CN102025909A - Image acquisition device and method for judging re-execution of automatic focusing thereby - Google Patents
Image acquisition device and method for judging re-execution of automatic focusing thereby Download PDFInfo
- Publication number
- CN102025909A CN102025909A CN2009101703569A CN200910170356A CN102025909A CN 102025909 A CN102025909 A CN 102025909A CN 2009101703569 A CN2009101703569 A CN 2009101703569A CN 200910170356 A CN200910170356 A CN 200910170356A CN 102025909 A CN102025909 A CN 102025909A
- Authority
- CN
- China
- Prior art keywords
- numerical value
- automatic
- image
- collecting device
- focusing
- 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.)
- Pending
Links
Images
Landscapes
- Studio Devices (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
The invention relates to an image acquisition device and a method for judging re-execution of automatic focusing thereby. The image acquisition device comprises an image sensor, a register and a back-end chip, wherein the back-end chip judges whether the image acquisition device re-executes the automatic focusing action by using automatic exposure value variation and automatic gain value variation in a focusing environment. The invention has the advantages of preventing over-frequent focusing action of the image acquisition device and effectively focusing the image acquisition device on a video environment.
Description
Technical field
The present invention relates to the IMAQ field, relate in particular to a kind of image collecting device and judge whether to re-execute the method for automatic focusing.
Background technology
Along with networks development, video-signal system is widely used in the daily life, makes the user who is positioned at different cities, country carry out session discussing by video signal, therefore can save the cost that needs cost originally face to face in order to talk.Generally speaking, the user utilizes computer to carry out the network communication program when carrying out video conference, the IP Camera of computer can be gathered the image of this end subscriber, and transfer in the other end user's computer by the image of network communication program with this end subscriber, screen or image output device by other end user's computer plays back this image again, and other end user also transfers to this end subscriber by same way as with image, is carried out video conference in many ways whereby.
Wherein, the quality of image will be one of whether smooth key factor of video conference.IP Camera now mostly is equiped with autofocus lens, and its collocation is focusing control rule automatically, makes IP Camera can gather more clear sharp keen image.The existing automatic control rule of focusing utilizes the change of lens focus to calculate the interior edge definition in focusing zone, and focuses in the position of searching maximum image marginal definition.In addition, be to set a threshold values in the focusing control rule automatically, when edge definition was lower than this threshold values, IP Camera then re-executed the action of automatic focusing.
Yet the existing automatic focusing control rule that is applied to IP Camera can't be done effectively and objectively to analyze to the sensitivity of IP Camera start.For instance, when the threshold values of setting in the automatic focusing control rule is too high, if the environment in the video conference is simple the rocking of arbitrary object (cup, notebook, stationery etc.), also can cause IP Camera to re-execute the action of automatic focusing, will cause visual uncomfortablely thus for the participant of conference participation, even feel dizzy; But the threshold values of setting in the control rule if focus is automatically crossed when hanging down, and with making that the start sensitivity of focusing automatically is low excessively, causes IP Camera effectively to focus in the video signal environment.
Summary of the invention
The technical problem to be solved in the present invention is, at the prior art above shortcomings, provide a kind of action of can avoiding focusing too frequent and can focus in the image collecting device of video signal environment effectively and judge whether to re-execute the method for automatic focusing.
The technical solution adopted for the present invention to solve the technical problems provides a kind of method that judges whether to re-execute automatic focusing, is applied to image collecting device, and it comprises the steps:
Obtain the first automatic exposure numerical value AE
V1With the first automatic gain numerical value AG
V1
After time, obtain the second automatic exposure numerical value AE in fixed interval
V2With the second automatic gain numerical value AG
V2
Compare the first automatic exposure numerical value AE
V1With the second automatic exposure numerical value AE
V2, and obtain automatic exposure numerical value change amount | AE
V1-AE
V2|; And
Compare the first automatic gain numerical value AG
V1With the second automatic gain numerical value AG
V2, and obtain automatic gain numerical value change amount | AG
V1-AG
V2|;
Wherein, when automatic exposure numerical value change amount | AE
V1-AE
V2| greater than threshold value P and automatic gain numerical value change amount | AG
V2-AG
V2| during greater than another threshold value Q, this image collecting device re-executes automatic focusing action.
This image collector is changed to IP Camera.
This image collector is changed to digital camera.
