CN109005347A - A kind of assisted focused method of overlength zoom lens - Google Patents

A kind of assisted focused method of overlength zoom lens Download PDF

Info

Publication number
CN109005347A
CN109005347A CN201810920399.3A CN201810920399A CN109005347A CN 109005347 A CN109005347 A CN 109005347A CN 201810920399 A CN201810920399 A CN 201810920399A CN 109005347 A CN109005347 A CN 109005347A
Authority
CN
China
Prior art keywords
distance
value
zoom
overlength
zoom lens
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.)
Withdrawn
Application number
CN201810920399.3A
Other languages
Chinese (zh)
Inventor
方锐涌
张腾腾
黄仝宇
汪刚
宋兵
宋一兵
侯玉清
刘双广
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gosuncn Technology Group Co Ltd
Original Assignee
Gosuncn Technology Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gosuncn Technology Group Co Ltd filed Critical Gosuncn Technology Group Co Ltd
Priority to CN201810920399.3A priority Critical patent/CN109005347A/en
Publication of CN109005347A publication Critical patent/CN109005347A/en
Priority to CN201910207912.9A priority patent/CN110830710B/en
Withdrawn legal-status Critical Current

Links

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Lens Barrels (AREA)

Abstract

The invention belongs to video camera focusing technology fields, more particularly to a kind of assisted focused method of overlength zoom lens, mainly pass through an automatic range unit, distance of the acquisition video camera to target point, then the focal length value foucs under different distance, difference zoom is tested out by experiment, then fits relevant calculation formula algorithm.According to relevant calculation formula in this way in program, under known diatance and zoom value, so that it may obtain foucs value, thus can rapidly draw focusing lens to corresponding position, and accuracy is also protected.This programme can effectively solve the problem that overlength zoom lens, due to focal range relevant issues caused greatly.Focusing speed quickly, accurately, it is high to focus success rate；The loss of focus motor is effectively reduced, the camera lens service life is improved.

