CN104965376B - The adjusting method and system of a kind of terminal camera flash lamp - Google Patents

The adjusting method and system of a kind of terminal camera flash lamp Download PDF

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Publication number
CN104965376B
CN104965376B CN201510465835.9A CN201510465835A CN104965376B CN 104965376 B CN104965376 B CN 104965376B CN 201510465835 A CN201510465835 A CN 201510465835A CN 104965376 B CN104965376 B CN 104965376B
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China
Prior art keywords
camera
flash lamp
maximum current
hard
sensitivity
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Expired - Fee Related
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CN201510465835.9A
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CN104965376A (en
Inventor
刘银华
孙剑波
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00Special procedures for taking photographs; Apparatus therefor
    • G03B15/02Illuminating scene
    • G03B15/03Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05Combinations of cameras with electronic flash apparatus; Electronic flash units

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Studio Devices (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

The adjusting method and system of a kind of terminal camera flash lamp, methods described comprise the following steps:Step 1. obtains camera sensitivity S when normal flash lamp is taken pictureshigh;Step 2. is according to camera sensitivity ShighCalculate the maximum current I needed for camera when taking picturesmax;Step 3. judges maximum current ImaxWhether maximum current I that terminal camera support is more thanhard, maximum current IhardFor predetermined fixed value;If step 4. ImaxThe maximum current I supported more than terminal camerahard, then electric current is set to I=I when will take pictureshard, reacquire camera sensitivity Shigh;If ImaxThe maximum current I supported less than or equal to terminal camerahard, then next step is performed;Step 5. is by maximum current ImaxAnd camera sensitivity ShighAs electric current and camera sensitivity parameter read-in terminal camera, complete a flash lamp and take pictures.The present invention is according to the brightness case of image before and after preflashing, and the size of current of flash lamp when adjustment is taken pictures reaches the purpose of control brightness of flash lamp, so as in the case where opening flash lamp, cause the brightness of image to reach unanimously to a certain extent, and save electricity.

Description

The adjusting method and system of a kind of terminal camera flash lamp
Technical field
The present invention relates to terminal device shooting technology, the adjusting method of more particularly to a kind of terminal camera flash lamp and it is System.
Background technology
Camera, is a kind of utilization optical imaging concept formation image and the equipment for using negative writing image.Much can be with Recording image equipment all possesses the feature of camera.Medical imaging devices, astronomical observation equipment etc..Camera is to be used to photograph Optical instrument.The light that subject is reflected is by photographic film (taking the photograph scenery mirror) and controls the shutter of light exposure to focus on Afterwards, sub-image is formed on photosensitive material of the subject in camera bellows, the permanent shadow of composition is handled and (develop, be fixed) through flushing Picture, this technology is referred to as photography.It is divided into general photograph and the shooting of specialty.
And existing terminal device, generally possess camera function such as mobile phone, palm PC, such as at present, if mobile phone Flash lamp is opened when taking pictures, the brightness under any circumstance of flash lamp is all consistent, and which results in the deficiency of following aspect:
(1) under varying environment brightness, identical light source is supplemented, causes brightness of image inconsistent, same mobile phone, which is taken, to be come Effect it is different.
(2) when mobile phone is close from prospect, flash lamp beats very bright in prospect, therefore the time for exposure is very short;But it is due to Flash lamp can not provide the light source of abundance to background, and background is very dark, and the time for exposure is short, so as to be easily caused, prospect is bright, and background is dark, Cause vision light and shade contrast big, such as Fig. 1.
(3) flash lamp all reaches maximum every time, electricity waste is caused, so as to reduce the stand-by time of mobile phone.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of adjusting method of terminal camera flash lamp and System, can be such that the brightness of image reaches unanimously, effectively save electricity.
