CN108055471A - A kind of iris correction method and device - Google Patents
A kind of iris correction method and device Download PDFInfo
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- CN108055471A CN108055471A CN201711134235.XA CN201711134235A CN108055471A CN 108055471 A CN108055471 A CN 108055471A CN 201711134235 A CN201711134235 A CN 201711134235A CN 108055471 A CN108055471 A CN 108055471A
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- 230000004907 flux Effects 0.000 claims abstract description 84
- 238000003384 imaging method Methods 0.000 claims description 14
- 241001269238 Data Species 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/081—Analogue circuits
- G03B7/085—Analogue circuits for control of aperture
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Control For Cameras (AREA)
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Abstract
The present invention is suitable for camera technology field, provides a kind of iris correction method, comprises the following steps：The stroke of aperture is divided into multistage, quantifies the stroke of aperture；The size of aperture is divided into multiple grades, each grade corresponds to a pre-determined factor；Obtain the highlight flux of aperture；By large and small or adjust aperture by small and the earth and obtain adjusting luminous flux；The ratio for adjusting luminous flux and highlight flux is calculated, when ratio is equal to any coefficient, the stroke of the corresponding grade of record coefficient and aperture completes the calibration of a grade, until completing the calibration of whole grades, records the corresponding data of whole grades and stroke.Aperture carries out batch correction before dispatching from the factory and preserves data, the data are directly invoked when using video camera, since the bearing calibration is to be realized after aperture is made based on its actual entering light situation, therefore can ensure to correct influence of the result from aperture mismachining tolerance so that the regulating effect using the video camera of different apertures is consistent.
Description
Technical field
The invention belongs to camera technology field, the bearing calibration of more particularly to a kind of aperture and device.
Background technology
Aperture is a kind of device for being used for that light is controlled to enter the luminous flux of photosurface in fuselage through camera lens.In daily life
In work, video camera is applied in the larger occasion of illumination variation, therefore in order to ensure that video camera can generate normally
Image just must adjust aperture size according to intensity of illumination at any time.But video camera is typically secured to higher position, it is not square
Just aperture size is manually adjusted, therefore most of video camera is provided with automatic diaphragm lens, so that video camera can obtain
Normal image.
Auto iris be by automatically control aperture size ensure video camera can correct exposure be imaged, to make image
Ideally present.Due to aperture when manufacturing there are certain error, different apertures is carried out using identical correcting mode
Timing, the effect of correction have differences, cause that aperture size cannot be precisely controlled, thus it is same that different cameras is caused to use
During sample parameter adjustment aperture, the aperture size of adjustment is inconsistent or error is larger so that camera output has larger
Difference.
The content of the invention
It is an object of the invention to provide a kind of iris correction methods, it is intended to solve traditional aperture because foozle causes not
With camera aperture calibration result it is inconsistent the technical issues of.
The present invention is achieved in that a kind of iris correction method, comprises the following steps：
A, the stroke of aperture is divided into multistage, quantifies the stroke of the aperture；
B, the size of aperture is divided into multiple grades, each grade corresponds to a coefficient, and the coefficient is predetermined value；
C, the highlight flux of the aperture is obtained；
D, by large and small or by small and the earth adjust the aperture, and adjusting light of the aperture during adjusting is obtained
Flux；
E, the ratio for adjusting luminous flux and the highlight flux is calculated, when the ratio is equal to any coefficient
When, the stroke of the corresponding grade of the coefficient and the aperture is recorded, completes the calibration of a grade, until completing whole institutes
The calibration of grade is stated, records all corresponding datas of the grade and the stroke.
Further, the step A is specially：
The stroke of aperture is divided into multistage, hop count is more than the number of degrees of the aperture, using number by small and the earth
Mark the hop count.
Further, the stroke of the aperture is divided into 800~1500 sections, and the grade of the aperture is divided into 12 grades, described
12 grades of coefficient is respectively 1,0.875,0.65,0.5,0.34,0.23,0.14,0.09,0.05.0.025,0.0125,0.
