CN1467559A

CN1467559A - Camera

Info

Publication number: CN1467559A
Application number: CNA031379990A
Authority: CN
Inventors: 中田康一
Original assignee: Olympus Optical Co Ltd
Current assignee: Olympus Corp
Priority date: 2002-06-04
Filing date: 2003-06-03
Publication date: 2004-01-14
Also published as: JP2004012637A

Abstract

A camera according to the present invention comprises a sensor array wherein multiple pixels are arrayed in the base-length direction, a focusing unit for performing focusing of the camera based on the image output from the sensor array, a first detection unit for detecting the movement of the image signals in the base-length direction, a second detection unit for detecting the change in a predetermined pixel signal of the image signals over time, and a movement detection unit for performing movement detection based on the output from the first and second detection units.

Description

Camera

Technical field

The hand wobble that the present invention relates to adopt hand wobble to prevent that the improvement of the camera that has the hand wobble measuring ability of technology, this hand wobble from preventing that technology from taking place when photographing by camera detects, and the cameraman is warned.

Background technology

Generally, when hand held camera is photographed, wait under the situation slowly,, tend to cause the photo failure if the camera in the exposure shakes in shutter speed.That is,, hand wobble causes the photo failure owing to having taken place.

Therefore, in order to prevent this hand wobble, just entered on various shake-proof technologies the camera from the past.

This shake-proof technology is categorized as the detection technique of camera body vibrations and two kinds of technology of countermeasure technology of vibrations that hope is detected usually.In addition, with the relevant technology of vibrations countermeasure further be categorized as with the vibrating state of camera body be notified to the user the warning technology, and the drive controlling phtographic lens wait the alignment technique that prevents to cause image degradation owing to hand wobble.

As the above-mentioned warning technology in the above-mentioned shake-proof technology, for example, the applicant opens the spy and has proposed in the 2001-33670 communique by display unit design being had the camera of very strong reply hand wobble ability.

In addition, open the example that also discloses the applications ranging sensor in 2001-165622 communique and the special public clear 62-27686 communique more early the spy.

Like this, photographed in the best condition with regard to adopting above-mentioned shake-proof technology to eliminate the influence of hand wobble as far as possible since the past, thereby obtained beautiful photo.

But when the existing camera of above-mentioned shake-proof technology had been adopted in use, what the general user who has do not understand was hand wobble and does not know to prevent the necessity of hand wobble and firmly push release-push, causes having taken the failure photo.Particularly locate at tourist site etc., when giving others and entrust others to carry out the release-push action in order to allow others help to control oneself to take pictures and with camera, owing to not too know how to operate, for example be shown in when controlling (holding) mobile cameras 10 significantly, and the situation that very difficult photo has been destroyed is a lot of as Fig. 6 (a).

In addition, according to the subject of obtaining by the one dimension linear sensor as data carry out hand wobble when judging as side-play amount, can easily detect the hand wobble of the orientation of linear sensor.But, for the hand wobble of the direction vertical with the orientation of linear sensor, since uncorrelated between the amount of hand wobble and the picture side-play amount, so there is the problem that is difficult to detect hand wobble.

Summary of the invention

Therefore, the present invention makes in view of the above problems, purpose provides a kind of camera that has the hand wobble measuring ability, it can be with the precision higher than the past, realize the hand wobble measuring ability with simple structure and low cost: use even do not note the user of hand wobble, can see also the inspection that detects hand wobble and show shows to control to take the few beautiful photo of hand wobble influence.

The camera that has the hand wobble measuring ability of a first aspect of the present invention uses the AF of the camera of the vibrating state that detects camera body to carry out hand wobble with sensor and detects, it is characterized in that: by the fixed time at interval relatively from above-mentioned AF with the subject of sensor output as data, carry out hand wobble when detecting as data as side-play amount according to this subject, according to above-mentioned subject as the picture side-play amount of data and above-mentioned subject as the absolute value of the difference of data and, judge whether it is hand wobble.

The camera that has the hand wobble measuring ability of a second aspect of the present invention is characterised in that: in the camera that has the hand wobble measuring ability of first aspect present invention, above-mentioned subject as the picture side-play amount of data and above-mentioned subject as the absolute value of the difference of data and at least one side during greater than separately appointment judgment value, be judged as hand wobble.

The camera that has the hand wobble measuring ability of a third aspect of the present invention is characterised in that: in the camera that has the hand wobble measuring ability of a first aspect of the present invention, above-mentioned subject is as the picture side-play amount of data during less than the judgment value of appointment, carry out according to above-mentioned subject as the absolute value of the difference of data and hand wobble judge.

The camera that has the hand wobble measuring ability of a fourth aspect of the present invention is characterised in that: in the present invention first to any one the camera that has the hand wobble measuring ability of the third aspect, when hand wobble detects, in the display unit that above-mentioned camera has, show hand wobble has taken place, give a warning to the user.

Description of drawings

Fig. 1 is the structural drawing of structure example of the camera that has the hand wobble measuring ability of the present invention's the 1st embodiment.

Fig. 2 is the electricity block structured block diagram that present embodiment is shown.

Fig. 3 is the key diagram of an example of the manufacturing process of acceleration IC.

Fig. 4 is the structural drawing that the concrete structure of acceleration IC is shown.

Fig. 5 is the block diagram that the structure example of the treatment circuit in the acceleration IC is shown.

Fig. 6 is the key diagram of the vibrations action the when hand wobble that camera takes place is described.

Fig. 7 is the performance plot that illustrates corresponding to the time-acceleration characteristic of the displacement of camera.

Fig. 8 is the key diagram that the shock detection of the camera of explanation present embodiment is moved.

Fig. 9 is the structural drawing that the structure of the display segment in the LCD of camera is shown.

Figure 10 is the stereographic map of seeing from the rear side of the camera of the state of warning display part flicker.

