CN102636934A - Distance measuring device, distance measuring method, photographing device and photographing method - Google Patents
Distance measuring device, distance measuring method, photographing device and photographing method Download PDFInfo
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- CN102636934A CN102636934A CN2012100230377A CN201210023037A CN102636934A CN 102636934 A CN102636934 A CN 102636934A CN 2012100230377 A CN2012100230377 A CN 2012100230377A CN 201210023037 A CN201210023037 A CN 201210023037A CN 102636934 A CN102636934 A CN 102636934A
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Abstract
The present invention relates to a distance measuring device, a distance measuring method, a photographing device with the distance measuring device, and a photographing method. The invention aims to stop power supply of certain special power supplies in the distance measuring device at a state without AF processing for reducing electric power consumption. The distance measuring device comprises the following components: first and second distance measuring lens (111,112) which images incident light of a photographed member, and first and second distance measuring components (121,122) which is used for outputting first and second distance measuring signals that correspond with the photographed member. Furthermore the distance measuring device can communicate with a main control device (10) which determines the distance between the distance measuring components and the photographed member based on the distance measuring signals. Furthermore the distance measuring device is provided with the following components: an image conversion part (130) which converts the distance measuring signals to a format that corresponds with the interface of the main control device, and a power supply control part (132) which controls power supply to the image conversion part. When the distance measuring device is converted from a common mode to an energy-saving mode, the power supply control part controls for stopping power supply to the image conversion part.
Description
Technical field
The present invention relates to distance measuring equipment and distance-finding method, and relate to camera head and the image capture method that possesses this distance measuring equipment.Two images that this distance measuring equipment utilization obtains with imaging apparatus with two range findings confirm that these two range findings are with imaging apparatus and taken the photograph the distance between the body; When not needing the state of automatic focusing process (below be called AF handle); The power supply of some particular power source tries hard to reduce electricity consumption in a plurality of power supplys that stop to use in the distance measuring equipment action.
Background technology
About automatic focusing, there is multiple mode at present, contrast method and phase method are for example arranged, can be used for realizing with the small digital cameras is the automatic focus function (below be called the AF function) of the camera head of representative.Contrast method AF mode is meant and moves the camera lens that constitutes image pickup optical system on one side; Obtain image in the moment of regulation on one side; Confirm that then contrast is the lens location of the image of maximum in all images, and camera lens is moved to this position, to being taken the photograph the method that body is focused.In other words, contrast method AF mode need be in the driving scope of regulation the camera lens of actual dollying optical system.For this reason, the problem of contrast method AF mode when being used for long focal length lens is, because of the lens driving scope need confirm to focus the position with the long processing time greatly.
Than contrast method AF mode, phase method AF mode can focus at a high speed.Utilize the camera head of phase method AF mode to possess range-finding optical system, this range-finding optical system is to be different from the optical system of other setting that the photographic optical system of body is taken the photograph in shooting, has two imaging apparatuss.In phase method AF mode, obtain two images respectively with two imaging apparatuss, calculate the phase differential (parallax) between these two images, leave the distance of being taken the photograph body with these two imaging apparatuss of this phase difference calculating.Phase method AF mode does not need moving lens, and calculates based on shot object image, therefore, than contrast method AF mode, can comparatively fast confirm to focus the position.But above-mentioned two images are respectively from two different imaging apparatus outputs.If it is inconsistent to obtain the moment or the image quality of each image, then can't accurately calculate parallax, for this reason, in the camera head that adopts phase method AF mode, the visual output time of each imaging apparatus needs synchronously, and the specification of imaging apparatus is consistent very important.Yet this high-performance imaging apparatus price is very expensive.In addition, because of needs carry the range-finding optical system that is different from image pickup optical system, and this range-finding optical system needs higher installation accuracy, the problem that for this reason adopts phase method AF mode also can cause number of elements increase, manufacturing cost to rise.
Except the AF mode of contrast method and phase method, mix the AF mode in addition, this mode is used for solving the problem that the AF mode of contrast method and phase method exists.
Mixing the AF mode at first roughly calculates the range finding element and is taken the photograph the distance between the body with phase place AF mode; According to the distance of calculating the camera lens of image pickup optical system is moved to the lens location of regulation, then focus with contrast method AF mode near the specialized range the position after moving.In mixing the AF mode, the distance calculation of carrying out with phase method AF mode is not high to accuracy requirement, and the driving scope that in contrast method AF mode, can dwindle camera lens, therefore can shorten the desired time that focuses.
Patent documentation 1 (TOHKEMY 2001-221945 communique) disclose a kind of carry the AF mode of mixing, and the multiple point distance measurement zone that cooperates the AF unit that possesses range-finding optical system to obtain change with contrast method AF mode and focus the regional device of AF that uses when detecting.In addition, patent documentation 2 (TOHKEMY 2003-107326 communique) discloses in another and has installed, this device according to the range finding element with to be taken the photograph the AF that uses when distance between the body changes with contrast method AF mode regional.The range finding visual angle of the range-finding optical system of the AF zone matching and fixing focus that all need focus with contrast method AF mode in the disclosed device of above-mentioned patent documentation.
In recent years, to the further high speed high precision int of AF functional requirement, meanwhile, also require further to reduce the distance measuring equipment manufacturing cost and reduce electricity consumption.The high speed of existing distance measuring equipment and high precision int remain further to be developed in the following areas; Promptly in adopting phase method AF mode; Need further the raising to possess the quality of fit that height is adjusted imaging apparatus output time when exporting two images synchronously of function constantly; Perhaps exploitation is installed in the sensor special of the imaging apparatus that is used to export two images in the custom layout (IC), perhaps adopts the two hybrid plan etc.
Yet the cost of development and the manufacturing cost that possess the imaging apparatus of constantly adjusting function or custom layout (IC) are high, and be inconsistent with the purpose that reduces the distance measuring equipment manufacturing cost.And iff can use cheap conventional imaging apparatus from the purpose that reduces manufacturing cost, yet in this case, for distance measuring equipment can must be transformed the system of existing distance measuring equipment to should conventional imaging apparatus.
