CN103581564B - The aperture control system of camera head and method thereof - Google Patents
The aperture control system of camera head and method thereof Download PDFInfo
- Publication number
- CN103581564B CN103581564B CN201210281079.0A CN201210281079A CN103581564B CN 103581564 B CN103581564 B CN 103581564B CN 201210281079 A CN201210281079 A CN 201210281079A CN 103581564 B CN103581564 B CN 103581564B
- Authority
- CN
- China
- Prior art keywords
- image
- circle
- value
- image processor
- block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Closed-Circuit Television Systems (AREA)
- Exposure Control For Cameras (AREA)
- Studio Devices (AREA)
Abstract
The present invention discloses a kind of aperture control system and the method thereof of camera head, the automatic lens that can be precisely controlled aperture switch size is mainly used to control to the image statistics analysis arranging in pairs or groups suitable and feedback, enable and be dynamically controlled aperture size and allocate suitable image processing, such as aperture time (Shutter Time) and automatic growth control (AGC) etc., allow circle (Iris Lens) that optical characteristics preferably position can be parked in, can be used for the environment of low-light (level) or high light simultaneously, reach suitable light filling effect.
Description
Technical field
The present invention is the aperture control system about a kind of camera head and method thereof, espespecially a kind of energy is efficient carry out image analysing computer, and can by cross bright light source be considered as noise and by filter, make circle (IrisLens) that optical characteristics preferably position can be parked in, and there is the compensating actions such as high light, front light or backlight, and it is applicable to camera, monitor, camera or similar camera head.
Background technology
The resolution of the optical lens (Lens) for shooting with video-corder image is more and more higher in recent years, therefore in addition to the high-res of optical lens (Lens), its image quality also requires that more and more higher, is the most no matter close-perspective recording or remote its image that is intended to when clapping can see clearly and understands Chu.
But, the most conventional optical lens (Lens) has fixed camera lens (FixLens), manual camera lens (ManualLens) or automatic lens (Audioiris:DC iris or Video Iris) etc., the use that the control person of having that zooms in or out for aperture is different limits, and therefore cannot be accurately controlled out good image quality.
Therefore, the present inventor is in view of above-mentioned disappearance, phase can propose precisely to adjust to optimum state to carry out aperture control system and the method thereof of the camera head that image is shot with video-corder, to reduce the burden of hardware, camera head is allowed to run the most smooth, it is to grind with great concentration think of, design team's system, to provide consuming public to use.
Summary of the invention
nullThe main object of the present invention is providing aperture control system and the method thereof of a kind of camera head，By this static image is carried out image analysing computer，To obtain bright spot brightness、Mean flow rate and the information of luma blocks distribution，Further according to according to image analysing computer step、Obtain image processor (ISP) information Step and acquirement circle (Iris Lens) information and position step comprehensively carries out judging whether brightness is overexposure、Cross bright or the darkest，And by cross bright light source be considered as noise and by filter，When judging overexposure、Cross bright or cross the darkest time，The control controlling adjustment or motor drive circuit i.e. carrying out image processor (ISP) by controlling logical order adjusts，Allow circle (IrisLens) that optical characteristics preferably position can be parked in，Can be used for the environment of low-light (level) or high light simultaneously，Reach suitable light filling effect，And then increase overall practicality and superiority.
nullA time purpose of the present invention is to provide aperture control system and the method thereof of a kind of camera head，It is to include a circle (Iris Lens)、One motor drive circuit、One CIS、One image processor (ISP) and the design of a movement controller，Movement controller is allowed to be connected with image processor (ISP) and motor drive circuit，So that the optical information in circle (Iris Lens) and motor position can be obtained，And be provided with image analysis program in this movement controller and control logical order，By image analysis program, the image of CIS is carried out image analysing computer，And judge that image brilliance is the most suitable according to image analysing computer result，And it is considered as noise to filter by crossing bright light source，The control controlling adjustment and motor drive circuit carrying out image processor (ISP) again by controlling logical order adjusts，Circle (Iris Lens) and image processor (ISP) can precisely be adjusted to optimum state to carry out the effect that image is shot with video-corder，And then increase overall operability and stability.
In order to achieve the above object, the aperture control system of camera head of the present invention and method thereof its have main steps that and include: image is shot with video-corder: this circle (Iris Lens) uses motor to drive, and motor is to be driven with motor drive circuit, and shoots with video-corder image with circle (Iris Lens) and be transferred in CIS；Obtain an image: this CIS connects to image processor (ISP), and image processor (ISP) is connected with movement controller again, and be provided with image analysis program in this movement controller and control logical order, and image analysis program is to capture a static image from CIS；Acquirement image processor (ISP) information: and movement controller obtains the information in image processor (ISP) in image processor (ISP)；Acquirement circle (Iris Lens) information and position: and movement controller obtains optical information and the motor position of circle (Iris Lens) in circle (Iris Lens)；Image analysing computer: i.e. this static image is carried out image analysing computer after capturing a static image from CIS, to obtain bright spot brightness, mean flow rate and the information of luma blocks distribution；Judge that image brilliance is the most suitable: comprehensively carry out judging whether brightness is overexposure, it is bright or the darkest to cross according to above-mentioned image analysing computer step, acquirement image processor (ISP) information Step and acquirement circle (Iris Lens) information and position step；And circle (Iris Lens) action: when via above-mentioned judge image brilliance whether appropriate step judge overexposure, cross the brightest or when crossing the darkest, the control controlling adjustment or motor drive circuit i.e. carrying out image processor (ISP) by controlling logical order adjusts, and circle (Iris Lens) and image processor (ISP) can precisely be adjusted and shoots with video-corder to optimum state to carry out image.
Other features of the present invention and specific embodiment, can further appreciate that in the detailed description with following cooperation accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the key step schematic flow sheet of the present invention；
Fig. 2 is the schematic flow sheet of bright spot brightness steps of the present invention；
Fig. 3 is the mean flow rate steps flow chart schematic diagram of the present invention；
Fig. 4 be the present invention determine whether overexposure block steps flow chart schematic diagram；
Fig. 5 is the control system configuration diagram of the present invention.
Description of reference numerals: 10-circle (Iris Lens)；20-motor drive circuit；30-CIS (Image Sensor)；40-image processor (ISP)；50-movement controller (controller)；51-image analysis program；52-controls logical order；Step S100-image is shot with video-corder；Step S110-obtains an image；Step S120-obtains image processor (ISP) information；Step S130-obtains circle (Iris Lens) information and position；The image analysing computer of step S140-；The bright spot brightness of step S141-；Step S1411-obtains gray level information；Step S1412-is added up；Step S1413-searches bright spot；Step S1414-carries out the judgement of marginal value；Step S142-mean flow rate；Step S1421-obtains gray level information；Step S1422-adds up grey decision-making；Step S1423-is averaged brightness；Step S150-judges that image brilliance is the most suitable；Step S151-obtains gray level information；Whether the comparison of step S152-is more than marginal value；Step S153-is added up；Step S154-determines whether overexposure block；Step S160-circle (Iris Lens) action.
Detailed description of the invention
Refer to shown in Fig. 1～5, for the aperture control system of camera head of the present invention and the method flow schematic diagram of method thereof and configuration diagram.And the control method key step of the present invention includes:
Step S100 image is shot with video-corder: this circle (Iris Lens) 10 is to use motor to drive, and motor is to be driven with motor drive circuit 20, and shoots with video-corder image with circle (Iris Lens) 10 and be transferred in CIS 30；
Step S110 obtains an image: this CIS 30 is coupled to image processor (ISP) 40, and image processor (ISP) 40 is connected with movement controller 50 again, and be provided with image analysis program 51 in this movement controller 50 and control logical order 52, and image analysis program 51 is to capture a static image from CIS 30；
Step S120 acquirement image processor (ISP) information: and movement controller 50 obtains the information in image processor (ISP) 40 in image processor (ISP) 40；
Step S130 acquirement circle (Iris Lens) information and position: and movement controller 50 obtains optical information and the motor position of circle (Iris Lens) 10 in circle (Iris Lens) 10；
Step S140 image analysing computer: i.e. this static image is carried out image analysing computer after capturing a static image from CIS 30, with the information of the bright spot brightness of acquisition step S141, step S142 mean flow rate and luma blocks distribution；
Step S150 judges that image brilliance is the most suitable: obtain image processor (ISP) information Step according to above-mentioned step S140 image analysing computer step, step S120 and step S130 obtains circle (Iris Lens) information and position step comprehensively carries out judging whether brightness is overexposure, it is bright or the darkest to cross；And
Step S160 circle (Iris Lens) action: when via above-mentioned steps S150 judge image brilliance whether appropriate step judge overexposure, cross the brightest or when crossing the darkest, the control controlling adjustment or motor drive circuit 20 i.e. carrying out image processor (ISP) 40 by controlling logical order 52 adjusts, and circle (Iris Lens) 10 and image processor (ISP) 40 can precisely be adjusted and shoots with video-corder to optimum state to carry out image.
