CN106878622A - A kind of automatic focusing processing system and processing method - Google Patents
A kind of automatic focusing processing system and processing method Download PDFInfo
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- CN106878622A CN106878622A CN201710260183.4A CN201710260183A CN106878622A CN 106878622 A CN106878622 A CN 106878622A CN 201710260183 A CN201710260183 A CN 201710260183A CN 106878622 A CN106878622 A CN 106878622A
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
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- Engineering & Computer Science (AREA)
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- Automatic Focus Adjustment (AREA)
Abstract
A kind of automatic focusing processing system and processing method, are related to camera module focusing field, solve the problems, such as that the repeated, efficiency poor with stability of the existing video camera for using artificial focusing to exist is low.The present invention is transferred to fpga chip and carries out Computer Vision after being decoded to the vision signal being input into including video decoding chip；Fpga chip gathers position feedback information to judge the execution state of current automatic focusing processing system by control chip of focusing, and by focusing, control chip driving automatic focusing processing system carries out automatic focusing work；Video coding chip to being processed through fpga chip after vision signal encode after export to remote computer；Fpga chip performs the control command of remote computer by communication interface chip, and remote computer carries out upgrading processing by communication interface chip to fpga chip.Focusing accuracy of the present invention is high, flexible and convenient to use, small volume, power consumption and low cost.
Description
Technical field
The present invention relates to camera module focusing technical field, and in particular to a kind of automatic focusing processing system and treatment side
Method.
Background technology
Technology of auto constantly develops along with the birth of imaging detector, is distinguished from its general principle, from
Dynamic focus technique mainly has telemetry, focus detection method and image treating, because first two method all depends critically upon imaging
Structure and detector, so as to limit its popularization and application.With continuing to develop for computer technology and image processing techniques, it is based on
The automatic focusing of image processing techniques quickly grows, and this depends on the flexibility of image processing techniques, can be wanted for different use
Asking quickly and accurately focus.
At present, with the development of embedded technology and focusing algorithm, technology of auto either in structure, or
It is all fairly perfect with focusing algorithm sheet, therefore the most of video cameras of in the market all employ the insertion of integrated focusing function
Formula chip carries out focusing treatment.But, the embedded chip of this integrated focusing function is to adapt to be imaged under normal condition
The focusing action of machine, and in some special occasions, such as in the case that low-light (level), high illumination or scene characteristic are relatively simple,
These video cameras cannot all complete focusing action.Therefore, the video camera applied under some special occasions is still and manually enters
Row focusing, the definition due to different operating personnel to image definition is different with sensation, and this will certainly just cause IMAQ
The otherness of result, especially in the field such as some scientific experiments or industrial production, it will make the repeated of video camera and stabilization
Property have very big difference, while be will also result under conditions of multi-cam focusing efficiency decline.
The content of the invention
In order to solve that the existing video camera repeatability and stability existed using artificial focusing is poor, focus that efficiency is low to ask
Topic, the present invention provides a kind of automatic focusing processing system and processing method.
The present invention is as follows to solve the technical scheme that technical problem is used：
A kind of automatic focusing processing system of the invention, including：
Fpga chip；
The video decoding chip being connected with the video interface of fpga chip and video camera, the vision signal to being input into is carried out
Decoding and be transferred to fpga chip carries out Computer Vision；
It is connected with the feedback element interface of fpga chip, the focusing electric interfaces of focusing motor and position feedback elements
Focusing control chip, the fpga chip gathers the position feedback information of position feedback elements to judge by control chip of focusing
The execution state of current automatic focusing processing system, the fpga chip drives focusing motor so as to drive by control chip of focusing
Dynamic automatic focusing processing system carries out automatic focusing work；
Remote computer；
The video coding chip being connected with fpga chip and remote computer, to being processed through fpga chip after video letter
Number encoded and lossless exported to remote computer；
The communication interface chip being connected with fpga chip and remote computer, the fpga chip passes through communication interface core
Piece performs the control command of remote computer, while remote computer is carried out at upgrading by communication interface chip to fpga chip
Reason.
Further, also include：The memory chip being connected with fpga chip, by store camera video data and based on
Calculate result.