Description

A kind of assisted focused method of overlength zoom lens
Technical field
The present invention relates to video camera focusing technology field more particularly to a kind of assisted focused methods of overlength zoom lens.
Background technique
Can automatic amasthenic lens focus to obtain clear image automatically, be divided image in image acquisition process The first step of processing is analysed, can followed by motor-driven lens executing agency quickly run to corresponding zoom position.Traditional hand Dynamic focusing mode, relies primarily on the range estimation and hand adjustment of people, not only cumbersome, time-consuming, and adjustment longitude is larger by the subjective impact of people. Therefore, automatic amasthenic lens increasingly has been favored by people.
The type of focusing of overlength zoom lens (focal length > 500mm) at present, the method mainly used are by can be in camera lens In focusing range, camera lens is drawn high by motor first, finds the clearest point of image back and forth by related algorithm.
The shortcomings that prior art: since the focal distance ratio common lens of overlength zoom lens are long very much, so traditional focus method, When motor pulls focusing lens back and forth, focus the spent time can it is longer than common lens very much, simultaneously because overlength is burnt The multiplying power scope of camera lens is big, and when from most wide-angle zoom to most focal length, the range that focusing lens are drawn high will be become very large, Along with the field angle of most wide-angle is narrow, quick zoom is to long defocused characteristics of image almost without the focusing algorithm root of software The focus point of a peak value can not be calculated according to image, at this time motor will push searching back and forth, electrical machinery life is greatly shortened, The problems such as accuracy and success rate focused simultaneously substantially reduces.
Summary of the invention
The purpose of the present invention is to provide a kind of assisted focused methods of overlength zoom lens, to solve existing focus method institute It is slow that there are focusing speeds, focuses the problems such as accuracy is low, focus method provided by the present invention can effectively improve the use of camera lens Service life.
The invention is realized by the following technical scheme:
A kind of assisted focused method of overlength zoom lens obtains video camera to target point by an automatic range unit Distance, focal length value foucs under different object distances distance and different multiplying zoom is then tested out by experiment, is then intended Close out relevant calculation formula algorithm；Further according to relevant calculation formula, at known object distance distance and multiplying power zoom, It obtains focal length value foucs, rapidly draws focusing lens to corresponding position.
It further comprise that the focusing curve under each object distance distance is used into F=a*exp (b*Z)+c*exp (d*Z) Mode be fitted, obtain figure parameters: the value of a, b, c, d, wherein F be focus value, Z be zoom value；
The practical object distance obtained is D0, zoom value is Z0Focus value F (Z0) steps are as follows for calculating:
(1) practical object distance D is first calculated0The two neighbouring Critical length D in left and right1And D2Focus value Fx (Z0) and Fy (Z0), D1<D0<D2,
Fx(Z0)=a1*exp(b1*Z0)+c1*exp(d1*Z0)
Fy(Z0)=a2*exp(b2*Z0)+c2*exp(d2*Z0)
Wherein, a1、b1、c1、d1And a2、b2、c2、d2Respectively Critical length D1And D2Figure parameters；
(2) Fx (Z is utilized0) and Fy (Z0) difference calculate D0The focus value at place:
F(Z0)=Fx (Z0)+(Fx(Z0)-Fy(Z0)) * λ, wherein λ is preset parameter, λ=(D0-D1)/(D2-D1)。
Preferably, if object distance distance is greater than maximum object distance i.e. 1200 meter, directly calculating focus value at 1200 meters is It can.
Preferably, object distance distance is obtained in real time by distance measuring sensor.