Figure 11 is the stereographic map of seeing with the face side of the camera of the state of LED flicker from self-timer.

Figure 12 illustrates the process flow diagram of being carried out by the CPU of camera as the demonstration control action example of feature.

Figure 13 is the figure that an example of the on-warning mode (pattern) that LCD shows in the view finder is shown.

Figure 14 is the figure of the demonstration example of LCD in the view finder that illustrates when hand wobble does not take place.

Figure 15 is the figure that a demonstration example of the hand wobble warning that shows among the LCD in the view finder is shown.

Figure 16 is explanation generates processing as the difference data of the feature of present embodiment a key diagram.

Figure 17 is the figure that is used to illustrate above-mentioned calculation process, is the key diagram of the window shifts method of explanation related operation.

Figure 18 is the related data figure that the correlation of each shift value of representing Figure 17 is shown.

Figure 19 illustrates by what the CPU of the camera of the 2nd embodiment carried out and detects the process flow diagram of control example as the hand wobble of feature.

Embodiment

Below, with reference to figure, embodiments of the present invention are described.

The 1st embodiment

The camera that has the hand wobble measuring ability of embodiments of the present invention possesses: the liquid crystal display component that the camera coverage (the view finder visual field) by the photograph mode decision that is provided with in the view finder of transmitance variation to camera by light shows; Judge except above-mentioned distance measuring sensor, also to have and detect the vibrations of camera and the shock detection parts that hand wobble has taken place in expression with monolithic (monolithic) accelerometer as hand wobble.And adopt following technology: when hand wobble had taken place, the transmitance of viewing area that makes liquid crystal display component made the user learn the generation of hand wobble easily by patterns of change.

Above-mentioned monolithic accelerometer is the IC shaped like chips, utilize movable figure and can not cardon shape between the capacitance variations that produces detect the device of vibration, in the present invention, for example can use the spy to drive the accelerometer that flat 8-178954 communique etc. proposes.Its structure is: two kinds of figures all are formed on the silicon circuit board by the polysilicon member, can move and response acceleration, state that another electrode is static with respect to acceleration with one of them electrode, form a pair of capacitor.When applying acceleration on such silicon circuit board, the electric capacity of one of them capacitor increases, and the electric capacity of another capacitor reduces.The signal processing circuit that this differential capacitor is converted to voltage signal must be arranged, and these movable electrodes, capacitor and signal processing circuit all are formed in the monolithic on the same circuit board.

In addition, stated the application technology of safety feature work such as the control system that is used to make automobile and air bag in the Te Kaiping 8-178954 communique, to being illustrated by the advantage of singualtion at aspects such as size, cost, required electric power, reliabilities, but, the present invention disposes and controls these devices effectively, when keeping above-mentioned characteristic, increase the distinctive situation of camera, with the effective shockproof camera of done with high accuracy.This part can constitute with the shock sensor that detects bump etc.

The structure example of the camera that has the hand wobble measuring ability of the present invention's the 1st embodiment has been shown among Fig. 1 and Fig. 2.Fig. 1 (a) shows the surface structure of the camera that has the hand wobble measuring ability of present embodiment, be to disconnect a part and the structural perspective that shows inner structure, Fig. 1 (b) shows the structural drawing of the configuration relation of the hard printed circuit board that adopts in the camera of present embodiment and flexible print wiring board (hereinafter referred to as flexible electric circuit board), and Fig. 1 (c) shows the key diagram of range-finding optical system of the camera of present embodiment.Fig. 2 shows the electricity block structured block diagram of the camera of present embodiment.

Shown in Fig. 1 (a), the camera 10 of present embodiment mainly is made of camera body 10A, on the front surface of this camera body 10A, except phtographic lens 9 and flashlamp 8, that has also disposed range finding portion that view finder object lens 15 and automatic focus uses is subjected to light microscopic first-class.The inside of this camera body 10A is provided with the circuit group that is used for this camera 10 of full automatic working.Also comprise the above-mentioned monolithic accelerometer of installing on the hard printed circuit board 14 (acceleration IC) 3 in this circuit group, for the position relation is shown, Fig. 1 (a) disconnects a part, makes to see a part of inner structure.

In addition, on the hard printed circuit board 14 except acceleration IC3, also installed as the single chip microcomputer (CPU) 1 of the control assembly of the action relevant that is used to control camera integral body and the interface IC (IFIC) 2 that makes actuator work such as motor and mechanical mechanism portion is driven with photography.In addition, CPU1 nearby be provided with storer 4, EEPROM for example, this storer 4 is used for the adjustment data in camera assembling procedure memory unit deviation.

Fig. 1 (b) illustrates side direction and sees under the state of camera, the structural drawing of the relation of hard printed circuit board 14 and flexible electric circuit board 7.Shown in Fig. 1 (b), because hard printed circuit board 14 can not connect so use flexible electric circuit board 7 and pass through connector 12 along the curved surface bending of camera inside.

This has installed display device (LCD) 6 (with reference to Fig. 1 (a)) above flexible electric circuit board 7, form the circuit and the switch figure 13 of communicating by letter with sensor unit 5 with automatic focus (AF).This flexible electric circuit board 7 is always around the back side to photograph main body 10A, pronunciation device PCV and LED untill further notice device have been installed in the warning display part 11 shown in Fig. 1 (b), except will conveying to warning display part 11 from the signal of CPU1 output, also the sensor array 5c that uses with AF carries out the exchange of signal.

This AF sensor unit 5 shown in Fig. 1 (c) uses the principle of range of triangle to ask the distance of subject 101, the image signal 102 of subject 101 is detected by light microscopic head 5d and sensor array 5c by two, X can detect the subject distance according to its relative position difference.

