CN106341594A - Camera auxiliary focusing method - Google Patents
Camera auxiliary focusing method Download PDFInfo
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- CN106341594A CN106341594A CN201610710705.1A CN201610710705A CN106341594A CN 106341594 A CN106341594 A CN 106341594A CN 201610710705 A CN201610710705 A CN 201610710705A CN 106341594 A CN106341594 A CN 106341594A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000011156 evaluation Methods 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
The invention discloses a camera auxiliary focusing method comprising the specific steps as follows: S1, a definition calculation unit filters an image to get a filtered image; S2, all the pixels of the filtered image are summed to get an evaluation value of image definition, and the evaluation value of image definition is superimposed on an image acquired by a camera in digital form; and S3, the value is observed in the focusing process, and the clearest point is focused when the value reaches the maximum. According to the auxiliary focusing method put forward by the invention, the evaluation value of image definition is calculated and superimposed on an original image, so an operator of a camera can judge whether focusing is clear by observing the value. The auxiliary focusing method is simple to operate. The evaluation value of image definition is objective and effective. The workload of operators can be reduced greatly, the focusing efficiency of an operator of a camera equipped with a manual focusing lens can be improved, and the accuracy of focusing can be improved.
Description
Technical field
The present invention relates to field of photography, the assisted focused method of specifically a kind of video camera.
Background technology
Video camera is optical signalling to be changed into the signal of telecommunication and is further converted into digital signal, and digital signal is delivered to
Record on the recording mediums such as videocorder, or the equipment showing is sent to by broadcasting system on monitor.Equipped with
The production of the video camera of the manual focusing lens and during using it is often necessary to lens focusing.In practical operation, people need
One side rotating lens, go to observe object the presenting in camera views that some details are enriched by naked eyes, to judge
Whether camera lens focuses clearly.This type of focusing has two shortcomings, and one is that work efficiency is slow, and two is poor accuracy, and focusing is not
Must be optimal articulation point, this is all that user brings inconvenience.
Content of the invention
It is an object of the invention to provide a kind of assisted focused method of video camera, to solve to propose in above-mentioned background technology
Problem.
For achieving the above object, the following technical scheme of present invention offer:
A kind of assisted focused method of video camera, specifically comprises the following steps that
Step one, sharpness computation unit is filtered with vertical direction from horizontal direction respectively to image, and each contented
To filtering image；
Step 2, all pixels summation to filtering image will obtain the evaluation of estimate of an image definition, and image is clear
The evaluation of estimate of clear degree is superimposed upon on the image of camera acquisition in digital form；
Step 3, operator can observe numerical values recited in focus process, and it is the most clear that numerical value is focused when maximum
Point.
As the further scheme of the present invention: this algorithm includes controlling switch unit, sharpness computation unit and character and folds
Plus unit.
As the further scheme of the present invention: the evaluation of estimate of image definition is by filtering horizontally and vertically
The calculated numerical value of image, is multiplied by a weighted value respectively and then sues for peace.
As the further scheme of the present invention: sharpness computation unit adopts iir band filter.
As the further scheme of the present invention: the evaluation of estimate of image definition is superimposed upon on image character adding unit.
Compared with prior art, the invention has the beneficial effects as follows: the present invention proposes and a kind of calculates the commenting of image definition
It is worth, and it is added on original image so that the operator of video camera can be by observing the size of this numerical value, judgement be
No focusing clearly auxilary focusing method, this auxilary focusing method is simple to operate, and the evaluation of estimate of image definition is objective effectively,
The work load of operator can significantly be mitigated, the focusing work of the operator of video camera equipped with the manual focusing lens can be improved
Make efficiency, and the accuracy focused can be improved, using effect is good.
Brief description
Fig. 1 is the structural representation of the assisted focused method of video camera.
Specific embodiment
With reference to specific embodiment, the technical scheme of this patent is described in more detail.
A kind of assisted focused method of video camera, specifically comprises the following steps that
Step one, sharpness computation unit adopts the iir band filter pair that a frequency response curve is [0.1,0.9]
Image is filtered respectively with vertical direction from horizontal direction, and each obtains filtering image；
Image is horizontally oriented spatial domain or the signal in vertical direction spatial domain in the pixel distribution of horizontal or vertical direction
Sampling.Low frequency part in the signal of spatial domain correspond to the essential information of image, HFS correspond to strong edge in image with
And noise.Filter the edge feature information that the low frequency in the signal of spatial domain [0,0,1] partly can extract image, and calculate definition
Evaluation of estimate, filters the interference that the high frequency in the signal of spatial domain [0.9,1] partly can suppress noise.
Step 2, all pixels summation to every width filtering image will respectively obtain a numerical value.Filter result mixes
By calculated for filtering image horizontally and vertically numerical value, it is multiplied by a weighted value respectively and then sues for peace, obtain
Numerical value just be image definition evaluation of estimate.The definition of the evaluation of estimate energy effective evaluation present image of image definition, number
Value is more big more clear.Operator can quickly judge whether manual focus operations allow by the evaluation of estimate of movement images definition
Video camera reaches the most clearly state.Actually used experience have shown that, excessive numerical value will waste operator's thinking and sentence
The disconnected time, again not, it is to manage most that the definition evaluation of estimate of image is controlled within 5 digits to a too small numerical value accuracy
The state thought, so the definition evaluation of estimate of image will be divided by a steady state value；
The image definition evaluation value obtaining in sharpness computation unit is converted to dot character simultaneously by character adding unit
It is added on image, the evaluation of estimate of image definition is just superimposed upon on the image of camera acquisition in digital form, makes
Operator can on monitor or other equipment real time inspection to the evaluation of estimate of camera review definition, auxiliary hand-operating
Focus process.
Step 3, operator can observe numerical values recited in focus process, and it is the most clear that numerical value is focused when maximum
Point, controlling switch unit is mainly used in controlling the opening and closing of assisted focused function, opens auxiliary only when there being focusing demand
Focusing function, other when closing function, it is to avoid still see the evaluation of estimate of image definition in normal use.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment party
Formula, in the ken that one skilled in the relevant art possesses, can also be on the premise of without departing from this patent objective
Make a variety of changes.
Claims (5)
1. a kind of assisted focused method of video camera is it is characterised in that specifically comprise the following steps that
Step one, sharpness computation unit is filtered with vertical direction from horizontal direction respectively to image, and is each filtered
Ripple image；
Step 2, all pixels summation to filtering image will obtain the evaluation of estimate of an image definition, by image definition
Evaluation of estimate be superimposed upon in digital form on the image of camera acquisition；
Step 3, operator can observe numerical values recited in focus process, articulation point of focusing during numerical value maximum.
2. the assisted focused method of video camera according to claim 1 is it is characterised in that described algorithm includes control and open
Close unit, sharpness computation unit and character adding unit.
3. video camera according to claim 1 and 2 assisted focused method is it is characterised in that described image definition
Evaluation of estimate is by calculated for filtering image horizontally and vertically numerical value, is multiplied by a weighted value respectively and then asks
With.
4. the assisted focused method of video camera according to claim 1 is it is characterised in that described sharpness computation unit is adopted
Use iir band filter.
