CN100369467C - Correction method for flash frequency - Google Patents
Correction method for flash frequency Download PDFInfo
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- CN100369467C CN100369467C CNB2005100347817A CN200510034781A CN100369467C CN 100369467 C CN100369467 C CN 100369467C CN B2005100347817 A CNB2005100347817 A CN B2005100347817A CN 200510034781 A CN200510034781 A CN 200510034781A CN 100369467 C CN100369467 C CN 100369467C
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- bearing calibration
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- flicker frequency
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Abstract
The present invention relates to a correction method for flash frequency, which is suitable for adjusting the frequency setting of a shooting device. Firstly, the same picture is shot constantly for many times; subsequently, two same shot pictures are divided into a plurality of cut pictures, and one of the cut pictures has one cross stripe which occurs instant luminance variation. Brightness analysis is implemented to judge whether brightness values of two same cut pictures are same or not, and the frequency setting of the shooting device is varied until the brightness is not varied. Therefore. when the shooting device shoots a display or a television, the mode of brightness analysis can be used for detecting whether cut pictures occur cross stripes or not, and the optimized shooting effect is achieved by varying the frequency setting.
Description
Technical field
The invention relates to a kind of bearing calibration of flicker frequency, and particularly relevant for avoiding shooting picture to produce the bearing calibration of a kind of flicker frequency of ripples line.
Bei Jing Ji Intraoperative
Hand-hold electronic device is meant little, the portable electronic installation of volume, for example mobile phone (mobile phone), digital camera (Digital Camera) reach individualized digital aid (PDA) (PDA) or the like, and manufacturer more combines the function of digital camera with the function of phone, PDA in recent years, and the product that becomes multiduty digital camera or have the mobile phone, PDA and so on of shoot function.Though more diversification of the application of product no matter be which kind of digital product, all has the restriction of himself product to exist, so that at some special occasions or use, can't produce best shooting effect.
For example, human eye can identification flicker frequency be about 75Hz, if the display frequency of TV or display (or scanning frequency) is when being lower than 75Hz, human eye will be felt film flicker; If the display frequency of TV or display is higher than 75Hz, human eye just can not felt film flicker.Similarly, the camera lens of digital camera or digital camera and the function of sensitive chip are as eyes, when the light source (as fluorescent lamp) of taking flicker or when taking the display that changes picture fast or TV, if during the scanning frequency and be lower than the flicker frequency of digital camera or video camera institute energy identification of the flicker frequency of fluorescent lamp or TV, on shooting picture, the situation of flicker can occur, and produce the picture of similar water ripple.This is because difference or inconsistent the causing that video camera vertically scans frequency and waits to take the flicker frequency of thing so that horizontal white band line or black horizontal stripe appear in shooting picture, influences whole shooting effect.
Summary of the invention
Purpose of the present invention is exactly that a kind of bearing calibration of flicker frequency is being provided, and can avoid shooting picture to produce horizontal stripe, and then reaches best shooting effect.
The present invention proposes a kind of bearing calibration of flicker frequency, is suitable for adjusting the frequency setting of a filming apparatus, and the bearing calibration of this flicker frequency comprises the following steps: at first, takes same picture repeatedly with filming apparatus.Then, two identical shooting picture are divided into most cutting pictures.Carry out brightness analysis, whether identical with the brightness value of judging two identical cutting pictures, and the frequency setting of change filming apparatus, till brightness no longer changes.
Described according to preferred embodiment of the present invention, above-mentioned filming apparatus for example is digital camera or digital camera, and it changes it by frequency adjustment interface and scans frequency.
Described according to preferred embodiment of the present invention, in the above-mentioned cutting picture, at least one cutting picture has the horizontal stripe that moment brightness changes, and horizontal stripe is produced by the scanning linear that rule on the screen moves.
Described according to preferred embodiment of the present invention, above-mentioned shooting picture is divided into the steps of most cutting pictures, comprises this shooting picture is divided on one picture and picture once.
Described according to preferred embodiment of the present invention, above-mentioned brightness analysis comprises whether the average brightness value of judging two identical cutting pictures is identical.
The present invention detects the cutting picture because of the mode that adopts brightness analysis and horizontal stripe whether occurs, and adjusts the frequency setting of filming apparatus by this, till brightness no longer changes.Therefore, the horizontal stripe of moment brightness variation will can not appear in shooting picture after overcorrect again, and then improve whole effect of taking.
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
For above-mentioned and other purpose, feature and advantage of the present utility model can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Fig. 1 illustrates the flow chart of bearing calibration of a kind of flicker frequency of a preferred embodiment of the present invention.
Fig. 2 illustrates the schematic diagram of the step of corresponding diagram 1.