Preferably, multiplying power zoom and focal length value foucs is obtained by closed-loop control electric system.
Preferably, obtain experiment test related data, under same zoom value, change object distance distance, respectively every A distance tests current focus value foucs, makes a record.
Preferably, the maximum distance of the camera lens test of different focal lengths is also different, according to the focal length value foucs of return Depending on, it is critical as testing when foucs no longer changes.
Preferably, test data of experiment is emulated by Matlab.
Preferably, Curve Fitting Tool is used to establish using distance as X-axis, using zoom step number as Y-axis, Using focus as the three-dimensional image of Z axis.
Preferably, the target for making camera lens and distance measuring sensor together is mounted side by side in relevant distance measuring sensor and camera lens Object is consistent as far as possible.
Compared with prior art, the present invention at least has the following beneficial effects or advantage:
The assisted focused method of overlength zoom lens provided by the invention effectively solves overlength zoom lens, due to focal range Relevant issues caused by big；Focusing speed is quick, and it is accurate to focus, and it is high to focus success rate；The loss for effectively reducing focus motor, mentions The high service life of camera lens.
Detailed description of the invention
The present invention is described in further details below with reference to attached drawing；
Fig. 1 is automatic range unit structure chart of the invention；
Fig. 2 is the three-dimensional space data figure of the invention based on Distance, Zoom and Focus.
Specific embodiment
Present invention is further described in detail combined with specific embodiments below and referring to attached drawing.
This programme provides a kind of assisted focused method of overlength zoom lens.Mainly pass through a kind of device of automatic range, Video camera is obtained to the distance of target point, different object distances (distance), different multiplying (zoom) are then tested out by experiment Under, focal length value (foucs), then fit relevant calculation formula algorithm.According to relevant calculation formula in this way in program, Under known diatance and zoom value, so that it may obtain foucs value, thus can rapidly draw focusing lens to corresponding Position, and accuracy is also protected.The specific method is as follows:
1, experimental data obtains: can be installed together side by side with camera lens by relevant distance measuring sensor first, by mirror The object of head and sensor is consistent as far as possible.In this way distance is obtained by sensor in real time, passes through closed-loop control electricity Machine system obtains zoom and foucs, and range unit is as shown in Figure 1.
2, it tests test related data: under same zoom (Z) value, changing object distance distance (D), respectively every one section Distance test current foucs (F) value, makes a record.The maximum distance tested according to the camera lens of different focal lengths is also different, Depending on returning to foucs value, when foucs no longer changes as critical.Experimental data is as shown in table 1, table 2, table 3, table 4:
Table 1
Z\F\D 5300 90000 21000 125000 200000 500000 1200000
17410 3314 3311 3308 3317 3313 3308 3300
17268 3327 3324 3321 3317 3316 3315 3313
16788 3397 3394 3391 3379 3379 3381 3383
16329 3397 3419 3447 3467 3463 3457 3448
15888 3532 3509 3483 3516 3516 3518 3521
15463 3601 3594 3586 3581 3584 3590 3599
15053 3658 3664 3673 3664 3661 3657 3651
14655 3722 3688 3647 3729 3729 3729 3729
14269 3792 3770 3745 3794 3794 3794 3794
13892 3862 3854 3845 3859 3859 3859 3859
13525 3919 3919 3921 3898 3902 3911 3924
13166 3976 3975 3974 3962 3964 3969 3976
12815 4046 4023 3995 4027 4029 4034 4041
12471 4116 4074 4023 4092 4092 4092 4093
12133 4173 4172 4172 4157 4156 4155 4154
11801 4243 4234 4225 4222 4222 4223 4224
Table 2
Z\F\D 5300 90000 21000 125000 200000 500000 1200000
11476 4313 4306 4298 4287 4285 4284 4282
11156 4370 4355 4338 4365 4363 4360 4356
10843 4445 4433 4420 4430 4426 4421 4413
10535 4510 4500 4488 4495 4493 4491 4488
10233 4575 4568 4561 4560 4557 4552 4545
9937 4627 4621 4614 4625 4619 4610 4595
9647 4709 4703 4696 4690 4686 4681 4672
9363 4779 4759 4735 4755 4751 4744 4733
9085 4823 4820 4818 4809 4811 4816 4824
8813 4901 4887 4871 4861 4862 4864 4868
8547 4984 4960 4931 4926 4930 4939 4952
8288 5075 5038 4993 4991 4995 5004 5017
8034 5088 5073 5055 5043 5047 5056 5069
7786 5168 5145 5117 5112 5115 5123 5134
7543 5235 5219 5200 5177 5176 5175 5173
7305 5302 5273 5239 5255 5251 5246 5238
7071 5369 5344 5314 5294 5297 5305 5316
6841 5408 5387 5363 5376 5372 5365 5355
6614 5488 5465 5438 5441 5439 5437 5433
6388 5546 5519 5487 5480 5474 5463 5446
6162 5624 5596 5562 5542 5542 5543 5544
5936 5702 5670 5633 5604 5602 5601 5598
5706 5767 5735 5698 5687 5680 5669 5652
5472 5832 5789 5737 5726 5727 5729 5732
5232 5910 5873 5828 5791 5789 5787 5784
4982 5962 5930 5893 5856 5859 5865 5875
4720 6079 6030 5971 5947 5941 5930 5914
4443 6157 6108 6049 6012 6013 6015 6018
4148 6248 6181 6101 6090 6084 6073 6057
3832 6326 6265 6192 6142 6140 6138 6135
3490 6456 6378 6283 6233 6227 6216 6200
3119 6560 6464 6348 6285 6281 6275 6265
2890 6599 6497 6374 6298 6296 6294 6291
2549 6703 6578 6426 6311 6307 6301 6291
2167 6768 6614 6426 6324 6320 6314 6304
1798 6846 6645 6400 6233 6227 6216 6226
1652 6846 6633 6374 6207 6201 6190 6200
1516 6846 6616 6335 6155 6135 6099 6109
1392 6846 6598 6296 6090 6065 6021 6031
1277 6846 6575 6244 6025 6000 5956 5966
1171 6846 6551 6192 5947 5922 5878 5888
1074 6833 6521 6140 5856 5836 5800 5810
Table 3
Z\F\D 5300 90000 21000 125000 200000 500000 1200000
985 6820 6473 6049 5778 5758 5722 5732
903 6807 6448 6010 5713 5684 5631 5641
827 6794 6411 5945 5609 5589 5553 5563
757 6768 6356 5854 5544 5515 5462 5472
693 6742 6313 5789 5440 5415 5371 5381
635 6729 6276 5724 5362 5346 5319 5329
580 6703 6250 5698 5297 5263 5202 5212
530 6677 6189 5594 5193 5164 5111 5121
484 6651 6151 5542 5141 5103 5033 5043
441 6638 6133 5516 5050 5016 4955 4965
401 6612 6089 5451 4972 4938 4877 4887
364 6586 6046 5386 4881 4852 4799 4809
330 6560 6008 5334 4842 4799 4721 4731
298 6521 5963 5282 4777 4743 4682 4692
267 6521 5940 5230 4686 4652 4591 4601
238 6482 5895 5178 4608 4583 4539 4549
211 6482 5871 5126 4543 4518 4474 4484
185 6469 5841 5074 4478 4440 4370 4380
160 6443 5791 4996 4413 4375 4305 4315
136 6417 5771 4983 4361 4314 4227 4237
113 6404 5734 4916 4283 4245 4175 4185
90 6378 5702 4877 4218 4175 4097 4107
69 6365 5669 4819 4153 4110 4032 4042
47 6339 5643 4793 4075 4037 3967 3977
26 6326 5610 4735 4023 3976 3889 3899
6 6300 5567 4673 3958 3911 3824 3834
-15 6274 5535 4633 3880 3851 3798 3808
-35 6261 5498 4566 3815 3763 3668 3678
-54 6235 5492 4585 3763 3702 3590 3600
-74 6222 5429 4461 3711 3641 3512 3522
-93 6183 5378 4395 3594 3542 3447 3457
-112 6170 5379 4414 3542 3481 3369 3379
-131 6157 5318 4294 3464 3408 3304 3314
-150 6131 5276 4232 3360 3304 3200 3210
-168 6105 5240 4184 3295 3234 3122 3132
-186 6079 5195 4115 3191 3130 3018 3028
-204 6053 5161 4072 3100 3039 2927 2937
-221 6040 5129 4016 3035 2974 2862 2872
-238 5988 5063 3933 2957 2901 2797 2807
-255 5988 5043 3890 2866 2791 2654 2664
-271 5975 5011 3834 2749 2688 2576 2586
-287 5949 4972 3778 2671 2601 2472 2482
-302 5923 4932 3722 2619 2544 2407 2417
-316 5897 4898 3679 2515 2436 2290 2300
Table 4
Z\F\D 5300 90000 21000 125000 200000 500000 1200000
-330 5884 4850 3588 2424 2345 2199 2209
-343 5845 4819 3565 2372 2279 2108 2118
-355 5845 4787 3494 2255 2176 2030 2040
-367 5832 4756 3441 2229 2127 1939 1949
-378 5819 4738 3418 2112 2024 1861 1871
-388 5767 4684 3362 2034 1946 1783 1793
-398 5767 4665 3319 1982 1889 1718 1728
-406 5767 4648 3282 1878 1785 1614 1624
-414 5754 4624 3245 1826 1729 1549 1559
-421 5741 4601 3208 1761 1673 1510 1520
-428 5728 4583 3185 1735 1633 1445 1455
