CN104469153A - Quick focusing method and system - Google Patents
Quick focusing method and system Download PDFInfo
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- CN104469153A CN104469153A CN201410723736.1A CN201410723736A CN104469153A CN 104469153 A CN104469153 A CN 104469153A CN 201410723736 A CN201410723736 A CN 201410723736A CN 104469153 A CN104469153 A CN 104469153A
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Abstract
The invention provides a quick focusing method and system. The method comprises the following steps that after a camera acquisition module receives a focusing command, the focal point of a focusing component of the camera acquisition module is divided into N equal parts within a set focusing range, wherein N is larger than or equal to 2; at least one picture is shot in each divided region of the N equal parts, the pictures and shooting positions corresponding to the pictures are sent to a monitoring terminal; the definition of the pictures received by the monitoring terminal is recognized, the clearest picture is selected, and a focusing set value is obtained according to the shooting position corresponding to the clearest picture and sent to the camera acquisition module; the optimal set value of the focusing component is adjusted according to the focusing set value received by the camera acquisition module. By means of the technical scheme, quick focusing can be realized, and the focusing accuracy is improved.
Description
Technical field
The present invention relates to technical field of image processing, particularly relate to a kind of focus adjustment method and system fast.
Background technology
The camera of the capture apparatus such as usual digital camera has auto-focusing and manual focus.Along with the development of electronic technology, Autofocus Technology have also been obtained great development, most shooting situation can be adapted to, no matter but how advanced Autofocus Technology now on capture apparatus is, due to the shooting environmental of reality and object ever-changing, time auto-focusing always makes mistakes and is difficult to be competent at.
Be in the patent documentation of 200710032763.4 in the patent No., disclose the focusing of a kind of quick manual, focusing method, the invention provides the focusing of a kind of quick manual, focusing method, " refer to when manual focusing, focusing; do to reduce data volume process to digital camera collection trapping module, the view data obtained after compression processing module only does the process of above-mentioned reduction data volume to digital camera collection trapping module is compressed; View data after compression is transferred to monitoring client by transport module, is carried out decompress(ion) by application software, is displayed the play, and carries out rapid analysis process for user, completes focusing, focusing; After Focussing completes, then digital camera collection trapping module is recovered original setting, carry out normal IMAQ and catch operation ".
Technique scheme, meets the specialty focusing application of special high request to a certain extent, can provide a kind of method efficiently, to meet consumers' demand, complete focusing, focus operation manually more fast.But in actual applications, still there is following technological deficiency in this technical scheme:
First, judge in the program whether focusing is successfully mainly by artificial checking monitoring end image, by reducing acquisition resolution, can improve IMAQ and transmission speed, but also have impact on the accuracy of artificial judgment, thus have impact on focus effect; Secondly, reducing capture region needs artificial appointed area, reduces focusing efficiency; Finally, the process of focusing checks at monitoring client the image transmitted, and again focus after each judgement, again judge, process is complicated, consuming time long, is unfavorable for quick focusing.
In sum, above-mentioned existing focus adjustment method, during for focusing, focus effect is relatively poor lower with efficiency.
Summary of the invention
Based on this, be necessary for above-mentioned focus effect difference and inefficient problem, a kind of focus adjustment method and system are fast provided.
A kind of focus adjustment method fast, comprises the steps:
After camera collection module receives focusing order, the focus of the focusing component of shooting acquisition module is divided into N equal portions, N >=2 in the focusing range of setting;
In each zoning of described N equal portions, take at least one pictures, the camera site of described picture and correspondence thereof is sent to monitoring client;
The definition of the described picture that monitoring client receives is identified, selects picture the most clearly, and obtain focusing settings according to the camera site of its correspondence, described focusing settings are sent to described camera collection module;
According to the focusing settings that described camera collection termination is received, according to the best settings of the focusing component of described focusing settings adjustment.
A kind of focusing system fast, comprising:
Divide module, for receive focusing order in camera collection module after, the focus of the focusing component of shooting acquisition module is divided into N equal portions, N >=2 in the focusing range of setting;
Taking module, for taking at least one pictures in each zoning of described N equal portions, is sent to monitoring client by the camera site of described picture and correspondence thereof;
Identification module, the definition for the described picture received monitoring client identifies, selects picture the most clearly, and obtains focusing settings according to the camera site of its correspondence, and described focusing settings are sent to described camera collection module;
Focusing module, for the focusing settings received according to described camera collection termination, according to the best settings of the focusing component of described focusing settings adjustment.