Embodiment
Fig. 1 illustrates the flow chart of bearing calibration of a kind of flicker frequency of a preferred embodiment of the present invention, and Fig. 2 illustrates the schematic diagram of the step of corresponding diagram 1, it is suitable for adjusting the frequency setting of a filming apparatus, occurs the problem of horizontal stripe during with the light source that solves known shooting flicker or video screen.Filming apparatus with digital camera, digital camera and so on is an example in the present embodiment, but mobile phone, PDA or other multimedia device with shoot function also can be suitable in equivalence.
Please also refer to the step 1 S110 of Fig. 1 and Fig. 2, when taking thing, fix angle and orientation that camera lens is found a view earlier, with the same picture of establishing shot more than 10 time with the alignment lens one of filming apparatus.It should be noted that when the shooting thing is fixed display that frequently scans or TV the shooting picture 10 of camera or video camera can be shot the horizontal stripe 12,14 that rule moves because of the frequency setting difference, and the position of the horizontal stripe 12,14 of front and back shooting is also inequality.Owing to when horizontal stripe occurs, can present white strip region or black strip region that moment brightness changes, therefore change by the brightness of judging two identical shooting picture 10, can learn horizontal stripe 12,14 whether occurs.
From the above, in step 2 S120～step 5 S150, repeat the action of shooting when camera or video camera, and when capturing at least two identical shooting picture 10, carry out the brightness of image resolution and/or color, the correction program of saturation (as step 2 S120) earlier, then identical shooting picture 10 is divided into most cutting pictures, for example step 3 S130 is described, shooting picture 10 is divided on one picture 10a and picture 10b once, then carries out the judgement of step 4 S140 and step 5 S150 more respectively.
In the present invention, do not limit identical shooting picture 10 is divided into upper and lower picture 10a, 10b, also may be partitioned into the cutting picture of smaller szie, and the speed that changes with brightness is foundation.
In step 4 S140, can learn by judging two brightness variations (for example variation of average brightness value) of going up picture 10a whether picture 10a horizontal stripe 12 occurs, if then carry out step 6 S160, with the frequency setting that changes filming apparatus till brightness no longer changes.Therefore, when last picture 10a no longer horizontal stripe 12 occurs, then carry out step S150.
Then, in step 5 S150, change (for example variation of average brightness value) by the brightness of judging two following picture 10b and can learn down whether picture 10b horizontal stripe 14 occurs, if then carry out step 6 S160, with the frequency setting of change filming apparatus till brightness no longer changes.Therefore, when picture 10b no longer horizontal stripe 14 occurs instantly, then carry out step S170, the correction of expression frequency setting is finished, and the horizontal stripe that moment brightness changes can not appear in the shooting picture 20 after therefore proofreading and correct.
In the present embodiment, for making things convenient for the user to adjust frequency in real time, provide an application software with specific implementation in the filming apparatus, it can be adjusted interface by a frequency and come automatic or manual to select desired frequency (for example to set three groups or organize adjustable frequency more, for you to choose), make it level off to the flicker frequency (for example about 60Hz) of display or TV, to avoid occurring on the shooting picture strip region of similar water ripple.Certainly, the present invention is also applicable on the light source (as fluorescent lamp) of taking flicker, does not repeat them here.
In sum, the invention provides a kind of bearing calibration of flicker frequency, be suitable for adjusting the frequency setting of a filming apparatus.At first, the same picture of establishing shot repeatedly.Then, two identical shooting picture are divided into a plurality of cutting pictures, and the cutting picture that the horizontal stripe that moment brightness changes occurs is carried out brightness analysis, whether identical with the brightness value of judging two identical cutting pictures, and the frequency setting of change filming apparatus, till brightness no longer changes.Therefore, the present invention detects the cutting picture by the mode of brightness analysis and horizontal stripe whether occurs, and reach optimized shooting effect by the setting that changes frequency when taking display or TV, both convenient and processing ease is so can be used on any electronic product with shoot function.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this patient, without departing from the spirit and scope of the invention; when can doing a little change and retouching, so the present invention's protection range attached claims person of defining after looking is as the criterion.
Claims (7)
1. the bearing calibration of a flicker frequency is suitable for adjusting the frequency setting of a filming apparatus, it is characterized in that the bearing calibration of this flicker frequency comprises:
With the same picture of this filming apparatus establishing shot repeatedly;
Two identical shooting picture are divided into most cutting pictures; And
Carry out brightness analysis, whether identical with the brightness value of judging two identical cutting pictures, and change the frequency setting of this filming apparatus, till brightness no longer changes.