In camera head, the large scale integrated circuit (LSI) that carries out whole control adopts CPU and the unified system lsi (LSI) that carries out Flame Image Process usually.And system LSI can't be answered increasing considerably of docking port as a rule.The conventional imaging apparatus that therefore, whether can in existing distance measuring equipment, carry two cheapnesss depends on that the system LSI specification changes.Yet the specification of system LSI is changed not only cost height but also time-consuming, hinders product and drops into batch process early.This problem is the new obstacle that in the utilization of the conventional imaging apparatus of cheapness, occurs.
To there not being corresponding interface in the system LSI but need to carry the distance measuring equipment of cheap conventional imaging apparatus, there is a kind of method of utilizing conversion between distance measuring equipment (imaging apparatus) and the camera head (system LSI) to increase imaging apparatus with circuit (change and use IC) in prior art.But, utilize conversion to use circuit, can cause the electricity consumption of distance measuring equipment entire system to rise, the battery consumption that increases distance measuring equipment and possess the camera head of this distance measuring equipment is difficult to keep long continuous action.
[0011]
To the problems referred to above, can consider that promptly distance measuring equipment can cut off the action power of camera head circuit or imaging apparatus when not needing instant action, transfers to energy-conservation mode in order to method solution down.But, constituting conversion and use a plurality of power supplys with the element of circuit such as field programmable gate array (EPGA), this method can make and transfer to energy-conservation mode or the power supply control when the withdrawing from energy-conservation mode complicacy that becomes for this reason, the control time also will increase.Moreover, the number of elements that is used for power supply control increases, and manufacturing cost also will rise thereupon.In addition, circuit substrate also can take place arrange the problem that is squeezed.
About reducing the consumption of distance measuring equipment battery; A kind of camera is for example disclosed in patent documentation 2; When this camera is focused action repeatedly in the mode of focusing continuously; Wait the reference variable of the focus evaluated value of setting time interval of restarting and when restarting according to photography conditions, optimize the photography action, reduce battery consumption.
Though though patent documentation 2 disclosed cameras can change the AF evaluation of estimate in the contrast method AF mode according to photography conditions; Reducing unwanted contrast AF handles; And reduce battery and consume; But how it does not provide in the distance measuring equipment of finding range with two conventional imaging apparatuss based on phase method AF mode, and the system LSI specification that keeps using in the existing distance measuring equipment is constant, reduces the cost simultaneously and reduce the method for battery consumption.
Summary of the invention
The camera head that the object of the present invention is to provide a kind of distance measuring equipment that is used to address the above problem and possess this distance measuring equipment, this distance measuring equipment is found range with the image that imaging apparatus obtains with two range findings, low cost of manufacture, energy-conservation mode control is simple.
In order to achieve the above object, the present invention specifically provides following technical scheme.
(1) at first, the present invention provides a kind of distance measuring equipment, can between mode commonly used and energy-conservation mode, shift, and it is characterized in that, comprising: first anallatic lens and second anallatic lens are used for making and form images from the incident light of being taken the photograph body; And; The first range finding element and the second range finding element; Be respectively applied for output first distance measuring signal and second distance measuring signal, this first distance measuring signal is with corresponding through the shot object image of said first anallatic lens imaging, and this second distance measuring signal is with corresponding through the shot object image of said second anallatic lens imaging; And can communicate by letter with main control unit; This main control unit confirms respectively said first range finding element and said distance and said second range finding element and the said distance of being taken the photograph between the body of being taken the photograph between the body, and then has image transitions portion and power control part according to said first distance measuring signal and said second distance measuring signal; This image transitions portion converts said first distance measuring signal and said second distance measuring signal to the signal of corresponding said main control unit interface shape; This power control part is used to control the power supply of said image transitions portion, and when transferring to said energy-conservation mode from said mode commonly used, said power control part control stops the power supply to said image transitions portion.
(2) the present invention also provides according to above-mentioned (1) described distance measuring equipment, wherein, with the said image transitions of a plurality of power drives portion, the power supply of said power control part control stopping a part of power supply in said a plurality of power supply.
(3) the present invention also provides according to above-mentioned (1) or (2) described distance measuring equipment; Wherein, Also possess the clock supply unit, this clock supply unit provides the Action clock of said first range finding element and the said second range finding element via said image transitions portion, when changing said energy-conservation mode over to from said mode commonly used; Said power control part control stops to make this clock supply unit stop to provide said Action clock to said clock supply unit power supply.
(4) the present invention also provides according to above-mentioned (1) or (2) described distance measuring equipment; Wherein, Also possesses the clock supply unit; This clock supply unit provides the Action clock of said first range finding element and the said second range finding element via said image transitions portion, and when said mode commonly used changed said energy-conservation mode over to, said clock supply unit control stopped that one of them provides Action clock to the said first range finding element and the said second range finding element.
(5) the present invention also provides according to above-mentioned (4) described distance measuring equipment; Wherein, Said main control unit connects display, on this display, show with said first range finding element and the said second range finding element in be not stopped the corresponding image of distance measuring signal of the range finding element output that said Action clock supplies with.
(6) the present invention also provides according to above-mentioned (1) described distance measuring equipment, wherein, can change said first range finding element and the said second range finding element are exported said distance measuring signal in the unit interval output time.
(7) the present invention also provides another kind of distance measuring equipment, can between mode commonly used and energy-conservation mode, shift, and it is characterized in that, comprising: anallatic lens is used for making and forms images from the incident light of being taken the photograph body; And; The range finding element is used to export and the corresponding distance measuring signal of shot object image that forms images through said anallatic lens, and can communicates by letter with main control unit; This main control unit is confirmed said range finding element and the said distance of being taken the photograph between the body according to said distance measuring signal; And then also have image transitions portion and a power control part, and this image transitions portion converts said distance measuring signal the signal of corresponding said main control unit interface shape to, and this power control part is used to control the power supply of said image transitions portion; When transferring to said energy-conservation mode from said mode commonly used, said power control part control stops the power supply of a part of said image transitions portion.
(8) the present invention also provides according to above-mentioned (7) described distance measuring equipment, wherein, with the said image transitions of a plurality of power drives portion, the power supply of said power control part control stopping a part of power supply in said a plurality of power supply.
(9) the present invention also provides according to above-mentioned (7) or (8) described distance measuring equipment; Wherein, Also possess the clock supply unit, this clock supply unit provides the Action clock of said range finding element via said image transitions portion, when transferring to said energy-conservation mode from said mode commonly used; The power supply of the said clock supply unit of said power control part control stopping to make this clock supply unit stop to provide said Action clock.
(10) secondly, the present invention provides a kind of camera head, wherein possesses: image pickup optical system comprises: pick-up lens is used for making and forms images from the incident light of being taken the photograph body; And imaging apparatus is used to export and the corresponding image pickup signal of shot object image that forms images through said pick-up lens; Range-finding optical system comprises: anallatic lens is used for making and forms images from the incident light of being taken the photograph body; And the range finding element is used to export and the corresponding distance measuring signal of shot object image that forms images through said anallatic lens; Master control part is confirmed the range finding element and is taken the photograph the distance between the body according to said distance measuring signal, and calculates the amount of movement of said pick-up lens; And, focusing portion, the amount of movement that obtains according to aforementioned calculation moves said pick-up lens along optical axis direction, it is characterized in that, with any described distance measuring equipment in the invention described above (1)～(9) as said range-finding optical system.
(11) and then, the present invention provides a kind of distance-finding method that is used for distance measuring equipment, this distance measuring equipment can shift between mode commonly used and energy-conservation mode, comprising anallatic lens, is used for making and forms images from the incident light of being taken the photograph body; And; The range finding element; Be used to export and the corresponding distance measuring signal of shot object image that forms images through said anallatic lens, and can communicate by letter with main control unit, this main control unit is confirmed range finding element and the said distance of being taken the photograph between the body according to said distance measuring signal; And then also have image transitions portion and a power control part; This image transitions portion converts said distance measuring signal the signal of corresponding said main control unit interface shape to, and this power control part is used to control the power supply of said image transitions portion, and said distance-finding method is characterised in that; When transferring to said energy-conservation mode from said mode commonly used, carry out the step that control stops the power supply of a part of said image transitions portion through said power control part.
(12) the present invention also provides according to above-mentioned (11) described distance-finding method; Wherein, Said distance measuring equipment also possesses the clock supply unit; This clock supply unit provides the Action clock of said range finding element via said image transitions portion; When transferring to said energy-conservation mode from said mode commonly used, said distance-finding method comprises that also carrying out control through said power control part stops to carry out to the step of said clock supply unit power supply and through said clock supply unit the step that stops to provide said Action clock.
(13) moreover, the present invention provides a kind of image capture method that is used for camera head, this camera head comprises: pick-up lens is used for making and forms images from the incident light of being taken the photograph body; And imaging apparatus is used to export and the corresponding image pickup signal of shot object image that forms images through said pick-up lens; Range-finding optical system comprises: anallatic lens is used for making and forms images from the incident light of being taken the photograph body; And the range finding element is used to export and the corresponding distance measuring signal of shot object image that forms images through said anallatic lens; Master control part is confirmed the range finding element and is taken the photograph the distance between the body according to said distance measuring signal, and calculates the amount of movement of said pick-up lens; And, focusing portion, the amount of movement that obtains according to aforementioned calculation moves said pick-up lens along optical axis direction, and this camera head is characterised in that, adopts claim 11 or 12 described distance-finding methods to find range.
Effect of the present invention is following.Promptly, two range findings that phase method AF mode is used are transferred to energy-conservation mode with imaging apparatus, stop to import conversion interface circuit Action clock being provided between range finding is with imaging apparatus and main LSI, carrying out image that the image input changes not carrying out photograph processing etc. when not needing the AF action; And then; In a plurality of action powers, stop to supply with some specific action power, like this, even if under the situation that the startup of not carrying out based on each power supply sequential stops to control; Also can reduce control timing; Realize the toggle speed high speed, simplify circuit structure, and reduce electricity consumption.
Description of drawings
Fig. 1 is the stereographic map that an example shows camera head outward appearance of the present invention.
Fig. 2 is the functional block diagram of camera head shown in Figure 1.
Fig. 3 is the figure that is used to explain phase method AF mode principle.
Fig. 4 is that a routine camera head of the present invention is carried out the process flow diagram that AF handles.
Fig. 5 is the functional block diagram of a routine distance measuring equipment of the present invention.
Fig. 6 is the functional block diagram of distance measuring equipment inner structure shown in Figure 5.
Fig. 7 is that the example that distance measuring equipment shown in Figure 5 is carried out when transferring to energy-conservation mode moves processing flow chart.
Fig. 8 is that distance measuring equipment shown in Figure 5 moves processing flow chart in an example of when energy-conservation mode is returned, carrying out.
Fig. 9 is the routine sequential chart that distance measuring equipment shown in Figure 5 is carried out when transferring to energy-conservation mode.
Figure 10 is that distance measuring equipment shown in Figure 5 is at a routine sequential chart of when energy-conservation mode is returned, carrying out.
Figure 11 is the functional block diagram of another routine distance measuring equipment of the present invention.
Figure 12 is the functional block diagram of distance measuring equipment inner structure shown in Figure 11.
The explanation of mark:
10 master controllers, 121,122 range finding elements, 130 image transitions portions, 131CLK supply unit, 132 power control parts
Embodiment
Below the distance measuring equipment and the method that the present invention relates to based on description of drawings and possess the camera head of this distance measuring equipment and the embodiment of image capture method.Fig. 1 is the stereographic map of the camera head outward appearance that the present invention relates to of an example.The dead ahead of camera head 1 shown in Figure 1 is provided with image pickup optical system 20 and distance measuring equipment 100; These image pickup optical system 20 usefulness comprise focusing lens and obtain by subject image at interior pick-up lens, and this distance measuring equipment 100 possesses with anallatic lens 111 and 112 to be obtained by the range-finding optical system of subject image.Image pickup optical system 20 and distance measuring equipment 100 are set respectively.In addition, as shown in Figure 1, it is release key SW1 and being used to select the to photograph mode rotating disk SW2 of mode that the upper surface of camera head 1 is provided with shutter key.Release key SW1 inside is provided with two switches, sends first release signal during partly by release key SW1, sends second release signal when pressing release key SW1 fully.Camera head 1 is carried out AF according to these release signals and is handled.
Fig. 2 is the functional block diagram of the camera head that the present invention relates to of an example.Camera head 1 shown in Figure 1 comprises master control part 10, optical system 20, imaging apparatus 30, A/D change-over circuit 40, liquid crystal indicator (LCD) 50, optical system drive point road 60, memory circuit 70, external interface (I/F) 80 and distance measuring equipment 100.
Through optical system 20, on imaging apparatus 30, formed images by subject image.Imaging apparatus 30 is an electric signal with this image transitions.A/D change-over circuit 40 with imaging apparatus 30 output what constitute with electric signal (simulating signal) is digital signal by the subject image conversion of signals.
The Flame Image Process of being stipulated by the implementation of the digital signal of subject image after 40 conversions of 10 pairs of processes of master control part A/D change-over circuit, and be presented on the LCD50 as required.Optical system driving circuit 60 receives master control part 10 controls, drives optical system 20 with the adjustment of focusing along optical axis direction, promptly focuses on.
In addition, camera head 1 also has based on being resolved contrast by the subject image data and detecting the function of focusing state from imaging apparatus 30.Memory circuit 70 comprises RAM and ROM, wherein preserves from imaging apparatus 30 input and the intermediate data of action and control and treatment that receives the view data after master control part 10 is handled and relate to master control part 10 in interior deal with data etc. and then also preserve the view data of having taken.
The range finding element that master control part 10 is calculated with phase method AF mode according to distance measuring equipment and taken the photograph the distance between the body; Control optical system driving circuit 60; The pick-up lens that constitutes optical system 20 is moved to assigned position; Then, contrast-data is obtained and analyzed to the dollying camera lens in specialized range, realizes the AF function of hybrid mode.
Next explains the action of distance measuring equipment of the present invention.Fig. 3 is used to explain with phase method AF mode calculate the range finding element and taken the photograph the range measurement principle mode chart of distance between the body.Fig. 3 has only shown first anallatic lens 111 and second anallatic lens 112 and the first range finding element 121 and the second range finding element 122 in the distance measuring equipment 100.The first range finding element 121 and the second range finding element 122 are imaging apparatuss such as CCD, and its output is corresponding to the binary picture of taking the photograph the picture of body X with the quilt of first anallatic lens 111 and 112 imagings of second anallatic lens.Fig. 3 is the synoptic diagram when upper surface is observed camera head 1.
As shown in Figure 3, base length B representes the distance between first anallatic lens 111 and second anallatic lens 112, and fL representes the focal length of first anallatic lens 111, and fR representes the focal length of second anallatic lens 112.Fig. 3 mid-focal length fL and fR equate, therefore in following explanation, representes the focal length of first anallatic lens 111 and second anallatic lens 112 with f.At this; With base length B is benchmark; When the picture through the imaging on the first range finding element 121 of first anallatic lens 111 is dL at a distance of the distance of base length B; And when the distance of base length B is dR,, calculate and taken the photograph the distance between the body through following formula (1) with this base length B and image space dL and dR through the picture of second anallatic lens 112 imaging on the first range finding element 122.
Like this, be the dL and the dR of benchmark through measuring with base length B, just can calculate and taken the photograph the distance L between the body X.Then, need only just can convert overhang to reference to the adjustment coefficient of calculating in advance that is kept in the memory storage 70 corresponding to the pick-up lens of distance L.Consider the size of distance measuring equipment and keeping within bounds and model of range finding element, base length B need be more than 6mm.
Utilize the AF treatment scheme of carrying out in the camera head 1 of flowchart text present embodiment shown in Figure 4 below.The AF of present embodiment handles having carried out being used in contrast method AF mode of range finding back with phase method AF mode and carries out high-precision focusing position detection.
After partly sending first release signal by release key SW1, beginning AF handles, and control (S10) at first makes public.Secondly, carry out AF with phase method AF mode and handle (S20), then, judgement AF handles the result (S30) of (S20), if judge focusing failure (S30 denys), then carries out fail condition judgment processing (S70).In fail condition judgment processing (S70), carry out AF processing (S70 denys) once more when being judged as, then return S20.And in fail condition judgment processing (S70), judge when this processing finishes (S70 is), then in LCD50, show wrong (S90), end process.Show that about mistake for example ecbatic such as exhibit red frame zone is failure.
In judgment processing (S30), if judge and focus successfully (S30 is), then calculate with phase method AF mode apart from moving lens after this lens location around, carry out AF processing (S40) with contrast method AF mode.Then, judge the AF process result (S50) of carrying out with contrast method AF mode.If judge the focusing failure (S50 denys) that the AF of S40 handles, then carry out fail condition judgment processing (S80).In fail condition judgment processing (S80), handle (S80 denys) if judge the AF that carries out S40 once more, then return treatment S 40, and if judge that this processing finishes (S80 is), then demonstration wrong (S90) on LCD50, end process.The ecbatics such as zone that show available red block about mistake are failure.
In judgment processing (S50),, then on LCD50, successfully show (S60) if judgement is focused successfully (S50 is).About the ecbatics such as zone that successfully show the available green frame is successfully.
The demonstration of LCD50 in the mistake display process (S90) also can show with being different from above-mentioned color, in addition, except showing with color box, can also show or the show state etc. that changes zone marker is used to distinguish AF and handles the form that failure shows with flicker.
Embodiment below with reference to description of drawings distance measuring equipment of the present invention.
Fig. 5 is the module map of distance measuring equipment of the present invention.As shown in Figure 5, distance measuring equipment 100 comprises: first anallatic lens 111 and second anallatic lens 112 are used for making that the incident light from photography target forms images; The first range finding element 121 and the second range finding element 122 are established photo-electric conversion element through row and are constituted, savings and the corresponding electric charge of optical imagery in this photo-electric conversion element; Image transitions portion 130 carries out the drive controlling of each imaging apparatus, and the picture signal of imaging apparatus output is carried out conversion process, in order to output to master control part 10; CLK supply unit 131 provides the action reference clock via image transitions portion 130 to the first range finding element 121 and the second range finding element 122; And, power control part 132, according to the indication of master control part 10, control chart picture dress changes the electric power of portion 130 and CLK supply unit 131 and supplies with (being also referred to as power supply).
Below with reference to Fig. 6 the inner structure of one illustration as converter section 130 is described.Image transitions portion 130 indicates according to the action of master control part 10, and based on the action reference clock that CLK supply unit 131 provides, to the first range finding element 121 and the second range finding element 122 clock is provided.The first range finding element 121 with the second range finding element 122 during according to this clockwise image transitions portion 130 export the image of being taken the photograph figure X (referring to Fig. 3).The image of the first range finding element 121 and 122 outputs of the second range finding element is a distance measuring signal.The Video I/F that image transitions portion 130 usefulness are suitable for each range finding element most receives distance measuring signal.
In order to be sent to master control part 10 from the distance measuring signal of the first range finding element 121 and the second range finding element 122, image transitions portion 130 converts these distance measuring signals to the signal form of the Video I/F of corresponding master control part.Be sent to master control part through the signal after the conversion and be used for the parallax computing.Like this, after the regulation conversion process of distance measuring signal through 130 implementations of image transitions portion of the first range finding element 121 and second range finding element 122 output, just can be used for the focusing process that the master control part 10 of camera head 1 is carried out with phase method AF mode.
Image transitions portion 130 needs a plurality of action powers.For example, core power supply (1.2V), I/O power supply 1 (1.8V), PLL power supply (2.5V), I/O power supply 2 (3.1V).Fig. 6 omits and shows the connecting line that connects each power supply of distance measuring equipment 10 power supplies except a part.In a plurality of action powers, the PLL power supply as specific action power supply (below be called particular power source) (2.5V), its power supply receives power control part 132 controls, and this power control part 132 is according to master control part 10 indication actions.When this particular power source was stopped power supply, image transitions portion 130 moved to energy-conservation mode from mode commonly used, and this particular power source is when beginning to supply power, and 130 in image transitions portion returns mode commonly used from energy-conservation mode.
Along with the control of the action mode of image transitions portion 130, the first range finding element 121 and second is found range that element 122 is transferred to energy-conservation mode or is returned also from energy-conservation mode and is controlled.This particular power source still is the action power of CLK supply unit 131 simultaneously, and therefore, when moving to energy-conservation mode from using mode always, particular power source stopped to 131 power supplies of CLK supply unit in the moment of regulation.If stop the power supply of CLK supply unit 131, then image transitions portion 130 stops to supply with the action reference clock, stops to export the distance measuring signal from the first range finding element 121 and the second range finding element 122 for this reason.
Energy-conservation mode is meant that the particular power source of image transitions portion 130 and the particular power source of CLK supply unit 131 stop power supply, and makes image transitions portion 130 be in the state that stops to move.After particular power source was stopped power supply, CLK supply unit 131 stopped to image transitions portion 130 Action clock being provided.And after the CLK clock stopped to supply with, the internal circuit of image transitions portion 130 no longer moved, even if other power supplys such as core power supply, I/O power supply 1, I/O power supply 2 keep power supply for this reason, the consumption electric power of image transitions portion 130 also will drop to below 10 milliamperes.About 20 milliamperes electrostatic current takes place in the analog part of PLL, if with the PLL power supply as particular power source and stop the power supply of this PLL power supply, then can bring into play sizable energy-saving effect, reduce the electricity consumption of distance measuring equipment 100.Stop the energy-saving effect that the energy-conservation mode of particular power source power supply brings and be approximately 50mW.
In energy-conservation mode, only stop the power supply of particular power source and keep other power supplys to continue power supply, can also shorten the stand-by period of when energy-conservation mode is returned mode commonly used, waiting for each power initiation.
Also there are other embodiments in energy-conservation mode about in the camera head 1 of present embodiment.For example, when transferring to energy-conservation mode, stop the power supply of the particular power source of image transitions portion 130, and keep the particular power source of CLK supply unit 131 to continue power supply.At this moment; Stop to the first range finding element 121 and second find range element 122 wherein a side Action clock is provided; Make a wherein side of win the range finding element 121 and the second range finding element 122 stop to export distance measuring signal; And the opposing party continues to export distance measuring signal, reduces the electricity consumption of a range finding element thus.The distance measuring signal that continues the range finding element output of maintenance action is a picture signal of being taken the photograph body, and this picture signal is sent to master control part 10, is used for being shown to as the live view image LCD50 of camera head 1.
In this case, even if stop the action of the imaging apparatus 30 of distance measuring equipment 1, camera head 1 still can show the enforcement viewfinder image.And the electricity consumption of imaging apparatus 30 is greater than the electricity consumption of range finding element 121, stops the action of imaging apparatus 30 and only keeps the first range finding element 121 or second range finding element 122 action to implement viewfinder image in order to show, helps to reduce electricity consumption.
About the energy-conservation mode of the camera head 1 of present embodiment, other embodiments except that above-mentioned of can also further giving an example.For example, when transferring to energy-conservation mode, stop the power supply of the particular power source of image transitions portion 130, and keep the particular power source of CLK supply unit 131 to continue power supply, continuing provides Action clock to the first range finding element 121 or the second range finding element 122.Can also reduce this moment to be provided to the Action clock in the range finding element that keeps action, change, reduce the electricity consumption of the range finding element that real-time display image is provided from the output time of range finding element output image signal during unit interval.
So-called particular power source, in the specification of the IC that in other words promptly is meant at composing images converter section 130, the power supply that must can be switched on or switched off through switch perhaps refers to the power supply that power consumption is bigger.
Below with reference to the distance measuring equipment 100 of the flowchart text one routine present embodiment of figure 7 in the mobile processing when energy-conservation mode shifts.When energy-conservation mode shifts, at first, image transitions portion 130 is according to the indication of master control part 10, to the first range finding element 121 and the second range finding element, 122 output sleep signal (S101).Then, implementation etc. are pending, wait for that the first range finding element 121 and the second range finding element 122 move to dormancy and move the desired time (S102).After fully waiting for, master control part 10 is sent the indication (S103) that action stops to image transitions portion 130.Then, implementation etc. are pending, wait for that image transitions portion 130 stops to move the desired time (S104).After fully waiting for, master control part 10 is sent to CLK supply unit 131 and is stopped the indication (S105) to the 130 output action benchmark CLK of image transitions portion.Then, implementation etc. are pending, wait for that power control part 132 preparation CLK stop the desired time (S106).After fully waiting for, master control part 10 is sent indication to power control part 132, requires to stop output (S107) to the particular power source of image transitions portion 130 and 131 power supplies of CLK supply unit.
Through treatment step S101 to S107, distance measuring equipment 100 makes the range finding element 121 and second of the winning element 122 of finding range transfer to dormancy mode, then stops the Action clock of image transitions portion 130, the power supply of obsolete particular power source when stopping to handle in real time.Then, this energy-conservation mode remains to the startup indication of receiving master control part 10 always, require to move to need to carry out AF processing action mode till (A108 not).In the startup indication back (S108 is) of receiving master control part 10, distance measuring equipment 100 finishes energy-conservation mode to be handled, and returns conventional action mode from energy-conservation mode, promptly returns mode commonly used.