Further, also include：The program and pin-saving chip being connected with fpga chip, for storing focusing treatment journey
The parameters of sequence and automatic focusing processing system.
Further, the concrete model of the video decoding chip is：TVP5150；The specific of control chip of focusing
Model：A3979；The concrete model of the video coding chip is：ADV7123；The concrete model of the communication interface chip
For：MAX485.
Present invention also offers a kind of automatic focusing processing method realized using above-mentioned automatic focusing processing system, bag
Include following steps：
The position feedback information that step one, the fpga chip pass through control chip reading position feedback element of focusing, with
Obtain the execution state and positional information of current automatic focusing processing system；
Step 2, the camera video signal being input into is decoded and by decoded numeral by video decoding chip
Video signal transmission calculates the average focusing evaluation of current position image by fpga chip and focusing algorithm to fpga chip
Function FDavg；
Step 3, the focusing step-length that automatic focusing processing system is set by fpga chip and focusing algorithm, the tune
Burnt step-length is more than focusing accuracy, records and preserve the average focus criteria function F ' of the first two steps image of current locationDavg；
Step 4, F is judged by fpga chipDavgWith F 'DavgBetween relation：If FDavg≥F′Davg, then step is performed
Five；If FDavg＜ F 'Davg, then step 6 is performed；
Step 5, continued to run with along optical axis traffic direction by the camera lens of motor actuated camera of focusing, return to step four；
Step 6, judge focusing step-length whether more than focusing accuracy by fpga chip：If so, then focusing step-length is subtracted
Half, automatic focusing processing system is then driven along the reverse direction operation of optical axis traffic direction, return to step four by motor of focusing；
If it is not, then automatic focusing end-of-job；
Step 7, after automatic focusing end-of-job, the video image of final output can not still meet video camera applied field
During scape demand, then need to be analyzed the application scenarios of video camera and calculate an average tune for meeting system focusing demand
Burnt evaluation function F "Davg；
Step 8, using remote computer by communication interface chip by upgrade data be transferred to fpga chip, it is then right
Fpga chip focusing processing routine in itself carries out upgrading processing；By above-mentioned average focus criteria function F "DavgReplacement step
The average focus criteria function F of the current position image in twoDavg, and continue executing with step one.
The beneficial effects of the invention are as follows：
1st, a kind of automatic focusing processing system of the invention, rich interface is flexible and convenient to use, small volume and power consumption and into
This is low, is easy to the transformation and upgrade of existing system, meets application of special occasions demand.
2nd, a kind of automatic focusing processing method of the invention, step-length increase during rough focusing, step-length reduces when fine tuning is burnt, compares
In existing focusing function calculating speed is fast, high precision.
3rd, a kind of automatic focusing processing method of the invention can be directed to image compared with existing universal processing method
Sharpness evaluation function is average focus criteria function FDavgOptimize, to meet application of special occasions demand.
4th, a kind of compatible focus adjustment method general at present of automatic focusing processing method energy of the invention, while being directed to particular field
The application of conjunction, it additionally provides a kind of extremely convenient upgrading and method to set up, so as to be conducive to the application of technology of auto.
Brief description of the drawings
Fig. 1 is a kind of structured flowchart of automatic focusing processing system of the invention.
Fig. 2 is a kind of concrete structure schematic diagram of automatic focusing processing system of the invention.
Fig. 3 is the structured flowchart of camera interface module.
Fig. 4 is the structured flowchart of automatic focusing processing module.
Fig. 5 is the structured flowchart of signaling interface output module.
Fig. 6 is the position relationship schematic diagram between video camera and automatic focusing processing system of the invention.
In figure：1st, focus motor, 2, position feedback elements, 3, automatic focusing processing system, 4, optical axis, 5, video camera.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in figure 1, a kind of automatic focusing processing system of the invention mainly includes：Camera interface module, automatic tune
Burnt processing module, signaling interface output module.Focusing motor 1 in camera interface module and video camera 5, video camera 5 and
Position feedback elements 2 are connected, and camera interface module is connected with automatic focusing processing module by I/O interface, automatic focusing treatment
Module is connected with signaling interface output module by I/O interface, and signaling interface output module is connected with remote computer and carries out remote
Journey is communicated.As shown in fig. 6, automatic focusing processing system 3 of the invention with video camera 5 when being installed, at automatic focusing
The particular location of reason system 3 has no and is distinctly claimed, it is only necessary to is installed according to being actually needed for system, meets its flexible
The characteristics of.