The present invention also provides a kind of image collecting device that judges whether to re-execute automatic focus function that has, and comprising:
Imageing sensor is in order to the automatic exposure numerical value AE of sensing image
VWith automatic gain numerical value AG
V
Register is in order to store this automatic exposure numerical value AE
VWith this automatic gain numerical value AG
VAnd
Back-end chip obtains this automatic exposure numerical value AE in the register in order to set time at interval
VWith this automatic gain numerical value AG
V, and calculate interior automatic exposure numerical value change amount Δ AE of this set time
VWith automatic gain numerical value change amount Δ AG
V
Wherein, as automatic exposure numerical value change amount Δ AE
VGreater than threshold value P and automatic gain numerical value change amount Δ AG
VDuring greater than another threshold value Q, this back-end chip judges that this image collecting device re-executes the action of automatic focusing.
This register is arranged in this imageing sensor.
This image collecting device is sent to image display device by USB with image.
This image collector is changed to IP Camera.
This image collector is changed to digital camera.
Because in the focusing environment of image collecting device, rocking of object, as slight the rocking or cup of human body, notebook, moving of article such as stationery, can't make automatic exposure numerical value and automatic gain numerical value produce a large amount of variations, and image collecting device that the present invention adopts and method are to utilize automatic exposure numerical value change amount and automatic gain numerical value change amount to be used as judging whether to re-execute the foundation of automatic focusing action, therefore, can avoid the focusing action of image collecting device too frequent, image collecting device is focused effectively in the video signal environment.
Description of drawings
Fig. 1 is the video conference schematic diagram of preferred embodiment of the present invention;
Fig. 2 is the calcspar of the image collecting device of preferred embodiment of the present invention;
Fig. 3 judges whether to re-execute the flow chart of the method for automatic focusing for preferred embodiment of the present invention.
Embodiment
The mode of carrying out of video conference at first is described, sees also Fig. 1, it is the video conference schematic diagram of preferred embodiment of the present invention.Video conference comprises a plurality of participants 101 and participant 302, and wherein participant 101 is positioned at different places with participant 302.Participant 101 is positioned at A end meeting room among Fig. 1, and participant 302 is positioned at B end meeting room.A end meeting room comprises conference table 100, and an image collecting device 102 in order to the image of gathering A end ring border, and wherein, the image in A end ring border comprises the article 103 that must use in A end meeting participant 101 and any meeting.Image collecting device 102 can be an IP Camera, and link with computer 104, so the image that IP Camera is gathered can transmit the image that A holds in the computer screen 301 of B end the state that the meeting participant 302 that B is held can watch A to hold meeting to carry out via computer 104 and network communication program.Similarly, the meeting participant 302 of B end also makes the ambient image 300 of in a like fashion B being held be sent in the computer screen 1041 of A end, and the meeting participant 101 of A end also can be amplified on the screen 400 ambient image 300 projections of B end in order to watching.
Now with Fig. 2 and Fig. 3 invention spirit of the present invention is described again.See also Fig. 2, it is the calcspar of the image collecting device of preferred embodiment of the present invention.Image collecting device 1 comprises imageing sensor 10, register 11 and back-end chip 12, and the image of image collecting device 1 being gathered via USB 2 is sent to image display device 3, makes image information be played in image display device 3.Wherein, imageing sensor 10 is in order to the variable parameter in the detecting focusing environment, and this variable parameter comprises automatic exposure numerical value AE
VWith automatic gain numerical value AG
V
The focusing environmental variations will make automatic exposure numerical value AE
VWith automatic gain numerical value AG
VAlso produce to change, make image frame appropriateness that image collecting device 1 gathered be played out.For instance, if shooting environmental is crossed when dark automatic exposure numerical value AE
VWith automatic gain numerical value AG
VWill increase, make the image frame blast, otherwise, if shooting environmental is crossed when bright automatic exposure numerical value AE
VWith automatic gain numerical value AG
VThen can reduce and make the image frame deepening.
In addition, register 11 is used for the automatic exposure numerical value AE that store images transducer 10 is detected
VWith automatic gain numerical value AG
V, and register 11 is arranged in the imageing sensor 10.And rear end chip 12 is obtained automatic exposure numerical value AE in the register 11 in order to set time at interval
VWith automatic gain numerical value AG
V, and judge whether image collecting device 1 re-executes the action of automatic focusing.
Next illustrate how back-end chip judges whether image collecting device re-executes the action of automatic focusing, sees also Fig. 3, it judges whether to re-execute the flow chart of the method for automatic focusing for preferred embodiment of the present invention.