In this case, subject generally has shadow longitudinally, thus these two be subjected to light microscopic head 5d shown in Fig. 1 (a), laterally (directions X) configuration, sensor array 5c also is a horizontal partition.By such configuration mode, if hand wobble is arranged in the horizontal, the kine bias that then can detect the directions X that is produced is moved.

Therefore, shown in Fig. 2 (b), acceleration IC3 is configured to detect the direction of rocking of Y direction rather than directions X, makes the detection of X, Y both direction replenish mutually by different sensors.

Here, with reference to Fig. 3 and Fig. 4, the concrete structure of acceleration IC3 is elaborated.

Fig. 3 is the key diagram of an example that the manufacturing process of above-mentioned acceleration IC3 is shown, and Fig. 3 (a)～Fig. 3 (e) is corresponding to the order (the 1st～the 5th operation) of this manufacturing process.In addition, Fig. 4 illustrates the concrete structure of this acceleration IC3, Fig. 4 (a) is the structural drawing that illustrates on the silicon circuit board, Fig. 4 (b) is the structural perspective that the silicon circuit board that comprises movable electrode, cradle portion (wrist) is shown, and Fig. 4 (c) is the structural drawing that the IC structure that comprises the treatment circuit that forms on the silicon circuit board is shown.

At first, on silicon circuit board (IC chip) 20, form oxide film 21 (with reference to Fig. 3 (a), Fig. 3 (b)), on this oxide film 21, form the figure that constitutes by Etching mask, the part that to expose is removed with etching method, after removing Etching mask, can form peristome (with reference to Fig. 3 (c)) at arbitrary portion.

Afterwards, in these surface sediment polysilicon layer 22 backs (with reference to Fig. 3 (d)), after the use wet etching was optionally removed oxide film 21, polysilicon layer 22 was formed on (with reference to Fig. 3 (e)) on the silicon circuit board 20 with the structure of bridge shape.On this polysilicon layer, carry out the diffusion of impurity such as phosphorus, make it have electric conductivity.By the form of such bridge construction, just can on silicon circuit board 20, form the movable electrode 22 that there is column sections at 4 angles shown in Fig. 4 (b).

In addition, on silicon circuit board 20, shown in Fig. 4 (a), form other electrode 24,25, by cradle portion 23a, the 23b disposed adjacent that makes electrode 24,25 and above-mentioned movable electrode 22, forming small condenser capacitance between cradle portion 23a and the electrode 24, between cradle portion 23b and the electrode 25.And then, shown in Fig. 4 (c), on silicon circuit board 20,, can constitute the IC of the treatment circuit that has the acceleration that can judge assigned direction with monolithic by making the IC chip that disposes this movable electrode structure.

That is, shown in Fig. 4 (c), when forming the movable electrode capacitor that constitutes with above-mentioned monolithic on this chip, be used in sheet (on chip) and form treatment circuit 29.It detects the capacitive part that changes with movable electrode 22, and output is corresponding to the signal of acceleration.Because along with moving of bridge shape movable electrode 22, one of them increase of the electric capacity that forms by above-mentioned two electrodes, another minimizing is so can detect the acceleration of the direction of arrow of Fig. 4 (b).

Therefore, the IC chip of this spline structure is installed in camera, just can be judged the acceleration of the Y direction shown in Fig. 2 (b).

Fig. 5 (a) illustrates the block diagram of the structure example of above-mentioned treatment circuit 29.

The acceleration transducer 31 that moves that is used for detecting the Y direction in above-mentioned formation forms capacitive component respectively between cradle portion 23a, 23b and electrode 24 and electrode 25.And along with moving of cradle portion 23a, 23b, these electric capacity change.By treatment circuit 29 this capacitance variations is converted to electric signal.

Shown in Fig. 5 (a), this treatment circuit 29 is made of following part: vibration produce the carrier wave of pulse waveform carrier generator (oscillatory circuit) 32, by each waveform that the capacitance variations along with acceleration transducer 31 is changed carry out the all-wave switching and rectifying carry out the interdependent simulating signal of demodulator circuit 34, the output acceleration of demodulation filtering circuit 36, simulate-the pwm signal generation circuit 37 of PWM conversion.

Fig. 5 (b) illustrates the output waveform of above-mentioned treatment circuit 29.As shown in the drawing, the output of treatment circuit 29 is along with the variation of acceleration, and duty of ratio (ratio of T1 and T2) changes.

Acceleration IC3 shown in Fig. 2 (b) has the acceleration transducer and the treatment circuit of said structure.Therefore, this acceleration IC3 output and the proportional voltage signal of acceleration or with the proportional pulse-length modulation of acceleration (PWM) signal.If the CPU1 of processing digital signal uses built-in counter that pwm signal is carried out demodulation, just can sense acceleration.With the proportional voltage signal of acceleration as long as use adjustment machine with A/D converter etc.In addition, if use the PMW signal, just A/D converter need be installed in CPU1.

Fig. 2 (a) illustrates the frame circuit diagram of the camera that such acceleration IC3 has been installed, and with reference to this figure primary structure is partly described.

Shown in Fig. 2 (a), the circuit structure of the camera 10 of present embodiment is by constituting with the lower part: the CPU1 of control camera integral body; IFIC2; Acceleration IC (monolithic accelerometer) 3; Storage is adjusted with memory of data (EEPROM) 4; Automatic focus (AF) 5a of portion; Photometric measurer 5b; Be used to show that the set condition of camera reaches the liquid crystal display device (LCD) 6 of the information relevant with photography; LCD6a in the view finder of the information of be arranged in the view finder, demonstration is relevant with photography; The flashlamp portion 8 that comprises the luminotron that sends fill-in light etc.; To the main capacitor 8a that is used to the luminous electric charge of luminotron is charged; Phtographic lens 9 with zoom function; The warning display part 11 that comprises LED; The resistance 11a that connects with warning display part 11; Be used to start switch 13a, the 13b of the cine sequence of camera; Phtographic lens 9; Shutter 19; Be used to drive the motor 18 of the driving mechanism that transmits film etc.; With the rotating vane 16 of motor 18 interlock rotation, the photo interrupter 17 that optical detection carried out in the hole of the rotating vane 16 of rotation for the drive controlling of carrying out motor 18.