In order to achieve the above object, the technical solution adopted by the present invention is:
A kind of adjusting method of terminal camera flash lamp, comprises the following steps:
Step 1. obtains camera sensitivity S when normal flash lamp is taken pictureshigh
Step 2. is according to camera sensitivity ShighCalculate the maximum current I needed for camera when taking picturesmax
Step 3. judges maximum current ImaxWhether maximum current I that terminal camera support is more thanhard, maximum current IhardFor Predetermined fixed value;
If step 4. ImaxThe maximum current I supported more than terminal camerahard, then electric current is set to I=I when will take pictureshard, Reacquire camera sensitivity Shigh;If ImaxThe maximum current I supported less than or equal to terminal camerahard, then next step is performed;
Step 5. is by maximum current ImaxAnd camera sensitivity ShighIt is used as electric current and camera sensitivity parameter read-in terminal phase Machine, completes a flash lamp and takes pictures.
Further, step 1 is specifically included:
The picture brightness Luma values that preflashing stage picture brightness Luma values and the stage of taking pictures need to reach are set, and the picture is bright Spend the average value that Luma values are brightness of image Y;It is camera sensitivity to set image sensitive degree ISO and the product of time for exposure Sensitive, it is assumed that the camera sensitivity Sensitive before flash lamp is opened is S0, preflashing when camera sensitivity be Spre, clap According to when camera sensitivity be Shigh
S101. picture brightness Luma values L before flash lamp is opened is obtained0And camera sensitivity S0, now flash lamp, which is in, closes The electric current of state is 0;
S102. preflashing stage picture brightness Luma values L is obtainedpre, the preflashing stage current value IpreAnd camera sensitivity is Spre
S103. judge preflashing stage camera sensitivity for SpreCamera sensitivity S before being opened with flash lamp0It is whether consistent, Consistent then current picture brightness Luma values areThe pre flashing of flash lamp stage causes picture brightness Luma value changes amounts For Δ L=L'pre-L0
S104. the current value for setting the stage of taking pictures is Isnap, picture brightness Luma values be Lsnap, it is assumed that brightness of flash lamp with Electric current is directly proportional, and dodges caused picture brightness Luma value changes amounts by force by flash lamp and isDrawn when taking pictures Brightness Luma values in face are:Lhigh=Δ Lhigh+L0
S105. it is L as Luma to set brightness needed for taking picturestarget, and LtargetFor definite value, camera sensitivity when acquisition is taken pictures
Further, step 2 is specifically included:
S201. basisΔ L=L'pre-L0Lhigh=Δ Lhigh+L0AndFive formula scales are obtained
S202.Ipre、Lpre、S0、Spre、L0And LtargetFor fixed value, then I is obtainedsnapFor on ShighFunction of first order;
S203. S is obtainedhighMinimum value, be set to Smin, calculate maximum current I needed for taking picturesmax
Further, step 4 is specifically included:
If S401. ImaxThe maximum current I supported more than terminal camerahardStep S402 is then performed, if IxamIt is less than or waits The maximum current I supported in terminal camerahardThen perform step 5;
S402.ImaxThe maximum current I supported more than terminal camerahard, it is determined as flash lamp from far object distance, and ring Border brightness value is low;
S403. the electric current that will take pictures is set to I=Ihard
S404. increase camera exposure time or image sensitive degree, make ShighIncrease, recalculates camera sensitivity Shigh
The invention also discloses a kind of regulating system of terminal camera flash lamp, including:
Normal photographing camera sensitivity acquiring unit, for obtaining camera sensitivity S when normal flash lamp is taken pictureshigh
Take pictures maximum current acquiring unit, for according to camera sensitivity ShighCalculate the maximum electricity needed for camera when taking pictures Flow Imax
Judging unit, for judging maximum current ImaxWhether maximum current I that terminal camera support is more thanhard, maximum electricity Flow IhardFor predetermined fixed value;
Take pictures current setting unit, if for ImaxThe maximum current I supported more than terminal camerahard, then it is electric when will take pictures Stream is set to I=Ihard, reacquire camera sensitivity Shigh;If ImaxThe maximum current supported less than or equal to terminal camera Ihard, then next step is performed;
Memory cell, for by maximum current ImaxAnd camera sensitivity ShighWrite as electric current with camera sensitivity parameter Enter terminal camera, complete a flash lamp and take pictures.