Step S1 utilizes back-end chip 12 to obtain the first automatic exposure numerical value AE in the register 11
V1With the first automatic gain numerical value AG
V1
Step S2 after one set time of interval, utilizes back-end chip 12 to obtain the second automatic exposure numerical value AE in the register 11
V2With the second automatic gain numerical value AG
V2
Step S3 utilizes the relatively first automatic exposure numerical value AE of back-end chip 12
V1With the second automatic exposure numerical value AE
V2, and obtain an automatic exposure numerical value change amount Δ AE
V=| AE
V1-AE
V2|;
Step S4 utilizes the relatively first automatic gain numerical value AG of back-end chip 12
V1With the second automatic gain numerical value AG
V2, and obtain an automatic gain numerical value change amount Δ AG
V=| AG
V1-AG
V2|;
Step S5, back-end chip 12 is according to automatic exposure numerical value change amount | AE
V1-AE
V2| with automatic gain numerical value change amount | AG
V1-AG
V2| size and judge whether image collecting device 1 re-executes the action of automatic focusing, wherein, when automatic exposure numerical value change amount | AE
V1-AE
V2| greater than a threshold value P and automatic gain numerical value change amount | AG
V1-AG
V2| during greater than another threshold value Q, image collecting device 1 re-executes automatic focusing action.
What specify is, because in the focusing environment of image collecting device 1, human body is slight rocks or moving of article such as cup, notebook, stationery can't make automatic exposure numerical value AE
VAnd automatic gain numerical value AG
VProduce a large amount of variations, no matter be that IP Camera or digital camera etc. are applied to the image collecting device 1 of video meeting system therefore, if utilize automatic exposure numerical value change amount Δ AE
V=| AE
V1-AE
V2| with automatic gain numerical value change amount Δ AG
V=| AG
V1-AG
V2| be used as judging whether to re-execute the foundation of automatic focusing action, can avoid the focusing action of image collecting device 1 too frequent, image collecting device 1 is effectively focused in the video signal environment.
The above is preferred embodiment of the present invention only, is not in order to limiting claim of the present invention, and therefore all other do not break away from the equivalence of being finished under the disclosed spirit and change or modify, and all should be contained in the claim of the present invention.
Claims (8)
1. a method that judges whether to re-execute automatic focusing is applied to an image collecting device, it is characterized in that, this method comprises the steps:
Obtain the first automatic exposure numerical value AE
V1With the first automatic gain numerical value AG
V1
After one set time of interval, obtain the second automatic exposure numerical value AE
V2With the second automatic gain numerical value AG
V2
This first automatic exposure numerical value AE relatively
V1With this second automatic exposure numerical value AE
V2, and obtain an automatic exposure numerical value change amount | AE
V1-AE
V2|; And
This first automatic gain numerical value AG relatively
V1With this second automatic gain numerical value AG
V2, and obtain an automatic gain numerical value change amount | AG
V1-AG
V2|;
Wherein, when this automatic exposure numerical value change amount | AE
V1-AE
V2| greater than a threshold value P and this automatic gain numerical value change amount | AG
V2-AG
V2| during greater than another threshold value Q, this image collecting device re-executes automatic focusing action.
2. the method that judges whether to re-execute automatic focusing as claimed in claim 1 is characterized in that: this image collector is changed to IP Camera.
3. the method that judges whether to re-execute automatic focusing as claimed in claim 1 is characterized in that: this image collector is changed to digital camera.
4. one kind has the image collecting device that judges whether to re-execute automatic focus function, it is characterized in that, comprising:
Imageing sensor is in order to an automatic exposure numerical value AE of sensing one image
VWith an automatic gain numerical value AG
V
Register is in order to store this automatic exposure numerical value AE
VWith this automatic gain numerical value AG
VAnd
Back-end chip obtains this automatic exposure numerical value AE in this register in order to set time at interval
VWith this automatic gain numerical value AG
V, and calculate an interior automatic exposure numerical value change amount Δ AE of this set time
VWith an automatic gain numerical value change amount Δ AG
V
Wherein, as this automatic exposure numerical value change amount Δ AE
VGreater than a threshold value P and this automatic gain numerical value change amount Δ AG
VDuring greater than another threshold value Q, this back-end chip judges that this image collecting device re-executes the action of automatic focusing.
5. as claimed in claim 4 have an image collecting device that judges whether to re-execute automatic focus function, and it is characterized in that: this register is arranged in this imageing sensor.
6. as claimed in claim 4 have an image collecting device that judges whether to re-execute automatic focus function, it is characterized in that: by USB this image is sent to an image display device.
