CN2694317Y - Automatic exposure control circuit for avoiding exposure twinkle under lighting lamp - Google Patents
Automatic exposure control circuit for avoiding exposure twinkle under lighting lamp Download PDFInfo
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- CN2694317Y CN2694317Y CN 200320124678 CN200320124678U CN2694317Y CN 2694317 Y CN2694317 Y CN 2694317Y CN 200320124678 CN200320124678 CN 200320124678 CN 200320124678 U CN200320124678 U CN 200320124678U CN 2694317 Y CN2694317 Y CN 2694317Y
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- 230000008030 elimination Effects 0.000 claims 3
- 238000003379 elimination reaction Methods 0.000 claims 3
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 230000001276 controlling effect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 abstract 1
- 230000007363 regulatory process Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model discloses an automatic exposure control circuit for avoiding exposure twinkle under lighting lamp, belonging to the exposure regulating field under lighting lamp. The automatic exposure control circuit can eliminate the jump in brightness in the exposure regulating process, and solve the problems that the luminance gain and the exposure time take effect simultaneously. The brightness gain control circuit of the utility model also comprises a simultaneous control unit with preset luminance gain efficient delay frame number, and the regulation model control unit transmits the controlling instruction to the simultaneous control unit. The exposure time controlling circuit also comprises an efficient marking counting unit, and the efficient marking counting unit counts the exposure frame number of the exposure time efficient unit and sends the frame number to the simultaneous control unit. The simultaneous control unit compares the exposure frame number sent by the efficient marking counting unit with the preset luminance gain efficient delay frame number, and if the exposure frame number reaches to the delay frame number, the simultaneous control unit transmits the efficient control instruction for brightness to the luminance gain efficient unit.
Description
Technical field
The utility model relates to the field that exposure is regulated under the daylight lamp, relates in particular to the automatic exposure control circuit of eliminating explosure flash under the illuminating lamp.
Background technology
The interior automatic exposure control circuit of existing camera head generally comprises and receives luminance gain luminance gain control circuit that upgrades and the exposure time control circuit that receives the time shutter renewal.Wherein, described exposure time control circuit comprises the time shutter unit that comes into force, and the unit that comes into force of described time shutter is used for sending controling instruction and gives described external sensor; Comprise described luminance gain control circuit adjusting pattern control module and the luminance gain unit that comes into force, described adjusting pattern control module are used for sending controling instruction and give the described luminance gain unit that comes into force.
Usually under fluorescent light, existing automatic exposure control circuit is in order to eliminate the flicker striped that sensor photosensitive produces, must allow the exposure of sensor be 1/100 second integral multiple during PAL (Phase Alternating Line) standard, must allow the exposure of sensor be 1/120 second integral multiple during NTSC (National Television System Committee) standard.Smoother in order to allow exposure regulate simultaneously, when AE (Auto Expose, automatic exposure) regulates, between two time shutter shelves,, make AE regulate and seem smoother with the method for regulating luminance gain.When regulating the time shutter, when the time shutter changed, luminance gain also was returned to the basic point yield value of adjusting.So just produced a problem, after the time shutter was changed, sensor can't allow the time shutter after changing just come into force at once at present frame, just can come into force but will delay several frames, and the luminance gain value can come into force at once.The problem that brightness has a sudden change flicker in the process that AE regulates, occurs with regard to having caused like this, make AE regulate and seem unsmooth.
The utility model content
In order to solve prior art problems and deficiency, the purpose of this utility model is to provide a kind of automatic exposure control circuit of eliminating explosure flash under the illuminating lamp.It can eliminate the jump in brightness in the exposure mediation process, has solved the problem that luminance gain and time shutter come into force simultaneously.
In order to realize the foregoing invention purpose, the technical solution of the utility model realizes as follows:
A kind of automatic exposure control circuit of eliminating explosure flash under the illuminating lamp comprises the luminance gain control circuit that receives luminance gain and upgrade, the exposure time control circuit that receives the time shutter renewal.Described exposure time control circuit comprises the time shutter unit that comes into force, and the unit sending controling instruction that comes into force of described time shutter is given described external sensor.The described luminance gain of giving comprise described luminance gain control circuit adjusting pattern control module and the luminance gain unit that comes into force, the described adjusting pattern control module sending controling instruction unit that comes into force.Its design feature is, described luminance gain control circuit comprises that also setting in advance luminance gain comes into force and postpone the synchronous control unit of frame number, and described adjusting pattern control module sending controling instruction is given described synchronous control unit.Described exposure time control circuit also comprises the Blip Counting unit that comes into force, the described Blip Counting unit that comes into force is to the come into force exposure frames counting number of unit and the frame number that counts to get sent to described synchronous control unit of time shutter, described synchronous control unit is compared according to come into force Blip Counting unit exposure frame number that sends and the luminance gain that the presets delay frame number that comes into force, if reach the delay frame number, described synchronous control unit sends steering order that brightness comes into force to the described luminance gain unit that comes into force.