Above-mentioned quick focus adjustment method and system, in the focusing range of setting, some equal portions are divided into by the focus of the focusing component by shooting acquisition module, the picture of shooting and the camera site of correspondence thereof are also sent to monitoring client by pictures taken in each zoning, at monitoring client by identifying the definition of picture, select picture the most clearly, again and obtain focusing settings according to the camera site of its correspondence, camera collection end utilizes the best settings of the focusing component of focusing settings adjustment, completes focussing process.The program can realize quick focusing, and improves the accuracy of focusing.
Accompanying drawing explanation
Fig. 1 is quick focus adjustment method flow chart of the present invention;
Fig. 2 divides schematic diagram in focusing range;
Fig. 3 is the divided area schematic diagram obtaining focusing settings;
Fig. 4 is quick focusing system structural representation of the present invention.
Embodiment
Be described in detail below in conjunction with the embodiment of accompanying drawing to quick focus adjustment method of the present invention and system.
Shown in figure 1, Fig. 1 is quick focus adjustment method flow chart of the present invention, comprises the steps:
S101, after camera collection module receives focusing order, is divided into N equal portions, N >=2 by the focus of the focusing component of shooting acquisition module in the focusing range of setting.
In this step, receive the focusing order of monitoring client in camera collection module after, the focus of the focusing component of shooting acquisition module is divided into N equal portions in the focusing range of setting.
For the focusing range of described setting, can determine according to practical situations, be directed to different monitoring scenes, the possible range that it needs an optimal focus position of focusing can be obtained, thus optimal focus position can be found within the scope of this.
As a kind of execution mode, in the possible range situation cannot determining an optimal focus position, can using the most proximal end of the focus of focusing component to distalmost end as searching scope, for the value of N, value is larger, the position of pictures taken is more, needs the picture of shooting larger, finally identifies that accuracy is higher, certainly, concrete value needs determine according to actual conditions, and value is larger, and monitoring client is higher to computational resource requirement needed for picture processing.
S102, takes at least one pictures in each zoning of described N equal portions, and the camera site of described picture and correspondence thereof is sent to monitoring client.
In this step, by dividing pictures taken in position at one of every equal portions, picture only can take one, also multiple can be taken, obtain its camera site when pictures taken, the positional information namely during shooting residing for focus, is then sent to monitoring client by picture and positional information thereof.
Shown in figure 2, Fig. 2 divides schematic diagram in focusing range, suppose using focus most proximal end A to distalmost end B as searching scope, after being divided into N equal portions, in certain position pictures taken in one's duty such as often, picture is obtained and positional information is sent to monitoring client after shooting, in figure positional information can using focus relative to the distance of most proximal end as parameter, as diagram, most proximal end place is 0, when then the camera site of all pictures is exactly its shooting, focus is relative to the distance value of most proximal end, and arrow place is camera site, and respective distances is its camera site (d
1, d
2..., d
n-2, d
n-1, d
n).
S103, identifies the definition of the described picture that monitoring client receives, and selects picture the most clearly, and obtains focusing settings according to the camera site of its correspondence, and described focusing settings are sent to described camera collection module.
In this step, utilize relevant image identification method, identify picture the most clearly, thus determine the picture that optimal focus position is corresponding, because the camera site of picture obtains in advance, get focusing settings by the camera site of picture and correspondence thereof like this, thus optimal focus position can be found rapidly, thus improve focusing speed, and computer software algorithm can be utilized to identify picture fast and accurately, identification accuracy can be improved.
For adopted recognizer, comprise contrast method, phase method, high fdrequency component method, exponential smoothing, threshold value integration method and/or the definition of gray scale difference point-score to described picture identify etc., such algorithm also can connected applications and improvement application, thus improves and identify accuracy.
As the aforementioned camera site according to picture and correspondence thereof gets focusing settings, generally, can directly using camera site corresponding for this picture as focusing settings, a relatively accurate optimal focus position can be determined so fast.Certainly, if need to obtain more accurate optimal focus position, then need to process further to obtain focusing settings to camera site; At this, can compare further according to the picture clarity in former and later two regions, thus determine camera site to reach or after move to obtain focusing settings.
As a kind of execution mode, in order to make focusing meticulousr, more clear, then in the regional extent at the place of picture the most clearly determined, best focusing position can be found out further as focusing settings.
The described camera site according to its correspondence obtains the step of focusing settings, can comprise as follows:
The focus region that picture clarity is the highest is determined in the camera site corresponding according to picture the most clearly, is P equal portions by described focus Region dividing, N >=2; In each zoning of described P equal portions, take at least one pictures, the camera site of described picture and correspondence thereof is sent to monitoring client; The definition of the described picture that monitoring client receives is identified, selects picture the most clearly, and the camera site of its correspondence is sent to described camera collection module as focusing settings.
