CN102238322A - Camera device and shooting method - Google Patents
Camera device and shooting method Download PDFInfo
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- CN102238322A CN102238322A CN2011101120628A CN201110112062A CN102238322A CN 102238322 A CN102238322 A CN 102238322A CN 2011101120628 A CN2011101120628 A CN 2011101120628A CN 201110112062 A CN201110112062 A CN 201110112062A CN 102238322 A CN102238322 A CN 102238322A
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Abstract
The invention provides a camera device and a shooting method. The camera device comprises a lighting unit, with which shooting can be conducted with good image quality even in quite a dark place, and a lighting portion will not be overheated as the electric power required by lighting is not much. The camera device comprises a shooting element (155) capable of shooting dynamic images through continuous shooting, a xenon tube (317) which links to the dynamic images of the shooting element (155) and supply extra quantity of light required in shooting by means of flash to a frame (frame 1, frame 5) of each plurality of frames, an LED (320) which supplements quantity of light required in shooting through continuous lighting by means of quantity of light per unit time which is less than quantity of light during flash to frames (frame 2-4) which flash without using the xenon tube (317), and a camera computing control circuit (151) which modifies images shot by continuous lighting based on images shot by flashes.
Description
Technical field
The present invention relates to camera head and image capture method, specifically, have lighting unit also can be taken dynamic image under the condition of natural daylight deficiency camera head and image capture method even relate to.
Background technology
In the past, when utilizing video camera etc. to take dynamic image, under the darker around situation, the photoflood lamp lighting apparatuss such as (video light) that utilization can be carried out big light quantity continuous illumination shines fill-in light to subject, takes simultaneously.In the past, photoflood lamp is incandescent lamp normally, but recently, (light-emitting diode: etc. development Light EmittingDiode), low-power consumption and small-sized lighting apparatus are also increasing to follow LED.
For example, disclose a kind of flash unit in Japanese publication 2003-233108 communique, it can utilize the continuous luminous subject of shining of LED, and takes dynamic image.And, in open PCT/JP2005/001955 number a kind of camera arrangement is disclosed in the world, when single the bat, utilize photoflash lamp (flash light emission light source) to take, when continuous shooting, make luminous shooting of LED-based continuous illuminating source.In addition, in Japanese publication 2005-107240 communique such camera head is disclosed: for still image, utilize photoflash lamp (flash light emission light source) to take,, make luminous shooting of LED-based continuous illuminating source for continuous shooting and dynamic image.
Proposed the continuous light-emitting device of various employing LED etc. like this, but can be built under the situation that the battery in the portable set drives utilizing, its light quantity is restricted, and it is also not enough, shorter to arrive distance.In addition, even subject is in closely, compare with the flash light emission device that uses the xenon pipe etc., reflection light quantity deficiency from irradiated subject, thereby need to improve the photosensitivity of imaging apparatus, but in this case, exist noise obviously, the problem of image quality variation.
On the other hand, the flash light emission device that uses the xenon pipe and above-mentioned photoflood lamp etc. are compared, and can access the light quantity of varying number level for 1 frame of shooting, and the photosensitivity of imaging apparatus can be lower, thereby noise reduces, image quality is good.But, for dynamic image, for example need in 1 second, take 30 frames etc., take multiple image with the very short cycle, if in whole images, use the flash light emission device, then be used to make the luminous capacitor of xenon pipe to have little time charging.Therefore, can only take dynamic image in the short time at the utmost point.And,, can worry also that then illuminating part is neighbouring overheated if exceedingly use the xenon pipe continuously.
Summary of the invention
The present invention In view of the foregoing proposes, its purpose is, provide a kind of camera head with lighting unit and image capture method as described below: even in darker place, also can take with good image quality, and the needed electric power that throws light on is less, needn't worry that Lighting Division is overheated.
Light quantity when camera head of the present invention is taken with shooting is additional in linkage continuously, this camera head has: image unit, it is taken continuously; The 1st lighting unit, the continuous shooting interlock of itself and described image unit, for 1 frame in a plurality of frames, the light quantity when utilizing the 1st light quantity to replenish shooting; The 2nd lighting unit, it is for the frame of the illumination of not carrying out described the 1st lighting unit, utilizes the few light quantity of described the 1st light quantity of light amount ratio of per 1 frame to replenish light quantity when taking; And graphics processing unit, the image that its light quantity when utilizing described the 1st lighting unit replenish to take photographs is revised the image that utilizes described the 2nd lighting unit to replenish the light quantity when taking and photograph.
In image capture method of the present invention, light quantity when replenishing shooting in linkage with continuous shooting, this image capture method comprises: the shooting step, with described continuous shooting in linkage, for 1 frame in a plurality of frames, light quantity when utilizing the 1st light quantity to replenish to take by the 1st lighting unit, for the frame of the illumination of not carrying out the 1st lighting unit, the light quantity when utilizing the few light quantity of described the 1st light quantity of light amount ratio of per 1 frame to replenish shooting; And image processing step, the image that the light quantity when utilizing described the 1st lighting unit replenish to take photographs is revised the image that utilizes described the 2nd lighting unit to replenish the light quantity when taking and photograph.