-433 5689 4549 3156 1683 1576 1380 1390
-438 5689 4535 3126 1631 1524 1328 1338
-443 5689 4522 3097 1592 1481 1276 1286
-447 5689 4515 3082 1579 1463 1250 1260
-450 5663 4487 3051 1540 1424 1211 1221
-454 5663 4467 3007 1501 1381 1159 1169
-457 5663 4466 3005 1468 1359 1159 1169
-460 5663 4475 3023 1442 1333 1133 1143
-463 5663 4461 2994 1416 1289 1055 1065
-466 5663 4461 2994 1377 1259 1042 1052
-470 5624 4449 3013 1338 1220 1003 1013
-475 5624 4404 2915 1312 1185 951 961
-480 5624 4402 2910 1260 1142 925 935
-487 5624 4386 2874 1221 1085 834 844
-495 5585 4373 2893 1104 977 743 753
-505 5585 4329 2795 1013 882 639 649
-516 5572 4284 2711 922 768 483 493
-520 5559 4263 2680 857 730 496 506
3, fitting experimental data curve obtains calculation formula: the experimental data tested out is imported into Matlab, with Distance is as X-axis, using Zoom step number as Y-axis, using Focus as Z axis, is built using tool Curve Fitting Tool Vertical image, as shown in Figure 2.
The formula model under each Distance is finally obtained through over-fitting.Data processing is as follows:
Focusing curve under each object distance is fitted using the mode of F=a*exp (b*Z)+c*exp (d*Z), is obtained Figure parameters: the value of a, b, c, d, wherein F is focus value (Focus value), and Z is Zoom value；
Matched curve at 5300mm i.e. 5.3 meter are as follows:
F1=7671*exp (- 4.981e-05*Z) -1367*exp (- 0.001027*Z)
Matched curve at 9000mm i.e. 9 meter are as follows:
F2=7565*exp (- 4.882e-05*Z) -2013*exp (- 0.001048*Z)
Matched curve at 21000mm i.e. 21 meter are as follows:
F3=7436*exp (- 4.757e-05*Z) -2801*exp (- 0.001061*Z)
Matched curve at 125000mm i.e. 125 meter are as follows:
F4=7229*exp (- 4.483e-05*Z) -3350*exp (- 0.001221*Z)
Matched curve at 200000mm i.e. 200 meter are as follows:
F5=7210*exp (- 4.459e-05*Z) -3381*exp (- 0.001234*Z)
Matched curve at 500000mm i.e. 500 meter are as follows:
F6=7176*exp (- 4.415e-05*Z) -3438*exp (- 0.001259*Z)
Matched curve at 1200000mm i.e. 1200 meter are as follows:
F7=7170*exp (- 4.408e-05*Z) -3419*exp (- 0.001265*Z)
There is part due to focusing in 5 meters and focus unclear phenomenon (focus close limit), thus can consider object distance 5 meters with Outside.
At this point, using these matched curves, due to Distance (distance measuring sensor acquisition), Zoom (motor control acquisition) Can calculate should control Focus to corresponding value at this time, and at this time image is clearly.
It is 750 meters to calculate Distance, the focus value F (757) that Zoom value is 757, steps are as follows:
(1) it looks into away from knowing 500 < 750 < 1200, therefore calculates focus value at 500 meters and 1200 meters and be respectively as follows:
F6 (757)=7176*exp (- 4.415e-05*757) -3438*exp (- 0.001259*757) ≈ 5615
F7 (757)=7170*exp (- 4.408e-05*757) -3419*exp (- 0.001265*757) ≈ 5622
(2) focus value at 750 meters is calculated using difference after, as follows:
λ=(750-500)/(1200-500) ≈ 0.35
F (757)=F6 (757)+(F6 (757)-F7 (757)) * λ ≈ 5615+ (5622-5615) * 0.35 ≈ 5617
If object distance is greater than 1200 meters, focus value at 1200 meters is directly calculated.
4, program is realized: after obtaining correlation formula model, so that it may realize assisted focused function in a program.
In conclusion this programme reaches fast according to object distance, the method for focal length value test focus value and according to formula model Fast, accurate focus method effectively reduces the loss of focus motor, improves the camera lens service life.Overlength zoom lens are effectively solved, due to coke Away from range relevant issues caused greatly；To realize that focusing speed is quick, it is accurate to focus, the high beneficial effect of success rate is focused.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention Protect range.Without departing from the spirit and scope of the invention, any modification, equivalent substitution, improvement and etc. done also belong to this Within the protection scope of invention.