In addition, when motor 18 drives each driving mechanism of phtographic lens 9 and shutter 19 etc., both can switch driven object, also can in each driving mechanism, equip motor separately by not shown switching mechanism.

In such structure, CPU1 carries out and controls the cine sequence of camera 10 according to the mode of operation of switch 13a, 13b.Promptly, output according to acceleration IC3, except warning the demonstration by LCD6a in the view finder of hand wobble warning usefulness, the light measuring circuit 5b of the 5a of range finding portion that also automatic focus is used when photography, the brightness of mensuration subject in order to expose control drives, accept necessary signal, by above-mentioned IFIC2 drive control motor 18.

At this moment, rotating vane 16 is passed in the rotation of motor 18, and then, according to the hole that has or not rotating vane 16, IFIC2 carries out wave shaping and offers CPU1 the signal of photo interrupter 17 output, accept this signal after, the rotation status of CPU1 monitoring motor 18.In addition, CPU1 carries out the luminous of the fill-in light that undertaken by flashlamp 8 as required.

Figure 13 is the example that the on-warning mode that shows among the LCD6a in the view finder is shown, and symbol A illustrates the picture A of A pattern, and symbol B illustrates the picture B of B pattern, and symbol C illustrates the picture C of C pattern.

The picture that the shading demonstration that picture when LCD6a diverts panning mode in the view finder shows and the expression shutter closes etc. is used shows.

A shown in Figure 13, C pattern use full shot to set shown shading pattern, be repeated below operation in order: at first, shown in picture A, only upper area is carried out shading, then, shown in picture B, the middle section of the camera coverage during only to the expression full shot carries out shading, and last, only the lower area to the panorama lightproof area carries out shading shown in picture C.By repeating this display format, the user who observes view finder is learnt hand wobble has taken place.In addition, carry out shading simultaneously, can carry out above-mentioned shading and show by pattern to this A, B, C.

Owing to can show the sensation that the view finder picture rocks by such demonstration; so the user controls camera 10 again hand is not rocked; just can turn back to the picture E shown in the screen D shown in Figure 14 (a) or Figure 14 (b), carry out subject and monitor according to common or panning mode.

In addition, Figure 15 is the figure that the demonstration example (pattern 1) that the shown hand wobble of LCD6a is warned in the view finder is shown.

As shown in figure 15, this pattern 1 is same with pattern illustrated in fig. 13, has utilized full shot to set shown shading light part.It is the pattern that shading light part alternately shows as picture A, picture C about will being somebody's turn to do.This figure is different with the on-warning mode on Figure 13, and the picture central portion always can be seen, so during panorama photographic mode, the expression that subject can not occur does not see the situation of Chu.In addition, owing to glimmer, so different with the common demonstration among Figure 14 (a), Figure 14 (b), the user can not misunderstand, and positively use warning to show hand wobble is notified to the user.

Below, with reference to Fig. 6 to Figure 11, the shock detection principle of the camera of this structure is specifically described.

Fig. 6 is the key diagram of hand wobble that the explanation camera the is shown vibrations action when taking place, and Fig. 6 (a) is the figure of the state when the user being shown controlling camera, and Fig. 6 (b) is the figure that the shock detection direction of camera is shown.Fig. 7 is the performance plot that illustrates corresponding to the time-acceleration characteristic of the displacement of camera, and Fig. 7 (a) is the big situation of amount of movement that camera is shown, and Fig. 7 (b) is the little situation of amount of movement that camera is shown.In addition, Fig. 8 is the key diagram that the shock detection action of the camera that present embodiment is described is shown, and Fig. 8 (a) is the key diagram that its operation steps is shown respectively and shows example to Fig. 8 (d).And Fig. 9 is the structural drawing that the structure of the display segment in the LCD of this camera is shown.Figure 10 and Figure 11 are the outside drawings that the warning show state of this camera is shown, Figure 10 illustrates the stereographic map of seeing from the rear side of the camera of warning display part 11 blink states, and Figure 11 illustrates the stereographic map of seeing with the face side of the camera of LED blink states from self-timer.

Suppose that present user uses camera to photograph.At this moment, can consider that also shown in Fig. 6 (a) user's 100 one hands control the situation of camera 10, in this case, camera has the tendency of oblique small vibrations.That is, this small vibrations of camera 10 can be decomposed into moving of directions X and Y direction shown in Fig. 6 (b).

General user often not can be appreciated that so small vibrations can cause the effect of " rocking " when photography.Corresponding therewith, in the camera 10 of present embodiment, this camera 10 detects these small vibrations and by carrying out demonstration illustrated in fig. 13, and the situation occurred of hand wobble is notified to the user.The hand wobble notice that user 100 response cameras 10 send, the user can adopt the method that left hand 100a also is used to control vibration-inhibitions such as camera to photograph, and does not photograph so can there be the photo of the failure that hand wobble causes.

But it is pretty troublesome always to provide warning, takes notice of that very the more glad hand wobble that effectively utilizes of advanced level user of hand wobble carries out the photo photography, so, improve in the present embodiment, make this is controlled audit function as one of photograph mode, only think just to be provided with in case of necessity the user.Promptly, switch 13c and liquid crystal display part 6 shown in Fig. 8 (a) are set, in the normal state, only enable functions such as film counter 6a, only when the user for example uses left hand 100a like operator scheme change-over switch 13c shown in Fig. 8 (b), just carry out the setting of hand wobble pattern.When being set at this pattern, show display segment 6b, 6c part shown in Fig. 8 (b), Fig. 8 (c), during display segment 6b flicker, the user can learn to have entered and control checking mode.

In addition, in the present embodiment, shown in Fig. 8 (d), this pattern shows the part that dual-purpose self-timer pattern shows, so, can the layout in the liquid crystal display part (LCD) 6 not increased burden.In addition, as shown in Figure 9, each display segment 6b, 6c of this section in liquid crystal display part 6 with separately independently mode connect up, so, can carry out independent displaying control by CPU1.

Be set at this pattern, hand held camera 10, if the gripping state instability, then camera 10 is warned user 100 by making in the view finder LCD6a flicker as mentioned above.In addition, the LED11 flicker on view finder eyepiece portion 61 next doors of camera 10 is warned.

In this case, the outward appearance of seeing camera 10 from the front also can make self-timer show the flicker with LED65 as shown in figure 11, and the owner of camera 10 can check cameraman's the situation of controlling when the through committing others photographs.

Below, with reference to Fig. 7, to the different specific descriptions of carrying out as output (image signal) with the output of acceleration transducer of the AF sensor of feature of the present invention.

Now, for example because the controlling of 100 pairs of cameras 10 of user, shown in Fig. 6 (a), Fig. 6 (b), camera 10 self has taken place to have X, the hand wobble that moves of Y both direction component.

At this moment, in the camera 10 of present embodiment, shown in Fig. 7 (a), in the moment t=t1 timing that camera 10 moves, the signal that acceleration IC (acceleration transducer) 3 output cameras 10 begin to move.But, afterwards, if with the constant speed activity, although then camera is rocking, owing to be not acceleration, so acceleration IC3 output signal not.When camera stopped once more, at t=t7 regularly, current acceleration IC3 output made the acceleration signal of the direction that previous uniform motion stops.

The image-position sensor of camera (AF sensor) output also continues the image signal of variation in uniform motion, to compensate the acceleration transducer of this acceleration IC and so on, if so judge this output, even acceleration IC3 is output as 0, the CPU1 of camera 10 also can judge this camera 10 and move.

In addition, shown in Fig. 7 (b), even image signal changes hardly, acceleration transducer also has output.This is because under user 100 state that attempt fixed camera 10 keeps in vibrations, different with the state shown in Fig. 7 (a), as variation little, in fact, even in most cases photograph like this, some focal length also can be taken no problem photo.That is, the big output of existing acceleration transducer output, and camera 10 has only the situation of minute movement, also has the acceleration transducer reaction very little, and the situation that position of camera alters a great deal.

In addition, rock judgement by the AF sensor several restrictions are also arranged.For example, in the scene that does not have contrast and dark and can't differentiate in the scene of picture, owing to can't understand the variation of picture, so can't judge.In addition, shown in the present embodiment example, use have only a detection side to sensor can't learn camera 10 with this direction different directions move and picture changes, when camera 10 acutely rocks, the position of AF sensor monitoring falls through, picture takes place to change fully, can't correctly judge the rolling momentum.

Therefore, need work hard these 2 sensors are suitably distinguished to make and be used for judging and rock.What the camera of present embodiment had a sensor that these two kinds of detection modes have been installed controls the checking mode function.

With reference to process flow diagram shown in Figure 12, the CPU1 that such having is controlled in the camera of checking mode function is elaborated according to the demonstration control of carrying out according to the sequence of plug-in etc.

For example, in the camera 10 as shown in figure 11, when opening the lens cap 10a of the camera lens of protecting the front, the user at first selects scape, does not also enter the action of controlling.Therefore, under this state, owing to camera 10 is moved significantly, so the judgement of AF sensor is invalid.Because the AF sensor only monitors the narrow part in the picture, so, can not carry out quantitative evaluation fully for significantly the moving of camera.

Therefore, CPU1 in the camera 10 is according to the judgment processing of step S1, at first judge the output of acceleration IC3, the vibrations when vibrations when even lens cap is opened in existence and user control camera, control the demonstration of warning in also forbidding at the appointed time according to the processing of following step S2, afterwards, in the processing of step S3, use the AF sensor to look like to detect.By this processing, can judge whether the picture detection is fit to control inspection, so, CPU1 judges that according to following step S4 detecting similarly is low-light level, perhaps judge when being low contrast, processing is moved to step S10 so that do not use image signal and start the flow process of rocking judgement according to acceleration transducer according to step S5.This flow process is when acceleration transducer has been exported signal, and when at the appointed time not detecting the reciprocal acceleration of output (step S11～step S12), (step S13) gives a warning.That is, shown in Fig. 7 (a), judge camera, the user is learnt hand wobble may take place at persistent movement at the uniform velocity.

But, continue to carry out under the state of uniform motion at camera 10, the user may want to carry out motion photography, so, for example, can not carry out the flicker (Figure 13 etc.) of the LCD in the view finder, and only make the LED11 flicker view finder eyepiece near as shown in figure 10, carry out (step S27) different warning under the situation with usefulness AF sensor also.

In addition, when image signal is fit to the hand wobble judgement, CPU1 is in the later flow process of step S20, repeat picture by fixed time interval (step S22) and detect (step S21, step S24), according to as the absolute value of the difference of side-play amount and image signal and carry out hand wobble and detect (about the detailed process of step S25, describe later on), judge that by the judgment processing of following step S26 the result who detects rocks sign (f_bure) and whether is set up.That is, CPU1 judges by this judgment processing whether rock sign (f_bure) is " 1 ", be judged as and be provided with when rocking sign (f_bure) (" 1 "), processing is moved to step S27, in this is handled, show that control is so that control inadequate warning.

According to these warnings, the user can learn the own unconscious hand wobble that causes, takes to hold or be placed on what first-class countermeasure that prevents hand wobble with two handgrips.

