CN106657787A - Fast correction method for zoom tracking curve - Google Patents
Fast correction method for zoom tracking curve Download PDFInfo
- Publication number
- CN106657787A CN106657787A CN201611230945.8A CN201611230945A CN106657787A CN 106657787 A CN106657787 A CN 106657787A CN 201611230945 A CN201611230945 A CN 201611230945A CN 106657787 A CN106657787 A CN 106657787A
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- Prior art keywords
- zoom
- real
- focusing
- tracking curve
- reasons
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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
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Abstract
The invention provides a fast correction method for a zoom tracking curve. The method comprises the following steps of selecting zoom positions, and computing zoom position differences; determining focusing positions; computing focusing position differences; traversing the focusing positions on a theoretical zoom tracking curve of a lens; computing offsets between the actual and theoretical zoom positions and focusing positions; and acquiring an actual zoom tracking curve. The method provided by the invention has the beneficial effects that an automatic focusing algorithm only needs to be performed on the three focusing positions, so that correction time is greatly shortened, consumption of many memories is saved, and a data statistical and computation amount is reduced; detail differences of the curve are ignored, and only a general trend is considered, so that the situation that a final correction result is influenced by excessive difference of one point is excluded, and a success rate of correction is improved; images have good definition when the corrected zoom tracking curve is in a zoom following process, and the method provided by the invention is significantly improved in speed compared with other correction methods.
Description
Technical field
The invention belongs to technical field of video monitoring, more particularly, to a kind of method for quickly correcting of zoom tracking curve.
Background technology
In video monitoring, zoom lens can be often used, the camera lens of certain fixing model specification has its corresponding a set of preferable
Aircraft pursuit course, when camera lens does zoom action according to preferable aircraft pursuit course, image there may be in various degree in zooming procedure
It is fuzzy, this is accomplished by the zoom to each camera lens, the optical reference position of focusing and does corresponding adjustment, to obtain being best suitable for this
The zoom tracking curve of camera lens.
As shown in figure 1, be the diagram of certain camera lens of brand one theory aircraft pursuit course and actual tracking curve under certain object distance, the figure
Middle abscissa represents the zoom position zoom of camera lens, and ordinate represents the focusing position focus of camera lens；Block curve is preferable
Zoom tracking curve, dashed curve is actual zoom tracking curve, camera lens in zooming procedure, if focusing position energy according to
Actual curve does respective change, and that all can be clearly in the whole process image of zoom action.So obtaining each camera lens
Actual zoom tracking curve is the problem for needing to solve.
The content of the invention
In view of this, it is contemplated that proposing a kind of method for quickly correcting of zoom tracking curve, to obtain being best suitable for mirror
The zoom tracking curve of head, is effectively increased the definition of image.
To reach above-mentioned purpose, the technical scheme is that what is be achieved in that：
The method for quickly correcting of zoom tracking curve, comprises the following steps：
A. three zoom position zoom1 of averagely selection camera lens ideal zoom tracking curve are real, zoom2 is real, zoom3 realities,
And calculate its difference width1, width2, width3 two-by-two respectively；
B. determine that these three zoom positions distinguish corresponding focusing position focus1 realities, focus2 according to auto-focusing algorithm
Real, focus3 realities；
C. three above focusing position difference between any two is calculated respectively,
Real-focus2 the realities of △ focus1=focus1,
Real-focus3 the realities of △ focus2=focus2,
Real-focus3 the realities of △ focus3=focus1；
D. travel through zoom position difference on the theoretical zoom tracking curve of camera lens and be respectively width1, width2, width3,
And correspondence focusing position difference △ focus1, △ focus2, three groups of zoom positions of △ focus3, i.e. zoom1 reasons, zoom2
Reason, zoom3 reasons, and focus1 reasons, focus2 reasons, focus3 three groups of focusing positions of reason；
E. the side-play amount of two groups of actual and theoretical zoom positions and focusing position in calculation procedure D is distinguished,
Zoomoffset=((real-zoom1 reasons of zoom1)+
(real-zoom2 reasons of zoom2)+(real-zoom3 reasons of zoom3))/3,
Focusoffset=((real-focus1 reasons of focus1)+
(real-focus2 reasons of focus2)+(real-focus3 reasons of focus3))/3；
F. respectively plus zoom and focusing on the corresponding zoom of preferable zoom tracking curve and focusing datum mark of camera lens
Side-play amount, the new curve for drawing is the actual zoom tracking curve of the camera lens.