The luminance gain that above-mentioned synchronous control unit sets in advance comes into force and postpones frame number and can regulate.The luminance gain that sets in advance comes into force, and to postpone frame number be 1.
The frame number that obtains exposure image is counted by the frame start information to exposure image in the above-mentioned Blip Counting unit that comes into force.
After regulating the time shutter, sensor can't allow the time shutter come into force at once at present frame, just comes into force but delay several frames.The Blip Counting unit that comes into force of the present utility model is counted the number of image frames of exposure, and send the frame number count to get to synchronous control unit by the Blip Counting unit that comes into force, synchronous control unit comes into force frame number that obtains and the luminance gain that sets in advance and postpones frame number and compare, and comes into force and makes luminance gain come into force when postponing frame number when the number of image frames of exposure reaches luminance gain.Like this, just solved the problem that time shutter and luminance gain come into force simultaneously, eliminated the jump in brightness flicker in the AE mediation process, made AE regulate and become level and smooth.
Description of drawings
Fig. 1 is construction module figure of the present utility model;
Fig. 2 is for realizing method flow diagram of the present utility model.
At the drawings and specific embodiments the utility model is elaborated below.
Embodiment
Referring to Fig. 1, the utility model comprises the luminance gain control circuit 1 that receives luminance gain and upgrade, the exposure time control circuit 2 that receives the time shutter renewal.Described exposure time control circuit 2 comprises come into force Blip Counting unit 6 and the time shutter unit 7 that comes into force.The described time shutter is come into force the unit sending controling instruction to the described external sensor 8 and the Blip Counting unit 6 that comes into force.The described Blip Counting unit 6 pairs of time shutter of coming into force come into force the unit the exposure frames counting number and send to described luminance gain refresh circuit 1.Comprise described luminance gain control circuit 1 adjusting pattern control module 3, synchronous control unit 4 and the luminance gain unit 5 that comes into force.The luminance gain that set in advance described synchronous control unit 4 comes into force and postpones frame number (being set to 1 usually), and this luminance gain comes into force and postpones frame number and can regulate.Give described adjusting pattern control module 3 sending controling instructions described synchronous control unit 4 and the luminance gain unit 5 that comes into force.Described synchronous control unit 4 is compared according to Blip Counting unit 6 exposure frame number that sends and the luminance gains that preset that the come into force delay frame number that comes into force.If reach the delay frame number, described synchronous control unit 4 sends steering order that brightness come into force to the described luminance gain unit 5 that comes into force.
Referring to Fig. 2, the workflow of this device is: 1) the luminance gain value is set; 2) be set the time shutter; 3) judge whether to be provided with luminance gain, if be not provided with, then return AE circulation next time, if be provided with, then execution in step 4); 4) zone bit that comes into force of exposure image is counted, obtained the frame number of exposure image; 5) number of image frames that obtains and the luminance gain that has set in advance are come into force postpone frame number and compare, if reach the delay frame number, then execution in step 6), if do not reach the delay frame number, then return step 4); 6) luminance gain comes into force; 7) carry out AE circulation next time.
If illuminating lamp is the light source of 50Hz alternating current under driving, above-mentioned steps 2) in time shutter be 0.01 second integral multiple; If illuminating lamp is under the light source of 60Hz alternating current under driving, above-mentioned steps 2) time shutter in is 1/120 second a integral multiple.
When carrying out the AE adjusting, calculate the average brightness value of whole two field picture earlier, judging whether needs conciliation brightness and time shutter.Carry out the adjustment of brightness and time shutter by three kinds of modes then, first kind of mode is under the stable situation of time shutter, only need adjust luminance gain; The second way is only to need to adjust the time shutter, and the explosure flash of generation is very slight; The third mode is to adjust simultaneously luminance gain and time shutter, and it is smoother to make that by the method for reconciling luminance gain AE regulates.The utility model is exactly the improvement at the third mode, comes into force simultaneously by regulating luminance gain and time shutter, and it is more level and smooth to make that AE regulates.