Further, normal photographing camera sensitivity acquiring unit is specifically included:
The picture brightness Luma values that preflashing stage picture brightness Luma values and the stage of taking pictures need to reach are set, and the picture is bright Spend the average value that Luma values are brightness of image Y;It is camera sensitivity to set image sensitive degree ISO and the product of time for exposure Sensitive, it is assumed that the camera sensitivity Sensitive before flash lamp is opened is S0, preflashing when camera sensitivity be Spre, clap According to when camera sensitivity be Shigh
First acquisition unit, for obtaining picture brightness Luma values L before flash lamp is opened0And camera sensitivity S0, now dodge The electric current that light lamp is closed is 0;
Second acquisition unit, for obtaining preflashing stage picture brightness Luma values Lpre, the preflashing stage current value IpreAnd Camera sensitivity is Spre
Camera sensitivity judging unit, for judging preflashing stage camera sensitivity for SprePhase before being opened with flash lamp Machine sensitivity S0Whether consistent, unanimously then current picture brightness Luma values areThe pre flashing of flash lamp stage causes Picture brightness Luma value changes amount is Δ L=L'pre-L0
Setting unit, the current value for setting the stage of taking pictures is Isnap, picture brightness Luma values be Lsnap, it is assumed that flash of light Lamp brightness is directly proportional to electric current, dodges caused picture brightness Luma value changes amounts by force by flash lamp and is Picture brightness Luma values are when taking pictures:Lhigh=Δ Lhigh+L0
Camera sensitivity computing unit, is L as Luma for setting required brightness of taking picturestarget, and LtargetFor definite value, obtain Camera sensitivity when taking pictures
Further, maximum current acquiring unit of taking pictures is specifically included:
First computing unit, for basisΔ L=L'pre-L0Lhigh =Δ Lhigh+L0AndFive formula scales are obtained
Second computing unit, for Ipre、Lpre、S0、Spre、L0And LtargetFor fixed value, then I is obtainedsnapFor on Shigh Function of first order;
3rd computing unit, for obtaining ShighMinimum value, be set to Smin, calculate required maximum current of taking pictures Imax
Further, current setting unit of taking pictures is specifically included:
Analytic unit, if for ImaxThe maximum current I supported more than terminal camerahardNext step is then performed, if ImaxIt is small In or equal to terminal camera support maximum current IhardThen preserve data;
Identifying unit, for ImaxThe maximum current I supported more than terminal camerahard, it is determined as flash lamp from object distance Far, and ambient brightness value is low;
Setting unit, for that will take pictures, electric current is set to I=Ihard
Unit is reacquired, for increasing camera exposure time or image sensitive degree, makes ShighIncrease, recalculates camera Sensitivity Shigh
Compared with prior art, the beneficial effects of the invention are as follows:According to the brightness case of image before and after preflashing, adjustment is taken pictures When flash lamp size of current, reach control brightness of flash lamp purpose so that open flash lamp in the case of, in certain journey On degree the brightness of image is reached unanimously, and save electricity.
Brief description of the drawings
Fig. 1 is adjusting method flow chart of the invention.
Embodiment
It is described in detail referring to the drawings with reference to embodiment, so that technical characteristic and advantage to the present invention are carried out more Deep annotation.
Flow chart of the method for the present invention is as shown in figure 1, a kind of adjusting method of terminal camera flash lamp, including following step Suddenly:
The present invention step 1 be:Obtain camera sensitivity S when normal flash lamp is taken pictureshigh
As presently preferred embodiments of the present invention, step 1 of the present invention is specifically included:
The picture brightness Luma values that preflashing stage picture brightness Luma values and the stage of taking pictures need to reach are set, and the picture is bright Spend the average value that Luma values are brightness of image Y;It is camera sensitivity to set image sensitive degree ISO and the product of time for exposure Sensitive, it is assumed that the camera sensitivity Sensitive before flash lamp is opened is S0, preflashing when camera sensitivity be Spre, clap According to when camera sensitivity be Shigh
S101. picture brightness Luma values L before flash lamp is opened is obtained0And camera sensitivity S0, now flash lamp, which is in, closes The electric current of state is 0;L0And S0Value be not it is fixed, can in real time from system obtain) open flash lamp before picture brightness Luma values are obtained by obtaining picture brightness Y average values, and the sensitivity time for exposure current by obtaining and sensitivity ISO multiply Product is obtained;
S102. preflashing stage picture brightness Luma values L is obtainedpre, the preflashing stage current value IpreAnd camera sensitivity is Spre;LpreAnd SpreValue be not it is fixed, can in real time from system obtain, during preflashing picture brightness Luma values by acquisition Picture brightness Y average values are obtained, camera sensitivity SpreBy obtaining, current time for exposure and sensitivity ISO products are obtained, And the current value in preflashing stage is fixed, preset by system;
S103. judge preflashing stage camera sensitivity for SpreCamera sensitivity S before being opened with flash lamp0It is whether consistent, Consistent then current picture brightness Luma values areThe pre flashing of flash lamp stage causes picture brightness Luma value changes amounts For Δ L=L'pre-L0
S104. the current value for setting the stage of taking pictures is Isnap, picture brightness Luma values be Lsnap, (IsnapAnd LsnapValue, Picture brightness Luma values L in the two valuessnapThink to set, and IsnapIt is the value to be calculated, step S104, which is one, to be pushed away Survey process, the calculating setting of each value of reasoning) assume that brightness of flash lamp is directly proportional to electric current, dodge caused picture by force by flash lamp Brightness Luma value changes amounts arePicture brightness Luma values are when taking pictures:Lhigh=Δ Lhigh+L0
S105. it is L as Luma to set brightness needed for taking picturestarget, and LtargetFor definite value, camera sensitivity when acquisition is taken pictures
The present invention step 2 be:According to camera sensitivity ShighCalculate the maximum current I needed for camera when taking picturesmax
As presently preferred embodiments of the present invention, step 2 of the present invention is specifically included:
S201. basisΔ L=L'pre-L0Lhigh=Δ Lhigh+L0AndFive formula scales are obtained
S202.Ipre、Lpre、S0、Spre、L0And LtargetFor fixed value, then I is obtainedsnapFor on ShighFunction of first order;
S203. S is obtainedhighMinimum value, be set to Smin, calculate maximum current I needed for taking picturesmax
The present invention step 3 be:Judge maximum current ImaxWhether maximum current I that terminal camera support is more thanhard, most High current IhardFor predetermined fixed value.
The present invention step 4 be:If ImaxThe maximum current I supported more than terminal camerahard, then electric current is set when will take pictures It is set to I=Ihard, reacquire camera sensitivity Shigh;If ImaxThe maximum current I supported less than or equal to terminal camerahard, Then perform step 5.
As presently preferred embodiments of the present invention, step 4 of the present invention is specifically included:
If S401. ImaxThe maximum current I supported more than terminal camerahardStep S402 is then performed, if IxamIt is less than or waits The maximum current I supported in terminal camerahardThen perform step 5;
S402.ImaxThe maximum current I supported more than terminal camerahard, it is determined as flash lamp from far object distance, and ring Border brightness value is low;
S403. the electric current that will take pictures is set to I=Ihard
S404. increase camera exposure time or image sensitive degree, make ShighIncrease, recalculates camera sensitivity Shigh
The present invention step 4 be:By maximum current ImaxAnd camera sensitivity ShighIt is used as electric current and camera sensitivity parameter Terminal camera is write, a flash lamp is completed and takes pictures.
The flow of the specific embodiment of the present invention is as follows:
Typically, the brightness of flash lamp in preflashing stage is weaker and brightness size is fixed, i.e. the preflashing stage is supplied to flash lamp Electric current is fixed, therefore can be according to the Luma values (average value that is to say brightness of image Y) of preflashing stage picture, and is taken pictures The stage Luma values to be reached, to infer stage brightness of flash lamp value of taking pictures, namely the stage of taking pictures current value, so as to reach control The purpose of brightness of flash lamp processed.Comprise the following steps that:
Image sensitive value ISO and time for exposure T product is referred to as camera sensitivity Sensitive, it is assumed that before taking pictures Sensitive is S0, it is S during preflashingpre, it is S when taking pictureshigh.It is that normal flash lamp calculates S when taking pictures firsthighProcess.
(1) picture brightness Luma=L before taking pictures is obtained0, it is 0 that now sudden strain of a muscle, which is turned off the light as the electric current of closed mode,;
(2) then obtain the preflashing stage, picture Luma values Lpre, current value Ipre
(3) if the preflashing stage is consistent with the camera sensitivity before flash lamp unlatching, current picture brightness isPicture brightness Luma variation deltas L=L' is caused by pre flashing of flash lamppre-L0
(4) if current value when taking pictures is Isnap, picture brightness Luma values be Lsnap, it is assumed that brightness of flash lamp and electric current into Direct ratio, camera sensitivity is bright identical with taking pictures when taking pictures, then picture brightness becomes and turned to caused by being dodged by force by flash lampIt is so as to obtain picture brightness when taking pictures:Lhigh=Δ Lhigh+L0
(5) set brightness needed for taking pictures and, as Luma Target, be set to Ltarget,
(6) the calculating S above is flash lamp is taken pictureshighProcess, according to above-mentioned formula, converseExcept S on the right of formulahigh, other is all preset parameter, or is taken pictures During the definite value measured, so as to draw IsnapIt is on ShighFunction of first order;
(7) S firsthighTake minimum value Smin, calculate maximum current I needed for taking picturesmax
(8) if ImaxMore than the maximum current I of hardware supportedhard, represent under the sensitivity of Current camera, flash lamp Maximum current is not enough to take photo (far object distance, ambient brightness is low) bright enough, and electric current of now taking pictures takes I= Ihard, then recalculate Shigh, make ShighIncrease, that is, increase time for exposure or the ISO of camera;
(9) if ImaxLess than the maximum current I of hardware supportedhard, represent camera sensitivity SminUnder, to take brightness is LtargetPhoto, flash lamp only needs ImaxThe electric current of size, (distance is nearer, and ambient brightness is more spent, ImaxIt is smaller);
(10) according to the above-mentioned I calculatedmaxAnd Shigh, by electric current and camera sensitivity parameter read-in flash lamp hardware With camera model, complete a flash lamp and take pictures.
The present invention changes according to brightness of image before and after preflashing in the case where opening flash lamp, automatically selects and dodged when taking pictures The electric current of light lamp, it is not necessary to every time open electric current of flash lamp to maximum, so as to be issued to the purpose of power saving in the situation of flashing.Together When, in the case of the enough luminance pictures of hardware current, current sensitivity can be used directly and is exposed, without adjustment exposure Value, so as to save photo opporunity.
The invention also discloses a kind of regulating system of terminal camera flash lamp, including:
Normal photographing camera sensitivity acquiring unit, for obtaining camera sensitivity S when normal flash lamp is taken pictureshigh
Take pictures maximum current acquiring unit, for according to camera sensitivity ShighCalculate the maximum electricity needed for camera when taking pictures Flow Imax
Judging unit, for judging maximum current ImaxWhether maximum current I that terminal camera support is more thanhard, maximum electricity Flow IhardFor predetermined fixed value;
Take pictures current setting unit, if for ImaxThe maximum current I supported more than terminal camerahard, then it is electric when will take pictures Stream is set to I=Ihard, reacquire camera sensitivity Shigh;If ImaxThe maximum current supported less than or equal to terminal camera Ihard, then next step is performed;
Memory cell, for by maximum current ImaxAnd camera sensitivity ShighWrite as electric current with camera sensitivity parameter Enter terminal camera, complete a flash lamp and take pictures.
Further, normal photographing camera sensitivity acquiring unit is specifically included:
The picture brightness Luma values that preflashing stage picture brightness Luma values and the stage of taking pictures need to reach are set, and the picture is bright Spend the average value that Luma values are brightness of image Y;It is camera sensitivity to set image sensitive degree ISO and the product of time for exposure Sensitive, it is assumed that the camera sensitivity Sensitive before flash lamp is opened is S0, preflashing when camera sensitivity be Spre, clap According to when camera sensitivity be Shigh
First acquisition unit, for obtaining picture brightness Luma values L before flash lamp is opened0And camera sensitivity S0, now dodge The electric current that light lamp is closed is 0;
Second acquisition unit, for obtaining preflashing stage picture brightness Luma values Lpre, the preflashing stage current value IpreAnd Camera sensitivity is Spre
Camera sensitivity judging unit, for judging preflashing stage camera sensitivity for SprePhase before being opened with flash lamp Machine sensitivity S0Whether consistent, unanimously then current picture brightness Luma values areThe pre flashing of flash lamp stage causes Picture brightness Luma value changes amount is Δ L=L'pre-L0
Setting unit, the current value for setting the stage of taking pictures is Isnap, picture brightness Luma values be Lsnap, it is assumed that flash of light Lamp brightness is directly proportional to electric current, dodges caused picture brightness Luma value changes amounts by force by flash lamp and is Picture brightness Luma values are when taking pictures:Lhigh=Δ Lhigh+L0
Camera sensitivity computing unit, is L as Luma for setting required brightness of taking picturestarget, and LtargetFor definite value, obtain Camera sensitivity when taking pictures
Further, maximum current acquiring unit of taking pictures is specifically included:
First computing unit, for basisΔ L=L'pre-L0Lhigh =Δ Lhigh+L0AndFive formula scales are obtained
Second computing unit, for Ipre、Lpre、S0、Spre、L0And LtargetFor fixed value, then I is obtainedsnapFor on Shigh Function of first order;
3rd computing unit, for obtaining ShighMinimum value, be set to Smin, calculate required maximum current of taking pictures Imax
Further, current setting unit of taking pictures is specifically included:
Analytic unit, if for ImaxThe maximum current I supported more than terminal camerahardNext step is then performed, if ImaxIt is small In or equal to terminal camera support maximum current IhardThen preserve data;
Identifying unit, for ImaxThe maximum current I supported more than terminal camerahard, it is determined as flash lamp from object distance Far, and ambient brightness value is low;
Setting unit, for that will take pictures, electric current is set to I=Ihard
Unit is reacquired, for increasing camera exposure time or image sensitive degree, makes ShighIncrease, recalculates camera Sensitivity Shigh
Clear, complete description is carried out to the present invention by the technical scheme in above example, it is clear that described reality Apply embodiment of the example for a present invention part, rather than whole embodiments.Based on the embodiment in the present invention, this area is common The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected Enclose.

Claims (6)

1. a kind of adjusting method of terminal camera flash lamp, comprises the following steps:
Step 1. obtains camera sensitivity S when normal flash lamp is taken pictureshigh
Step 2. is according to camera sensitivity ShighCalculate the maximum current I needed for camera when taking picturesmax
Step 3. judges maximum current ImaxWhether maximum current I that terminal camera support is more thanhard, maximum current IhardIt is default Fixed value;
If step 4. ImaxThe maximum current I supported more than terminal camerahard, then electric current is set to I=I when will take pictureshard, again Obtain camera sensitivity Shigh;If ImaxThe maximum current I supported less than or equal to terminal camerahard, then next step is performed;
Step 5. is by maximum current ImaxAnd camera sensitivity ShighIt is complete as electric current and camera sensitivity parameter read-in terminal camera Taken pictures into a flash lamp;
Step 1 is specifically included:
The picture brightness Luma values that preflashing stage picture brightness Luma values and the stage of taking pictures need to reach, the picture brightness are set Luma values are brightness of image Y average value;It is camera sensitivity to set image sensitive degree ISO and the product of time for exposure Sensitive, it is assumed that the camera sensitivity Sensitive before flash lamp is opened is S0, preflashing when camera sensitivity be Spre, clap According to when camera sensitivity be Shigh
S101. picture brightness Luma values L before flash lamp is opened is obtained0And camera sensitivity S0, now flash lamp be closed Electric current be 0;
S102. preflashing stage picture brightness Luma values L is obtainedpre, the preflashing stage current value IpreAnd camera sensitivity is Spre
S103. judge preflashing stage camera sensitivity for SpreCamera sensitivity S before being opened with flash lamp0It is whether consistent, unanimously Then current picture brightness Luma values areThe pre flashing of flash lamp stage causes picture brightness Luma value changes amount to be Δ L=L'pre-L0
S104. the current value for setting the stage of taking pictures is Isnap, picture brightness Luma values be Lsnap, it is assumed that brightness of flash lamp and electric current It is directly proportional, dodging caused picture brightness Luma value changes amounts by force by flash lamp isPicture is bright when taking pictures Spending Luma values is:Lhigh=Δ Lhigh+L0
S105. it is L as Luma to set brightness needed for taking picturestarget, and LtargetFor definite value, camera sensitivity when acquisition is taken pictures
2. the adjusting method of terminal camera flash lamp according to claim 1, it is characterised in that step 2 is specifically included:
S201. basisΔ L=L'pre-L0Lhigh=Δ Lhigh+L0AndFive formula scales are obtained
S202.Ipre、Lpre、S0、Spre、L0And LtargetFor fixed value, then I is obtainedsnapFor on ShighFunction of first order;
S203. S is obtainedhighMinimum value, be set to Smin, calculate maximum current I needed for taking picturesmax
3. the adjusting method of terminal camera flash lamp according to claim 2, it is characterised in that step 4 is specifically included:
If S401. ImaxThe maximum current I supported more than terminal camerahardStep S402 is then performed, if IxamLess than or equal to terminal The maximum current I that camera is supportedhardThen perform step 5;
S402.ImaxThe maximum current I supported more than terminal camerahard, it is determined as flash lamp from far object distance, and ambient brightness Value is low;
S403. the electric current that will take pictures is set to I=Ihard
S404. increase camera exposure time or image sensitive degree, make ShighIncrease, recalculates camera sensitivity Shigh
4. a kind of regulating system of terminal camera flash lamp, it is characterised in that including:
Normal photographing camera sensitivity acquiring unit, for obtaining camera sensitivity S when normal flash lamp is taken pictureshigh
Take pictures maximum current acquiring unit, for according to camera sensitivity ShighCalculate the maximum current needed for camera when taking pictures Imax
Judging unit, for judging maximum current ImaxWhether maximum current I that terminal camera support is more thanhard, maximum current IhardFor predetermined fixed value;
Take pictures current setting unit, if for ImaxThe maximum current I supported more than terminal camerahard, then electric current is set when will take pictures It is set to I=Ihard, reacquire camera sensitivity Shigh;If ImaxThe maximum current I supported less than or equal to terminal camerahard, Then perform next step;
Memory cell, for by maximum current ImaxAnd camera sensitivity ShighIt is used as electric current and camera sensitivity parameter read-in terminal Camera, completes a flash lamp and takes pictures;
Normal photographing camera sensitivity acquiring unit is specifically included:
The picture brightness Luma values that preflashing stage picture brightness Luma values and the stage of taking pictures need to reach, the picture brightness are set Luma values are brightness of image Y average value;It is camera sensitivity to set image sensitive degree ISO and the product of time for exposure Sensitive, it is assumed that the camera sensitivity Sensitive before flash lamp is opened is S0, preflashing when camera sensitivity be Spre, clap According to when camera sensitivity be Shigh
First acquisition unit, for obtaining picture brightness Luma values L before flash lamp is opened0And camera sensitivity S0, now flash lamp The electric current being closed is 0;
Second acquisition unit, for obtaining preflashing stage picture brightness Luma values Lpre, the preflashing stage current value IpreAnd camera Sensitivity is Spre
Camera sensitivity judging unit, for judging preflashing stage camera sensitivity for SpreCamera sense before being opened with flash lamp Luminosity S0Whether consistent, unanimously then current picture brightness Luma values areThe pre flashing of flash lamp stage causes picture Brightness Luma value changes amount is Δ L=L'pre-L0
Setting unit, the current value for setting the stage of taking pictures is Isnap, picture brightness Luma values be Lsnap, it is assumed that flash lamp is bright Degree is directly proportional to electric current, dodges caused picture brightness Luma value changes amounts by force by flash lamp and isTake pictures When picture brightness Luma values be:Lhigh=Δ Lhigh+L0
Camera sensitivity computing unit, is L as Luma for setting required brightness of taking picturestarget, and LtargetFor definite value, acquisition is taken pictures Shi Xiangji sensitivity
5. the regulating system of terminal camera flash lamp according to claim 4, it is characterised in that maximum current of taking pictures is obtained Unit is specifically included:
First computing unit, for basisΔ L=L'pre-L0Lhigh=Δ Lhigh+L0AndFive formula scales are obtained
Second computing unit, for Ipre、Lpre、S0、Spre、L0And LtargetFor fixed value, then I is obtainedsnapFor on ShighOne Rank function;
3rd computing unit, for obtaining ShighMinimum value, be set to Smin, calculate maximum current I needed for taking picturesmax
6. the regulating system of terminal camera flash lamp according to claim 5, it is characterised in that current setting unit of taking pictures Specifically include:
Analytic unit, if for ImaxThe maximum current I supported more than terminal camerahardNext step is then performed, if ImaxIt is less than or waits The maximum current I supported in terminal camerahardThen preserve data;
Identifying unit, for ImaxThe maximum current I supported more than terminal camerahard, it is determined as flash lamp from far object distance, and Ambient brightness value is low;
Setting unit, for that will take pictures, electric current is set to I=Ihard
Unit is reacquired, for increasing camera exposure time or image sensitive degree, makes ShighIncrease, recalculates camera photosensitive Spend Shigh
CN201510465835.9A 2015-07-30 2015-07-30 The adjusting method and system of a kind of terminal camera flash lamp Expired - Fee Related CN104965376B (en)

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CN105955442A (en) * 2016-04-21 2016-09-21 青岛海信移动通信技术股份有限公司 Method and device for processing low battery of user terminal
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JP7258589B2 (en) * 2019-02-18 2023-04-17 キヤノン株式会社 Lighting device and its control method, imaging device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101820177A (en) * 2008-12-25 2010-09-01 株式会社尼康 Charger for electronic device, electronic device, and charging method
CN102081278A (en) * 2010-11-19 2011-06-01 华为终端有限公司 Flash control method and device
CN103491250A (en) * 2013-09-22 2014-01-01 惠州Tcl移动通信有限公司 Mobile terminal and flashlight module drive current setting method thereof
CN103561210A (en) * 2013-10-24 2014-02-05 惠州Tcl移动通信有限公司 Method and mobile terminal for photographing according to background light

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4603836B2 (en) * 2004-08-31 2010-12-22 キヤノン株式会社 Imaging apparatus, control method therefor, program, and recording medium
TWI454138B (en) * 2011-05-18 2014-09-21 Altek Corp Method for adjusting brightness of image

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101820177A (en) * 2008-12-25 2010-09-01 株式会社尼康 Charger for electronic device, electronic device, and charging method
CN102081278A (en) * 2010-11-19 2011-06-01 华为终端有限公司 Flash control method and device
CN103491250A (en) * 2013-09-22 2014-01-01 惠州Tcl移动通信有限公司 Mobile terminal and flashlight module drive current setting method thereof
CN103561210A (en) * 2013-10-24 2014-02-05 惠州Tcl移动通信有限公司 Method and mobile terminal for photographing according to background light

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