Claims (10)

1. a kind of assisted focused method of overlength zoom lens, which is characterized in that by an automatic range unit, obtain video camera To the distance of target point, the focal length value under different object distances distance and different multiplying zoom is then tested out by experiment Then foucs fits relevant calculation formula algorithm；Further according to relevant calculation formula, in known object distance distance Under multiplying power zoom, focal length value foucs is obtained, rapidly draw focusing lens to corresponding position.
2. the assisted focused method of overlength zoom lens according to claim 1, which is characterized in that by each object distance Focusing curve under distance is fitted using the mode of F=a*exp (b*Z)+c*exp (d*Z), obtains figure parameters: A, the value of b, c, d, wherein F is focus value, and Z is zoom value；
The practical object distance obtained is D0, zoom value is Z0Focus value F (Z0) steps are as follows for calculating:
(1) practical object distance D is first calculated0The two neighbouring Critical length D in left and right1And D2Focus value Fx (Z0) and Fy (Z0), D1< D0<D2,
Fx(Z0)=a1*exp(b1*Z0)+c1*exp(d1*Z0)
Fy(Z0)=a2*exp(b2*Z0)+c2*exp(d2*Z0)
Wherein, a1、b1、c1、d1And a2、b2、c2、d2Respectively Critical length D1And D2Figure parameters；
(2) Fx (Z is utilized0) and Fy (Z0) difference calculate D0The focus value at place:
F(Z0)=Fx (Z0)+(Fx(Z0)-Fy(Z0))*λ
Wherein, λ is preset parameter, λ=(D0-D1)/(D2-D1)。
3. the assisted focused method of overlength zoom lens according to claim 2, which is characterized in that if object distance distance is big In maximum object distance i.e. 1200 meter, then focus value at 1200 meters is directly calculated.
4. the assisted focused method of overlength zoom lens according to claim 2, which is characterized in that pass through distance measuring sensor reality When obtain object distance distance.
5. the assisted focused method of overlength zoom lens according to claim 2, which is characterized in that pass through closed-loop control motor System obtains multiplying power zoom and focal length value foucs.
6. the assisted focused method of overlength zoom lens according to claim 2, which is characterized in that it is related to obtain experiment test Data change object distance distance under same zoom value, test current focus value foucs every a distance respectively, carry out Record.
7. the assisted focused method of overlength zoom lens according to claim 6, which is characterized in that the camera lens of different focal lengths The maximum distance of test is also different, depending on the focal length value foucs of return, when foucs no longer changes as test It is critical.
8. the assisted focused method of overlength zoom lens according to claim 2, which is characterized in that by Matlab to experiment Test data is emulated.
9. the assisted focused method of overlength zoom lens according to claim 7, which is characterized in that use Curve Fitting Tool is established using distance as X-axis, using zoom step number as Y-axis, using focus as the 3 D stereo of Z axis Image.
10. the assisted focused method of overlength zoom lens according to claim 3, which is characterized in that relevant ranging sensing Device and camera lens, which are mounted side by side, is consistent the object of camera lens and distance measuring sensor as far as possible.
CN201810920399.3A 2018-08-14 2018-08-14 A kind of assisted focused method of overlength zoom lens Withdrawn CN109005347A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201810920399.3A CN109005347A (en) 2018-08-14 2018-08-14 A kind of assisted focused method of overlength zoom lens
CN201910207912.9A CN110830710B (en) 2018-08-14 2019-03-19 Focusing method of ultra-long focal lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810920399.3A CN109005347A (en) 2018-08-14 2018-08-14 A kind of assisted focused method of overlength zoom lens