In addition, CPU1 judges whether to be provided with composition change sign (f_change) by the judgment processing of following step S28.Promptly, CPU1 is by this judgment processing, judge whether composition change sign (f_change) is " 1 ", the result who rocks detection of above-mentioned steps S25 for as the absolute value of the difference of side-play amount or image signal and be judged as when being provided with composition change sign (f_change) (" 1 ") greater than the common determined level of rocking, think that the user has taked diverse angle or changed composition, so, processing is turned back to above-mentioned steps S1.

In addition, the judgment processing by above-mentioned steps S28 is judged as under the situation that composition change sign (f_change) (" 0 ") is not set, and CPU1 turns back to above-mentioned steps S22 with processing.

On the other hand, judgment processing by above-mentioned steps S27 is judged as and is not provided with when not rocking sign (f_bure) (" 0 "), owing to be the stable situation of image signal, so can carry out releasing operation, CPU1 judges pushing of release-push in the judgment processing of step S29.In step S29, be judged as release-push when being pressed, carry out the later exposure sequence of following step S30, be judged as when not pushing, processing is turned back to above-mentioned steps S22.

When release-push was pressed, CPU1 at first passed through the processing of step S30 and step S31, the range finding of adjusting focal length and being used to focus.By the processing of following step S32, detect the monochrome information decision obtain in the time of the time shutter according to the picture of above-mentioned steps S3, begin exposure.

During this period,, camera can become hand wobble if rocking, so CPU1 carries out acceleration detection by the processing of following step S33, and the acceleration g that vibrations when asking for release-push and pushing etc. cause.That is,, also become the hand wobble photo,, also can become the hand wobble photo when growing in the time shutter even g is little even the time shutter lacks if this g is big.In order to carry out this judgement, CPU1 counts the time shutter by the judgment processing of following step S34.Then, when judging end exposure,, obtain speed according to g that tries to achieve and time shutter tEND by the processing of following step S36 by step S35, according to this velocity variations the tEnd time, can calculate amount of movement.Therefore, if this amount of movement surpass this camera lens rock allowance Δ Y, show then that control makes to warn by the processing of following step S37.In addition, if amount of movement does not surpass allowed band Δ Y, then end process.

As mentioned above, only can only understand the variation of speed, still by acceleration, in the present embodiment, at first, do not change according to the output (image signal) of AF sensor and to judge and stop at assigned address, so, can as benchmark correctly judged in the exposure camera movement what.

Below, with reference to Figure 16, be elaborated to detecting to handle according to rocking of above-mentioned steps S25.Figure 16 illustrates the process flow diagram that detects the subroutine of handling that rocks that is used to carry out above-mentioned steps S25.

In the camera 10 of present embodiment, when CPU1 carries out the processing of above-mentioned steps S25, start the subroutine that hand wobble as shown in figure 16 detects.That is, the processing of CPU1 execution in step S101 by this processing, empties (" 0 ") to rocking sign (f_bure) and composition change sign (f_change), and processing is moved to step S102.

In the processing of step S102, CPU1 moves to processing step S103 afterwards by the picture offset X of detection last time picture data D (n-1) that detects and the picture data D (n) that detect specifically such as related operation processing described later.

In the processing of step S103, CPU1 detect the picture data D (n-1) that detected last time and the difference of the picture data D (n) of current detection absolute value and Y.At this moment, suppose D (n-1)=a1, a2 ... an, D (n)=b1, b2 ... bn, then

Formula 1

Y = Σ_{i = 1}^{n} | a_{i} - b_{i} | - - - (1)

Here, a1, a2 ... an is the output when detecting last time of constituting each sensitive device of sensor array 5c.And a1, a2 ... the aggregate of an is the picture data D (n-1) of last time.B1, b2 ... bn too be output when constituting current detection of each sensitive device of sensor array 5c.And b1, b2 ... the aggregate of bn is current picture data D (n).That is, above-mentioned formula (1) obtain the output of last time of same sensitive device and current output difference absolute value and.Use such formula (1) detect as the absolute value of data difference and Y.Thereby can detect the variation of picture data that detected last time and the picture data that detect specifically.That is, when camera vertically rocks, because the variation of the monitoring range of AF sensor unit 5, so, as the shape variation of data itself.And when changing by this way as data shape itself, the absolute value of the difference of above-mentioned picture data become big with Y.Therefore, if the absolute value of the difference of picture data is big with Y, then can be judged as camera and have taken place to rock longitudinally.

Afterwards, processing is moved to the judgment processing of step S104.

Then, the judgment processing of CPU1 by step S104 to as offset X with rock judgment value Xb and compare, be judged as offset X when rocking judgment value Xb, move to step S105, otherwise, be judged as greater than the time, processing is moved to step S106.

In the judgment processing of step S105, CPU1 to the absolute value of picture data D (n-1) and the difference of picture data D (n) with Y with rock judgment value Yb and compare, be judged as absolute value with Y when rocking judgment value Yb, move to step S106, otherwise, be judged as less than the time, finish to rock to detect and return.

In step S106, CPU1 is provided with and rocks sign (f_bure), that is, will rock sign (f_bure) and be set to " 1 ", afterwards processing is moved to step S107.

Then, CPU1 is by the judgment processing of step S107, to comparing as offset X and composition change judgment value Xch, when being judged as the picture offset X, move to step S108 less than composition change judgment value Xch, otherwise, be judged as greater than the time, processing is moved to step S109.

In the judgment processing of step S108, CPU1 compares with Y and composition change judgment value Ych the absolute value of picture data D (n-1) and the difference of picture data D (n), be judged as absolute value with Y during greater than composition change judgment value Ych, move to step S109, otherwise, be judged as less than the time, finish to rock to detect and return.

Then, CPU1 is provided with composition change sign (f_change) by the processing of step S109.That is, composition change sign (f_change) is set to " 1 ", afterwards, finishes to rock and detect and return, processing is moved to as shown in figure 12 step S26.

Below, with reference to Figure 17 and Figure 18, be elaborated to handling according to the related operation of the above-mentioned steps S102 among Figure 16.

Figure 17 and Figure 18 are the key diagrams that is used to illustrate above-mentioned calculation process, and Figure 17 is the window shifts method of explanation related operation, and Figure 18 is the related data figure that the correlation of each shift value of expression is shown respectively.In addition, in Figure 17 (a), Figure 17 (b), symbol 5ca, 5cb represent and will be carried out opto-electronic conversion and converted to the sensor array (AF sensor) of electric signal by corresponding its light intensity of the subject picture that is subjected to the imaging of light microscopic head, and symbol 120a, 120b represent the extraction scope (being also referred to as window) of the sensing data that uses in the correlative computing.In addition, in Figure 18, Fmin represents minimum correlation, and nFmin represents correlation displacement hour.

In the present embodiment, the related operation of above-mentioned steps S102 (with reference to Figure 16) is handled, and shown in Figure 17 (a), Figure 17 (b), uses sensor array 5ca, 5cb to carry out.

And sensor array 5ca represents the sensor array 5c of the timing of last time, and sensor array 5cb represents the sensor array 5c of current timing.Adopted different symbols in order to describe, but both are same sensor arraies.

These AF sensors 5ca, 5cb as shown in the figure, are made of a plurality of electrooptical devices (sensitive device).And, from image signal a1, the a2 of the output of each electrooptical device ... aN, b1, b2 ... bN is stored in two zones of the not shown memory unit in the CPU1 respectively (when hand wobble detects, as mentioned above, the a1, the a2 that obtain of memory gap fixed time difference ... aN).

In addition, above-mentioned image signal a1, a2 ... aN represents the output signal of the last time of each electrooptical device regularly, image signal b1, b2 ... bN represents the output signal of current each electrooptical device regularly.

CPU1 extracts the data of specified scope (hereinafter referred to as window) 120a, 120b out according to this image signal.As the extraction method of this moment, the simplest method is that window 120a is fixed, 1 sensor of the each displacement of window 120b1.This is an example, and present embodiment is not limited thereto, for example, also can be when when range finding and hand wobble detect the data number, displacement, displacement method etc. of change window.

Then, CPU1 uses the data of the pair of windows of extracting out, asks correlative F (n) by following formula (2).At this moment, in formula (2), suppose that n is a displacement, w is a data number in the window, and i is data No in the window, and k is the initial sensing data No in computing zone, then

Formula 2

F_{(n)} = Σ_{i = 0}^{w - 1} | a_{k + i} - b_{k + i + n} |

Like this, what the consistent degree of the data of pair of windows 120a, 120b was the highest is that (during F (n)=Fmin), displacement n=nFmin is the relative picture offset X (n) of subject picture to F (n) minimum of as shown in figure 18 1 sensor of the each displacement of window 120b being tried to achieve.

That is, by such computing, in the timing of last time and current timing, can be in the hope of the amount of movement of the picture data in the orientation of the electrooptical device that constitutes sensor array 5c.Then, according to this amount of movement, can detect rocking of camera in the electrooptical device orientation (transverse direction of camera).

Like this, ask picture offset X (n), later on as mentioned above, control to compare judgement with specified level Xc, Xcc.

Therefore, as mentioned above,, applied flexibly the sensor that AF uses effectively,, also be used to control inspection, can improve the surcharge of camera so just the AF sensor is not used for finding range according to present embodiment.

In addition, and, detect rocking of directions X, Y direction with the signal of acceleration transducer, not only can tackle dark scene and low contrast scene, and, can correctly calculate the amount of movement of camera according to the output of acceleration transducer by using as the static detection sensor.

And then, used rocking in the detection of sensor that AF uses, not only with the side-play amount of subject, but also with the absolute value of image signal difference and use and rock in the judgement, so, even have only the AF sensor, also can detect the hand wobble of directions X (transverse direction of camera), Y direction (longitudinal direction of camera).

Thereby, the shutter speed in the time of can be according to the focal length of phtographic lens and aperture, photography, the hand wobble that carries out after the correct photography is judged.

In addition, if the position of proofreading and correct phtographic lens according to the amount of movement that calculated can be applied in the camera that has shockproof function certainly.

The 2nd embodiment

Figure 19 illustrates the 2nd embodiment that has the camera of hand wobble measuring ability of the present invention, and the process flow diagram that rocks an example that detects control as feature by the CPU execution of this camera is shown.

Present embodiment is characterised in that, with respect to use in above-mentioned the 1st embodiment as the absolute value of side-play amount and image signal difference with rock detection, present embodiment is carried out control and treatment, only make the absolute value that just uses the image signal difference as side-play amount when rocking judgment value and rock detection.

In the camera 10 of present embodiment, the rocking of above-mentioned steps S25 that CPU1 carries out as shown in figure 12 detected when handling, and starts the subroutine that hand wobble as shown in figure 19 detects.That is, the processing of CPU1 execution in step S201 by this processing, empties (" 0 ") to rocking sign (f_bure) and composition change sign (f_change), and processing is moved to step S202.

In the processing of step S202, CPU1 is by the related operation processing identical with above-mentioned the 1st embodiment etc., detects the picture offset X of the picture data D (n-1) that detected last time and the picture data D (n) of current detection, afterwards processing moved to step S203.

In the judgment processing of step S203, CPU1 to as offset X with rock judgment value Xb and compare, be judged as offset X when rocking judgment value Xb, move to step S204, otherwise, be judged as greater than the time, processing is moved to step S207.

In the judgment processing of step S204, CPU1 uses and the same above-mentioned formula (1) of above-mentioned the 1st embodiment, detect the picture data D (n-1) that detected last time and the difference of the picture data D (n) of current detection absolute value and Y, afterwards, processing is moved to the judgment processing of step S205.