Further, zoom position Difference, the focusing position two of three points on the actual zoom tracking curve
Two difference is consistent with three points on preferable zoom tracking curve.
Relative to prior art, the method for quickly correcting of zoom tracking curve of the present invention has the advantage that：
The method for quickly correcting of zoom tracking curve of the present invention only need to automatically be focused on to three zoom positions
Algorithm, substantially reduces correction time；And multiple zoom positions need not be taken, and the consumption of many internal memories is saved, reduce data
Statistics and amount of calculation；The detail differences of curve are have ignored, general trend is only considered, is eliminated because the excessive impact of certain point difference
Last correction result, improves the success rate of correction；Zoom tracking curve after correction image during zoom is followed
There is good definition performance, and compare other bearing calibrations and be obviously improved in speed.
Description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the diagram of certain camera lens of brand one theory aircraft pursuit course and actual tracking curve under certain object distance；
Fig. 2 is the schematic flow sheet of the embodiment of the present invention.
Specific embodiment
It should be noted that in the case where not conflicting, the embodiment and the feature in embodiment in the present invention can phase
Mutually combination.
Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
The method for quickly correcting of zoom tracking curve, as shown in Fig. 2 comprising the following steps：
A. first average on the preferable zoom tracking curve that producer provides to choose three points, its zoom position is denoted as respectively
Zoom1 is real, zoom2 is real, zoom3 realities, and calculates its difference width1, width2, width3 two-by-two respectively,
Real-zoom2 the realities of width1=zoom1,
Real-zoom3 the realities of width2=zoom2,
Real-zoom3 the realities of width3=zoom1；
B. position zoom1 realities are zoomed to, according to auto-focusing algorithm, corresponding focusing position is obtained, focus1 realities are denoted as,
Position zoom2 realities are zoomed to, according to auto-focusing algorithm, corresponding focusing position is obtained, focus2 realities are denoted as, position is zoomed to
Zoom3 realities, according to auto-focusing algorithm, obtain corresponding focusing position, are denoted as focus3 realities；
C. three above focusing position difference between any two is calculated respectively,
Real-focus2 the realities of △ focus1=focus1,
Real-focus3 the realities of △ focus2=focus2,
Real-focus3 the realities of △ focus3=focus1；
D. the two zoom position differences of theoretical zoom tracking curve for traveling through camera lens are width1 and position of focusing accordingly
One group of zoom position zoom1 reasons and focusing position focus1 reasons of poor △ focus1 are put,
Two zoom position differences of theoretical zoom tracking curve of traversal camera lens are width2 and corresponding focusing position
One group of zoom position zoom2 reasons and focusing position focus2 reasons of difference △ focus2,
Two zoom position differences of theoretical zoom tracking curve of traversal camera lens are width3 and corresponding focusing position
One group of zoom position zoom3 reasons and focusing position focus3 reasons of difference △ focus3；
E. the side-play amount of two groups of actual and theoretical zoom positions and focusing position in calculation procedure D is distinguished,
Zoomoffset=((real-zoom1 reasons of zoom1)+
(real-zoom2 reasons of zoom2)+(real-zoom3 reasons of zoom3))/3,
Focusoffset=((real-focus1 reasons of focus1)+
(real-focus2 reasons of focus2)+(real-focus3 reasons of focus3))/3；
F. respectively plus zoom and focusing on the corresponding zoom of preferable zoom tracking curve and focusing datum mark of camera lens
Side-play amount, the new curve for drawing is the actual zoom tracking curve of the camera lens.
The zoom position Difference of three points on the actual zoom tracking curve, focusing position Difference and
Three points on preferable zoom tracking curve it is consistent.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (2)
1. the method for quickly correcting of zoom tracking curve, it is characterised in that comprise the following steps：
A. three zoom position zoom1 of averagely selection camera lens ideal zoom tracking curve are real, zoom2 is real, zoom3 realities, and point
Do not calculate its difference width1, width2, width3 two-by-two；
B. according to auto-focusing algorithm determine these three zoom positions distinguish that corresponding focusing position focus1 is real, focus2 is real,
Focus3 realities；
C. three above focusing position difference between any two is calculated respectively,
Real-focus2 the realities of △ focus1=focus1,
Real-focus3 the realities of △ focus2=focus2,
Real-focus3 the realities of △ focus3=focus1；
D. travel through zoom position difference on the theoretical zoom tracking curve of camera lens and be respectively width1, width2, width3, and
Correspondence focusing position difference △ focus1, △ focus2, three groups of zoom positions of △ focus3, i.e. zoom1 is managed, zoom2 is managed,
Zoom3 is managed, and focus1 reasons, focus2 reasons, focus3 manage three groups of focusing positions；
E. the side-play amount of two groups of actual and theoretical zoom positions and focusing position in calculation procedure D is distinguished,
Zoomoffset=((real-zoom1 reasons of zoom1)+
(real-zoom2 reasons of zoom2)+(real-zoom3 reasons of zoom3))/3,
Focusoffset=((real-focus1 reasons of focus1)+
(real-focus2 reasons of focus2)+(real-focus3 reasons of focus3))/3；
F. it is inclined with focusing plus zoom respectively on the corresponding zoom of preferable zoom tracking curve and focusing datum mark of camera lens
Shifting amount, the new curve for drawing is the actual zoom tracking curve of the camera lens.
2. the method for quickly correcting of zoom tracking curve according to claim 1, it is characterised in that：The actual zoom with
On the zoom position Difference of three points on track curve, the equal and preferable zoom tracking curve of focusing position Difference three
Individual point it is consistent.
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| CN201611230945.8A CN106657787A (en) | 2016-12-28 | 2016-12-28 | Fast correction method for zoom tracking curve |
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| CN201611230945.8A CN106657787A (en) | 2016-12-28 | 2016-12-28 | Fast correction method for zoom tracking curve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525779A (en) * | 2018-12-19 | 2019-03-26 | 杭州晨安科技股份有限公司 | A kind of quick correction of zoom tracking curve and verification method |
| CN110971810A (en) * | 2018-09-29 | 2020-04-07 | 浙江宇视科技有限公司 | Movement lens return path difference processing method and device |
| CN112630924A (en) * | 2020-11-30 | 2021-04-09 | 中山联合光电研究院有限公司 | Zoom curve correction method, device, storage medium and system |
| WO2021189403A1 (en) * | 2020-03-27 | 2021-09-30 | 深圳市大疆创新科技有限公司 | Method and apparatus for determining focus point, lens, imaging apparatus and movable platform |
| CN114245008A (en) * | 2021-12-07 | 2022-03-25 | 天地伟业技术有限公司 | Focusing method, device, electronic equipment and computer readable storage medium |
| CN114900606A (en) * | 2022-03-31 | 2022-08-12 | 浙江华创视讯科技有限公司 | Method and device for calibrating zoom tracking curve, electronic device and storage medium |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110971810A (en) * | 2018-09-29 | 2020-04-07 | 浙江宇视科技有限公司 | Movement lens return path difference processing method and device |
| CN110971810B (en) * | 2018-09-29 | 2021-06-22 | 浙江宇视科技有限公司 | Movement lens return path difference processing method and device |
| CN109525779A (en) * | 2018-12-19 | 2019-03-26 | 杭州晨安科技股份有限公司 | A kind of quick correction of zoom tracking curve and verification method |
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| WO2021189403A1 (en) * | 2020-03-27 | 2021-09-30 | 深圳市大疆创新科技有限公司 | Method and apparatus for determining focus point, lens, imaging apparatus and movable platform |
| CN112630924A (en) * | 2020-11-30 | 2021-04-09 | 中山联合光电研究院有限公司 | Zoom curve correction method, device, storage medium and system |
| CN114245008A (en) * | 2021-12-07 | 2022-03-25 | 天地伟业技术有限公司 | Focusing method, device, electronic equipment and computer readable storage medium |
| CN114245008B (en) * | 2021-12-07 | 2024-02-20 | 天地伟业技术有限公司 | Focusing method, focusing device, electronic equipment and computer readable storage medium |
| CN114900606A (en) * | 2022-03-31 | 2022-08-12 | 浙江华创视讯科技有限公司 | Method and device for calibrating zoom tracking curve, electronic device and storage medium |
| CN114900606B (en) * | 2022-03-31 | 2024-01-05 | 浙江华创视讯科技有限公司 | Calibration method and device for zoom tracking curve, electronic device and storage medium |
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Application publication date: 20170510 |