According to the present invention, can be the image of the frame that photographs by flash light emission as benchmark, carry out the image quality adjustment of the frame of the continuous luminous low image quality that photographs by deficiency in light quantity.Therefore, can provide a kind of camera head with lighting unit, even in darker place, this camera head also can be taken with good image quality, and the needed electric power that throws light on is less, needn't worry that lighting unit is overheated.
Description of drawings
Fig. 1 is the stereoscopic figure when the face side of the camera head of the 1st execution mode of the present invention is observed.
Fig. 2 is the stereoscopic figure when the rear side of the camera head of the 1st execution mode of the present invention is observed.
Fig. 3 is the stereoscopic figure that the hot shoe of the camera body in the camera head of the 1st execution mode of the present invention is shown.
Stereoscopic figure when Fig. 4 is a strobe light unit in lower side is observed the camera head of the 1st execution mode of the present invention.
Fig. 5 is the block diagram of electrical structure that the camera head of the 1st execution mode of the present invention is shown.
Fig. 6 is camera head that the 1st execution mode of the present invention the is shown action sequential chart regularly when taking dynamic image.
Fig. 7 is the figure of image processing mode of the camera head of explanation the 1st execution mode of the present invention.
Fig. 8 is the figure of image processing mode of the camera head of explanation the 1st execution mode of the present invention.
Fig. 9 is the flow chart of the processing of the picture noise of camera head of explanation the 1st execution mode of the present invention and color correct.
Figure 10 is camera head that the 2nd execution mode of the present invention the is shown action sequential chart regularly when taking dynamic image.
Figure 11 is illustrated in the flow chart that generates in the camera head of the 2nd execution mode of the present invention corresponding to the processing of the high resolution image of frame 2.
Figure 12 is camera head that the 3rd execution mode of the present invention the is shown action sequential chart regularly when taking dynamic image.
Figure 13 is camera head that the 4th execution mode of the present invention the is shown action sequential chart regularly when taking dynamic image.
Embodiment
Below, according to accompanying drawing, use has been used camera head of the present invention and has been come preferred implementation is described.The camera head of the 1st execution mode of the present invention as shown in Figure 1, by the camera body 100 of lens changeable, constitute at lens unit 200 that can load and unload freely on this camera body 100 and the strobe light unit 300 that on this camera body 100, can load and unload freely.
Constitute camera by camera body 100 and lens unit 200, the camera of present embodiment is a digital camera.As shown in Figure 1, in the face side of camera body 100, can load and unload lens unit 200 is installed freely.Upper surface at camera body 100 disposes shutter release button 101, mains switch 102 and hot shoe 103.
And, as shown in Figure 2, dispose back side LCD panel 104, control button 105, menu button 106 in the rear side of camera body 100.When LCD panel 104 enterprising action attitudes show in real time overleaf, according to the view data that obtains by imaging apparatus 155 (with reference to Fig. 5), with the mode dynamic real-time ground demonstration shot object image of dynamic image.The cameraman observes this dynamic real-time image, determines composition and shutter opportunity thus.And, show on the LCD panel 104 overleaf to be used to allow the cameraman carry out the menu screen of various settings, and also show the reproduction demonstration etc. of the view data that has write down.In addition, about back side LCD panel 104,, for example also can be the display floater of organic EL etc. so long as display floater that can display image then is not limited to LCD certainly.
As shown in Figure 1, dispose based on the light-emission window 301 of the flash light emission of xenon pipe with based on the illumination window 302 of the continuous illumination of LED 320 in the face side of strobe light unit 300.And, as shown in Figure 2, dispose the rechargeable lamp 303 that shows charged state in the rear side of strobe light unit 300, be used to indicate the power knob 304 that the power connection of strobe light unit 300 disconnects and be used to be installed in hot shoe pin 305 on the camera body 100.
Use Fig. 3 and Fig. 4 that the hot shoe 103 of camera body 100, the hot shoe pin 305 of strobe light unit 300 are described.Fig. 3 is after having unloaded strobe light unit 300 from camera body 100, stereoscopic figure during from oblique rear view camera fuselage 100, Fig. 4 is after unloading strobe light unit 300 from camera body 100, the stereoscopic figure during from downside Observation Flash lamp unit 300.
In the rear side of camera body 100, near hot shoe 103, be provided with back side connector 108.And, be provided with connector 308 at the downside of the hot shoe pin 305 of strobe light unit 300.When the groove of the hot shoe pin 305 that makes strobe light unit 300 was entrenched in the embeded slot of hot shoe 103 and slides, back side connector 108 fastened with connector 308, and built-in a plurality of contact pins are in contact with one another, and realize being electrically connected.
Below, use block diagram shown in Figure 5 that the electrical structure of the camera head of present embodiment is described.In camera body 100, be provided with camera arithmetic control circuit 151.This camera arithmetic control circuit 151 is according to program stored in not shown nonvolatile memory, carry out the overall control in the camera body 100, and carry out with the communicating by letter of lens unit 200, with the communicating by letter and image processing and of strobe light unit 300 to various controls such as recording medium 154 recording image datas.
And as hereinafter described, camera arithmetic control circuit 151 is also according to the photographs of obtaining when flash light emission, carries out the image correction of the photographs obtained under continuous illumination.That is, carry out following image processing: the image that the light quantity when utilizing aftermentioned the 1st lighting unit replenish to take is taken, revise the image that utilizes the 2nd lighting unit to replenish the light quantity when taking and take.