Further, the stroke is divided into 1000 sections, and the stroke is quantified as 0~1000；
The stroke 0 is corresponding with grade 1, and stroke 1000 is corresponding with grade 12, alternatively, the stroke 0 is corresponding with grade 12,
Stroke 1000 is corresponding with grade 1；
The 1 corresponding coefficient of grade is 0, and the 12 corresponding coefficient of grade is 1 or 1 corresponding system of the grade
Number is 1, and the 12 corresponding coefficient of grade is 0.
Further, the step C is specially：
The aperture on video camera is opened into full-size, is connect on the imaging surface of the sensor of the video camera
The luminous flux of receipts is highlight flux.
Further, the average brightness for adjusting luminous flux and highlight flux and being received for the imaging surface of the sensor
Divided by the time for exposure of the sensor.
Further, the step E is specially：
E1, the ratio for adjusting luminous flux and the highlight flux is calculated, it is any judges whether the ratio is equal to
The coefficient is to carry out step E2, otherwise carries out the step D；
E2, the stroke for recording the corresponding grade of the coefficient and the aperture complete the calibration of a grade；
E3, judge whether to complete the calibration of all grades, be to carry out step E4, otherwise carry out step D；
E4, all corresponding datas of the grade and the stroke are preserved.
Further, the step for initializing the chip of the aperture and correction is further included before the step A
Suddenly.
Another object of the present invention is to provide to implement the device of above-mentioned iris correction method, including：
Camera lens, including the aperture；
Imaging sensor, for receiving the light through the aperture；
Picture processing chip, for sending aperture control signal to aperture control chip, for being sensed according to described image
The image data that device is sent calculates the ratio for adjusting luminous flux and the highlight flux, when the ratio is equal to any institute
When stating coefficient, the stroke of the corresponding grade of the coefficient and the aperture is recorded, completes the calibration of a grade, until completing
All calibration of the grade, and record all corresponding datas of the grade and the stroke；
Aperture control chip, for according to the aperture control signal by it is large and small or by it is small and the earth adjust the light
Circle.
Further, described image processing chip includes：
Computing module, the image data for being sent according to described image sensor calculate the adjusting luminous flux and maximum
Luminous flux calculates the ratio for adjusting luminous flux and highlight flux；
Analysis module, for judging whether the ratio is equal to any coefficient；
Demarcating module, for when the ratio is equal to any coefficient, recording the corresponding grade of the coefficient and institute
The stroke of aperture is stated, completes the calibration of a grade；
Memory module, for preserving all corresponding datas of the grade and the stroke.
Iris correction method provided by the invention has the advantages that：
The iris correction method is by the range-adjustable of aperture and represents that the grade of aperture size divides, and sets each
Grade corresponds to a fixed coefficient, which represents the ratio of the luminous flux and highlight flux when aperture is in the grade,
It represents the size of luminous flux, is demarcated by the grade to aperture and stroke, make the size of luminous flux and the adjusting of aperture
Stroke is corresponding.Aperture carries out batch correction and preserves data before dispatching from the factory, the data, user are directly invoked when using video camera
Can according to demand by aperture stroke adjustment to corresponding position to obtain it is envisioned that luminous flux, due to the bearing calibration be
What aperture was realized after making based on its actual entering light situation, therefore can ensure to correct result from aperture mismachining tolerance
It influences so that the regulating effect using the video camera of different apertures is identical, and imaging effect is consistent.
Description of the drawings
Fig. 1 is the flow chart of iris correction method provided in an embodiment of the present invention；
Fig. 2 is the module map of iris correction device provided in an embodiment of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
In order to illustrate technical solutions according to the invention, it is described in detail below in conjunction with specific accompanying drawings and embodiments.
Fig. 1 is refer to, the embodiment of the present invention provides a kind of iris correction method, comprises the following steps：
The stroke of aperture is divided into multistage by step S101, quantifies the stroke of aperture；
The size of aperture is divided into multiple grades by step S102, and each grade corresponds to a coefficient, which is predetermined
Value；
Step S103 obtains the highlight flux of aperture；
Step S104 by large and small or by small and the earth adjust aperture, and obtains adjusting light of the aperture during adjusting
Flux；
Step S105 calculates the ratio for adjusting luminous flux and highlight flux, when ratio is equal to any coefficient, record system
The stroke of the corresponding grade of number and aperture, completes the calibration of a grade, until completing the calibration of whole grades, records whole grades
With the corresponding data of stroke.
Further, the step for initializing the chip of aperture and correction is further preferably included before step S101
Suddenly.
In the above-mentioned methods, the stroke that can be adjusted of aperture is divided into multistage, quantifies stroke, it is therefore intended that be convenient for
Aperture regulated quantity is identified, in the present embodiment, hop count is more than the number of degrees of aperture, using number as described in small and the earth mark
Hop count can specifically be divided into hundreds to thousands section, such as 800~1500 sections, and the present embodiment is preferably 1000 sections, be remembered with number
Stroke is 0~1000.Required precision can be met and convenient for the mark of correction data.Correspondingly, in step s 102, by light
The size of circle is divided into multiple grades, and each grade corresponds to a coefficient, which is predetermined value.The size of the grade and aperture
It is corresponding, it is 12 grades by the grade classification of aperture in the present embodiment, the adjustable range requirement of user can be met, and just
In the mark of correction data.Wherein, the grade of aperture, coefficient and the relation between the stroke three of aperture are：One grade
A corresponding coefficient, a grade correspond to a stroke, and luminous flux when coefficient=aperture is in respective level (is subsequently denoted as
" conciliation luminous flux ") with the ratio of aperture highlight flux, which is aperture default value during fabrication.It allows users to
Desired luminous flux is obtained by adjusting aperture, then needs to demarcate above-mentioned stroke and grade, calibration process, that is, above-mentioned
Step S103~S105.
In step S103~S105, it is first determined the highlight flux of aperture, then by it is large and small or by it is small and the earth adjust
Aperture is saved, often adjusts a trip, an adjusting luminous flux is calculated, and calculates the ratio for adjusting luminous flux and highlight flux
Value when ratio is equal to any coefficient, records the corresponding grade of the coefficient and the at this time stroke of aperture, completes the mark of a grade
It is fixed.The calibration of whole grades is completed in the method, records the corresponding data of whole grades and stroke, it, can be with during user's operation
Aperture is adjusted into corresponding stroke to obtain the aperture size of corresponding grade, obtains desired luminous flux.
As a kind of embodiment, aperture range is 1000, and grade is 12 grades, and the corresponding coefficient of 12 grades is for example following
Shown in table：
| Grade | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Coefficient | 1 | 0.875 | 0.65 | 0.5 | 0.34 | 0.23 | 0.14 | 0.09 | 0.05 | 0.025 | 0.0125 | 0 |
Above-mentioned data represent：When aperture grade is 1, aperture is maximum, and luminous flux is maximum, and aperture higher grade, and aperture is smaller,
Luminous flux is smaller, and when aperture grade is 12, aperture is minimum, and luminous flux is minimum, and grade and luminous flux size are true according to above-mentioned coefficient
It is fixed.
Above-mentioned correspondence is only a kind of embodiment, can also use following correspondences：
| Grade | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Coefficient | 1 | 0.875 | 0.65 | 0.5 | 0.34 | 0.23 | 0.14 | 0.09 | 0.05 | 0.025 | 0.0125 | 0 |
Above-mentioned data represent：When aperture grade is 1, aperture is minimum, and luminous flux is minimum, and aperture higher grade, and aperture is bigger,
Luminous flux is bigger, and when aperture grade is 12, aperture is maximum, and luminous flux is maximum, and grade and luminous flux size are true according to above-mentioned coefficient
It is fixed.
The quantitative expression of stroke is usually to represent stroke size according to Digital size, for example, stroke 0 represents that aperture is in
Original state when dispatching from the factory, is not adjusted, stroke 1000, represents that aperture regulated quantity is maximum.Stroke 0 can correspond to highest ranking 12,
The lowest class 1 can also be corresponded to, you can be maximum ring or minimum aperture.
Iris correction method provided in an embodiment of the present invention by the range-adjustable of aperture and represent aperture size etc. it is grading
Row division, and set each grade and correspond to a fixed coefficient, the coefficient represent luminous flux when aperture be in the grade with
The ratio of highlight flux represents the size of luminous flux, is demarcated by the grade to aperture and stroke, make luminous flux
The adjusting stroke of size and aperture is corresponding, which is stored.Aperture carries out batch correction and preserves before dispatching from the factory
Data are directly invoked when using video camera, and user can according to demand obtain aperture stroke adjustment to corresponding position pre-
Conceivable luminous flux.Since the bearing calibration is to be realized after aperture is made based on its actual entering light situation,
It can ensure to correct influence of the result from aperture mismachining tolerance so that use the regulating effect phase of the video camera of different apertures
Together, imaging effect is consistent.
In the present embodiment, the highlight flux of aperture can be obtained so, and the aperture on video camera is opened
Full-size receives light by the imaging surface of the sensor of video camera, and the luminous flux which receives is that maximum light leads to
Amount.In the correction course of aperture, adjust luminous flux and come again by the luminous flux that the imaging surface of the sensor of video camera receives
It determines.It reconciles luminous flux and highlight flux is numerically equal to average brightness divided by the sensing that the imaging surface of sensor receives
The time for exposure of device.
Further, the step of above-mentioned steps S105 is demarcates and stores, specially：
The first step calculates the ratio for adjusting luminous flux and highlight flux, judges whether ratio is equal to any coefficient, is then
Step second step is carried out, otherwise carries out step S104；
The stroke of second step, the corresponding grade of record coefficient and aperture, completes the calibration of a grade；
3rd step judges whether to complete the calibration of whole grades, is then to carry out the 4th step, otherwise carries out step S104；
4th step preserves the corresponding data of whole grades and stroke.
With reference to figure 2, according to the bearing calibration of said aperture, present invention offer is a kind of to be used to implement above-mentioned iris correction side
The device of method, including：
Camera lens 10, including aperture 101；
Imaging sensor 20, for receiving the light through aperture 101；
Picture processing chip 30, for sending aperture control signal to aperture control chip 40, for according to image sensing
The image data that device 20 is sent calculates the ratio for adjusting luminous flux and highlight flux, when ratio is equal to any coefficient, record
The stroke of the corresponding grade of the coefficient and aperture completes the calibration of a grade, until completing the calibration of whole grades, and records complete
The corresponding data of portion's grade and stroke；
Aperture control chip 40, for according to aperture control signal by it is large and small or by it is small and the earth adjust aperture 101.
The picture processing chip 30 carries out the calibration of grade and stroke based on the result of calculation of luminous flux and above-mentioned ratio, together
Shi Shengcheng aperture control signals are sent to aperture control chip 40, so that aperture 101 ceaselessly changes size, to complete whole
The calibration of grade.
Specifically, above-mentioned picture processing chip includes：
Computing module, the image data for being sent according to imaging sensor, which calculates, adjusts luminous flux and highlight flux,
Calculate the ratio for adjusting luminous flux and highlight flux；
Analysis module, for judging whether ratio is equal to any coefficient；
Demarcating module, for when ratio is equal to any coefficient, the stroke of the corresponding grade of record coefficient and aperture to be completed
The calibration of one grade；
Memory module, for preserving the corresponding data of whole grades and stroke.
The iris correction device penetrates the optical signal of aperture by imaging sensor acquisition, and passes through picture processing chip meter
It calculates luminous flux and calculates the ratio for adjusting luminous flux and highlight flux, when the ratio is identical with predetermined coefficient, recording this is
The corresponding data of the corresponding grade of number and aperture stroke, while in correction course aperture control letter is sent to aperture control chip
Number to adjust aperture size, to complete the calibration of whole grades.Aperture is corrected by the device, and correction data is protected
It deposits, in use, user directly invokes the data in video camera, and then can ensure the aperture regulating effect of each video camera
Unanimously, it will not be influenced be subject to aperture mismachining tolerance, and then ensure that effect effect is consistent.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (10)
- A kind of 1. iris correction method, which is characterized in that comprise the following steps：A, the stroke of aperture is divided into multistage, quantifies the stroke of the aperture；B, the size of aperture is divided into multiple grades, each grade corresponds to a coefficient, and the coefficient is predetermined value；C, the highlight flux of the aperture is obtained；D, by large and small or by small and the earth adjust the aperture, and obtain adjusting light of the aperture during adjusting and lead to Amount；E, the ratio for adjusting luminous flux and the highlight flux is calculated, when the ratio is equal to any coefficient, The stroke of the corresponding grade of the coefficient and the aperture is recorded, completes the calibration of a grade, until completing described in whole The calibration of grade records all corresponding datas of the grade and the stroke.
- 2. iris correction method as described in claim 1, which is characterized in that the step A is specially：The stroke of aperture is divided into multistage, hop count is more than the number of degrees of the aperture, is marked using number by small and the earth The hop count.
- 3. iris correction method as claimed in claim 2, which is characterized in that the stroke of the aperture is divided into 800~1500 Section, the grade of the aperture are divided into 12 grades, and described 12 grades of coefficient is respectively 1,0.875,0.65,0.5,0.34,0.23, 0.14,0.09,0.05.0.025,0.0125,0。
- 4. iris correction method as claimed in claim 3, which is characterized in that the stroke is divided into 1000 sections, the stroke It is quantified as 0~1000；The stroke 0 is corresponding with grade 1, and stroke 1000 is corresponding with grade 12, alternatively, the stroke 0 is corresponding with grade 12, stroke 1000 is corresponding with grade 1；The 1 corresponding coefficient of grade is 0, and the 12 corresponding coefficient of grade is 1 or 1 corresponding coefficient of the grade is 1, the 12 corresponding coefficient of grade is 0.
- 5. such as Claims 1-4 any one of them iris correction method, which is characterized in that the step C is specially：The aperture on video camera is opened into full-size, is received on the imaging surface of the sensor of the video camera Luminous flux is highlight flux.
- 6. iris correction method as claimed in claim 5, which is characterized in that the luminous flux and highlight flux of adjusting is institute State the average brightness of imaging surface reception of sensor divided by the time for exposure of the sensor.
- 7. such as Claims 1-4 any one of them iris correction method, which is characterized in that the step E is specially：E1, the ratio for adjusting luminous flux and the highlight flux is calculated, it is any described judges whether the ratio is equal to Coefficient is to carry out step E2, otherwise carries out the step D；E2, the stroke for recording the corresponding grade of the coefficient and the aperture complete the calibration of a grade；E3, judge whether to complete the calibration of all grades, be to carry out step E4, otherwise carry out step D；E4, all corresponding datas of the grade and the stroke are preserved.
- 8. such as Claims 1-4 any one of them iris correction method, which is characterized in that further included before the step A The step of chip of the aperture and correction is initialized.
- 9. for implementing the device of iris correction method described in claim 1, which is characterized in that including：Camera lens, including the aperture；Imaging sensor, for receiving the light through the aperture；Picture processing chip, for sending aperture control signal to aperture control chip, for being sent out according to described image sensor The image data sent calculates the ratio for adjusting luminous flux and the highlight flux, when the ratio is equal to any system During number, the stroke of the corresponding grade of the coefficient and the aperture is recorded, completes the calibration of a grade, until completing all The calibration of the grade, and record all corresponding datas of the grade and the stroke；Aperture control chip, for according to the aperture control signal by it is large and small or by it is small and the earth adjust the aperture.
- 10. device as claimed in claim 9, which is characterized in that described image processing chip includes：Computing module, the image data for being sent according to described image sensor calculates the adjusting luminous flux and maximum light leads to Amount calculates the ratio for adjusting luminous flux and highlight flux；Analysis module, for judging whether the ratio is equal to any coefficient；Demarcating module, for when the ratio is equal to any coefficient, recording the corresponding grade of the coefficient and the light The stroke of circle completes the calibration of a grade；Memory module, for preserving all corresponding datas of the grade and the stroke.
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| CN201711134235.XA CN108055471B (en) | 2017-11-16 | 2017-11-16 | Aperture correction method and device |
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| CN110401823A (en) * | 2019-09-05 | 2019-11-01 | 天芯宜智能网络科技(天津)有限公司 | The adaptive camera system of harbour strong light environment dynamic and intelligent and image capture method |
| 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 |
| CN111970463A (en) * | 2020-08-24 | 2020-11-20 | 浙江大华技术股份有限公司 | Aperture correction method and apparatus, storage medium, and electronic apparatus |
| CN112269235A (en) * | 2020-11-09 | 2021-01-26 | 中国航空工业集团公司洛阳电光设备研究所 | Iris diaphragm device for low-illumination camera and automatic iris diaphragm adjusting method |
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