5. the assisted focused method of video camera according to claim 1 will be it is characterised in that described character adding unit will be schemed
The evaluation of estimate of image sharpness is superimposed upon on image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610710705.1A CN106341594A (en) | 2016-08-23 | 2016-08-23 | Camera auxiliary focusing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610710705.1A CN106341594A (en) | 2016-08-23 | 2016-08-23 | Camera auxiliary focusing method |
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| CN106341594A true CN106341594A (en) | 2017-01-18 |
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| CN201610710705.1A Pending CN106341594A (en) | 2016-08-23 | 2016-08-23 | Camera auxiliary focusing method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107948502A (en) * | 2017-11-08 | 2018-04-20 | 广州网路通电子有限公司 | A kind of monitor camera image focusing measuring system and its measuring method |
| CN108513115A (en) * | 2018-03-14 | 2018-09-07 | 深圳市点睛创视技术有限公司 | A kind of dynamic focusing window selection method and apparatus in optical projection system |
| CN108513709A (en) * | 2017-08-25 | 2018-09-07 | 深圳市大疆创新科技有限公司 | Manual focus householder method, device and unmanned vehicle |
| CN108765346A (en) * | 2018-05-30 | 2018-11-06 | 北京图森未来科技有限公司 | A kind of auxilary focusing method, device and readable medium |
| CN110035216A (en) * | 2018-01-11 | 2019-07-19 | 浙江宇视科技有限公司 | A kind of semi-automatic focusing method of visualization and device of manual zoom camera lens |
| CN111198466A (en) * | 2018-11-16 | 2020-05-26 | 北京图森智途科技有限公司 | Manual focusing auxiliary method, imaging device and automobile |
| CN116095481A (en) * | 2023-01-13 | 2023-05-09 | 杭州微影软件有限公司 | Auxiliary focusing method and device, electronic equipment and storage medium |
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| CN1713063A (en) * | 2004-06-15 | 2005-12-28 | 佳能株式会社 | Auto-focusing apparatus and image pickup apparatus including the same |
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| CN103168461A (en) * | 2010-08-18 | 2013-06-19 | 罗伯特·博世有限公司 | Device for assisting focusing of a camera |
| CN103874951A (en) * | 2011-10-11 | 2014-06-18 | 奥林巴斯株式会社 | Focus control device, endoscope system and focus control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108513709A (en) * | 2017-08-25 | 2018-09-07 | 深圳市大疆创新科技有限公司 | Manual focus householder method, device and unmanned vehicle |
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| CN110035216A (en) * | 2018-01-11 | 2019-07-19 | 浙江宇视科技有限公司 | A kind of semi-automatic focusing method of visualization and device of manual zoom camera lens |
| CN108513115A (en) * | 2018-03-14 | 2018-09-07 | 深圳市点睛创视技术有限公司 | A kind of dynamic focusing window selection method and apparatus in optical projection system |
| CN108513115B (en) * | 2018-03-14 | 2020-08-18 | 深圳市点睛创视技术有限公司 | Dynamic focusing window selection method and device in projection system |
| CN108765346A (en) * | 2018-05-30 | 2018-11-06 | 北京图森未来科技有限公司 | A kind of auxilary focusing method, device and readable medium |
| CN108765346B (en) * | 2018-05-30 | 2021-01-08 | 北京图森智途科技有限公司 | Auxiliary focusing method and device and readable medium |
| CN111198466A (en) * | 2018-11-16 | 2020-05-26 | 北京图森智途科技有限公司 | Manual focusing auxiliary method, imaging device and automobile |
| CN111198466B (en) * | 2018-11-16 | 2022-06-21 | 北京图森智途科技有限公司 | Manual focusing auxiliary method, imaging device and automobile |
| CN116095481A (en) * | 2023-01-13 | 2023-05-09 | 杭州微影软件有限公司 | Auxiliary focusing method and device, electronic equipment and storage medium |
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Effective date of registration: 20170324 Address after: 200120 Shanghai Pudong New Area South Road, No. 1, building 2 floor C area 4888 Applicant after: SHANGHAI FOCUS VISION SECURITY TECHNOLOGY CO., LTD. Address before: 200120 Shanghai Pudong New Area South Road, No. 1, building 2 floor C area 4888 Applicant before: SHANGHAI FOCUS VISION SECURITY TECHNOLOGY CO., LTD. Applicant before: Shanghai Wharton Electronic Technology (Group) Co., Ltd. Applicant before: SHANGHAI AIPU WATON ELECTRONIC INDUSTRIES CO., LTD. |
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Application publication date: 20170118 |
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