Claims (4)
1. automatic exposure control circuit of eliminating explosure flash under the illuminating lamp, comprise the luminance gain control circuit (1) that receives luminance gain and upgrade, the exposure time control circuit (2) that receives the time shutter renewal, described exposure time control circuit (2) comprises the time shutter unit (7) that comes into force, and unit (7) sending controling instruction that comes into force of described time shutter is given described external sensor (8); The described luminance gain of giving comprise described luminance gain control circuit (1) adjusting pattern control module (3) and the luminance gain unit (5) that comes into force, described adjusting pattern control module (3) the sending controling instruction unit (5) that comes into force; It is characterized in that, described luminance gain control circuit (1) comprises that also setting in advance luminance gain comes into force and postpone the synchronous control unit (4) of frame number, described adjusting pattern control module (3) sending controling instruction is given described synchronous control unit (4), described exposure time control circuit (2) also comprises the Blip Counting unit (6) that comes into force, the described Blip Counting unit (6) that comes into force is to the come into force exposure frames counting number of unit (7) and the frame number that counts to get sent to described synchronous control unit (4) of time shutter, described synchronous control unit (4) is compared according to the Blip Counting unit (6) that comes into force exposure frame number that sends and the luminance gain that the presets delay frame number that comes into force, if reach the delay frame number, described synchronous control unit (4) sends steering order that brightness comes into force to the described luminance gain unit (5) that comes into force.
2. according to the automatic exposure control circuit of explosure flash under the described elimination illuminating lamp of claim 1, it is characterized in that the luminance gain that described synchronous control unit (4) sets in advance comes into force and postpones frame number and can regulate.
3. according to the automatic exposure control circuit of explosure flash under the described elimination illuminating lamp of claim 1, it is characterized in that the described luminance gain that sets in advance comes into force, and to postpone frame number be 1.
4. according to the automatic exposure control circuit of explosure flash under the described elimination illuminating lamp of claim 1, it is characterized in that the frame number that obtains exposure image is counted by the frame start information to exposure image in the described Blip Counting unit (6) that comes into force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320124678 CN2694317Y (en) | 2003-11-28 | 2003-11-28 | Automatic exposure control circuit for avoiding exposure twinkle under lighting lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320124678 CN2694317Y (en) | 2003-11-28 | 2003-11-28 | Automatic exposure control circuit for avoiding exposure twinkle under lighting lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2694317Y true CN2694317Y (en) | 2005-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320124678 Expired - Lifetime CN2694317Y (en) | 2003-11-28 | 2003-11-28 | Automatic exposure control circuit for avoiding exposure twinkle under lighting lamp |
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| CN (1) | CN2694317Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370354C (en) * | 2003-11-28 | 2008-02-20 | 北京中星微电子有限公司 | Automatic focusing control circuit for eliminating exposure flicker under lighting lamp |
| CN103945092A (en) * | 2014-05-04 | 2014-07-23 | 深圳市同为数码科技股份有限公司 | Method for preventing orange stripes from generating in process of imaging |
| CN110557576A (en) * | 2019-09-27 | 2019-12-10 | 高新兴科技集团股份有限公司 | Stroboscopic lamp synchronous control method based on video |
| CN111937373A (en) * | 2018-03-23 | 2020-11-13 | 株式会社电装 | Exposure control device and exposure control method |
| CN112200755A (en) * | 2020-12-09 | 2021-01-08 | 成都索贝数码科技股份有限公司 | Image defogging method |
-
2003
- 2003-11-28 CN CN 200320124678 patent/CN2694317Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370354C (en) * | 2003-11-28 | 2008-02-20 | 北京中星微电子有限公司 | Automatic focusing control circuit for eliminating exposure flicker under lighting lamp |
| CN103945092A (en) * | 2014-05-04 | 2014-07-23 | 深圳市同为数码科技股份有限公司 | Method for preventing orange stripes from generating in process of imaging |
| CN111937373A (en) * | 2018-03-23 | 2020-11-13 | 株式会社电装 | Exposure control device and exposure control method |
| CN111937373B (en) * | 2018-03-23 | 2022-04-08 | 株式会社电装 | Exposure control device and exposure control method |
| CN110557576A (en) * | 2019-09-27 | 2019-12-10 | 高新兴科技集团股份有限公司 | Stroboscopic lamp synchronous control method based on video |
| CN112200755A (en) * | 2020-12-09 | 2021-01-08 | 成都索贝数码科技股份有限公司 | Image defogging method |
| CN112200755B (en) * | 2020-12-09 | 2021-05-07 | 成都索贝数码科技股份有限公司 | Image defogging method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080220 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |