this live view display action can select the specific region of full frame live view display mode that the almost Zone Full to camera coverage shows and macrophotography scope to show; And contrast AF unit (contrast AF circuit 253, optical system driving mechanism 107 etc.), it obtains the contrast information from the up-to-date subject view data of imaging apparatus 221 outputs, according to this contrast information above-mentioned phtographic lens is guided in the focusing permissible range, when from full frame live view display mode when amplifying the live view display mode and switch, carry out the focal adjustments action (#62) of contrast AF unit linkedly.
Like this, in the present embodiment, when transferring to enlarged display mode (#55), degree of comparing AF controls (#62).Therefore, in amplifying the live view display mode, can not become owing to focus significantly is offset the situation that makes display image very fuzzy.Can provide know what is an object with, the camera of wieldy band amplifying display function for the cameraman.
In addition, in the present embodiment, about whether having arrived the 1st and the 2nd focusing state, whether foundation has carried out the 1st and the 2nd focusing shows that (#235, #277) judges, even but do not focus demonstration, come method that it is judged etc. by mark is set, obviously also can judge whether arrived the 1st and the 2nd focusing state.In addition, in the present embodiment, after entering the live view display mode, carry out auto-focus by contrast AF mode and regulate (#52), even but not carrying out auto-focus here regulates, when entering amplification live view display mode, also can carry out regulating based on the auto-focus of contrast AF mode.
In addition, in the present embodiment, also, the subject light beam is switched to finder optical system and imaging apparatus, but be not limited thereto, also can dispose semi-transparent semi-reflecting lens and separate the subject light beam by the adjustment up and down of moving reflector 201.And then, identical based on the degree of the focusing precision of the phase difference AF precision when the 2nd focusing based on high accuracy contrast AF shows, but being not limited thereto, the focusing precision that also can make the either party is a high accuracy.Precision when but, being higher than the focusing of the 1st among the high speed contrast AF and showing based on the focusing precision of phase difference AF.And then, in the subprogram of phase difference AF control, in focus detection point, selected nearest point (#183), but be not limited thereto, also can select a plurality of focus detection results' median etc., can suitably handle a plurality of focus detection results by estimating computing in addition.
In addition, the example of using single transoid digital camera has been described in the present embodiment, but, also can be so-called minicam and portable phone or PDA (portable information terminal: etc. internally-arranged type camera Personal Digital Assistant) as camera.No matter be which kind of type,, just can use the present invention so long as carry out the live view demonstration and can control the electronic image pickup devices such as camera that carry out focal adjustments by contrast AF.
Claims (5)
1. the camera with amplifying display function is characterized in that, the camera of this band amplifying display function has:
Image unit, it receives the subject light beam via phtographic lens incident on shooting face, the subject image of imaging on this shooting face is carried out opto-electronic conversion and exports the subject view data;
Display unit, it uses the subject view data that is obtained by above-mentioned image unit to carry out the live view display action, the amplification live view display mode that this live view display action can select the specific region of full frame live view display mode that the almost Zone Full to photographic picture shows and macrophotography picture to show; And
Contrast AF unit, it obtains the contrast information from the up-to-date subject view data of above-mentioned image unit output, and according to this contrast information above-mentioned phtographic lens is guided in the focusing permissible range,
When from above-mentioned full frame live view display mode when above-mentioned amplification live view display mode switches, carry out linkedly based on the focal adjustments of above-mentioned contrast AF unit with this switchings and to move,
Above-mentioned contrast AF unit is accompanied by the beginning that above-mentioned amplification live view shows, according to the contrast information of the above-mentioned specific region that is exaggerated above-mentioned phtographic lens is guided in the focusing range.
2. the camera of band amplifying display function according to claim 1 is characterized in that,
Above-mentioned contrast AF unit is accompanied by the beginning that above-mentioned full frame live view shows, above-mentioned phtographic lens is guided in the 1st focusing permissible range, be accompanied by the beginning that above-mentioned amplification live view shows, above-mentioned phtographic lens is guided to than in the 2nd narrow focusing permissible range of above-mentioned the 1st focusing permissible range.