2. the bearing calibration of flicker frequency according to claim 1 is characterized in that: this filming apparatus is digital camera or digital camera, and it adjusts the setting that interface changes its frequency by a frequency.
3. the bearing calibration of flicker frequency according to claim 1 is characterized in that: in those cutting pictures, at least one cutting picture has the horizontal stripe that moment brightness changes, and this horizontal stripe is produced by the scanning linear that rule on the screen moves.
4. the bearing calibration of flicker frequency according to claim 1 is characterized in that: this shooting picture is divided into the steps of most cutting pictures, comprises this shooting picture is divided on one picture and picture once.
5. the bearing calibration of flicker frequency according to claim 1 is characterized in that: the step of brightness analysis comprises whether the average brightness value of judging two identical cutting pictures is identical.
6. the bearing calibration of flicker frequency according to claim 1 is characterized in that: take after the picture, also comprise the correction program of the image resolution that carries out this picture.
7. the bearing calibration of flicker frequency according to claim 1 is characterized in that: take after the picture, also comprise the brightness of the color that carries out this picture, the correction program of saturation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100347817A CN100369467C (en) | 2005-05-27 | 2005-05-27 | Correction method for flash frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100347817A CN100369467C (en) | 2005-05-27 | 2005-05-27 | Correction method for flash frequency |
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| Publication Number | Publication Date |
|---|---|
| CN1870727A CN1870727A (en) | 2006-11-29 |
| CN100369467C true CN100369467C (en) | 2008-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100347817A Expired - Fee Related CN100369467C (en) | 2005-05-27 | 2005-05-27 | Correction method for flash frequency |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI549506B (en) * | 2013-05-21 | 2016-09-11 | 原相科技股份有限公司 | Optical detecting device and related method of adjusting synchronization |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937480A (en) * | 2012-11-21 | 2013-02-20 | 广东欧珀移动通信有限公司 | Method, device and mobile terminal for detecting ambient light frequency |
| CN107181919B (en) * | 2013-05-24 | 2019-10-29 | 原相科技股份有限公司 | Optical detection apparatus |
| CN104184954B (en) * | 2013-05-27 | 2017-11-03 | 原相科技股份有限公司 | Optical detection apparatus and its synchronization adjustment method |
| JP6863381B2 (en) * | 2016-08-16 | 2021-04-21 | ソニーグループ株式会社 | Imaging control device, imaging control method and imaging system |
| CN107197158A (en) * | 2017-06-29 | 2017-09-22 | 深圳鼎智通讯股份有限公司 | A kind of camera shoots display filter damascene method |
| CN107395980A (en) * | 2017-08-17 | 2017-11-24 | 深圳市金立通信设备有限公司 | A kind of photographic method, terminal and computer-readable recording medium |
| CN107509040A (en) * | 2017-09-15 | 2017-12-22 | 维沃移动通信有限公司 | A kind of photographic method and mobile terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001119708A (en) * | 1999-10-19 | 2001-04-27 | Matsushita Electric Ind Co Ltd | Flicker detection and correction device, and flicker detection and correction method |
| US20030112343A1 (en) * | 2001-12-18 | 2003-06-19 | Katsumi Katoh | Image-pickup signal processor and method of detecting flicker |
| CN1437389A (en) * | 2001-12-27 | 2003-08-20 | 夏普公司 | Scintillation correction apparatus, scintillation correction method and recording medium for storing scintillation correction program |
| CN1609694A (en) * | 2003-10-20 | 2005-04-27 | 精工爱普生株式会社 | Exposure control device and exposure control method |
-
2005
- 2005-05-27 CN CNB2005100347817A patent/CN100369467C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001119708A (en) * | 1999-10-19 | 2001-04-27 | Matsushita Electric Ind Co Ltd | Flicker detection and correction device, and flicker detection and correction method |
| US20030112343A1 (en) * | 2001-12-18 | 2003-06-19 | Katsumi Katoh | Image-pickup signal processor and method of detecting flicker |
| CN1437389A (en) * | 2001-12-27 | 2003-08-20 | 夏普公司 | Scintillation correction apparatus, scintillation correction method and recording medium for storing scintillation correction program |
| CN1609694A (en) * | 2003-10-20 | 2005-04-27 | 精工爱普生株式会社 | Exposure control device and exposure control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI549506B (en) * | 2013-05-21 | 2016-09-11 | 原相科技股份有限公司 | Optical detecting device and related method of adjusting synchronization |
| US9459140B2 (en) | 2013-05-21 | 2016-10-04 | Pixart Imaging Inc. | Optical detecting device and related method of adjusting synchronization |
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| Publication number | Publication date |
|---|---|
| CN1870727A (en) | 2006-11-29 |
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