As shown in Figures 2 and 3, camera interface module includes：Video decoding chip and focusing control chip.Video is decoded
Chip and focusing control chip are connected with automatic focusing processing module, the video interface phase of video decoding chip and video camera 5
Even, focusing control chip with focusing motor 1 focusing electric interfaces be connected, while focusing control chip also with position feedback elements
2 feedback element interface is connected.Camera interface module is the front end of automatic focusing processing system 3 of the invention, primarily to
Video interface, the focusing electric interfaces of focusing motor 1 and the feedback element of position feedback elements 2 for matching original video camera 5 connect
Mouthful.For common video interface at present for example LVDS differential videos interface, CameraLink interfaces, CVBS interfaces, SDI interfaces and
The vision signal of the interfaces such as HDMI output, is decoded and is supplied to automatic by video decoding chip to the vision signal being input into
Focusing processing module carries out Computer Vision；For common at present focusing motor 1 such as direct current generator, Step motor, piezoelectricity
The devices such as ceramics, by focusing, control chip is matched, and focusing motor 1 is accessed automatic focusing processing system 3 to drive it
Carry out automatic focusing work；For common at present position feedback elements 2 such as current potential machine, encoder, optoelectronic switch device, lead to
Cross focusing control chip to be matched, position feedback elements 2 is accessed automatic focusing processing system 3, it is current certainly with Real-time Feedback
The positional information and execution state of dynamic focusing processing system 3, feedback function of the focusing control chip comprising various states.
As shown in figure 4, automatic focusing processing module includes：Fpga chip, memory chip, program and pin-saving chip.
Fpga chip respectively with video decoding chip, focusing control chip, signaling interface output module, memory chip and program and data
Storage chip is connected.Connect by IO between fpga chip and video decoding chip, focusing control chip, signaling interface output module
Mouth is connected.Automatic focusing processing module is mainly carries out the vision signal of video camera 5 using fpga chip as main process task chip
Collection, to carry out differentiation and the focusing algorithm process of image definition.Focusing for the focusing motor 1 to be matched electrically connects
Mouth carries out corresponding driving treatment, while the position feedback information of position feedback elements 2 is gathered, to judge at current automatic focusing
The execution state of reason system 3 for example whether reach it is spacing, whether reach whether requirement position, automatic focusing processing system 3 work
It is normal etc., while fpga chip is communicated with the signaling interface output module of rear end, ordered with the control for performing remote computer
Remote upgrade function of order and fpga chip etc..
The function of memory chip is：The internal storage capacity very little of usual fpga chip, especially for high-resolution
Camera video data, the storage and calculating of camera video data can only be carried out by the memory chip of outside Large Copacity
Storage of result etc., supplements the small shortcoming of the internal memory of fpga chip.
The function of program and pin-saving chip is：The major function of program and pin-saving chip is storage focusing treatment
Program, while for the Some features parameter of automatic focusing processing system 3, such as focussing distance, original position, focusing motor speed
The data storages such as angle value, minimum focusing amount so when focusing processing routine is performed, can be deposited in the chip according to current chip
The data of storage are adjusted.
As shown in figure 5, signaling interface output module includes：Video coding chip and communication interface chip.Video coding core
Piece and communication interface chip are connected with fpga chip by I/O interface, meanwhile, video coding chip and communication interface chip
It is connected with remote computer.Signaling interface output module is mainly as the rear end of automatic focusing processing system 3 of the invention
The vision signal output of matching original video camera 5, the lossless output of the vision signal of the video camera 5 that will be collected or according to
Need to carry out coded treatment output；Also there is the function of being communicated with remote computer simultaneously.Received by remote computer
By the lossless video signal of the video camera 5 after the focusing of automatic focusing processing system 3 treatment, while passing through communication interface chip control
Automatic focusing processing system 3 processed is realized realizing the remote of fpga chip to the focusing function of video camera 5 and by remote computer
Journey upgrade function.
A kind of automatic focusing processing method of the invention mainly includes three parts, and Part I is just to determine original shooting
The video interface of machine 5 and the focusing electric interfaces of focusing motor 1；Part II is to determine the video being connected with remote computer
Coding chip and communication interface chip；Part III is the average focus criteria function F for confirming current position imageDavgIt is whether full
Sufficient application demand.
A kind of automatic focusing processing method of the invention, its detailed process is as follows：
The focusing electric interfaces of step one, the video interface first according to video camera 5 and focusing motor 1, confirm institute in Fig. 3
The video decoding chip of needs and the type selecting of focusing control chip；In present embodiment, video decoding chip concrete model is：
TVP5150, focusing control chip concrete model be：A3979.
Step 2, further according to the demand to video coding chip and communication interface chip, confirm the video wanted needed for Fig. 5
The type selecting of coding chip and communication interface chip；In present embodiment, video coding chip concrete model is：ADV7123, communication
Interface chip concrete model is：MAX485.
Fpga chip in step 3, automatic focusing processing module is by control chip reading position feedback element 2 of focusing
Position feedback information, to obtain the execution state and definite positional information of current automatic focusing processing system 3, as initial
Position is zero-bit.
Step 4, the vision signal of video camera 5 access automatic focusing processing system 3 by video decoding chip, by regarding
Frequency decoding chip is decoded to the vision signal being input into, and the fpga chip in automatic focusing processing module decodes core by video
Piece reads decoded digital video signal, and the average focusing of current position image is calculated by fpga chip and focusing algorithm
Evaluation function FDavg。
Step 5, the focusing step-length that automatic focusing processing system 3 is set by fpga chip and focusing algorithm, it is described
Focusing step-length is more than focusing accuracy, records and preserve the average focus criteria function F ' of the first two steps image of current locationDavg。
Step 6, the average focus criteria function F that current position image is judged by fpga chipDavgWith current location
The average focus criteria function F ' of first two steps imageDavgBetween relation, be as a result divided into two kinds of situations：One is current position image
Average focus criteria function FDavgEqual to or more than the average focus criteria function F ' of the first two steps image of current locationDavg,
Two is the average focus criteria function F of current position imageDavgLess than the average focusing evaluation of the first two steps image of current location
Function F 'Davg。
The first situation：If the average focus criteria function F of current position imageDavgEqual to or more than current location
First two steps image average focus criteria function F 'Davg, then step 7 is performed；
Second situation：If the average focus criteria function F of current position imageDavgLess than the first two steps of current location
The average focus criteria function F ' of imageDavg, then step 8 is performed.
Step 7, continued to run with along the traffic direction of optical axis 4 by the camera lens of the actuated camera 5 of motor 1 of focusing, return to step
Six.
Step 8, the pass for being judged by fpga chip between the focusing step-length of automatic focusing processing system 3 and focusing accuracy
System, is as a result divided into two kinds of situations：One is that focusing step-length is more than focusing accuracy；Two is that focusing step-length is equal to or less than focusing essence
Degree.
The first situation：If focusing step-length is more than focusing accuracy, focusing step-length is halved, then by motor of focusing
1 drives automatic focusing processing system 3 along the reverse direction operation of the traffic direction of optical axis 4, return to step six；
Second situation：If focusing step-length is equal to or less than focusing accuracy, automatic focusing terminates.
Step 9, when complete step 8 after be automatic focusing end-of-job after, the video of final output is judged by human eye
Image cannot meet the application scenarios demand of video camera 5 when still unintelligible when, then need by professional algorithm personnel to video camera 5
Application scenarios be analyzed, and draw one it is rational, meet system and focus the average focus criteria function F of demand "Davg。
Step 10, when complete step 9 after, using remote computer by communication interface chip by upgrading data be transferred to
Fpga chip, then the focusing processing routine to fpga chip in itself carry out upgrading processing；By in step 9 by professional algorithm people
The average focus criteria function F that member calculates "DavgThe average focus criteria function F of current position image in replacement step fourDavg, and
Continue executing with step 3.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of automatic focusing processing system, it is characterised in that including：
Fpga chip；
The video decoding chip being connected with the video interface of fpga chip and video camera, the vision signal to being input into is decoded
And be transferred to fpga chip and carry out Computer Vision；
The focusing being connected with the feedback element interface of fpga chip, the focusing electric interfaces of focusing motor and position feedback elements
Control chip, the fpga chip is current to judge by the position feedback information that control chip of focusing gathers position feedback elements
The execution state of automatic focusing processing system, the fpga chip drives focusing motor so as to drive certainly by control chip of focusing
Dynamic focusing processing system carries out automatic focusing work；
Remote computer；
The video coding chip being connected with fpga chip and remote computer, to being processed through fpga chip after vision signal enter
Row coding simultaneously lossless is exported to remote computer；
The communication interface chip being connected with fpga chip and remote computer, the fpga chip is held by communication interface chip
The control command of row remote computer, while remote computer carries out upgrading processing by communication interface chip to fpga chip.
2. a kind of automatic focusing processing system according to claim 1, it is characterised in that also include：With fpga chip phase
Memory chip even, for storing camera video data and result of calculation.
3. a kind of automatic focusing processing system according to claim 1, it is characterised in that also include：With fpga chip phase
Program even and pin-saving chip, the parameters for storing focusing processing routine and automatic focusing processing system.
4. a kind of automatic focusing processing system according to claim 1, it is characterised in that the tool of the video decoding chip
Body model：TVP5150；It is described focusing control chip concrete model be：A3979；The particular type of the video coding chip
Number it is：ADV7123；The concrete model of the communication interface chip is：MAX485.
5. the automatic focusing treatment realized using a kind of automatic focusing processing system described in any one in Claims 1-4
Method, it is characterised in that comprise the following steps：
The position feedback information that step one, the fpga chip pass through control chip reading position feedback element of focusing, to obtain
The execution state and positional information of current automatic focusing processing system；
Step 2, the camera video signal being input into is decoded and by decoded digital video by video decoding chip
Signal transmission calculates the average focus criteria function of current position image by fpga chip and focusing algorithm to fpga chip
FDavg；
Step 3, the focusing step-length that automatic focusing processing system is set by fpga chip and focusing algorithm, the focusing step
It is long to be more than focusing accuracy, record and preserve the average focus criteria function F ' of the first two steps image of current locationDavg；
Step 4, F is judged by fpga chipDavgWith F 'DavgBetween relation：If FDavg≥F′Davg, then step 5 is performed；If
FDavg＜ F 'Davg, then step 6 is performed；
Step 5, continued to run with along optical axis traffic direction by the camera lens of motor actuated camera of focusing, return to step four；
Step 6, judge focusing step-length whether more than focusing accuracy by fpga chip：If so, then halve focusing step-length, so
Automatic focusing processing system is driven along the reverse direction operation of optical axis traffic direction, return to step four by motor of focusing afterwards；If it is not,
Then automatic focusing end-of-job.
6. a kind of automatic focusing processing method according to claim 5, it is characterised in that further comprising the steps of：
Step 7, after automatic focusing end-of-job, the video image of final output can not still meet video camera application scenarios need
When asking, then need to be analyzed the application scenarios of video camera and calculate an average focusing for meeting system focusing demand and comment
Valency function F "Davg；
Step 8, using remote computer by communication interface chip by upgrade data be transferred to fpga chip, then to FPGA
Chip focusing processing routine in itself carries out upgrading processing；By above-mentioned average focus criteria function F "DavgIn replacement step two
Current position image average focus criteria function FDavg, and continue executing with step one.
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| CN110730308A (en) * | 2019-11-21 | 2020-01-24 | 深圳市圆周率软件科技有限责任公司 | Method for remotely controlling focusing system of camera module |
| CN110855888A (en) * | 2019-11-21 | 2020-02-28 | 深圳市圆周率软件科技有限责任公司 | Method for remotely controlling focusing system of camera module |
| CN110891143A (en) * | 2019-11-21 | 2020-03-17 | 深圳市圆周率软件科技有限责任公司 | System for remotely controlling focusing system of camera module |
| CN115355849A (en) * | 2022-08-22 | 2022-11-18 | 天津理工大学 | Automatic defocusing method based on binocular fringe projection measurement system |
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Application publication date: 20170620 |