In the judgment processing of step S205, CPU1 to the absolute value of picture data D (n-1) and the difference of picture data D (n) with Y with rock judgment value Yb and compare.Then, be judged as absolute value with Y when rocking judgment value Yb, move to step S206, otherwise, be judged as less than the time, finish to rock to detect and return.

In the judgment processing of step S206, CPU1 compares with Y and composition change judgment value Ych the absolute value of picture data D (n-1) and the difference of picture data D (n), be judged as absolute value with Y during less than composition change judgment value Ych, move to step S207, otherwise, be judged as greater than the time, move to step S209.

In the processing of step S207, CPU1 is provided with and rocks sign (f_bure), that is, will rock sign (f_bure) and be set to " 1 ", afterwards processing is moved to step S208.

Then, the judgment processing of CPU1 by step S208 to comparing with composition change judgment value Xch as offset X, is judged as the picture offset X when changing judgment value Xch greater than composition, moves to step S209, otherwise, be judged as less than the time, detection of end is returned.

Then, CPU1 is provided with composition change sign (f_change) by the processing of step S209.That is, composition change sign (f_change) is set to " 1 ", afterwards, finishes to rock to detect and return, equally processing is moved to as shown in figure 12 step S26 with above-mentioned the 1st embodiment.

Therefore, as mentioned above,, only make and just to use the absolute value of image signal difference to rock detection using can't rock when detecting as side-play amount owing to control according to present embodiment, so, common rocking detection time can be shortened.Other effect is identical with above-mentioned the 1st embodiment.

In addition, the present invention is not limited only to above-mentioned the 1st, the 2nd embodiment, and the combination of each embodiment and application also are applicable to the present invention.

To sum up explanation according to the present invention, in taking notice of the photography scene of hand wobble especially, is controlled checking mode if be provided with, and will give a warning when hand wobble, makes the cameraman learn hand wobble, so can there not be the photo photography of the failure that hand wobble causes.And, control when judging, the sensor that the sensor as existing range finding usefulness can be used uses effectively in hand wobble is judged, so, the camera that has the hand wobble measuring ability that does not raise the cost and can carry out the hand wobble judgement of high reliability can be provided.

Claims

1. a camera has the hand wobble measuring ability, it is characterized in that possessing:

Sensor array, it is arranging a plurality of sensitive devices, is used to export subject that the output signal by each sensitive device constitutes as data,

The 1st calculating part, its calculate the 1st regularly be different from the 1st regularly the 2nd regularly described subject as the picture side-play amount of data,

The 2nd calculating part, its calculate the described the 1st regularly with the 2nd regularly each sensitive device output signal difference absolute value and,

The hand wobble judging part, its according to described the 1st calculating part and or the output of described the 2nd calculating part, judge whether it is hand wobble.

2. camera as claimed in claim 1 is characterized in that:

When at least one in the output of the output of described the 1st calculating part and the 2nd calculating part of described hand wobble judging part is bigger than separately appointment judgment value, be judged as hand wobble.

3. camera as claimed in claim 1 is characterized in that:

Described hand wobble judging part, carries out hand wobble according to the output of described the 2nd calculating part and judges during less than the judgment value of appointment in the output of described the 1st calculating part.

4. camera as claimed in claim 1 is characterized in that:

Also have display unit,

When being hand wobble, in described display unit, showing hand wobble has taken place by described hand wobble judgement section judges.

5. camera as claimed in claim 1 is characterized in that:

Also have the sensor that is used to carry out the hand wobble detection,

When the subject of described sensor array output is low contrast as data, use the output of described sensor to judge whether it is hand wobble.

6. camera as claimed in claim 5 is characterized in that:

Described sensor is the acceleration transducer that the acceleration to the direction vertical with the orientation of the sensitive device of described sensor array detects.

7. camera as claimed in claim 5 is characterized in that:

Also have display unit,

8. camera as claimed in claim 7 is characterized in that:

When being judged as hand wobble as data when being judged as hand wobble and according to the subject of described sensor array output according to the output of described sensor, the display format difference when having taken place that hand wobble shows.

9. camera as claimed in claim 1 is characterized in that:

Also have the sensor that is used to detect hand wobble,

When the subject of described sensor array output is low-light level as data, use the output of described sensor to judge whether it is hand wobble.

10. camera as claimed in claim 9 is characterized in that:

11. camera as claimed in claim 9 is characterized in that:

Also have display unit,

12. camera as claimed in claim 11 is characterized in that:

13. a camera has the hand wobble measuring ability, it is characterized in that: possess

The 1st test section, its use the 1st regularly be different from the 1st regularly the 2nd regularly described subject as data, rocking of the camera in the orientation of described sensitive device detected,

The 2nd test section, it uses described the 1st timing and the 2nd described subject regularly as data, rocking of the direction vertical with the orientation of described sensitive device is detected,

The hand wobble judging part, its according to described the 1st test section and or the output of described the 2nd test section, judge whether it is hand wobble.

14. camera as claimed in claim 13 is characterized in that:

Described the 1st test section by calculate the described the 1st regularly and the 2nd regularly the described subject of described sensitive device orientation as the picture side-play amount of data, the rocking of the sensitive device orientation of detection camera.

15. camera as claimed in claim 14 is characterized in that:

Described the 2nd test section detects rocking of the direction vertical with the sensitive device orientation of camera according to the change of shape of described the 1st timing and the 2nd subject regularly as data.

16. camera as claimed in claim 13 is characterized in that:

17. camera as claimed in claim 16 is characterized in that:

Described the 2nd test section by calculate the described the 1st regularly with the 2nd regularly each sensitive device output signal difference absolute value and, detect the change of shape of described subject as data.

18. camera as claimed in claim 13 is characterized in that:

Described sensor array is the sensor array of range finding usefulness.