CN102036017A - Method for controlling flashing module - Google Patents
Method for controlling flashing module Download PDFInfo
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- CN102036017A CN102036017A CN2009101789485A CN200910178948A CN102036017A CN 102036017 A CN102036017 A CN 102036017A CN 2009101789485 A CN2009101789485 A CN 2009101789485A CN 200910178948 A CN200910178948 A CN 200910178948A CN 102036017 A CN102036017 A CN 102036017A
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- preflashing
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Abstract
The invention provides a method for controlling flashing modules, comprising the following steps of: firstly, aiming at a shot object, performing a continuous and automatic focusing program; then, calculating the data of the distance and the size of the shot object, and controlling the flashing module to generate corresponding preflashing; when the data is not less than a preset value, controlling the flashing module to generate preflashing with first intensity; when the data is less than the first preset data value, continuously judging whether the data is less than or equal to a second preset data value; when the data is less than or equal to the second preset data value, controlling the flashing module to generate preflashing with second intensity; and when the data is more than the second preset data value, controlling the flashing module to generate preflashing with third intensity. The invention is used for controlling the flashing module in a pick-up device to generate the most correct preflash intensity, so that the pick-up device obtains the most correct image exposure information, and main flashing subsequently generated by the flashing module has no faults so as to provide the most correct flash intensity.
Description
Technical field
The present invention relates to a kind of flash module control method, refer to a kind of preflashing control method that is used for the flash module of a camera head especially.
Background technology
In general camera head, for example, digital camera, flash module are common components, in order to the required light source of reinforcement when making a video recording.Present camera head possesses the function of preflashing (pre-flash) mostly, and utilize the function of preflashing (pre-flash), with the reflection light quantity of feedback subject, thereby determine the distance of subject, and then judge the distance between camera head and the subject.That is before shooting, camera head need carry out the preflashing of secondary earlier, and its action is as follows.At first, camera head captures the picture of subject, and calculates the mean flow rate Y0 of this picture.Then, flash module is with the first energy preflashing, and simultaneously, camera head captures the picture of subject once more, and calculates the mean flow rate Y1 of this picture.Then, flash module is with the second energy preflashing, and simultaneously, camera head captures the picture of subject once more, and calculates the mean flow rate Y2 of this picture.Next, camera head extrapolate according to the difference DELTA Y of mean flow rate Y0, Y1, Y2 and subject between distance D (with reference to TaiWan, China patent I265368).
So, the guide number of flash module be controlled and be adjusted to camera head will according to the distance D of being extrapolated, and lead the required flash intensity of sudden strain of a muscle (main-flash) to determine follow-up flash module, to reach the purpose of accurate exposure.
Yet before each shooting, the flash module in the camera head all needs the preflashing of secondary to judge the distance of subject, so, will cause the waste of electric power, and the user can't be provided enough service time.Simultaneously, owing to need the preflashing of secondary, will elongate user's camera time, and then cause the usefulness of camera head and flash module not good.
In addition, also have digital camera to use the preflashing of a fixed energies, the preflashing of this kind mode will cause under the shooting at close range, the waste of preflashing energy, and, under the wide-long shot, preflashing energy shortage and cause calculating the incorrect shortcoming of the main energy that dodges and take place.
Summary of the invention
In view of this, the invention provides a kind of flash module control method that is applied in the camera head, it is according to photographed person's face size, judged photographed person's distance, again according to photographed person's distance, control the flash module in this camera head, make it produce corresponding preflashing (pre-flash) intensity, to allow camera head obtain the most correct image exposure information, and then make the main sudden strain of a muscle (main-flash) of the follow-up generation of flash module unlikely wrong, so that the most correct flash intensity to be provided.
The flash module control method of preferred embodiment of the present invention is applicable to that one has the camera head of a flash module, and its method step is as follows.At first,, extrapolate a face data according to the size of a photographed person face, then, the control flash module produce one with the corresponding preflashing of face data.
In aforementioned,, then control the preflashing that flash module produces one first intensity when face data during more than or equal to one first predetermined value.In addition, when face data during, judge then whether face data is less than or equal to one second predetermined data value less than first predetermined data value.When face data is less than or equal to second predetermined data value, then control the preflashing that flash module produces one second intensity.In addition, when face data during, then control the preflashing that flash module produces one the 3rd intensity greater than second predetermined data value.
So, when the flash module control method of preferred embodiment of the present invention is applied in traditional camera head, only need provide preflashing once, and this preflashing intensity once is according to face data, that is the size of people's face is judged photographed person's distance.In aforementioned, people's face is long-pending greatly then can know the photographed person by inference and be close-perspective recording, same, and people's face is long-pending little then can know the photographed person by inference and clap for far away.
Therefore, the flash module control method of preferred embodiment of the present invention is in order to control the flash module in this camera head, make it produce the most correct preflashing intensity, to allow camera head obtain the most correct image exposure information, and then make the main sudden strain of a muscle of the follow-up generation of flash module unlikely wrong, so that the most correct flash intensity to be provided.
In sum, the flash module control method of preferred embodiment of the present invention can effectively be improved known technology because the shortcoming of secondary power wastage that preflashing causes and elongation user's camera time.
Above general introduction and ensuing detailed description are all exemplary in nature, are in order to further specify the scope of claim of the present invention.And relevant other objects and advantages of the present invention will be set forth in follow-up explanation and accompanying drawing.
Description of drawings
Fig. 1 is the camera head configuration diagram of preferred embodiment of the present invention;
Fig. 2 is the schematic flow sheet of preferred embodiment of the present invention;
Fig. 3 is another schematic flow sheet of preferred embodiment of the present invention; And
Fig. 4 A to Fig. 4 C is the window image schematic diagram of the camera head of preferred embodiment of the present invention.
Description of reference numerals:
Camera lens module 10
Driver module 11
Photographing module 12
Operating portion 13
Signal processor 14
Storage module 15
Microcontroller 16
Flash module 18
Signal of video signal S1
Image data S11
The image data S12 of numeral kenel
Take signal S2
Control signal S3
Face's detecting focusing frame 19
Embodiment
Please refer to Fig. 1, Fig. 1 is the camera head configuration diagram of preferred embodiment of the present invention.As shown in Figure 1, camera head 1 comprises a camera lens module 10, a driver module 11, a photographing module 12, an operating portion 13, a signal processor 14, a storage module 15, a microcontroller 16 and a flash module 18.Camera lens module 10 is in order to from an object (indicate) acquisition one signal of video signal S1, and signal of video signal S1 is delivered to photographing module 12.Photographing module 12 carries out opto-electronic conversion signal of video signal S1 is converted to an image data S11.
Again with reference to figure 1.Signal processor 14 is obtained the image data S11 that simulates kenel from photographing module 12, and image data S11 is carried out the processing of noise removing and analog-to-digital, and then exports the image data S12 of a digital kenel.The image data S12 of numeral kenel can be stored in storage module 15.Simultaneously, driver module 11 can adopt the real work of one of micro motor, coil (coil) motor or piezoelectricity promoters (piezoelectric actuator), in order to drive camera lens module 10 or photographing module 12, make that driving camera lens module 10 moves to a focusing position with photographing module 12, reaches continuously the function of focusing (continue AF) automatically.
Again with reference to figure 1.Operating portion 13 is taken signal S2 to microcontroller 16 in order to send one, when microcontroller 16 receives shooting signal S2, carry out a continuously automatic focusing program (continue AF procedure), and export a control signal S3 and give driver module 11, drive camera lens module 10 and photographing module 12 in order to driver module 11, reach the continuously automatically function of focusing,, and then obtain the image data S12 of optimal images resolution with the focal length of decision camera head 1.
Cooperate Fig. 1, please refer to Fig. 2.Fig. 2 is the schematic flow sheet of preferred embodiment of the present invention.As shown in Figure 2, when microcontroller 16 is carried out continuously automatically focusing program (continue AF procedure), can produce a focusing parameter (S100).This focusing parameter is a best focusing step number (focus stepnumber), and meaning promptly moves to the step number (position of image resolution the best) of optimum position to focus lens in the photographing module 12.Then, microcontroller 16 takes out image data S12 from storage module 15, and is judged according to image data S12 whether object has a personage face (S101).When object had personage's face, microcontroller 16 was promptly carried out a face size determining program, extrapolated a corresponding face data (S102) according to face size.
Again with reference to figure 1 and Fig. 2.After step S102, microcontroller 16 judges that immediately whether face data is more than or equal to one first predetermined data value (S103), when face data during more than or equal to first predetermined data value, be expressed as " close-perspective recording is taken the photograph " state, microcontroller 16 is promptly controlled flash module 18 and is produced the preflashing of one first intensity and the flash of light (S105) of an IGBT.In addition, when face data during less than first predetermined data value, microcontroller 16 judges then whether face data is less than or equal to one second predetermined data value (S104).In aforementioned, the value of first predetermined data value is greater than second predetermined data value.
Again with reference to figure 1 and Fig. 2.After step S104, when face data is less than or equal to second predetermined data value, be expressed as " the far away shooting " state, microcontroller 16 is controlled flash module 18 immediately and is produced the preflashing of one second intensity and the flash of light (S106) of IGBT.In addition, when face data during greater than second predetermined data value, be expressed as " normal photographing " state, microcontroller 16 promptly can be controlled flash module 18 and produce the preflashing of one the 3rd intensity and the flash of light (S107) of IGBT.In aforementioned, its intensity of the preflashing of first intensity is less than the preflashing of the 3rd intensity, and simultaneously, its intensity of the preflashing of the 3rd intensity is less than the preflashing of second intensity.
Cooperate Fig. 1 and Fig. 2, please refer to Fig. 4 A to Fig. 4 C.Fig. 4 to Fig. 4 C is the window image schematic diagram of the camera head of preferred embodiment of the present invention.In step S102, the microcontroller 16 of camera head 1 of the present invention with the area ratio of a personage face detecting focusing frame 19 and a window image 17 of camera head 1 as the foundation of judging face size.The foundation of the judgement face size of preferred embodiment of the present invention, in advance window image 17 is drawn and be divided into a plurality of image blocks 172, and, the quantity that has an image block 172 with personage's face detecting focusing frame 19 (promptly, face data) foundation of judging as face size, anticipate promptly, the quantity of image block 172 is many more, and then face is big more.
Cooperate Fig. 1 and Fig. 2 again, with reference to figure 4A.Shown in Fig. 4 A, personage's face detecting focusing frame 19 approximately occupy image block 172 sums on the window image 17 half more than (that is, first predetermined data value), therefore, face data will promptly be expressed as " close-perspective recording is taken the photograph " state more than or equal to first predetermined data value.Simultaneously, with reference to figure 4B, personage's face detecting focusing frame 19 approximately occupy image block 172 sums on the window image 17 1/3 (promptly, second predetermined data value) more than, therefore, face data will promptly be expressed as " normal photographing " state greater than second predetermined data value.In addition, with reference to figure 4C, personage's face detecting focusing frame 19 approximately occupy image block 172 sums on the window image 17 1/3 (promptly, second predetermined data value) below, therefore, face data will be less than or equal to second predetermined data value, promptly is expressed as " the far away shooting " state.
Cooperate Fig. 1 and Fig. 2, please refer to Fig. 3.Fig. 3 is another schematic flow sheet of preferred embodiment of the present invention.As shown in Figure 3, after step S101, when object did not have personage's face, microcontroller 16 was according to this focusing parameter, to extrapolate the shooting distance (S110) between camera head 1 and the object.Then, microcontroller 16 judges then whether shooting distance is less than or equal to one first preset distance value (S112), when shooting distance was less than or equal to the first preset distance value, microcontroller 16 was controlled the preflashing (S116) that flash module 18 produces one first intensity immediately.
In addition, when microcontroller 16 is judged shooting distance greater than the first preset distance value, will judge further that whether shooting distance is more than or equal to one second preset distance value (S114).When shooting distance during more than or equal to the second preset distance value, microcontroller 16 is promptly controlled the preflashing (S115) that flash module produces one second intensity.In addition, when shooting distance during less than the second preset distance value, microcontroller 16 is promptly controlled the preflashing (117) that flash module produces one the 3rd intensity.In aforementioned, the value of the first preset distance value is less than the second preset distance value.In addition, its intensity of the preflashing of first intensity is less than the preflashing of the 3rd intensity, and simultaneously, its intensity of the preflashing of the 3rd intensity is less than the preflashing of second intensity.
In sum, flash module control method provided by the invention, it is according to photographed person's face size, judged photographed person's distance,, controlled the flash module in this camera head again according to photographed person's distance, make it produce corresponding preflashing (pre-flash) energy, allowing camera head obtain the most correct image exposure information, and then it is unlikely wrong to allow the follow-up generation of flash module main dodge (main-flash), so that the most correct flash intensity to be provided.So, the flash module control method of preferred embodiment of the present invention can effectively be improved conventional art because power wastage that secondary preflashing causes can't obtain the shortcoming of best main body reflectivity with a preflashing of use fixed energies.
The above only is the specific embodiment of the best of the present invention, but feature of the present invention is not limited thereto, any those skilled in the art can think easily and variation or modification, all can be encompassed within the scope of this case claim.
Claims (10)
1. a flash module control method is characterized in that, is applicable to that one has the camera head of a flash module, and this method step comprises:
According to the size of a photographed person face, extrapolate a face data; And
Control this flash module generation one and the corresponding preflashing of this face data.
2. flash module control method as claimed in claim 1 is characterized in that, also comprises: when this face data during more than or equal to one first predetermined data value, control the preflashing that this flash module produces one first intensity; When this face data during less than this first predetermined data value, carry out the determining step whether this face data is less than or equal to one second predetermined data value, wherein this first predetermined data value is greater than this second predetermined data value.
3. flash module control method as claimed in claim 2 is characterized in that, also comprises: when this face data is less than or equal to this second predetermined data value, control the preflashing that this flash module produces one second intensity; When this face data during greater than this second predetermined data value, control the preflashing that this flash module produces one the 3rd intensity, wherein the preflashing of this first intensity is less than the preflashing of the 3rd intensity, and the preflashing of the 3rd intensity is less than the preflashing of this second intensity.
4. flash module control method as claimed in claim 1 is characterized in that, also comprises: control the preflashing that this flash module produces an IGBT.
5. flash module control method as claimed in claim 1 is characterized in that, also comprises: carry out a continuously automatic focusing program at an object, to produce a focusing parameter; Judge whether this object has a personage face.
6. flash module control method as claimed in claim 5 is characterized in that, also comprises: when object has this personage's face, then carry out a face size determining program, according to face size to extrapolate this corresponding face data.
7. flash module control method as claimed in claim 6 is characterized in that, in carrying out this face size determining program, with the area ratio of a window image of face's detecting focusing frame of this personage and this camera head as basis for estimation; This window image is drawn and is divided into a plurality of image blocks, and this face size determining program has the quantity of this image block as basis for estimation with face's detecting focusing frame of this personage.
8. flash module control method as claimed in claim 5 is characterized in that, also comprises: when object does not have this personage's face, according to this focusing parameter, to extrapolate a shooting distance.
9. flash module control method as claimed in claim 8 is characterized in that, also comprises: when this shooting distance is less than or equal to one first preset distance value, control the preflashing that this flash module produces one first intensity; When this shooting distance during greater than this first preset distance value, carry out this shooting distance whether more than or equal to the determining step of one second preset distance value, wherein this first preset distance value is less than this second preset distance value.
10. flash module control method as claimed in claim 9 is characterized in that, also comprises: when this shooting distance during more than or equal to this second preset distance value, control the preflashing that this flash module produces one second intensity; When this shooting distance during less than this second preset distance value, control the preflashing that this flash module produces one the 3rd intensity, wherein the intensity of the preflashing of this first intensity is less than the preflashing of the 3rd intensity, and the intensity of the preflashing of the 3rd intensity is less than the preflashing of this second intensity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101789485A CN102036017B (en) | 2009-09-30 | 2009-09-30 | Method for controlling flashing module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101789485A CN102036017B (en) | 2009-09-30 | 2009-09-30 | Method for controlling flashing module |
Publications (2)
| Publication Number | Publication Date |
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| CN102036017A true CN102036017A (en) | 2011-04-27 |
| CN102036017B CN102036017B (en) | 2012-07-25 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101789485A Expired - Fee Related CN102036017B (en) | 2009-09-30 | 2009-09-30 | Method for controlling flashing module |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761701A (en) * | 2011-04-28 | 2012-10-31 | 毕振玲 | Novel photographing control method |
| CN103327256A (en) * | 2013-07-05 | 2013-09-25 | 上海斐讯数据通信技术有限公司 | System and method for adjusting view-finding interface display image of mobile terminal camera |
| CN104092955A (en) * | 2014-07-31 | 2014-10-08 | 北京智谷睿拓技术服务有限公司 | Flash control method and device, as well as image acquisition method and equipment |
| CN104243842A (en) * | 2014-09-29 | 2014-12-24 | 广东欧珀移动通信有限公司 | Flashlight intensity control method and image pickup device |
| CN104349072A (en) * | 2013-08-09 | 2015-02-11 | 联想(北京)有限公司 | Control method, device and electronic equipment |
| CN104601893A (en) * | 2015-01-30 | 2015-05-06 | 华为技术有限公司 | Current setting device of LED (Light Emitting Diode) flashlight, method and flash photographing device |
| CN106060417A (en) * | 2016-06-24 | 2016-10-26 | 广东欧珀移动通信有限公司 | Flashlight control method and terminal |
| CN109639991A (en) * | 2018-12-26 | 2019-04-16 | 上海与德通讯技术有限公司 | A kind of photographic method, device, terminal and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1815341A (en) * | 2005-02-06 | 2006-08-09 | 亚洲光学股份有限公司 | Method and system for automatically adjusting flash strength for camera |
| JP2008187317A (en) * | 2007-01-29 | 2008-08-14 | Fujifilm Corp | Photographing device and control method thereof, and program |
| JP4544282B2 (en) * | 2007-09-14 | 2010-09-15 | ソニー株式会社 | Data processing apparatus, data processing method, and program |
| JP5110373B2 (en) * | 2008-03-07 | 2012-12-26 | オムロン株式会社 | Measuring apparatus and method, imaging apparatus, and program |
| KR20090098197A (en) * | 2008-03-13 | 2009-09-17 | 삼성디지털이미징 주식회사 | Digital photographing apparatus to control flash lighting, controlling method for the same, and recording medium which records the program for carrying the same method |
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2009
- 2009-09-30 CN CN2009101789485A patent/CN102036017B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761701A (en) * | 2011-04-28 | 2012-10-31 | 毕振玲 | Novel photographing control method |
| CN103327256A (en) * | 2013-07-05 | 2013-09-25 | 上海斐讯数据通信技术有限公司 | System and method for adjusting view-finding interface display image of mobile terminal camera |
| CN104349072A (en) * | 2013-08-09 | 2015-02-11 | 联想(北京)有限公司 | Control method, device and electronic equipment |
| CN104092955A (en) * | 2014-07-31 | 2014-10-08 | 北京智谷睿拓技术服务有限公司 | Flash control method and device, as well as image acquisition method and equipment |
| CN104243842A (en) * | 2014-09-29 | 2014-12-24 | 广东欧珀移动通信有限公司 | Flashlight intensity control method and image pickup device |
| CN104243842B (en) * | 2014-09-29 | 2017-08-25 | 广东欧珀移动通信有限公司 | A kind of flash light intensity control method and picture pick-up device |
| CN104601893A (en) * | 2015-01-30 | 2015-05-06 | 华为技术有限公司 | Current setting device of LED (Light Emitting Diode) flashlight, method and flash photographing device |
| CN104601893B (en) * | 2015-01-30 | 2017-10-10 | 华为技术有限公司 | LED spotlight electric current sets apparatus and method, flash photographing device |
| CN106060417A (en) * | 2016-06-24 | 2016-10-26 | 广东欧珀移动通信有限公司 | Flashlight control method and terminal |
| CN106060417B (en) * | 2016-06-24 | 2019-05-17 | Oppo广东移动通信有限公司 | A kind of flash lamp control method and terminal |
| CN109639991A (en) * | 2018-12-26 | 2019-04-16 | 上海与德通讯技术有限公司 | A kind of photographic method, device, terminal and storage medium |
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