Publications (1)

Publication Number Publication Date
CN109005347A true CN109005347A (en) 2018-12-14

Family

ID=64595922

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201810920399.3A Withdrawn CN109005347A (en) 2018-08-14 2018-08-14 A kind of assisted focused method of overlength zoom lens
CN201910207912.9A Active CN110830710B (en) 2018-08-14 2019-03-19 Focusing method of ultra-long focal lens

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201910207912.9A Active CN110830710B (en) 2018-08-14 2019-03-19 Focusing method of ultra-long focal lens

Country Status (1)

Country Link
CN (2) CN109005347A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110572577A (en) * 2019-09-24 2019-12-13 浙江大华技术股份有限公司 Method, device, equipment and medium for tracking and focusing
CN110958387A (en) * 2019-11-19 2020-04-03 维沃移动通信有限公司 Content updating method and electronic equipment
CN111818261A (en) * 2020-07-07 2020-10-23 深圳市中江天华科技有限公司 Automatic focusing method and system based on flight time

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021244550A1 (en) * 2020-06-01 2021-12-09 王浩 Automatic focusing apparatus and focusing method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001305426A (en) * 2000-04-21 2001-10-31 Sony Corp Zoom lens and image pickup unit
TWI403818B (en) * 2009-07-07 2013-08-01 Univ Nat Taiwan Method of automated focus
CN104202518A (en) * 2014-08-25 2014-12-10 深圳市菲特数码技术有限公司 Zooming method and system of integrated video camera
CN105554387A (en) * 2015-12-23 2016-05-04 北京奇虎科技有限公司 Zoom tracking curve correction method and device
CN107529011B (en) * 2017-08-23 2018-07-10 珠海安联锐视科技股份有限公司 A kind of motorized zoom lens control method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110572577A (en) * 2019-09-24 2019-12-13 浙江大华技术股份有限公司 Method, device, equipment and medium for tracking and focusing
CN110572577B (en) * 2019-09-24 2021-04-16 浙江大华技术股份有限公司 Method, device, equipment and medium for tracking and focusing
CN110958387A (en) * 2019-11-19 2020-04-03 维沃移动通信有限公司 Content updating method and electronic equipment
CN111818261A (en) * 2020-07-07 2020-10-23 深圳市中江天华科技有限公司 Automatic focusing method and system based on flight time

Also Published As

Publication number Publication date
CN110830710A (en) 2020-02-21
CN110830710B (en) 2023-07-11

Similar Documents

Publication Publication Date Title
CN109005347A (en) A kind of assisted focused method of overlength zoom lens
CN103674839B (en) A kind of visual Sample location operating system based on spot detection and method
CN106500846B (en) A kind of asymmetric correction method of infrared imaging system
CN111932636B (en) Calibration and image correction method and device for binocular camera, storage medium, terminal and intelligent equipment
WO2011125937A1 (en) Calibration data selection device, method of selection, selection program, and three dimensional position measuring device
CN102436660A (en) Automatic correction method and device of 3D camera image
CN101231158A (en) Device for fast detecting exiguity object three-dimensional contour dimension based on liquid zoom lens
CN111598931B (en) Monocular vision system imaging parameter calibration device and method
CN103029131A (en) Mechanical arm motion control system and mechanical arm motion control method
CN112019751B (en) Calibration information based automatic focusing method
CN103323216B (en) A kind of device and method detecting parallax error of collimator
CN104834081B (en) Rapid automatic focusing method for stereoscopic microscope
CN113820020A (en) Binocular camera infrared temperature measurement method and device and computer equipment
CN106686373B (en) Automatic focusing test system and method
CN109389648B (en) Method for reducing measurement data error through data iteration
CN109443202A (en) A kind of measurement method of scene data
KR20110133677A (en) Method and apparatus for processing 3d image
KR102547717B1 (en) multi-focus contents generation simulation apparatus using 3D engine development and method therefor
CN114155289A (en) Electric spark contour dimension measuring method of electric ignition system based on binocular vision
CN103226059A (en) Wavefront measuring device and measuring method for optical system
CN105136315A (en) Real-time quantification phase retrieval apparatus
KR101749801B1 (en) Vision thermal analysis control system
KR102062634B1 (en) Apparatus and method for measuring dip of power line
KR20170122508A (en) Coordination guide method and system based on multiple marker
CN108960096B (en) Human body identification method based on stereoscopic vision and infrared imaging

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20181214