And, in camera body 100, be provided with battery 152.Power circuit 153 is connected with this battery 152, and power circuit 153 generates and is used for the power supply that the various pieces such as camera arithmetic control circuit 151 in camera body 100 provide.Recording medium 154 is connected with camera arithmetic control circuit 151.Recording medium 154 is nonvolatile memories that flash memory etc. can be rewritten, can be regularly or loading and unloading be configured in freely in the camera body 100.The still image that recording medium 154 records are taken and the data of dynamic image.
In strobe light unit 300, be provided with flash control circuit 311, this flash control circuit 311 carries out the charging with capacitor of various controls in the strobe light unit 300 and photoflash lamp, in response to indication, carry out the light emitting control of photoflash lamp simultaneously from camera body 100 sides.
EEPROM (Electrically Erasable Programmable Read Only Memo)) memory 312 that is connected with flash control circuit 311 for example is EEPROM (Electrically ErasableProgrammable ROM: the nonvolatile memory that can rewrite in the mode of electricity such as.In this memory 312, store the fixed value of when carrying out the control of luminous and charging, using, the constant of adjustment etc.Dispose battery 313 in strobe light unit 300, battery 313 is connected with various pieces such as flash control circuit 311, charging circuit 314, illuminating circuits 315, and provides and carry out the power supply that exercises are used.
The charging circuit 314 that is connected with flash control circuit 311 and battery 313 is photoflash lamps with the charging circuit of capacitor, and the supply voltage of battery 313 is boosted is the high voltage of photoflash lamp illuminating, utilizes this booster voltage that photoflash lamp is charged with capacitor.The illuminating circuit 315 that is connected with battery 313 with charging circuit 314 is according to the indication of flash control circuit 311, applies high voltage so that it begins luminously to xenon pipe 317, and stops luminous according to the indication of flash control circuit 311.
Xenon pipe 317 is connected with illuminating circuit 315, in addition, disposes the reflecting umbrella 316 that the flash of light that is used to make xenon pipe 317 is assembled around xenon pipe 317.Constitute the 1st lighting unit by xenon pipe 317, charging circuit 314, illuminating circuit 315 etc.The continuous shooting interlock of the 1st lighting unit and image unit, the light quantity when utilizing the 1st light quantity that a plurality of frames are replenished shooting respectively.Specifically, the 1st lighting unit carry out fluorescent lifetime than the shooting of 1 frame during short flash illumination.
The drive circuit 318 that is connected with flash control circuit 311 is drive circuits of LED 320, makes LED 320 luminous continuously.Around LED 320, dispose the LED that is used to make the optical convergence that LED 320 sends continuously with reflecting umbrella 319.Constitute the 2nd lighting unit by LED 320, drive circuit 318 etc.The 2nd lighting unit is for the unenforced whole frames of the 1st lighting unit, utilizes the few light quantity of the 1st light quantity of light amount ratio the 1st lighting unit of per 1 frame to replenish light quantity when taking.Specifically, as long as the 2nd lighting unit carries out continuous illumination with fixing light quantity in can be at least during taking.In addition, in the present embodiment, as shown in Figure 5, be to provide by battery 152 and power circuits 153 in the camera body 100 as the light source of the LED 320 of continuous illuminating source.
Hot shoe pin contact 307 in the strobe light unit 300 is connected with hot shoe contact 107 in the camera body 100, and thus, camera arithmetic control circuit 151 and flash control circuit 311 can carry out digital data communications.As this digital data communications, for example the state of strobe light unit 300 can be sent to camera arithmetic control circuit 151, camera arithmetic control circuit 151 is according to the data in the data that receive and camera body 100 and/or the lens unit 200, sends with photoflash lamp luminous to flash control circuit 311 and is designated as main various indications.And the back side connector 108 in the camera body 100 is connected with the connector 308 of configuration on the hot shoe pin 305 of strobe light unit 300, provides driving power from camera body 100 to LED 320 thus.
Below, use Fig. 6 illustrates the means of illumination when taking dynamic image in the camera head of present embodiment.Fig. 6 is the luminous sequential chart that the lighting unit when taking dynamic image is shown.In the present embodiment, as shown in Figure 6, to the illumination (frame 1,5 in figure) of the enforcement of 1 frame in per 4 frames based on the flash light emission (Xe is luminous) of xenon pipe 317.And, in addition 3 frames (frame 2～4 among the figure) are implemented illumination based on the continuous illumination (LED is luminous) of LED 320.In addition, the illumination of the 1st lighting unit that the flash light emission of 1 frame in 4 frames is equivalent to narrate previously, the illumination of the 2nd lighting unit that the continuous illumination of other 3 frame in 4 frames is equivalent to narrate previously.
And, in the present embodiment, carry out the frame of flash light emission for frame 1, frame 5 etc., the shooting photosensitivity of imaging apparatus 155 is set at for example basic photosensitivity of about ISO100.And, carry out frame for frame 2～4 grades, according to the brightness of the subject that obtains by illumination based on the continuous illumination of LED 320, be made as the photosensitivity that realizes correct exposure, but do not reach under the situation of proper level in the raising photosensitivity yet, be set at top high photographic sensitivity, for example ISO3200.
The flash light emission that is undertaken by xenon pipe 317 be between the exposure period of frame in, implement on opportunity that whole pixels of imaging apparatus 155 play a role.Relative therewith, the continuous illumination of being undertaken by LED 320 is to implement the exposure from the light of irradiation LED 320 and the frame taken begins during the end exposure.And the photoflash lamp in the charging circuit 314 stops when the exposure of the frame that carries out flash light emission begins with the charging of capacitor, begins once more when the end exposure of the frame that carries out flash light emission.On the exposure of frame and the opportunity between the exposure, carry out reading of picture signal by camera arithmetic control circuit 151 from imaging apparatus 155, be kept in the memory that is built in the camera arithmetic control circuit 151 temporarily based on the view data of the picture signal that is read.
Throw light on according to above mode, take dynamic image simultaneously, the step about this moment describes according to sequential chart shown in Figure 6.At first, utilize flash light emission that subject is thrown light on, simultaneously the image of photographed frame 1.Therefore, at moment t11, imaging apparatus 155 begins to take (exposure), and stops the charging of the photoflash lamp of charging circuit 314 with capacitor.And at the moment t12 that whole pixels of imaging apparatus 155 play a role, camera arithmetic control circuit 151 begins indication to flash control circuit 311 output flash light emissions, and xenon pipe 317 carries out flash light emission.
When due in t14, finish the shooting of imaging apparatus 155, and begin the charging of photoflash lamp once more with capacitor.Then, during moment t15～moment t16, from imaging apparatus 155 reading images signals and interim storage.In addition, during the frame 1 of moment t11～t21, LED 320 keeps the state that extinguishes, and will take photosensitivity be set at ISO100 in illustrated example.
Carry out flash light emission and obtain view data at frame 1, the continuous illumination of carrying out based on LED 320 at frame 2 obtains view data simultaneously then.At first, at moment t21, beginning is based on the continuous illumination of LED 320, and the shooting of beginning imaging apparatus 155.Stop shooting when due in t22, during moment t25～moment t26, the reading images signal is also obtained view data.In frame 3, frame 4, take in the same manner with image with frame 2 and to read.And during this period, LED 320 keeps continuous illumination, in illustrated example, the shooting photosensitivity is set at the ISO of ISO3200.And the photoflash lamp in the charging circuit 314 is proceeded with the charging of capacitor.
In frame 4, after obtaining view data, enter frame 5 from moment t51, identical in this action with frame 1, promptly carry out flash light emission and obtain view data.After, alternately 1 frame of 3 of continuous illumination frames and flash light emission repeatedly carries out the dynamic image shooting.
Below, use Fig. 7 and Fig. 8 that the image processing of the camera head of present embodiment is described.As previously described, in frame 1,5 etc., to the bigger flash light emission of subject irradiation light quantity, so can obtain images with high image quality, and in frame 2～4 grades, subject is shone based on the less continuous illumination light of the light quantity of LED 320, so can only obtain the image of low image quality.Therefore, in the present embodiment, use the images with high image quality that when carrying out flash light emission, obtains to revise the image of when carrying out continuous illumination, obtaining.
Fig. 7 (a), Fig. 7 (b1), Fig. 7 (c1), Fig. 7 (d), Fig. 7 (e1) are illustrated in the image that frame 1, frame 2, frame 3, frame 5, frame 6 photograph.In addition, the image that photographs at frame 4 is same with the image that photographs at frame 3, so be omitted, carries out the action same with frame 2 for frame 6 in addition.
About image shown in the image shown in the Fig. 7 (a) that photographs at frame 1 and Fig. 7 (d) of photographing at frame 5 etc., owing to utilize the flash light emission of xenon pipe 317 to throw light on, and take with the ISO100 of the less low speed of noise, so be the final image that need not carry out bigger correction basically.On the other hand, about Fig. 7 (b1), the Fig. 7 (c1) that photographs at frame 2,3,6, the image shown in Fig. 7 (e1) etc., owing to be the image that utilizes the continuous illumination shooting of LED 320, deficiency in light quantity is so take with the ISO3200 of ISO.Therefore, become the image that reproducibility is relatively poor, noise is more of color.
Therefore, for the image shown in Fig. 7 (b1), Fig. 7 (c1), with reference to the image shown in the Fig. 7 (a) in the frame of just having taken before this 1, the part that is estimated as same object is revised, make aspect reproduction, the color when having reduced noise and the gray scale in color identical.Therefore, image shown in Fig. 7 (b1) becomes the image shown in Fig. 7 (b2) after revising, the image shown in Fig. 7 (c1) is after revising, shown in Fig. 7 (c2), become image as described below: in the reproducibility that improves color, reduction noise, revised the gray scale of color.
Equally, for the image shown in Fig. 7 (e1), with reference to the image shown in the Fig. 7 (d) in the frame of just having taken before this 5, the part that is estimated as same object is revised, make the image shown in Fig. 7 (e1) after revising, shown in Fig. 7 (e2), become image as described below: in the reproducibility that improves color, reduction noise, revised the gray scale of color.The two field picture of final dynamic image becomes Fig. 7 (a), Fig. 7 (b2), Fig. 7 (c2), Fig. 7 (d), Fig. 7 (e2) ... shown in image, and be recorded in the storage medium 154.
Under the situation of the correction of carrying out image shown in Figure 7, the image that photographs in each frame has often moved a little.Therefore, in the present embodiment, detect the mobile vector of the image between 2 frames, photograph, consider that this mobile vector determines the position of correspondence.Fig. 8 is the figure of mobile vector detected value that represents the image of frame 1 and frame 2 according to profile.That is, Fig. 8 (a) is the image that photographs at frame 1, and Fig. 8 (b) is the image that photographs at frame 2, and Fig. 8 (c) is with the figure after two picture registrations.Arrow among Fig. 8 (c) is represented to move detected direction and size according to the profile at each position.For example, the regional A1 in the image of frame 1 moves to the regional A2 in the image of frame 2.
Below, use flow chart shown in Figure 9 that the picture noise of camera head of present embodiment and the correcting process of color are described.At this, as example, the flow process the when image of revising frame 2 is described.In addition, this flow process is carried out according to the program that is written in non-volatile memory by camera arithmetic control circuit 151.
After the shooting of the image of the frame 2 that is through with, whether the noise of at first judging frame 2 big (S1).At this, come the detection noise amount according to the view data of the integral image that photographs at frame 2, judge that whether this noisiness is greater than predetermined value.As predetermined value, it is relatively poor and be unworthy the degree appreciated to be made as image quality.
In the result of determination of step S1 is under the little situation of the noise of frame 2, and whether the misalignment of then judging frame 2 big (S2).At this, the view data of the frame 1 that will carry out glistens makes a video recording and the view data of frame 2 compare, and judge whether misalignment is little.Even the result of determination of step S1 be noise hour, also have the bigger situation of misalignment, so judge in this step.
At this, about the judgement of noise size, the output horizontal departure of each pixel of the presumptive area in the observer frame 2 for example, and with compare and judge from the deviate of sense angle initialization in advance.About misalignment, for example the chromatic value with the presumptive area in the colourity of the presumptive area in the frame 2 and the frame 1 compares, if there is the difference more than the predetermined chromaticity value, it is big then to be judged to be misalignment.
In the result of determination of step S1 is under the big situation of the noise of frame 2, is under the big situation of the misalignment of frame 2 in the result of determination of step S2 perhaps, then from step S3, carries out image correction.At first, detect the profile information (S3) of frame 1,, detect the profile information (S4) of frame 2 then so that carry out image correction.When detecting profile information, use view data to seek brightness and the bigger position of change in color, this position is made as profile.
Behind the profile information that detects frame 1 and frame 2, then detect each regional mobile vector (S5), setting is at the reference area (S6) of the frame 1 of each fine region of frame 2.At this, the profile of the image that will photograph at frame 1 and frame 2 compares, and set up related, according to illustrated in fig. 8 like that, each fine region is detected the mobile vector of the profile of frame 1 and frame 2.When calculating mobile vector, apart from profile zone far away be according to around the mobile vector of profile carry out interpolation and calculate.After determining mobile vector, use the reference area of the frame 1 that this mobile vector is determined and setting is corresponding with the fine region of frame 2.Therefore in addition, fine region is the unit when carrying out image correction, so long as feel the area size of the degree of nature get final product when utilizing naked eyes to observe.
After detecting mobile vector and setting reference area, then revise the image (S7) of frame 2.At this, according to each regional mobile vector of setting in step S106, the fine region of the frame 1 that contrast is corresponding is carried out the color adjustment and the noise remove of each fine region of frame 2.In the example of Fig. 8, the color of the regional A1 of contrast frame 1, the noise of the regional A2 of reduction frame 2.After generating correction image, finish flow process to the correction of frame 2 at step S7.
After the correction of carrying out frame 2, carry out then reading at the shooting and the image of frame 3, use this view data that reads out and, carry out the flow process identical, and generate correction image at frame 3 with flow process shown in Figure 9 at the image of frame 1.Then, the image that photographs under the continuous illumination of LED 320 is revised, and generated revised dynamic image.This correction dynamic image is recorded in the recording medium 154 as final dynamic image file.
According to above explanation, in the camera head of the 1st execution mode of the present invention, can carry out flash light emission according to the ratio of every a plurality of frames 1 time, in the frame that does not carry out flash light emission, carry out the boost charge of charging circuit 314, even dynamic image also can continue luminous for a long time.
And, in the present embodiment, in the frame that does not carry out flash light emission, carry out continuous illumination, thereby can obtain the image of fixing horizontal based on LED 320.And, in the frame that does not carry out flash light emission, set higher shooting photosensitivity, thereby under the less continuous illumination of light quantity, also can be fixed the image of level.
In addition, in the present embodiment, the image that utilizes flash light emission to take as the basis, is proofreaied and correct the noise and the color of the image that do not carry out flash light emission.Therefore, even do not carry out the frame of flash light emission, also can access with based on the roughly the same image quality of the image of flash light emission.
In addition, in the present embodiment, the mobile vector of the profile of detected image, and between definite frame should be corresponding the zone.Therefore, the image in the time of can using the image of obtaining by flash light emission to come that each zone correctly revised continuous illumination.
In addition, in the present embodiment, be provided for carrying out the power supply of the LED 320 of continuous illumination from camera body 100 sides.Therefore, even be under the situation that photoflash lamp is used in the charged state of capacitor and battery load is bigger, also can access enough electric power at the power supply of strobe light unit 300.And, owing to can not exert an influence, so, can carry out flash light emission at once even be still image from dynamic image switching to the charging interval of photoflash lamp with capacitor yet.
In addition, in the present embodiment, be configured to: camera body 100 and lens unit 200 can freely load and unload, and strobe light unit 300 and camera body 100 can freely load and unload.But, be not limited to this mode, also can be configured to: at least one side in lens unit 200 and the strobe light unit 300 is fixed on the camera body 100 and can not loads and unloads.
In addition, in the present embodiment, the interval of flash light emission being made as per 4 frames 1 time, but being not limited to this mode, also can be to Duo or few frame number than 4 frames.Especially under the less situation of motion, it is also no problem that bigger interval is set.And, also can detect the motion of subject, and change the interval of flash light emission in view of the above.
In addition, in the present embodiment, the power supply that carries out the LED 320 of continuous illumination is to provide from camera body 100 interior batteries 152.But, be not limited to this mode, also can provide from the battery 313 in the strobe light unit 300.In this case, owing to also charge with capacitor from the photoflash lamp of 313 pairs of charging circuits 314 of battery, so preferred jumbo battery.
Below, use Figure 10 and Figure 11 that the 2nd execution mode of the present invention is described.In the 1st execution mode, when utilizing LED 320 to carry out continuous illumination, luminous continuously from moment t21 in frame 2～frame 4 to moment t44.Relative therewith, in the 2nd execution mode, between frame 2～frame 4, only imaging apparatus 155 take (exposure) during carry out continuously luminous.The structure of the structure of present embodiment and Fig. 1～shown in Figure 5 is identical, but different with the action shown in sequential chart shown in Figure 6 and the flow chart shown in Figure 9, so be that the center describes with this difference.
Figure 10 illustrates the sequential chart of present embodiment.Be that with the difference of the 1st execution mode the light-emitting mode of LED 320 is that the exposure in response to shooting usefulness begins and lights at every frame, and extinguishes in response to exposure stops.That is, in frame 2, imaging apparatus 155 begins to take at moment t21, and LED 320 beginnings simultaneously are luminous continuously.And when due in t24, imaging apparatus 155 stops to take, and LED 320 stops continuously luminous simultaneously.
Figure 11 illustrates the flow chart of present embodiment.About this flow chart, identical with the situation of the 1st execution mode, also enumerate following example and describe, that is: carry out this flow process by camera arithmetic control circuit 151 according to program stored in non-volatile memory, and will be images with high image quality corresponding to the image correction of frame 2.
In Figure 11, after the shooting of frame 2 finishes, at first detect the profile information (S11) of frame 1, detect the profile information (S12) of frame 2 then.At this, identical with step S3, the S4 of the 1st execution mode, when detecting profile information, use view data to seek brightness and the bigger position of change in color, this position is made as profile.
Then, detect each regional mobile vector (S13).At this, identical with the step S5 of the 1st execution mode, the profile of the image that will photograph at frame 1 and frame 2 compares, and sets up relatedly, each fine region is calculated the mobile vector of the profile of frame 1 and frame 2.When nearby not detecting under the situation of profile, according to around the row interpolation that moves forward into of profile calculate.
After calculating mobile vector, then the image of frame 1 is carried out anamorphose according to mobile vector, make profile with frame 2 coincide (S14).At this, for example in Fig. 8 (c), make the regional A1 of the image of frame 1 move to the regional A2 of the image of frame 2, in whole image, carry out moving of each zone, obtain deformation pattern.By this anamorphose, generate image quality and frame 1 identical and with the identical image of frame 2.
After carrying out anamorphose, then will be from frame 1 to frame the variation of 2 brightness be reflected in (S15) the deformation pattern.At this, with respect to frame 1 part that changes has taken place if having brightness in frame 2, then adjust the brightness of corresponding region.After in step S15, generating correction image, finish flow process to the correction of frame 2.
After the correction of carrying out at frame 2, then carry out reading at the shooting and the image of frame 3, use this view data that reads out and, carry out the flow process identical, and generate correction image at frame 3 with flow process shown in Figure 11 at the image of frame 1.Then, the image of obtaining under the continuous illumination of LED 320 is revised, generated revised dynamic image.This correction dynamic image is recorded in the recording medium 154 as final dynamic image file.
According to above explanation, in the camera head of the 2nd execution mode of the present invention, the light-emitting mode of LED 320 is set to only luminous continuously when imaging apparatus 155 is taken, so compare with the 1st execution mode, can reduce the luminous power of LED 320.
And, in the present embodiment, correction image for the frame that does not throw light on by flash light emission, image with the frame that carried out flash light emission is that the basis is out of shape, thereby for the frame that does not throw light on by flash light emission, the low treatment circuit of noise processed ability do not need to reduce the processing of noise, even can be tackled yet.And,, also can improve and the consistent degree that has carried out the frame of flash light emission about tone etc.Also can reach the effect of the structure identical with the 1st execution mode in others.
In addition, in the present embodiment, among the step S11 that after the view data that obtains frame 2, carries out, detect the profile information of frame 1.But, being not limited to this mode, can certainly and obtain after the view data that obtains frame 1 before the view data of frame 2, detect profile information.
Below, use Figure 12 that the 3rd execution mode of the present invention is described.In the 1st and the 2nd execution mode, utilize xenon pipe 317 to carry out flash light emission, and in the 3rd execution mode, carry out flash light emission by the LED 320 that carries out continuous illumination.That is, in the present embodiment, also double the 1st lighting units of doing such as LED 320, drive circuit 318.The structure of the structure of present embodiment and Fig. 1～shown in Figure 5 is identical, but sequential chart difference shown in Figure 6, thereby is that the center describes with this difference.
Figure 12 is the sequential chart of present embodiment, in the present embodiment, carries out flash light emission in frame 1, utilizes LED 320 to carry out continuous illumination in frame 2～4.But,, during moment t11～moment t13, in LED 320 is during the short time, carry out flash light emission with high brightness about the flash light emission in the frame 1.And, in frame 5, during short time of moment t51～moment t53 in, carry out flash light emission by LED 320 with high brightness.In addition, t13, moment t53 can be more Zao or late than the moment t12 among Fig. 6, moment t52 constantly.
The flash light emission of LED 320 is achieved in that promptly: the photoflash lamp of the charging circuit 314 of xenon pipe 317 usefulness is injected LED 320 with the electric charge of capacitor, make LED 320 carry out luminous with high brightness at short notice.In addition, about the flash light emission of LED 320, except photoflash lamp is used capacitor, also can dispose other capacitor, and utilize this capacitor.And, under the abundant situation of power supply, also can directly flow through big electric current, and not use the charging current of capacitor from power supply.
According to the 3rd execution mode of the present invention, under the situation that does not need the light quantity as the flash light emission of xenon pipe 317, to control fairly simplely, energy efficiency is good, and heating is few, so be suitable for taking long dynamic image.Also can reach the effect of the structure identical with the 1st and the 2nd execution mode in others.
In addition, in the present embodiment, in frame 2～4, LED 320 is identical with the 2nd execution mode, only carries out continuous illumination during taking, but also can be identical with the 1st execution mode, carries out continuous illumination between frame 2～4.And present embodiment is the variation of the means of illumination of the 1st execution mode, so image processing is carried out the shown in Figure 9 flow chart identical with the 1st execution mode, but also can carry out flow chart shown in Figure 11.
Below, use Figure 13 that the 4th execution mode of the present invention is described.In the 1st～the 3rd execution mode, utilize LED 320 to carry out continuous illumination, and in the 4th execution mode, carry out continuous illumination by the xenon pipe 317 that carries out flash light emission.That is, in the present embodiment, also double the 2nd lighting units of doing such as xenon pipe 317, charging circuit 314, illuminating circuit 315.The structure of the structure of present embodiment and Fig. 1～shown in Figure 5 is identical, but sequential chart difference shown in Figure 6, thereby is that the center describes with this difference.
Figure 13 is the sequential chart of present embodiment, in the present embodiment, utilizes xenon pipe 317 to carry out flash light emission in frame 1, and carry out continuous illumination in frame 2～4.But the continuous illumination in the frame 2～4 (t21～moment t24, moment t31～moment t34, moment t41～moment t44 constantly) is to carry out by xenon pipe 317 and according to the smooth luminous of so-called photoflash lamp.
Smooth luminous be such illumination mode: make xenon pipe 317 beginning luminous, switch on and off the electric current that flows through xenon pipe 317 repeatedly with the cycle of extremely lacking after beginning, it is small luminous that xenon pipe 317 is carried out continuously, substantially carries out continuously luminous.
According to the 4th execution mode of the present invention, utilize the smooth luminous of xenon pipe 317 to carry out continuous illumination, thereby can access the bigger continuous illumination of light quantity.Therefore, but need situation more continuous luminous light quantity, remote subject more effective for time ratio is short.And, in the present embodiment, do not need LED 320.Therefore, can realize the miniaturization of strobe light unit 300.Also can reach the effect of the structure identical with the 1st～the 3rd execution mode in others.In addition, present embodiment is the variation of the means of illumination of the 1st execution mode, so image processing is identical with the 1st execution mode, carries out flow chart shown in Figure 9, but also can carry out flow chart shown in Figure 11.
According to above explanation, in each execution mode of the present invention, have: the 1st lighting unit (for example xenon pipe 317, charging circuit 314, illuminating circuit 315 etc.), its continuous shooting with the image unit that comprises imaging apparatus 155 grades links, the light quantity when utilizing the 1st light quantity (flash light emission) to replenish shooting to a frame in every a plurality of frames (for example frame 1,6); And the 2nd lighting unit (for example LED 320, drive circuit 318 etc.), it is not for by throw light on whole frames (for example frame 2～5) of (flash light emission) of the 1st lighting unit, light quantity when utilizing the light quantity lacked than the 1st light quantity (flash light emission) and replenishing shooting by continuous illumination, light quantity when the illumination that utilizes the 1st lighting unit (flash light emission) replenish is taken and the image that photographs are revised the image that luminous continuously (illumination of the 2nd lighting unit) by deficiency in light quantity photographs as benchmark.Therefore, even in darker place, also can take, and the needed electric power that throws light on is less, needn't worries that Lighting Division is overheated with good image quality.
In addition, in each execution mode of the present invention, camera head is configured to freely load and unload lens unit 200 on camera body 100, but is not limited to this mode, also can be configured to lens unit is fixed on the camera body 100 and can not load and unload.And, the interval of flash light emission is made as per 4 frames 1 time, but is not limited to this mode at interval.Under the less situation of motion, even it is also no problem to enlarge the interval.Also can detect the motion of subject, and change the interval of flash light emission according to this testing result.In addition, the image that utilizes the 2nd lighting unit to photograph is all revised, but also can only be revised a part of image.
And in each execution mode of the present invention, the power supply of strobe light unit 300 is configured in inside, but also can be the independent power supply that is configured in the outside of strobe light unit 300.And, also can only be used to supply with and move from the power supply of camera body 100.In addition, LED can also utilize the power supply of strobe light unit 300 to move.
In addition, in each execution mode of the present invention, disposed xenon pipe 317 and LED 320, but xenon pipe 317 also can be other strobo, LED 320 also can be that other semiconductor light-emitting elements etc. can luminous continuously element.
And, in the present embodiment, equipment as shooting usefulness, the use digital camera is illustrated, but camera also can be digital single-lens reflex camera, compact digital camera, can also be the camera that is built in mobile phone and portable data assistance (PDA:Personal Digital Assist), the game station etc.No matter be which kind of camera,, just can be suitable for the present invention so long as can take the camera head of dynamic image.
The invention is not restricted to above-mentioned execution mode, the implementation phase in, can without departing from the spirit and scope of the present invention inscape be out of shape and specifically implement.And,, also can form various inventions according to the appropriate combination of the disclosed a plurality of inscapes of above-mentioned execution mode.For example, can delete several inscapes in the disclosed whole inscapes of execution mode.In addition, the inscape in the different execution modes can also be carried out appropriate combination.
Claims (7)
1. camera head, its with take the light quantity of replenishing in linkage when taking continuously, this camera head has:
Image unit, it is taken continuously;
The 1st lighting unit, the continuous shooting interlock of itself and described image unit, for 1 frame in predetermined a plurality of frames, the light quantity when utilizing the 1st light quantity to replenish shooting;
The 2nd lighting unit, it is for the frame that is not thrown light on by described the 1st lighting unit, utilizes the few light quantity of described the 1st light quantity of light amount ratio of per 1 frame to replenish light quantity when taking; And
Graphics processing unit, the image that its light quantity when utilizing described the 1st lighting unit replenish to take photographs is revised the image that utilizes described the 2nd lighting unit to replenish the light quantity when taking and photograph.
2. camera head according to claim 1, wherein,
Described the 1st lighting unit carry out fluorescent lifetime than the shooting of 1 frame during short flash illumination, described the 2nd lighting unit carries out continuous illumination with fixing light quantity at least during taking.
3. camera head according to claim 2, wherein,
Described the 1st lighting unit utilizes the xenon pipe to carry out flash illumination, and described the 2nd lighting unit utilizes LED to carry out continuous illumination.
4. camera head according to claim 2, wherein,
Described the 1st lighting unit utilizes LED to carry out flash illumination, and described the 2nd lighting unit utilizes LED to carry out continuous illumination.
5. camera head according to claim 2, wherein,
Described the 1st lighting unit utilizes the xenon pipe to carry out flash illumination, and described the 2nd lighting unit utilizes the xenon pipe smooth luminously carries out continuous illumination.
6. camera head according to claim 1, wherein,
The image that the light quantity of described graphics processing unit when utilizing described the 1st lighting unit replenish to take photographs makes the image quality of the image that utilizes described the 2nd lighting unit to replenish the light quantity when taking and photograph become identical image quality.
7. image capture method replenishes light quantity when taking in linkage with continuous shooting, and this image capture method comprises:
The shooting step, with described continuous shooting interlock, for 1 frame in the multiframe, the light quantity when utilizing the 1st light quantity to replenish shooting by the 1st lighting unit, for the frame that does not throw light on, utilize the few light quantity of described the 1st light quantity of light amount ratio of per 1 frame to replenish light quantity when taking by the 1st lighting unit; And
Image processing step, the image that the light quantity when utilizing described the 1st lighting unit replenish to take photographs is revised the image that utilizes described the 2nd lighting unit to replenish the light quantity when taking and photograph.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP2010-107486 | 2010-05-07 | ||
| JP2010107486A JP5474653B2 (en) | 2010-05-07 | 2010-05-07 | Imaging apparatus and imaging method |
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| Publication Number | Publication Date |
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| CN102238322A true CN102238322A (en) | 2011-11-09 |
| CN102238322B CN102238322B (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110112062.8A Expired - Fee Related CN102238322B (en) | 2010-05-07 | 2011-04-29 | Camera device and shooting method |
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| CN (1) | CN102238322B (en) |
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| CN108196414A (en) * | 2018-02-09 | 2018-06-22 | 马振全 | A kind of camera shooting, photography integrated lamp and application method |
| CN108604043A (en) * | 2016-01-27 | 2018-09-28 | 富士胶片株式会社 | Camera and its control method |
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| JP5474653B2 (en) | 2014-04-16 |
| JP2011239084A (en) | 2011-11-24 |
| CN102238322B (en) | 2015-01-07 |
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