3. the camera of band amplifying display function according to claim 1 is characterized in that,
When above-mentioned full frame live view display mode, decide above-mentioned contrast information according to the subject view data corresponding with whole pictures, when above-mentioned amplification live view display mode, decide above-mentioned contrast information according to the subject view data corresponding with above-mentioned specific region.
4. the camera of band amplifying display function according to claim 2 is characterized in that,
When having switched to above-mentioned amplification live view display mode, in carrying out the action of focal adjustments in above-mentioned the 2nd focusing permissible range, operated under the situation of release-push above-mentioned contrast AF unit, interrupt above-mentioned focal adjustments action.
5. the control method of a camera is characterized in that, this control method has following steps:
On shooting face, receive subject light beam, the shot object image of imaging on this shooting face is carried out opto-electronic conversion and exports the step of subject view data via phtographic lens incident;
Use above-mentioned subject view data, the amplification live view display mode that the full frame live view display mode that selection shows the almost Zone Full of photographic picture and the specific region of macrophotography picture show carries out the step that live view shows;
Obtain the contrast information in the up-to-date subject view data, and according to this contrast information, above-mentioned phtographic lens is guided to step in the focusing permissible range by contrast AF mode; And
When from above-mentioned full frame live view display mode when above-mentioned amplification live view display mode switches, carry out the step of moving linkedly with this switchings based on the focal adjustments of above-mentioned contrast AF mode,
In the above-mentioned step that by contrast AF mode above-mentioned phtographic lens is guided in the focusing permissible range, be accompanied by the beginning that above-mentioned amplification live view shows, above-mentioned phtographic lens guided in the focusing range according to the contrast information of the above-mentioned specific region that is exaggerated.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007233622A JP5203657B2 (en) | 2007-09-10 | 2007-09-10 | Camera with enlarged display function |
| JP2007233622 | 2007-09-10 | ||
| JP2007-233622 | 2007-09-10 |
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| Publication Number | Publication Date |
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| CN101388966A CN101388966A (en) | 2009-03-18 |
| CN101388966B true CN101388966B (en) | 2011-03-30 |
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| CN2008102151797A Expired - Fee Related CN101388966B (en) | 2007-09-10 | 2008-09-10 | Camera with amplifying display function and camera control method |
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| CN (1) | CN101388966B (en) |
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| JP5409278B2 (en) | 2009-11-06 | 2014-02-05 | オリンパスイメージング株式会社 | Image capturing apparatus and image capturing method |
| JP5657235B2 (en) * | 2009-11-10 | 2015-01-21 | オリンパスイメージング株式会社 | Image capturing apparatus and image capturing method |
| CN103037162A (en) * | 2012-10-25 | 2013-04-10 | 北京君正集成电路股份有限公司 | Zero time delay photographic system and zero time delay photographic method |
| CN104104787B (en) * | 2013-04-12 | 2016-12-28 | 上海果壳电子有限公司 | Photographic method, system and handheld device |
| CN104956655B (en) * | 2014-01-31 | 2018-06-22 | 奥林巴斯株式会社 | Photographic device |
| JP6529895B2 (en) * | 2015-11-19 | 2019-06-12 | 株式会社 日立産業制御ソリューションズ | Imaging apparatus and imaging method |
| WO2020000385A1 (en) * | 2018-06-29 | 2020-01-02 | 深圳市大疆创新科技有限公司 | Image display method and device, pan/tilt, and storage medium |
| JP7466304B2 (en) | 2019-04-04 | 2024-04-12 | キヤノン株式会社 | Imaging device, control method thereof, program, and storage medium |
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| JP2003338978A (en) * | 2002-05-21 | 2003-11-28 | Fuji Photo Film Co Ltd | Digital camera |
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| JP2009065582A (en) | 2009-03-26 |
| JP5203657B2 (en) | 2013-06-05 |
| CN101388966A (en) | 2009-03-18 |
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