In the above-mentioned treatment S 101; The first range finding element 121 and second is found range after the dormancy mode indicator signal that element 122 receives that image transitions portion 130 sends according to the indication of master control part 10; Entering dormancy action; During this period, the first range finding element 121 and the second range finding element 122 can come output image with the speed that is lower than the image transfer rate in the mode commonly used.At this moment, though the amount of images that is sent to master control part 10 via image transitions portion 130 from the first range finding element 121 and the second range finding element 122 is lacked during than mode commonly used, can reduce by first the find range electricity consumption of element 122 of element 121 and second of finding range.
Below with reference to the control when energy-conservation mode is returned mode commonly used of the distance measuring equipment 100 of the flowchart text one routine present embodiment of Fig. 8.Camera head 1 is when carrying out the transfer of AF processing action mode, and master control part 10 is sent to image transitions portion 130 and started indication.Image transitions portion 130 begins to carry out transferring to from energy-conservation mode the mobile processing of mode commonly used after receiving the startup indication.
At first, master control part 10 is sent the indication that begins to export to power control part 132, requires the particular power source of image transitions portion 130 and CLK supply unit 131 to begin power supply (S201).After receiving the indication that begins to export, implementation etc. are pending, wait for that particular power source begins to image transitions portion 130 to be provided the desired time of electric power (S202).After fully waiting for, master control part 10 begins to the transmission of image transitions portion 130 transfer circuit information (S203).Then, image transitions portion 130 circuit information that expansion is received in inside is prepared in circuit, to move.It is pending that master control part 10 is carried out etc., wait until always receive prepare end signal till (S204 not).After action prepared to finish, image transitions portion 130 sent to master control part 10 and prepares end signal (S204 is).After master control part 10 is received and prepared end signal, begin indication (S205) to the 130 output action benchmark CLK of image transitions portion to 131 transmissions of CLK supply unit.Then carry out etc. pending, wait for CLK supply unit 131 can be stably to image transitions portion 130 provide CLK the adequate time (S206) that will pass through.After the process sufficient time, image transitions portion 130 carries out initial setting according to the indication of master control part 10 and handles (S207).
Then, master control part 10 is sent startup indication (S208) via image transitions portion 130 to the first range finding element 121 and the second range finding element 122.The first range finding element 121 and the second range finding element 122 are carried out initial setting and are handled (S209) after receiving the startup indication.Implementations then etc. are pending, and the wait first range finding element 121 and the second range finding element 122 are stablized the desired time of output image (S210).Confirming to handle through implementation after fully waiting for, confirming correctly to export the picture synchronization signal (S211) that comes from the first range finding element 121 and the second range finding element 122 with respect to the value of initial setting from master control part 10.This processing is carried out always repeatedly, till picture synchronization signal can be by correct output (S211 not).If correctly exported picture synchronization signal, then the startup processing of image transitions portion 130 finishes (S211 is).If the image transfer rate of the first range finding element 121 and the second range finding element 122 is set to lowlyer during energy-conservation mode, then should be in the initial setting in the treatment S 209 is handled the image transfer rate be set at the image transfer rate of using always in the mode.
Fig. 9 shows the routine sequential chart of distance measuring equipment 100 when energy-conservation mode moves.After master control part 10 detects and do not need AF processing action mode in the camera head 1, begin image transitions portion 130 is carried out the mobile processing of shifting to energy-conservation mode.
After the mobile processing of shifting to energy-conservation mode begins; Image transitions portion 130 accepts master control part 10 via SIO access internal register, and the reset signal (Video_RESET1 and Video_RESET2) that the first range finding element 121 and second is found range element 122 is made as invalid.Then, master control part 10 indicating image converter sections 130 are invalid with the CLK output EN signal (Video_MCLK_EN) of the first range finding element 121 and the second range finding element 122.When image transitions portion 130 detect Video_MCLK_EN invalid after, stop Action clock (Video_MCLK) being provided to the first range finding element 121 and second element 122 of finding range.Then, image transitions portion 130 accepts master control part 10 via SIO access internal register, and the first range finding element 121 is invalid with the mobile indicator signal (Video_STBY1 and Video_STBY2) that the second range finding element 122 moves to the mode of sleeping.Like this, the first range finding element 121 and the second range finding element 122 just move to sleep mode.Then, master control part 10 indicating image converter sections 130 are with the RESET invalidating signal, and image transitions portion 130 stops the action of inner main circuit.Then, CLK supply unit 131 will provide the EN invalidating signal of action benchmark CLK to image transitions portion 130 according to the indication of master control part 10, stop to image transitions portion 130 CLK being provided.Like this, image transitions portion 130 inner all circuit operations all stop.Then, power control part 132 is according to the indication of master control part 10, and it is invalid to stop to the indicator signal POWER25V_EN of the particular power source of image transitions portion 130 power supplies.Like this, image transitions portion 130 just to move to sleep state be energy-conservation mode.
The routine sequential chart that Figure 10 is a distance measuring equipment 100 when energy-conservation mode is returned mode commonly used.When camera head 1 carries out AF processing action mode when shifting to needs, master control part 10 is sent to image transitions portion 130 and is started indication.Image transitions portion 130 comes into effect the mobile processing of shifting to action mode commonly used from energy-conservation mode after receiving and starting indication.
After the mobile processing that mode commonly used moves transfer begins; Master control part 10 indication power control parts 132 will be indicated to image transitions portion 130 effective with the POWER25V_EN of the particular power source of CLK supply unit 131 power supplies, make particular power source begin 13 power supplies to image transitions portion.Because the power supply of beginning power supply needs certain hour, therefore need adequate time to wait for that particular power source begins power supply.After fully waiting for, carry out the transmission sequential of the image transitions portion 130 inner circuit informations that form.
Specific as follows, master control part 10 is effective with the nCONFIG signal, and after the nSTATUS signal that image transitions portion 130 is exported was effective, circuit information was sent to image transitions portion 130 from master control part 10.The serial communication to the particular port of image transitions portion 130 is used in the transmission of circuit information.