7. as claimed in claim 4 have an image collecting device that judges whether to re-execute automatic focus function, it is characterized in that: be IP Camera.
8. as claimed in claim 4 have an image collecting device that judges whether to re-execute automatic focus function, it is characterized in that; Be digital camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101703569A CN102025909A (en) | 2009-09-11 | 2009-09-11 | Image acquisition device and method for judging re-execution of automatic focusing thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101703569A CN102025909A (en) | 2009-09-11 | 2009-09-11 | Image acquisition device and method for judging re-execution of automatic focusing thereby |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102025909A true CN102025909A (en) | 2011-04-20 |
Family
ID=43866699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101703569A Pending CN102025909A (en) | 2009-09-11 | 2009-09-11 | Image acquisition device and method for judging re-execution of automatic focusing thereby |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102025909A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI580271B (en) * | 2016-01-25 | 2017-04-21 | 佳世達科技股份有限公司 | Light sensing display system and method for operating a light sensing display system |
| TWI596943B (en) * | 2016-06-23 | 2017-08-21 | 恆景科技股份有限公司 | Auto exposure control system |
| US9871972B2 (en) | 2016-06-21 | 2018-01-16 | Himax Imaging Limited | Auto exposure control system and method |
| CN113114947A (en) * | 2021-04-20 | 2021-07-13 | 重庆紫光华山智安科技有限公司 | Focusing adjustment method and device, electronic equipment and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1176725A (en) * | 1995-01-05 | 1998-03-18 | 汤姆森消费电子有限公司 | Electronic recording camera with optimized power consumption |
| US20090115887A1 (en) * | 2007-11-02 | 2009-05-07 | Fujifilm Corporation | Imaging apparatus and method |
-
2009
- 2009-09-11 CN CN2009101703569A patent/CN102025909A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1176725A (en) * | 1995-01-05 | 1998-03-18 | 汤姆森消费电子有限公司 | Electronic recording camera with optimized power consumption |
| US20090115887A1 (en) * | 2007-11-02 | 2009-05-07 | Fujifilm Corporation | Imaging apparatus and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI580271B (en) * | 2016-01-25 | 2017-04-21 | 佳世達科技股份有限公司 | Light sensing display system and method for operating a light sensing display system |
| US9871972B2 (en) | 2016-06-21 | 2018-01-16 | Himax Imaging Limited | Auto exposure control system and method |
| TWI596943B (en) * | 2016-06-23 | 2017-08-21 | 恆景科技股份有限公司 | Auto exposure control system |
| CN113114947A (en) * | 2021-04-20 | 2021-07-13 | 重庆紫光华山智安科技有限公司 | Focusing adjustment method and device, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103491299B (en) | One is taken pictures treating method and apparatus | |
| US10277798B2 (en) | Multiple lenses system, operation method and electronic device employing the same | |
| CN104219785B (en) | Real-time video providing method, device and server, terminal device | |
| US7990421B2 (en) | Arrangement and method relating to an image recording device | |
| CN104822038A (en) | Recording and broadcasting system and picture switching method thereof | |
| CN103945121A (en) | Information processing method and electronic equipment | |
| CN106104663A (en) | For setting the system and method for the display brightness of the display of electronic equipment | |
| EP3261330A1 (en) | Method and apparatus for setting camera parameter | |
| CN106412291A (en) | Equipment control method and mobile terminal | |
| CN105513030A (en) | Information processing method and apparatus, and electronic equipment | |
| CN102361493A (en) | Mobile terminal and method for setting address list head portrait | |
| CN106210495A (en) | Image capturing method and device | |
| CN102025909A (en) | Image acquisition device and method for judging re-execution of automatic focusing thereby | |
| CN104992478A (en) | Method for providing student attendance status | |
| CN110677734A (en) | Video synthesis method and device, electronic equipment and storage medium | |
| CN104284128A (en) | Electronic device and video tagging method | |
| CN105931239A (en) | Image processing method and device | |
| KR20160031994A (en) | Method and device for sending message | |
| CN111247787A (en) | Photographing method and photographing terminal | |
| CN107105311A (en) | Live broadcasting method and device | |
| CN101598978B (en) | Mouse with camera shooting function | |
| CN113315913A (en) | Image sensor control method and related product | |
| CN102843508B (en) | image capturing method and image capturing system | |
| CN102223472B (en) | Method for indicating user to judge if the lens of image acquisition device parallel to the subject | |
| CN115499537B (en) | Microphone control method and device, mobile terminal and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110420 |