Shown in figure 3, Fig. 3 is the divided area schematic diagram obtaining focusing settings, suppose that the region determined is N-2 region, then N-2 region is being subdivided into P part, then control end controls camera collection module photograph plurality of pictures again, and then identify, select picture the most clearly, and then get focusing settings, here the number of times repeated can be arranged according to actual conditions, in order to obtain higher focusing accuracy, repeatedly can repeat, this makes it possible to find settings of focusing accurately rapidly.
S104, according to the focusing settings that described camera collection termination is received, according to the best settings of the focusing component of described focusing settings adjustment.
In this step, camera collection termination receives the focusing settings that monitoring client issues, and the best settings of the focusing component utilizing these focusing settings to adjust, complete focussing process.
In the aforementioned embodiment, in step S102 after pictures taken, the picture of shooting and the camera site of correspondence thereof are sent to monitoring client, in the process, can say that picture is directly sent to monitoring client with the form of sequence of pictures, but be directed to different monitor camera devices, because the photo resolution of shooting is different, so the data volume of transmission is also different, meanwhile, if when repeatedly repeating shooting and finding optimal focus position, also may need repeatedly to transmit picture, transmit picture needs itself to expend time in, easily like this reduce focusing efficiency.
Accordingly, in order to improve focusing speed and efficiency further, before picture is sent to monitoring client, sequence of pictures being compressed into video data, so just can be reduced data volume, thus improve transfer rate, and then improve focusing speed, realize focusing fast.
As a kind of execution mode, the picture of shooting and the camera site of correspondence thereof are sent to the process of monitoring client, specifically can comprise the steps:
At camera collection end:
According to picture shooting order, the camera site of described picture and correspondence thereof is compressed into video data, described video data is sent to monitoring client.
At monitoring client:
The described video data that monitoring client receives is carried out being decoded into sequence of pictures, then the definition of described sequence of pictures is identified.
By the scheme of above-described embodiment, quick transmission can be realized, identify fast, improve the effect of technical solution of the present invention in quick focussing process further.
As an embodiment, the monitoring software of monitoring client can be set to monitoring mode and focusing patterns, when needs enter into focusing, namely select to enter focusing patterns, enter quick focusing flow process provided by the invention, realize focusing fast and accurately.
Shown in figure 4, Fig. 4 is quick focusing system structural representation of the present invention, comprising:
Divide module, for receive focusing order in camera collection module after, the focus of the focusing component of shooting acquisition module is divided into N equal portions, N >=2 in the focusing range of setting;
Taking module, for taking at least one pictures in each zoning of described N equal portions, is sent to monitoring client by the camera site of described picture and correspondence thereof;
Identification module, the definition for the described picture received monitoring client identifies, selects picture the most clearly, and obtains focusing settings according to the camera site of its correspondence, and described focusing settings are sent to described camera collection module;
Focusing module, for the focusing settings received according to described camera collection termination, according to the best settings of the focusing component of described focusing settings adjustment.
In one embodiment, when described identification module performs and obtains the function of focusing settings according to the camera site of its correspondence, the focus region that picture clarity is the highest is determined in the camera site be further used for according to picture is corresponding the most clearly, be P equal portions by described focus Region dividing, N >=2; In each zoning of described P equal portions, take at least one pictures, the camera site of described picture and correspondence thereof is sent to monitoring client; The definition of the described picture that monitoring client receives is identified, selects picture the most clearly, and the camera site of its correspondence is sent to described camera collection module as focusing settings.
In one embodiment, when described taking module performs and the camera site of described picture and correspondence thereof is sent to the function of monitoring client, be further used for, according to picture shooting order, the camera site of described picture and correspondence thereof is compressed into video data, described video data is sent to monitoring client;
During the function that the definition performing the described described picture to monitoring client reception identifies, the described video data be further used for monitoring client receives carries out being decoded into sequence of pictures, then identifies the definition of described sequence of pictures.
In one embodiment, adopt contrast method, phase method, high fdrequency component method, exponential smoothing, threshold value integration method and/or the definition of gray scale difference point-score to described picture identify.
In one embodiment, the focusing range of described setting is that the most proximal end of focus is to distalmost end.
Quick focusing system of the present invention and quick focus adjustment method one_to_one corresponding of the present invention, the technical characteristic of setting forth in the embodiment of above-mentioned quick focus adjustment method and beneficial effect thereof are all applicable to, in the embodiment of quick focusing system, hereby state.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a quick focus adjustment method, is characterized in that, comprises the steps:
After camera collection module receives focusing order, the focus of the focusing component of shooting acquisition module is divided into N equal portions, N >=2 in the focusing range of setting;
In each zoning of described N equal portions, take at least one pictures, the camera site of described picture and correspondence thereof is sent to monitoring client;
The definition of the described picture that monitoring client receives is identified, selects picture the most clearly, and obtain focusing settings according to the camera site of its correspondence, described focusing settings are sent to described camera collection module;
According to the focusing settings that described camera collection termination is received, according to the best settings of the focusing component of described focusing settings adjustment.
2. quick focus adjustment method according to claim 1, is characterized in that, the step that the described camera site according to its correspondence obtains focusing settings comprises:
The focus region that picture clarity is the highest is determined in the camera site corresponding according to picture the most clearly, is P equal portions by described focus Region dividing, N >=2; In each zoning of described P equal portions, take at least one pictures, the camera site of described picture and correspondence thereof is sent to monitoring client; The definition of the described picture that monitoring client receives is identified, selects picture the most clearly, and the camera site of its correspondence is sent to described camera collection module as focusing settings.
3. quick focus adjustment method according to claim 1 and 2, is characterized in that, the step that the described camera site by described picture and correspondence thereof is sent to monitoring client comprises:
According to picture shooting order, the camera site of described picture and correspondence thereof is compressed into video data, described video data is sent to monitoring client;
The step that the definition of the described described picture to monitoring client reception identifies comprises:
The described video data that monitoring client receives is carried out being decoded into sequence of pictures, then the definition of described sequence of pictures is identified.
4. quick focus adjustment method according to claim 1 and 2, is characterized in that, adopt contrast method, phase method, high fdrequency component method, exponential smoothing, threshold value integration method and/or the definition of gray scale difference point-score to described picture identify.
5. quick focus adjustment method according to claim 1 and 2, is characterized in that, the focusing range of described setting is that the most proximal end of focus is to distalmost end.
6. a quick focusing system, is characterized in that, comprising:
Divide module, for receive focusing order in camera collection module after, the focus of the focusing component of shooting acquisition module is divided into N equal portions, N >=2 in the focusing range of setting;
Taking module, for taking at least one pictures in each zoning of described N equal portions, is sent to monitoring client by the camera site of described picture and correspondence thereof;
Identification module, the definition for the described picture received monitoring client identifies, selects picture the most clearly, and obtains focusing settings according to the camera site of its correspondence, and described focusing settings are sent to described camera collection module;
Focusing module, for the focusing settings received according to described camera collection termination, according to the best settings of the focusing component of described focusing settings adjustment.
7. quick focusing system according to claim 6, it is characterized in that, when described identification module performs and obtains the function of focusing settings according to the camera site of its correspondence, the focus region that picture clarity is the highest is determined in the camera site be further used for according to picture is corresponding the most clearly, be P equal portions by described focus Region dividing, N >=2; In each zoning of described P equal portions, take at least one pictures, the camera site of described picture and correspondence thereof is sent to monitoring client; The definition of the described picture that monitoring client receives is identified, selects picture the most clearly, and the camera site of its correspondence is sent to described camera collection module as focusing settings.
8. the quick focusing system according to claim 6 or 7, it is characterized in that, when described taking module performs and the camera site of described picture and correspondence thereof is sent to the function of monitoring client, be further used for, according to picture shooting order, the camera site of described picture and correspondence thereof is compressed into video data, described video data is sent to monitoring client;
During the function that the definition performing the described described picture to monitoring client reception identifies, the described video data be further used for monitoring client receives carries out being decoded into sequence of pictures, then identifies the definition of described sequence of pictures.
9. the quick focusing system according to claim 6 or 7, is characterized in that, adopt contrast method, phase method, high fdrequency component method, exponential smoothing, threshold value integration method and/or the definition of gray scale difference point-score to described picture identify.
10. the quick focusing system according to claim 6 or 7, is characterized in that, the focusing range of described setting is that the most proximal end of focus is to distalmost end.
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| CN106878617A (en) * | 2017-03-06 | 2017-06-20 | 中国计量大学 | A kind of focusing method and system |
| CN107168001A (en) * | 2017-07-20 | 2017-09-15 | 京东方科技集团股份有限公司 | Curtain, optical projection system and focus adjustment method |
| CN110365971A (en) * | 2019-07-17 | 2019-10-22 | 上海集成电路研发中心有限公司 | It is a kind of to be automatically positioned the test macro and method most preferably to focus |
| CN111601036A (en) * | 2020-05-27 | 2020-08-28 | 惠州Tcl移动通信有限公司 | Camera focusing method and device, storage medium and mobile terminal |
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