After all circuit informations were sent to image transitions portion 130, master control part 10 indicating image converter sections 130 were effective with the CONFIG_DONE signal, transmitted by normal thereby master control part 10 can detect circuit information.Notice master control part 10 circuit informations transmit finish after, image transitions portion 130 is to inner unfolding circuits information, will be used to notify user capture be possible state the INIT_DONE signal effective.
So, after the action of distance measuring equipment 100 begins, carry out the initialization process of the control register of image transitions portion 130, then, carry out the startup of the first range finding element 121 and the second range finding element 122 and handle.
Image transitions portion 130 accept master control part 10 via SIO access internal register after, with the dormancy indicator signal (Video_STBY1 and Video_STBY2) of the first range finding element 121 and the second range finding element 122 effectively.Thus, the first range finding element 121 and the second range finding element 122 are that energy-conservation mode is returned mode commonly used from dormancy mode.Then, it is effective that master control part 10 is exported the EN signal with CLK, image transitions portion 130 detect this signal effectively after, beginning provides Video_MCLK to the first range finding element 121 and second element 122 of finding range.
And then image transitions portion 130 accepts master control part 10 via SIO access internal register, and the dormancy indicator signal (Video_STBY1 and Video_STBY2) of the first range finding element 121 and the second range finding element 122 is effective.Then, master control part 10 is carried out the initial setting processing through image transitions portion 130 and via SIO interface (I/O) to the first range finding element 121 and the second range finding element 122, begins to obtain image.
After this; After waiting until that fully each range finding element is stablized output image; Image transitions portion 130 carries out and confirms to handle; Whether the affirmation first range finding element 121 and the second range finding element 122, then finish the startup of range finding processing 100 and handle if picture synchronization signal is normal with respect to the correct output image synchronizing signal of the numerical value of initial setting.
Below with another embodiment of description of drawings distance measuring equipment of the present invention.Figure 11 is the module map of the distance measuring equipment of present embodiment.In preamble illustrated example (referring to Fig. 5); Distance measuring equipment 100 possesses CLK supply unit 131 and power control part 132; CLK supply unit 131 is according to the indication of master control part 10; To image transitions portion 130 the action reference clock is provided, power control part 132 is according to the indication of master control part 10, stops to provide to image transitions portion 130 and CLK supply unit 131 power supply of the particular power source of action electric power.To this; The distance measuring equipment 100a of present embodiment is shown in figure 11; The master control part 10 of camera head 1a possesses power control part 132 and generates efferent 101 with CLK; This power control part 102 provides the action electric power from particular power source to image transitions portion 130, and this CLK generates efferent 101 and to image transitions portion 130 the action reference clock is provided.
Below with Figure 12 the inner structure of the image transitions portion 130 of one routine present embodiment is described.Image transitions portion 130 generates the action reference clock that efferent 102 provides based on the CLK of master control part 10, to the first range finding element 121 and the second range finding element 122 Action clock is provided.The first range finding element 121 and the second range finding element 122 are taken the photograph the image of body X (referring to Fig. 3) to 130 outputs of image transitions portion according to this Action clock.The distance measuring equipment 100a of present embodiment such as following moves to energy-conservation mode; Promptly, master control part 10 transfers to when not needing AF processing action mode when detecting imaging apparatus 1a; The image transitions portion 130 that this master control part 10 stops in distance measuring equipment 100a provides the Action clock that generates efferent 101 from CLK, and then power control part 102 stops to image transitions portion 130 the electric power supply from particular power source being provided.
On the other hand; When distance measuring equipment 100a when energy-conservation mode is returned action mode commonly used; The power control part 102 of master control part 10 begins from the power supply of particular power source to image transitions portion 130; Then, identical with distance measuring equipment 100 among the embodiment in the preamble, carry out the image transitions portion 130 inner circuit informations that form and transmit sequential.After transmitting the sequential normal termination, the CLK of master control part 10 generates efferent 101 to begin to image transitions portion 130 the action reference clock to be provided.After this, in subscriber's line circuit, begin action based on the circuit information of previous transmission.
So, after distance measuring equipment 100a begins action, carry out the initialization process of the control register of image transitions portion 130, then, carry out the startup of the first range finding element 121 and the second range finding element 122 and handle.Then, stablize output image when image transitions portion 130 confirms each range finding element, and the picture synchronization signal of the first range finding element 121 and second range finding element 122 output normally after, the startup processing end of distance measuring equipment 100a.
As stated; Camera head of the present invention photography beyond the mode, when not needing mode that AF handles, the range finding element in the distance measuring equipment that utilizes phase method AF mode is transferred to energy-conservation mode, and the main LSI through the action of control camera head; Stop to import the Action clock of the image transformation circuit of two images with phase method AF mode; And then the subtend image transformation circuit provides a plurality of power supplys of electric power, and the particular power source that stops wherein being supplied with action electric power; In order to reduce electricity consumption, shorten desired time of return when energy-conservation mode is returned simultaneously.
Especially through stopping particular power source action electric power is provided; No longer need carry out startup and termination based on the sequential of a plurality of power supplys; The high speed of desired bulk treatment when helping to shift mode is realized the simplification of electricity consumption minimizing, image transformation circuit designs simplification and control flow simultaneously.
Claims (13)
1. a distance measuring equipment can shift between mode commonly used and energy-conservation mode, it is characterized in that,
Comprise: first anallatic lens and second anallatic lens are used for making and form images from the incident light of being taken the photograph body; And; The first range finding element and the second range finding element; Be respectively applied for output first distance measuring signal and second distance measuring signal; This first distance measuring signal is with corresponding through the shot object image of said first anallatic lens imaging, and this second distance measuring signal is with corresponding through the shot object image of said second anallatic lens imaging
And can communicate by letter with main control unit; This main control unit is according to said first distance measuring signal and said second distance measuring signal; Come to confirm respectively said first range finding element and said distance and said second range finding element and the said distance of being taken the photograph between the body of being taken the photograph between the body
And then have image transitions portion and a power control part, this image transitions portion converts said first distance measuring signal and said second distance measuring signal signal of corresponding said main control unit interface shape to,
This power control part is used to control the power supply of said image transitions portion,
When transferring to said energy-conservation mode from said mode commonly used, said power control part control stops the power supply to said image transitions portion.
2. distance measuring equipment according to claim 1, wherein, with the said image transitions of a plurality of power drives portion, the power supply of said power control part control stopping a part of power supply in said a plurality of power supply.
3. distance measuring equipment according to claim 1 and 2, wherein,
Also possess the clock supply unit, this clock supply unit provides the Action clock of said first range finding element and the said second range finding element via said image transitions portion,
When changing said energy-conservation mode over to from said mode commonly used, said power control part control stops to make this clock supply unit stop to provide said Action clock to said clock supply unit power supply.
4. distance measuring equipment according to claim 1 and 2, wherein,
Also possess the clock supply unit, this clock supply unit provides the Action clock of said first range finding element and the said second range finding element via said image transitions portion,
When changing said energy-conservation mode over to from said mode commonly used, said clock supply unit control stops that one of them provides Action clock to the said first range finding element and the said second range finding element.
5. distance measuring equipment according to claim 4; Wherein, Said main control unit connects display, on this display, show with said first range finding element and the said second range finding element in be not stopped the corresponding image of distance measuring signal of the range finding element output that said Action clock supplies with.
6. distance measuring equipment according to claim 1 wherein, can change said first range finding element and the said second range finding element are exported said distance measuring signal in the unit interval output time.
7. a distance measuring equipment can shift between mode commonly used and energy-conservation mode, it is characterized in that,
Comprise: anallatic lens is used for making and forms images from the incident light of being taken the photograph body; And the range finding element is used to export and the corresponding distance measuring signal of shot object image that forms images through said anallatic lens,
And can communicate by letter with main control unit, this main control unit is confirmed said range finding element and the said distance of being taken the photograph between the body according to said distance measuring signal,
And then also have image transitions portion and a power control part, and this image transitions portion converts said distance measuring signal the signal of corresponding said main control unit interface shape to, and this power control part is used to control the power supply of said image transitions portion,
When transferring to said energy-conservation mode from said mode commonly used, said power control part control stops the power supply of a part of said image transitions portion.
8. distance measuring equipment according to claim 7, wherein, with the said image transitions of a plurality of power drives portion, the power supply of said power control part control stopping a part of power supply in said a plurality of power supply.
9. according to claim 7 or 8 described distance measuring equipments, wherein,
Also possess the clock supply unit, this clock supply unit provides the Action clock of said range finding element via said image transitions portion,
When transferring to said energy-conservation mode from said mode commonly used, the power supply of the said clock supply unit of said power control part control stopping to make this clock supply unit stop to provide said Action clock.
10. camera head wherein possesses:
Image pickup optical system comprises: pick-up lens is used for making and forms images from the incident light of being taken the photograph body; And imaging apparatus is used to export and the corresponding image pickup signal of shot object image that forms images through said pick-up lens;
Range-finding optical system comprises: anallatic lens is used for making and forms images from the incident light of being taken the photograph body; And the range finding element is used to export and the corresponding distance measuring signal of shot object image that forms images through said anallatic lens;
Master control part is confirmed the range finding element and is taken the photograph the distance between the body according to said distance measuring signal, and calculates the amount of movement of said pick-up lens; And,
Focusing portion, the amount of movement that obtains according to aforementioned calculation moves said pick-up lens along optical axis direction,
It is characterized in that, with any described distance measuring equipment in the claim 1～9 as said range-finding optical system.
11. a distance-finding method that is used for distance measuring equipment, this distance measuring equipment can shift between mode commonly used and energy-conservation mode, comprising: anallatic lens is used for making and forms images from the incident light of being taken the photograph body; And; The range finding element; Be used to export and the corresponding distance measuring signal of shot object image that forms images through said anallatic lens, and can communicate by letter with main control unit, this main control unit is confirmed range finding element and the said distance of being taken the photograph between the body according to said distance measuring signal; And then also have image transitions portion and a power control part; This image transitions portion converts said distance measuring signal the signal of corresponding said main control unit interface shape to, and this power control part is used to control the power supply of said image transitions portion
Said distance-finding method is characterised in that, when transferring to said energy-conservation mode from said mode commonly used, carries out the step that control stops the power supply of a part of said image transitions portion through said power control part.
12. distance-finding method according to claim 11, wherein,
Said distance measuring equipment also possesses the clock supply unit, and this clock supply unit provides the Action clock of said range finding element via said image transitions portion,
When transferring to said energy-conservation mode from said mode commonly used, said distance-finding method comprises that also carrying out control through said power control part stops to carry out to the step of said clock supply unit power supply and through said clock supply unit the step that stops to provide said Action clock.
13. an image capture method that is used for camera head, this camera head comprises: pick-up lens is used for making and forms images from the incident light of being taken the photograph body; And imaging apparatus is used to export and the corresponding image pickup signal of shot object image that forms images through said pick-up lens; Range-finding optical system comprises: anallatic lens is used for making and forms images from the incident light of being taken the photograph body; And the range finding element is used to export and the corresponding distance measuring signal of shot object image that forms images through said anallatic lens; Master control part is confirmed the range finding element and is taken the photograph the distance between the body according to said distance measuring signal, and calculates the amount of movement of said pick-up lens; And, focusing portion, the amount of movement that obtains according to aforementioned calculation moves said pick-up lens along optical axis direction,
This camera head is characterised in that, adopts claim 11 or 12 described distance-finding methods to find range.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011026319A JP2012163923A (en) | 2011-02-09 | 2011-02-09 | Range finder, method, and program, and imaging apparatus, method, and program |
| JP2011-026319 | 2011-02-09 |
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| Publication Number | Publication Date |
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| CN102636934A true CN102636934A (en) | 2012-08-15 |
| CN102636934B CN102636934B (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210023037.7A Expired - Fee Related CN102636934B (en) | 2011-02-09 | 2012-02-02 | Distance measuring device, distance measuring method, photographing device and photographing method |
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| JP5911445B2 (en) * | 2013-03-19 | 2016-04-27 | キヤノン株式会社 | Imaging apparatus and control method thereof |
| WO2018220940A1 (en) * | 2017-05-31 | 2018-12-06 | オリンパス株式会社 | Image capture device |
| JP7353924B2 (en) | 2019-11-08 | 2023-10-02 | キヤノン株式会社 | Image processing device, imaging device, image processing method, and program |
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| CN102636934B (en) | 2015-06-24 |
| JP2012163923A (en) | 2012-08-30 |
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