CN102036017B - Method for controlling flashing module - Google Patents

Method for controlling flashing module Download PDF

Info

Publication number
CN102036017B
CN102036017B CN2009101789485A CN200910178948A CN102036017B CN 102036017 B CN102036017 B CN 102036017B CN 2009101789485 A CN2009101789485 A CN 2009101789485A CN 200910178948 A CN200910178948 A CN 200910178948A CN 102036017 B CN102036017 B CN 102036017B
Authority
CN
China
Prior art keywords
preflashing
intensity
flash module
data
less
Prior art date
Application number
CN2009101789485A
Other languages
Chinese (zh)
Other versions
CN102036017A (en
Inventor
翁启荣
萧铭松
Original Assignee
华晶科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华晶科技股份有限公司 filed Critical 华晶科技股份有限公司
Priority to CN2009101789485A priority Critical patent/CN102036017B/en
Publication of CN102036017A publication Critical patent/CN102036017A/en
Application granted granted Critical
Publication of CN102036017B publication Critical patent/CN102036017B/en

Links

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

The flash module control method

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, thus the distance of definite 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 it moves 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 B (with reference to TaiWan, China patent I265368).

So, the guide number of flash module controlled and adjusted to camera head will according to the distance B 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 present invention provides a kind of flash module control method that is applied in the camera head, and it judges photographed person's distance according to photographed person's face size; Again according to photographed person's distance; Control the flash module in this camera head, make it produce corresponding preflashing (pre-flash) intensity, to let 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 following.At first,, extrapolate a face data, then, judge that whether this face data is more than or equal to one first predetermined data value according to the size of a photographed person face; Generation one of control flash module and 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 greater than second predetermined data value, then control the preflashing that 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.

So, when the flash module control method of preferred embodiment of the present invention is applied in traditional camera head, preflashing once only need be provided, 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; Letting camera head obtain the most correct image exposure information, and then it is unlikely wrong to let the follow-up generation of flash module main dodge, 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 about other purposes of the present invention and advantage, will in follow-up explanation and accompanying drawing, set forth.

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 sketch map of the camera head of preferred embodiment of the present invention.

Description of reference numerals:

Camera head 1

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

Window image 17

Image block 172

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 that image resolution is 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 judges 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 sketch map 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 face's detecting focusing frame 19 of personage (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; Face's detecting focusing frame 19 of personage approximately occupies more than half the (that is, first predetermined data value) of image block 172 sums on the window image 17, 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; Judge photographed person's distance,, control the flash module in this camera head again according to photographed person's distance; Make it produce corresponding preflashing (pre-flash) energy; Letting camera head obtain the most correct image exposure information, and then it is unlikely wrong to let 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 be merely the best specific embodiment of the present invention, but characteristic 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 (8)

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;
Judge that whether this face data is more than or equal to one first predetermined data value; Control this flash module generation one and the corresponding preflashing of this face data;
When this face data during more than or equal to this 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; Judge whether this face data is less than or equal to one second predetermined data value, and wherein this first predetermined data value is greater than this second predetermined data value;
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.
2. 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.
3. flash module control method as claimed in claim 1 is characterized in that, also comprises: carry out a continuously automatic focusing program to an object, to produce a focusing parameter; Judge whether this object has a personage face.
4. flash module control method as claimed in claim 3 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.
5. flash module control method as claimed in claim 4 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 the quantity that this face size determining program has this image block with face's detecting focusing frame of this personage is as basis for estimation.
6. flash module control method as claimed in claim 3 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.
7. flash module control method as claimed in claim 6 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.
8. flash module control method as claimed in claim 7 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.
CN2009101789485A 2009-09-30 2009-09-30 Method for controlling flashing module CN102036017B (en)

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
CN102036017A CN102036017A (en) 2011-04-27
CN102036017B true CN102036017B (en) 2012-07-25

Family

ID=43888270

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009101789485A CN102036017B (en) 2009-09-30 2009-09-30 Method for controlling flashing module

Country Status (1)

Country Link
CN (1) CN102036017B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
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
CN104092955B (en) * 2014-07-31 2018-04-27 北京智谷睿拓技术服务有限公司 Flash control method and control device, image-pickup method and collecting 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
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
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

Citations (5)

* Cited by examiner, † Cited by third party
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
CN101237530A (en) * 2007-01-29 2008-08-06 富士胶片株式会社 Photographing apparatus, method for controlling photographing apparatus and computer-readable recording medium containing program
CN101387732A (en) * 2007-09-14 2009-03-18 索尼株式会社 Imaging apparatus, imaging apparatus control method, and computer program
CN101526719A (en) * 2008-03-07 2009-09-09 欧姆龙株式会社 Measurement device and method, imaging device, and program
CN101534396A (en) * 2008-03-13 2009-09-16 三星Techwin株式会社 Digital imaging apparatus enabled to control flash light intensity and method of controlling the digital imaging apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
CN101237530A (en) * 2007-01-29 2008-08-06 富士胶片株式会社 Photographing apparatus, method for controlling photographing apparatus and computer-readable recording medium containing program
CN101387732A (en) * 2007-09-14 2009-03-18 索尼株式会社 Imaging apparatus, imaging apparatus control method, and computer program
CN101526719A (en) * 2008-03-07 2009-09-09 欧姆龙株式会社 Measurement device and method, imaging device, and program
CN101534396A (en) * 2008-03-13 2009-09-16 三星Techwin株式会社 Digital imaging apparatus enabled to control flash light intensity and method of controlling the digital imaging apparatus

Also Published As

Publication number Publication date
CN102036017A (en) 2011-04-27

Similar Documents

Publication Publication Date Title
US9739973B2 (en) Focusing system, interchangeable lens, and image-capturing device
CN102752510B (en) Image pickup apparatus and control method thereof
JP3779247B2 (en) Imaging device
US6359650B1 (en) Electronic camera having a tilt detection function
US7953318B2 (en) Imaging apparatus and focusing method
EP1458181B1 (en) Digital camera with distance-dependent focussing method
CN1023349C (en) Exposuer controlling means for a variable focus tape camera
JP3992992B2 (en) Subject image acquisition device
KR100843818B1 (en) Still image pickup device and pickup method
US6426775B1 (en) Image pickup apparatus with distance measurement dependent on object lighting condition
CN101582987B (en) Image capture device
JPWO2013088917A1 (en) image processing apparatus, image processing method, and recording medium
US10447914B2 (en) Imaging apparatus and control method, lens apparatus and control method, using selective communication methods for improved focus adjustment
KR100930766B1 (en) Confocal method of an image pickup device and image pickup device
US6563543B1 (en) Digital camera and method of using same
KR100835441B1 (en) Exposure control method for digital camera
US20050212950A1 (en) Focal length detecting method, focusing device, image capturing method and image capturing apparatus
JP2009003003A (en) Camera provided with automatic focusing device
JP4649128B2 (en) Automatic focus adjustment apparatus and imaging apparatus having the automatic focus apparatus
US20080055753A1 (en) Lens driving control apparatus
JP4346926B2 (en) Strobe photographing system and imaging apparatus
US20050099522A1 (en) Variable length encoding method and variable length decoding method
KR20080112065A (en) Auto focus apparatus and method for camera
CN1311288C (en) Focusing device, camera and focusing position checking method
CN102694974B (en) Focus detection apparatus, method for controlling the same, and image capturing apparatus

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120725

Termination date: 20140930