This control system of the another present invention includes: a circle (Iris Lens) 10, and this circle 10 is to use motor to drive；One motor drive circuit 20, this motor drive circuit 20 is to be connected to drive motor with circle (Iris Lens) 10；One CIS 30, this CIS 30 is to be connected with circle 10, can shoot with video-corder image；One image processor (ISP) 40, this image processor (ISP) 40 is to be connected with CIS 30；nullAnd a movement controller 50，This movement controller 50 is to be connected with image processor (ISP) 40 and motor drive circuit 20，So that the optical information in circle (Iris Lens) 10 and motor position can be obtained，And be provided with image analysis program 51 in this movement controller 50 and control logical order 52，By image analysis program 51, the image of CIS 30 is carried out image analysing computer，And judge that image brilliance is the most suitable according to image analysing computer result，And it is considered as noise to filter by crossing bright light source，The control controlling adjustment and motor drive circuit 20 carrying out image processor (ISP) 40 again by controlling logical order 52 adjusts，Circle (Iris Lens) 10 and image processor (ISP) 40 can precisely be adjusted shoot with video-corder to optimum state to carry out image.
Wherein in this step S140 image analysing computer, the bright spot brightness of step S141 is to be further provided with the following step: step S1411 obtains gray level information: carries out capturing Y value in image to show its grey decision-making, and cuts into multiple sub-block；Step S1412 is added up: the grey decision-making of sub-block is divided into multiple GTG interval, then the sum of all pixels (N) that each GTG is interval in adding up sub-block；Step S1413 searches bright spot: search bright spot to the GTG interval that grey decision-making is smaller；And step S1414 carries out the judgement of marginal value: carry out judging that whether the sum of all pixels (N1) in this GTG interval is more than marginal value (Th1), when sum of all pixels (N1) is bright spot more than marginal value (Th1), if sum of all pixels (N1) is less than marginal value (Th1), returns to previous step and search bright spot and again search；Step S142 mean flow rate in this step S140 image analysing computer another is to be further provided with the following step: step S1421 obtains gray level information: carry out capturing Y value to show its grey decision-making in image；Step S1422 adds up grey decision-making: adds up the grey decision-making of each pixel in image and makes it be X；And step S1423 is averaged brightness: totalling grey decision-making X is i.e. obtained mean flow rate divided by sum of all pixels in image；This step S150 another judges that the overexposure during image brilliance is the most suitably is to be further provided with the following step: step S151 obtains gray level information: carries out acquisition Y value in image to show its grey decision-making, and cuts into multiple sub-block；Whether the comparison of step S152 more than marginal value: the average gray-scale value of this sub-block deducts overall picture average gray-scale value and judges whether more than marginal value (Th2), if more than during marginal value (Th2) will this sub-block to be considered as noise block the most taken into consideration；Step S153 is added up: if comparison is less than marginal value (Th2), then add up this sub-block its grey decision-making interior sum of all pixels (N2) more than marginal value (Th3)；And step S154 determines whether overexposure block: when sum of all pixels (N2) is more than marginal value (Th4), this sub-block is then overexposure block, and when sum of all pixels (N2) is less than marginal value (Th4), this sub-block is then non-overexposure block；nullAnother this step S160 circle (Iris Lens) action is to be set to further when judging that image brilliance is inappropriate，Automatic exposure (AE) and automatic growth control (AGC) ultimate value of the automatic mode (AUTO Mode) of image processor (ISP) 40 is i.e. adjusted by the control logical order 52 of movement controller 50，And be confirmed whether to minimize the limit (MIN Value) or the state of maximum limit (MAX Value)，When in ultimate value, its automatic mode (AUTO Mode) keeps circle (Iris Lens) 10 on a predetermined position，And when reaching the limit values and can adjust, revise automatic exposure (AE) and automatic growth control (AGC) the range relevant parameter of automatic mode (AUTO Mode)，So that image brilliance can be suitably；Another this automatic mode (AUTO Mode) is further up to ultimate value and when cannot adjust, MANUAL CONTROL mode will be switched to by automatic mode (AUTO Mode), can change the state that is turned on and off of circle (Iris Lens) 10, and Non-follow control aperture time (Shutter Time) and yield value (Gain Value) determine motor translational speed and prevent circle (Iris Lens) 10 from shaking.
Refer to shown in Fig. 1～5, for the aperture control system of camera head of the present invention and the method flow schematic diagram of method thereof and configuration diagram.Optimal performance of the present invention principle system is to apply in the circle (Iris Lens) 10 using motor, aperture size is controlled exactly by the way of with program, enable is parked in image quality preferably position, and can suitably carry out zooming in or out of circle (Iris Lens) 10 according to the change of environment light source, and the statistical analysis of collocation image data is to optimize Light Source Compensation mechanism；nullTherefore，The aperture control system (as shown in the 5th) of the present invention includes a circle (Iris Lens) 10、One motor drive circuit 20、One CIS 30、And an image processor (ISP) 40、The design of one movement controller 50，Wherein this circle (Iris Lens) 10 is to use motor to drive，And this motor is to adopt stepping to reach、D.c. motor or the motor of other energy transmission，And this circle (Iris Lens) 10 connects motor drive circuit 20 can drive motor action，And it is provided with control IC in motor drive circuit 20 with the action that can be finely adjusted accurately，Or motor in other ways drives and is used for confirming aperture position plus other original paper，Such as d.c. motor adds optical ruler or encoder etc.，Another this circle (Iris Lens) 10 also connects CIS (Image Sensor) 30(such as CCD Sensor or CMOS Sensor) so that image can be shot with video-corder，And this CIS (Image Sensor) 30 is the digital voltage signal (i.e. optical signal transfers the signal of telecommunication to) that the power according to circle (Iris Lens) 10 brightness of image transmitted is changed into CIS (Image Sensor) 30，This CIS another is connected with image processor (ISP) 40，Together with designing together with wherein this image processor (ISP) 40 also can design with CIS 30 or with movement controller 50，So that image can be restored under different optical conditions the on-the-spot details shot with video-corder，Wherein this image processor (ISP) 40 major function has AWB (AWB)、Automatic exposure (AE) and automatically focusing (AF)，To adjust the size of circle (Iris Lens) 10 and to change into light quantity，And the aperture time (Shutter Time) of CIS 30 and image processor (ISP) 40 and yield value (Gain Value) also can adjust，Furthermore，This image processor (ISP) 40 and motor drive circuit 20 are all connected with a movement controller (controller) 50，So that the optical information in circle (Iris Lens) 10 and motor position can be obtained，And be provided with image analysis program 51 in this movement controller 50 and control logical order 52，Make this image analysis program 51 image of CIS (Image Sensor) 30 can be carried out image analysing computer，Wherein this image analysing computer is for obtaining bright spot brightness、Mean flow rate and the information of luma blocks distribution，And according to above-mentioned image analysing computer、Obtain image processor (ISP) 40 information and acquirement circle (Iris Lens) 10 information and position comprehensively carries out judging that image brilliance is the most suitable，And it is considered as noise to filter by crossing bright light source，When judging that image brilliance the most suitably judges overexposure via above-mentioned、Cross bright or cross the darkest time，The control controlling adjustment or motor drive circuit 20 i.e. carrying out image processor (ISP) 40 by controlling logical order 52 adjusts，Circle (Iris Lens) 10 and image processor (ISP) 40 can precisely be adjusted shoot with video-corder to optimum state to carry out image，Wherein the image analysing computer result in this movement controller 50 is the automatic exposure (AE) of automatic mode (AUTO Mode) and automatic growth control (AGC) ultimate value judging when image brilliance is inappropriate to be adjusted further image processor (ISP) 40 by the control logical order 52 of movement controller 50，And be confirmed whether to minimize the limit (MIN Value) or the state of maximum limit (MAX Value)，When in ultimate value, its automatic mode (AUTO Mode) keeps circle (Iris Lens) 10 on a predetermined position，And when reaching the limit values and can adjust, revise automatic exposure (AE) and automatic growth control (AGC) the range relevant parameter of automatic mode (AUTO Mode)，So that image brilliance can be suitably，When another this automatic mode (AUTO Mode) is further up to ultimate value and cannot adjust，MANUAL CONTROL mode will be switched to by automatic mode (AUTO Mode)，It is turned on and off state with can change circle (Iris Lens) 10，And Non-follow control aperture time (Shutter Time) and yield value (Gain Value) determine motor translational speed and prevent circle (Iris Lens) 10 from shaking.
Separately can carry out image analysing computer efficiently by the diaphragm control method (as shown in Figure 1) of the present invention, and do the image processing such as denoising simultaneously, to reach the compensating actions such as high light, front light, backlight, first carry out step S100 image to shoot with video-corder: this circle (Iris Lens) 10 is to use motor to drive, and motor is to be driven with motor drive circuit, and shoots with video-corder image with circle (Iris Lens) 10 and be transferred in CIS 30；Wherein this CIS (Image Sensor) 30 can be changed into the digital voltage signal (i.e. optical signal transfers the signal of telecommunication to) of CIS (Image Sensor) 30 according to the power of circle (Iris Lens) 10 brightness of image transmitted, and completes to carry out after step S100 image is shot with video-corder next step again.
Next step is that step S110 obtains an image: this CIS (Image Sensor) 30 is connected to image processor (ISP) 40, and image processor (ISP) 40 is connected with movement controller (controller) 50 again, and be provided with image analysis program 51 in this movement controller (contr oller) 50 and control logical order 52, and image analysis program 51 is to capture a static image from CIS 30, thus, allow image analysis program 51 can proceed by subsequent analysis flow process, and complete to enter back in next step after step S110 obtains an image.
Next step is this step S120 acquirement image processor (ISP) information: and movement controller 50 obtains the information in image processor (ISP) 40 in image processor (ISP) 40；Thus, image is allowed to restore the on-the-spot details shot with video-corder under different optical conditions, wherein this image processor (ISP) 40 major function has AWB (AWB), automatic exposure (AE) and automatically focusing (AF), so that the adjustment of the aperture time (Shutter Time) of circle (Iris Lens) 10 can be carried out, separately can be when being analyzed flow process, it is provided that the size of circle (Iris Lens) 10 when this static image is shot with video-corder, the aperture time (Shutter Time) of CIS and the numerical value of image processor (ISP) yield value (Gain Value) are for judging, and complete to carry out next step again after step S120 obtains image processor (ISP) information.
Next step is this step S130 acquirement circle (Iris Lens) information and position: and movement controller 50 obtains optical information and the motor position of circle (Iris Lens) in circle (Iris Lens) 10；Thus, can be when being analyzed flow process, it is provided that the optical information such as modulation transfer function (MTF) and the depth of field (DOF) of circle (Iris Lens) 10 when this static image is shot with video-corder and the relativeness of present motor position, the brightness value also having aperture target location expected from user and user expection to reach provides judgement to use, and completes to carry out next step again after step S130 obtains circle (Iris Lens) information and position.
Next step is this step S140 image analysing computer: i.e. this static image is carried out image analysing computer after capturing a static image from CIS 30, with the information of the bright spot brightness of acquisition step S141, step S142 mean flow rate and luma blocks distribution；Thus, the S140 image analysing computer of this step is mainly by the idea of variance, namely in group, data distributed state is statistical number, that is it is used for representing the index of individual difference size, in brief, if the value of monomer is different with ensemble average value difference the biggest, the probability being then noise is the highest, therefore, the S140 image analysing computer of this step be utilize a kind of can by cross bright light source be considered as noise and by filter at algorithm, wherein the bright spot brightness (as shown in Figure 2) of step S141 in this step S140 image analysing computer contains the following step can obtain bright spot monochrome information, first carry out step S1411 and obtain gray level information: carry out capturing Y value to show its grey decision-making in image, and cut into multiple sub-block；Carry out step S1412 again to add up: the grey decision-making of sub-block is divided into multiple GTG interval, then the sum of all pixels (N) that each GTG is interval in adding up sub-block；Carry out step S1413 search bright spot again: search bright spot to the GTG interval that grey decision-making is smaller；And step S1414 carries out the judgement of marginal value: carry out judging that whether the sum of all pixels (N1) in this GTG interval is more than marginal value (Th1), when sum of all pixels (N1) is bright spot more than marginal value (Th1), if sum of all pixels (N1) is less than marginal value (Th1), returns to previous step S1413 and search bright spot and again search；This step S142 mean flow rate another contains the following step (as shown in Figure 3), first step S1421 and obtains gray level information: carry out capturing Y value to show its grey decision-making in image；Carry out step S1422 again and add up grey decision-making: add up the grey decision-making of each pixel in image and make it be X；And step S1423 is averaged brightness: totalling grey decision-making X is i.e. obtained mean flow rate divided by sum of all pixels in image；Thus, next step is carried out after completing step S140 image analysing computer result again.
Next step is that this step S150 judges that image brilliance is the most suitable: obtain image processor (ISP) information according to above-mentioned step S140 image analysing computer, step S120 and step S130 obtains circle (Iris Lens) information and position comprehensively carries out judging whether brightness is overexposure, it is bright or the darkest to cross；Thus, can comprehensive descision brightness be whether overexposure, cross the brightest or the darkest, so that follow-up adjustment action can be carried out, the following step (as shown in Figure 4) is contained further in overexposure system during wherein this step S150 judges brightness the most suitably, step S151 obtains gray level information: carries out capturing Y value in image to show its grey decision-making, and cuts into multiple sub-block；Carry out the comparison of step S152 more whether more than marginal value: the average gray-scale value of this sub-block deducts overall picture average gray-scale value and judges whether more than marginal value (Th2), if more than during marginal value (Th2) will this sub-block to be considered as noise block the most taken into consideration；Carry out step S153 again to add up: if comparison is less than marginal value (Th2), then add up this sub-block its grey decision-making interior sum of all pixels (N2) more than marginal value (Th3)；And step S154 determines whether overexposure block: when sum of all pixels (N2) is more than marginal value (Th4), this sub-block is then overexposure block, and when sum of all pixels (N2) is less than marginal value (Th4), this sub-block is then non-overexposure block；It is considered as noise block and does not arrange consideration so that the sub-block of marginal value can be will be greater than, remaining carries out this sub-block again and is judged as overexposure block or non-overexposure block, so that follow-up adjustment action can be carried out, and complete step S150 and judge to carry out next step again after image brilliance is the most suitably.
Next step is this step S160 circle (Iris Lens) action: when judging that via above-mentioned steps S150 image brilliance judges overexposure in the most suitable, the brightest or mistake is the darkest, the control controlling adjustment or motor drive circuit 20 i.e. carrying out image processor (ISP) 40 by controlling logical order 52 adjusts, and circle (Iris Lens) 10 and image processor (ISP) 40 can precisely be adjusted and shoots with video-corder to optimum state to carry out image；Thus, when judging that image brilliance is inappropriate, automatic exposure (AE) and automatic growth control (AGC) ultimate value of the automatic mode (AUTO Mode) of image processor (ISP) 40 is i.e. adjusted by the control logical order 52 of movement controller 50, and be confirmed whether to minimize the limit (MIN Value) or the state of maximum limit (MAX Value), when in ultimate value, its automatic mode (AUTO Mode) keeps circle (Iris Lens) 10 on a predetermined position, and when reaching the limit values and can adjust, revise automatic exposure (AE) and automatic growth control (AGC) the range relevant parameter of automatic mode (AUTO Mode), so that image brilliance can be suitably；nullWhen another this automatic mode (AUTO Mode) is further up to ultimate value and cannot adjust，MANUAL CONTROL mode will be switched to by automatic mode (AUTO Mode)，It is turned on and off state with can change circle (Iris Lens) 10，And Non-follow control aperture time (Shutter Time) and yield value (Gain Value) determine motor translational speed and prevent circle (Iris Lens) 10 from shaking，Therefore，No matter image brilliance is overexposure、Cross bright or the darkest，All can pass through movement controller (controller) 50 to start and image processor (ISP) 40 carries out aperture time (Shutter Time) and yield value (Gain Value) adjust，Or startup motor drive circuit 20 carries out the adjustment of speed speed to motor，Circle (Iris Lens) 10 can precisely be adjusted shoot with video-corder to optimum state to carry out image.
As known from the above, the aperture control system of the camera head of the present invention and method thereof, have the advantage that
1, circle (Iris Lens) can be manipulated exactly zoom in or out, be parked in image quality better position.
2, coordinate the change of environment light source, can in time adjust circle (Iris Lens) and zoom in or out.
3, by image data statistical analysis, enable and optimize Light Source Compensation mechanism person.
By detailed description above, can make to know art person and understand that the present invention can reach object defined above really, meet the regulation of Patent Law, whence proposes patent application.
As described above, it is only presently preferred embodiments of the present invention, when the scope event that the present invention implements, all simple equivalence changes made according to scope of the present invention patent and description and modification can not be limited with this, all should still remain within the scope of the patent.
Claims (8)
1. the diaphragm control method of a camera head, it is characterised in that this control method step includes:
Image is shot with video-corder: this circle is to use motor to drive, and motor is to drive with motor drive circuit
Dynamic, and shoot with video-corder image with circle and be transferred in CIS；
Obtain an image: this CIS is connected to image processor, and image processor again with action
Controller connects, and is provided with image analysis program in this movement controller and controls logical order, and image divides
Analysis program is to capture a static image from CIS；
Acquirement image processor information: and movement controller obtains in image processor in image processor
Information；
Acquirement circle information and position: and movement controller obtains the light of circle in circle
Information and motor position；
Image analysing computer: i.e. this static image is entered after capturing a static image from CIS
Row image analysing computer, to obtain bright spot brightness, mean flow rate and the information of luma blocks distribution；
Judge that image brilliance is the most suitable: according to above-mentioned image analysing computer step, obtain image processor information
Step and acquirement circle information and position step comprehensively carry out judging whether brightness is overexposure, mistake
Bright or the darkest；And
Circle action: when via above-mentioned judge image brilliance whether appropriate step judge overexposure,
Cross bright or when crossing the darkest, i.e. by controlling logical order and carry out the control adjustment of image processor or motor driving electricity
The control on road adjusts, and circle and image processor can precisely be adjusted and takes the photograph to optimum state to carry out image
Record,
Wherein, in this circle action step, when judging that image brilliance is inappropriate, i.e. by action control
The control logical order of device processed adjusts automatic exposure and the automatic growth control of the automatic mode of image processor
Ultimate value, and be confirmed whether to minimize the limit or maximum state, when in ultimate value, it is automatic
Pattern i.e. keeps circle on a predetermined position, and revises automatic mold when reaching the limit values and can adjust
The automatic exposure of formula and automatic growth control range relevant parameter, so that image brilliance can be suitably.
The diaphragm control method of camera head the most according to claim 1, it is characterised in that this shadow
As the bright spot brightness in analytical procedure is further provided with the following step:
Obtain gray level information: in image, carry out capturing Y value to show its grey decision-making, and cut into many height
Block；
Add up: the grey decision-making of sub-block is divided into multiple GTG interval, more each ash in adding up sub-block
The sum of all pixels N1 that rank are interval；
Search bright spot: search bright spot to the GTG interval that grey decision-making is smaller；And
Carry out the judgement of marginal value: carry out judging that whether the sum of all pixels N1 in this GTG interval is more than marginal value T
H1, when sum of all pixels N1 is bright spot more than marginal value Th1, if sum of all pixels N1 is less than critical (T
H1 then returns to previous step and searches bright spot and again search.
The diaphragm control method of camera head the most according to claim 1, it is characterised in that this shadow
As the mean flow rate in analytical procedure is further provided with the following step:
Obtain gray level information: carry out capturing Y value to show its grey decision-making in image；
Add up grey decision-making: add up the grey decision-making of each pixel in image and make it be X；And
It is averaged brightness: totalling grey decision-making X is i.e. obtained mean flow rate divided by sum of all pixels in image.
4. according to the diaphragm control method of the described camera head of claim 1, it is characterised in that should
Judge that the overexposure in image brilliance whether appropriate step is further provided with the following step:
Obtain gray level information: in image, carry out capturing Y value to show its grey decision-making, and cut into many height
Block；
Whether comparison is more than marginal value: the average gray-scale value of this sub-block deducts overall picture average gray-scale value and comes
Judge whether more than marginal value Th2, if this sub-block noise block will be considered as when being more than marginal value Th2
The most taken into consideration；
Add up: if comparison is less than marginal value Th2, then in adding up this sub-block, its grey decision-making is more than critical
The sum of all pixels N2 of value Th3；And
Determine whether overexposure block: this sub-block is then when sum of all pixels N2 is more than marginal value Th4
For overexposure block, when sum of all pixels N2 is less than marginal value Th4, this sub-block is then non-excessive exposure
Light block.
The diaphragm control method of camera head the most according to claim 1, it is characterised in that should be certainly
Dynamic model formula, further up to ultimate value and when cannot adjust, will switch to MANUAL CONTROL mode by automatic mode,
Can change the state that is turned on and off of circle, and Non-follow control aperture time and yield value determine horse
Reach translational speed and prevent circle from shaking.
6. the aperture control system of a camera head, it is characterised in that this control system includes:
One circle, this circle is to use motor to drive；
One motor drive circuit, this motor drive circuit system is connected with circle to drive motor；
One CIS, this CIS is to be connected with circle, can shoot with video-corder image；
One image processor, this image processor is connected with CIS；And
One movement controller, this movement controller is connected with image processor and motor drive circuit, taking
Obtain the optical information in circle and motor position, and in this movement controller, be provided with image analysing computer journey
Sequence and control logical order, carry out image analysing computer by image analysis program by the image of CIS,
And judge that image brilliance is whether suitable according to image analysing computer result, and it is considered as noise to filter by crossing bright light source,
The control controlling adjustment and motor drive circuit carrying out image processor by controlling logical order again is adjusted
Whole, circle and image processor can precisely be adjusted and shoots with video-corder to optimum state to carry out image,
Wherein, the image analysing computer result in this movement controller, for judge when image brilliance is inappropriate, i.e. enters one
Walk by movement controller control logical order adjust image processor automatic mode automatic exposure and
Automatic growth control ultimate value, and be confirmed whether to minimize the limit or maximum state, when in the limit
Time in value, its automatic mode keeps circle on a predetermined position, and when reaching the limit values and can adjust
I.e. revise automatic exposure and the automatic growth control range relevant parameter of automatic mode, so that image brilliance
Can be suitably.
The aperture control system of camera head the most according to claim 6, it is characterised in that this shadow
As analyzing further for obtaining bright spot brightness, mean flow rate and the information of luma blocks distribution.
The aperture control system of camera head the most according to claim 6, it is characterised in that should be certainly
Dynamic model formula, further up to ultimate value and when cannot adjust, will switch to MANUAL CONTROL mode by automatic mode,
Can change the state that is turned on and off of circle, and Non-follow control aperture time and yield value determine horse
Reach translational speed and prevent circle from shaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210281079.0A CN103581564B (en) | 2012-08-08 | 2012-08-08 | The aperture control system of camera head and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210281079.0A CN103581564B (en) | 2012-08-08 | 2012-08-08 | The aperture control system of camera head and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103581564A CN103581564A (en) | 2014-02-12 |
| CN103581564B true CN103581564B (en) | 2016-12-21 |
Family
ID=50052387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210281079.0A Expired - Fee Related CN103581564B (en) | 2012-08-08 | 2012-08-08 | The aperture control system of camera head and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103581564B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401823B (en) * | 2019-09-05 | 2024-03-05 | 天芯宜智能网络科技(天津)有限公司 | Port strong light environment dynamic intelligent self-adaptive camera shooting system and camera shooting method |
| CN112153280B (en) * | 2020-08-31 | 2022-02-15 | 浙江赫千电子科技有限公司 | Active alignment method applied to camera module |
| CN114594464B (en) * | 2022-05-10 | 2022-08-09 | 合肥智辉空间科技有限责任公司 | Human body existence detection method and system based on millimeter wave sensing technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1450793A (en) * | 2002-04-10 | 2003-10-22 | 中华电信股份有限公司 | Digital image monitoring control system capable of automatic adjusting lens diaphragm and detecting object movement |
| CN102135700A (en) * | 2010-01-22 | 2011-07-27 | 杭州海康威视软件有限公司 | Automatic aperture adjusting method and device |
| CN102148928A (en) * | 2010-02-09 | 2011-08-10 | 阿克塞斯股份公司 | Calibration of a lense device |
| CN102269913A (en) * | 2010-06-07 | 2011-12-07 | 鸿富锦精密工业（深圳）有限公司 | Aperture control system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5087229B2 (en) * | 2006-03-30 | 2012-12-05 | 富士フイルム株式会社 | Lens aperture adjustment device for closed circuit TV camera |
-
2012
- 2012-08-08 CN CN201210281079.0A patent/CN103581564B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1450793A (en) * | 2002-04-10 | 2003-10-22 | 中华电信股份有限公司 | Digital image monitoring control system capable of automatic adjusting lens diaphragm and detecting object movement |
| CN102135700A (en) * | 2010-01-22 | 2011-07-27 | 杭州海康威视软件有限公司 | Automatic aperture adjusting method and device |
| CN102148928A (en) * | 2010-02-09 | 2011-08-10 | 阿克塞斯股份公司 | Calibration of a lense device |
| CN102269913A (en) * | 2010-06-07 | 2011-12-07 | 鸿富锦精密工业（深圳）有限公司 | Aperture control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103581564A (en) | 2014-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101325659B (en) | Imaging device, imaging method | |
| US8472671B2 (en) | Tracking apparatus, tracking method, and computer-readable storage medium | |
| KR101629512B1 (en) | Method for capturing digital image and digital camera thereof | |
| KR101692401B1 (en) | Image process method and apparatus | |
| US9066017B2 (en) | Viewfinder display based on metering images | |
| KR101890305B1 (en) | Photographing apparatus, method for controlling the same, and computer-readable recording medium | |
| CN105578068B (en) | A kind of generation method of high dynamic range images, device and mobile terminal | |
| US7893969B2 (en) | System for and method of controlling a parameter used for detecting an objective body in an image and computer program | |
| US7889265B2 (en) | Imaging apparatus, control method for the imaging apparatus, and storage medium storing computer program which causes a computer to execute the control method for the imaging apparatus | |
| KR101643613B1 (en) | Digital image process apparatus, method for image processing and storage medium thereof | |
| EP3053332A1 (en) | Using a second camera to adjust settings of first camera | |
| WO2014093042A1 (en) | Determining an image capture payload burst structure based on metering image capture sweep | |
| JP2008228090A (en) | Imaging apparatus and automatic exposure control method | |
| EP2753067A1 (en) | Digital photographing apparatus, method of controlling the same, and computer-readable recording medium | |
| US9723194B2 (en) | Photographing apparatus providing image transmission based on communication status, method of controlling the same, and non-transitory computer-readable storage medium for executing the method | |
| CN103581564B (en) | The aperture control system of camera head and method thereof | |
| JP2007052061A (en) | Imaging device, focusing operation control method, and electronic information apparatus | |
| US8681245B2 (en) | Digital photographing apparatus, and method for providing bokeh effects | |
| KR101797040B1 (en) | Digital photographing apparatus and control method thereof | |
| JP4392384B2 (en) | Automatic exposure control device | |
| US20120075495A1 (en) | Electronic camera | |
| US20100254691A1 (en) | Electronic camera | |
| CN101025546A (en) | Automatic shooting method and system | |
| CN110278381A (en) | A kind of smart phone manual focus method and system | |
| KR20090079393A (en) | Apparatus and method for displaying document transformed into time domain |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |