CN100440941C - A method of image processing and camera device - Google Patents
A method of image processing and camera device Download PDFInfo
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- CN100440941C CN100440941C CNB2006101649058A CN200610164905A CN100440941C CN 100440941 C CN100440941 C CN 100440941C CN B2006101649058 A CNB2006101649058 A CN B2006101649058A CN 200610164905 A CN200610164905 A CN 200610164905A CN 100440941 C CN100440941 C CN 100440941C
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- 230000000295 complement effect Effects 0.000 claims description 22
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- 230000008313 sensitization Effects 0.000 claims description 18
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Abstract
This invention relates to image process field and to one image process method and camera device to ensure visual flow and exposure time parameters and gains parameters, wherein, it analyzes to get one set of matched exposure time parameters and gains parameters and judges exposure time parameter efficiency; if yes, using the matched gains parameters to process the sensor gains; if not using original gains parameters for gain process.
Description
Technical field
The present invention relates to image processing field, relate in particular to a kind of image processing method and picture pick-up device.
Background technology
Present picture pick-up device usually as shown in Figure 1, comprise illuminant module, gain module and control module, wherein, illuminant module is used for sensitization and exports the image that sensitization obtains, in illuminant module, a register that is used to dispose the time for exposure parameter is arranged, by adjusting this time for exposure parameter, time for exposure in the time of can adjusting illuminant module sensitization, thus make the image brightness of illuminant module output change.For example, when light is dark, become the long time, can make the image brightness of illuminant module output proper by time for exposure parameter configuration illuminant module.After in this register, having disposed the time for exposure parameter, time for exposure parameter that should new configuration can't be the coming into force of a certain frame midway, and only can come into force in the initial of a certain frame, still, come into force to it from having disposed the time for exposure parameter, often need the delay of certain hour.The illuminant module that different manufacturers produces, this time of delay may be different, is generally the delay of 1 frame to several two field pictures.
The image that the illuminant module that gain module is used for receiving is exported carries out gain process and output.When specific implementation, gain module plays the effect of fine setting to the brightness of image, for example, when image brightness is on the low side, suitably improve the size (gain parameter of this moment should be the numerical value greater than 1) of gain parameter, image brightness can be drawn high, thereby remedy the deficiency of illuminant module output image in brightness to a certain extent.
In actual applications, time for exposure and luminance gain organically need be cooperated, the automatic exposure process is controlled,, present to the moderate image frame of people's brightness all the time with automatic adaptation varying environment intensity of illumination.Control module is used to analyze and obtains cover the time for exposure parameter and the gain parameter that are complementary, and exports to illuminant module and gain module respectively.
Present picture pick-up device because the time of delay that the time for exposure parameter comes into force in the illuminant module is uncertain, may cause exporting picture generation brightness saltus step when image is carried out brightness regulation.This is owing to suppose that it is respectively T_new and DGain_new that control module draws current required a cover time for exposure parameter and gain parameter at the N frame by computational analysis, these two parameters should organically cooperate the brightness regulation effect that just can reach best, but, because coming into force of gain parameter DGain_new do not postpone, then when the N+1 frame, configuration enters into force for the gain parameter DGain_new of gain module, gain module carries out gain controlling and output according to DGain_new to the image of importing, but, because the delay of illuminant module itself, may can not expose according to this time for exposure parameter of T_new by the N+1 frame, therefore produced in the picture pick-up device and do not matched between the current time for exposure parameter that comes into force and gain parameter, it is incorrect that direct result is exactly the image brightness handled of N+1 frame, causes output image generation brightness saltus step.
At present, for fear of output image unexpected saltus step in brightness, adopted the relatively method of conservative pressure frame losing.Particularly, exactly time for exposure parameter and the unmatched Frame of gain parameter are directly given up, for example, the delay of supposing the known time for exposure only may be 1 frame or 2 frames, can not be more, that can determine that this time for exposure parameter of T_new comes into force fully when the N+3 frame, in this case, can select relatively more conservative way, with the N+1 frame, the view data of N+2 frame is directly given up, do not present,, just continue the user is handled and presented to view data by normal flow up to this time for exposure configuration 100% sure N+3 frame that comes into force of T_new to the user.The loss of adopting the method for this frame losing can bring the video fluency.
Summary of the invention
The invention provides a kind of image processing method and picture pick-up device, be complementary in order to when guaranteeing the video fluency, to guarantee the time for exposure parameter and the gain parameter that come into force.
In order to solve the problems of the technologies described above, the invention provides a kind of picture pick-up device, comprise control module, illuminant module and gain module, described equipment comprises detection module, wherein:
Described control module is overlapped time for exposure parameter and the gain parameter that is complementary and is exported to described illuminant module and described gain module respectively by analyzing acquisition one;
Described illuminant module is according to described parameter configuration time for exposure time for exposure, and the image output that sensitization is obtained;
Described detection module detected when the described time for exposure, parameter came into force, and notified described gain module;
Described gain module utilizes the gain parameter that is complementary with described time for exposure parameter to carry out described gain process after receiving described notice; Before receiving described notice, utilize original gain parameter to carry out described gain process;
Wherein, described detection module comprises detecting unit and memory cell;
Described memory cell is preserved the monochrome information of the image that receives described illuminant module output;
The monochrome information of described detecting unit statistics current frame image, the monochrome information of current frame image and the monochrome information of the previous frame image in the described memory cell are compared, and determine that described time for exposure parameter comes into force during greater than setting threshold in both difference.
Further, the said equipment also can have following characteristics: described illuminant module is exported to described detection module with described image;
Described detection module is notified described gain module and is exported described image to it when detecting that the described time for exposure, parameter came into force, otherwise, described image is exported to described gain module.
Further, the said equipment also can have following characteristics: described gain module comprises delay cell and gain unit, wherein:
Described delay cell is waited for and is set duration, and notify described gain unit after reaching described setting duration after receiving the image of described illuminant module output at described gain module;
When described gain unit reaches the setting duration when the wait of described delay cell notice, judge whether to receive the notice of described detection module, if utilize the gain parameter that is complementary with described time for exposure parameter to carry out described gain process; Otherwise, utilize original gain parameter to carry out described gain process.
Further, the said equipment also can have following characteristics: when time for exposure parameter that described control module acquisition one cover is complementary and gain parameter, notify described detection module to begin to detect;
Described detection module stopped when the described time for exposure, parameter came into force detecting detecting.
The present invention also provides a kind of image processing method, may further comprise the steps:
Analyze and obtain time for exposure parameter and the gain parameter that a cover is complementary;
Judge whether the described time for exposure parameter that is used for the sensitization processing comes into force, promptly detect described sensitization and handle the image that obtains, when the difference of the monochrome information of the monochrome information of current frame image and its previous frame image reaches setting threshold, determine that described time for exposure parameter comes into force, utilize the gain parameter that is complementary with described time for exposure parameter that the image that obtains is handled in described sensitization and carry out gain process; Otherwise, utilize original gain parameter to carry out described gain process.
Further, said method also can have following characteristics: described monochrome information is the average brightness of appointed area in the average brightness of whole frame respective image or the respective image.
Further, said method also can have following characteristics: the concrete grammar that obtains described average brightness is: add up the average brightness of every capable pixel in the respective regions, and obtain the average brightness of respective regions according to the average brightness of described every capable pixel.
Beneficial effect of the present invention is as follows:
In the present invention, analyze time for exposure parameter and the gain parameter that acquisition one cover is complementary; Judge whether the time for exposure parameter that is used for the sensitization processing comes into force, if utilize the gain parameter that is complementary with this time for exposure parameter that the image that obtains is handled in sensitization and carry out gain process; Otherwise, utilize original gain parameter to carry out gain process.Adopt technical solution of the present invention,, therefore, can guarantee the video fluency owing to there is not pressure frame losing operation of the prior art; And, guaranteed that the time for exposure parameter and the gain parameter that come into force are complementary, thus the output image that had not only guaranteed the fluency of video but also avoided picture pick-up device unexpected saltus step in brightness.
Description of drawings
Fig. 1 is a picture pick-up device block diagram of the prior art;
Fig. 2 is the picture pick-up device block diagram in the embodiment of the invention one;
Fig. 3 is a kind of process chart of detection module in the embodiment of the invention one;
Fig. 4 is the another kind of process chart of detection module in the embodiment of the invention one;
Fig. 5 is the picture pick-up device block diagram in the embodiment of the invention two.
Embodiment
Core concept of the present invention is: for fear of output image unexpected saltus step in brightness, should guarantee the coupling between time for exposure parameter and the gain parameter, therefore, in the present invention, analyze and obtain time for exposure parameter and the gain parameter that a cover is complementary; Judge whether the time for exposure parameter that is used for the sensitization processing comes into force, if utilize the gain parameter that is complementary with this time for exposure parameter that the image that obtains is handled in sensitization and carry out gain process; Otherwise, utilize original gain parameter to carry out gain process.Thereby guarantee the coupling between time for exposure parameter and the gain parameter, avoid output image unexpected saltus step in brightness.
Below in conjunction with drawings and Examples the present invention is done description further.
Embodiment one
Whether come into force in order to detect the time for exposure of disposing for illuminant module, as shown in Figure 2, increase a detection module in the picture pick-up device in the present embodiment, then comprised illuminant module, gain module, control module and detection module in the picture pick-up device in the present embodiment, wherein:
Control module is used for drawing a current required cover time for exposure parameter and a gain parameter by computational analysis, and the time for exposure parameter is exported to illuminant module, and gain parameter is exported to gain module;
Illuminant module was used for according to parameter configuration time for exposure time for exposure that receives, and carried out sensitization according to the time for exposure of configuration and handle, and the image that sensitization obtains is exported to detection module;
Illuminant module comes into force to this time for exposure parameter from the time for exposure parameter that receives control module output, often needs the delay of certain hour.
Detection module, whether the time for exposure parameter that is used to detect the illuminant module configuration comes into force, and when detecting that the time for exposure, parameter came into force, this image is exported to gain module and notify gain module the time for exposure parameter to come into force; Otherwise, directly this image is exported to gain module;
Gain module is used for the image that receives is carried out gain process, after receiving the notice of detection module, utilizes the gain parameter that is complementary with the time for exposure parameter that comes into force to carry out gain process; Before receiving this notice, utilize original gain parameter to carry out gain process.
When specific implementation, gain module adopts the up-to-date gain parameter of control module output that the image that receives is carried out gain process after receiving the notice of detection module, otherwise, adopt original gain parameter that the image that receives is carried out gain process.
In the present embodiment, whether there is tangible brightness to change between the image of detection module by detecting illuminant module output and its previous frame image to detect the time for exposure of disposing whether to come into force for illuminant module, therefore, detection module comprises detecting unit and memory cell, the handling process of detection module may further comprise the steps as shown in Figure 3:
Step S101 is with the memory cell zero clearing;
Step S102, detecting unit judge whether first two field picture receive, if directly with this two field picture output, finish; Otherwise, carry out step S103;
Step S103, detecting unit add up in this two field picture the average brightness as monochrome information;
When the average brightness of this two field picture of statistics, can add up the average brightness of every capable pixel in this two field picture earlier, and calculate the average brightness of whole two field picture according to the average brightness of this every capable pixel.
In this step, the detecting unit statistics also can be the average brightness of appointed area in this two field picture.When the average brightness of statistics appointed area, can add up the average brightness of every capable pixel in this appointed area earlier, and calculate the average brightness of appointed area according to the average brightness of this every capable pixel.
Step S104, detecting unit obtain the difference of the average brightness preserved in the average brightness of this two field picture and the memory cell, and the average brightness of this two field picture is saved in memory cell;
Whether step S105, detecting unit judge this difference greater than setting threshold, if, carry out step S106, otherwise, carry out step S107;
As seen, in this step, the average brightness of preserving in the memory cell is the average brightness of the previous frame image of present image.
Step S106, detecting unit is exported to gain module with this two field picture, and the notice gain module adopts new gain parameter, end;
When the difference of the average brightness of preserving in the average brightness of this two field picture and the memory cell during greater than setting threshold, think that new time for exposure parameter comes into force, as seen, processing by this step, gain module is after it receives this notice, can adopt new gain parameter that frame and the subsequent frame that this new time for exposure parameter comes into force carried out gain process, realize the coupling of new time for exposure parameter and new gain parameter.
Step S107, detecting unit is exported to gain module with this two field picture.
When the difference of the average brightness of preserving in the average brightness of this two field picture and the memory cell is not more than setting threshold, think that new time for exposure parameter does not come into force, as seen, gain module is before it is notified, can continue to adopt the frame of original gain parameter before this new time for exposure parameter is come into force to carry out gain process, realize the coupling of original time for exposure parameter and original gain parameter.
In the present embodiment, detection module can also adopt handling process as shown in Figure 4, may further comprise the steps:
Step S201, the initialization memory cell;
When specific implementation, in this step, the numerical value of preserving in the memory cell is initially set point, this set point can be the empirical value of the average brightness of illuminant module output image.
Step S202, the average brightness of the two field picture that the detecting unit statistics receives;
Step S203, detecting unit obtain the difference of the average brightness preserved in the average brightness of this two field picture and the memory cell, and the average brightness of this two field picture is saved in memory cell;
Whether step S204, detecting unit judge this difference greater than setting threshold, if, carry out step S205, otherwise, carry out step S206;
Step S205, detecting unit is saved in memory cell with the average brightness of this two field picture, and this two field picture is exported to gain module, and the notice gain module adopts new gain parameter, end;
Step S206, detecting unit is saved in memory cell with the average brightness of this two field picture, and this two field picture is exported to gain module.
When the specific implementation of present embodiment, control module can be when analysis draws a cover time for exposure parameter and gain parameter, the notice detection module, detection module can be after receiving the notice of control module, whether the time for exposure parameter that just begins to detect to the illuminant module configuration comes into force, and after detecting the time for exposure parameter and coming into force and notify gain module, stop to detect.Detection module is under the situation whether the time for exposure parameter that does not detect to illuminant module configuration comes into force, the processing of being done is only for exporting to gain module with the image of illuminant module output, as seen, so processing can reduce the processing of detection module, reduces the load of picture pick-up device.
Embodiment two
In embodiment one, by detection module to the gain module output image.And since the required processing time of detection module can be very short, therefore, in the present embodiment, can be as shown in Figure 5, directly to the gain module output image, and make gain module postpone the gain process of image is waited for the notice of detection module by illuminant module.
In the present embodiment, control module is used for drawing a current required cover time for exposure parameter and a gain parameter by computational analysis, and the time for exposure parameter is exported to illuminant module, and gain parameter is exported to gain module;
Illuminant module is according to parameter configuration time for exposure time for exposure, and the image that sensitization obtains is exported to detection module and gain module respectively;
Detection module is when parameter comes into force to the time for exposure according to the image detection that receives, the notice gain module;
Gain module is waited for setting-up time behind the image that receives illuminant module output, if receive the notice of detection module in setting-up time, then utilize the gain parameter that is complementary with the time for exposure parameter that comes into force to carry out gain process; Otherwise utilize original gain parameter to carry out gain process.
Gain module can comprise delay cell and gain unit, wherein:
Delay cell is waited for and is set duration, and notify gain unit after reaching this setting duration after receiving the image of illuminant module output at gain module;
When gain unit reaches the setting duration when the wait of delay cell notice, judge whether to receive the notice of detection module, if the gain parameter that the time for exposure parameter that utilization comes into force is complementary is carried out gain process; Otherwise, utilize original gain parameter to carry out gain process.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1, a kind of picture pick-up device comprises control module, illuminant module and gain module, it is characterized in that, described equipment comprises detection module, wherein:
Described control module is overlapped time for exposure parameter and the gain parameter that is complementary and is exported to described illuminant module and described gain module respectively by analyzing acquisition one;
Described illuminant module is according to described parameter configuration time for exposure time for exposure, and the image output that sensitization is obtained;
Described detection module detected when the described time for exposure, parameter came into force, and notified described gain module;
Described gain module utilizes the gain parameter that is complementary with described time for exposure parameter to carry out gain process after receiving described notice; Before receiving described notice, utilize original gain parameter to carry out described gain process;
Wherein, described detection module comprises detecting unit and memory cell;
Described memory cell is preserved the monochrome information of the image that receives described illuminant module output;
The monochrome information of described detecting unit statistics current frame image, the monochrome information of current frame image and the monochrome information of the previous frame image in the described memory cell are compared, and determine that described time for exposure parameter comes into force during greater than setting threshold in both difference.
2, equipment as claimed in claim 1 is characterized in that, described illuminant module is exported to described detection module with described image;
Described detection module is notified described gain module and is exported described image to it when detecting that the described time for exposure, parameter came into force, otherwise, described image is exported to described gain module.
3, equipment as claimed in claim 1 is characterized in that, described gain module comprises delay cell and gain unit, wherein:
Described delay cell is waited for and is set duration, and notify described gain unit after reaching described setting duration after receiving the image of described illuminant module output at described gain module;
When described gain unit reaches the setting duration when the wait of described delay cell notice, judge whether to receive the notice of described detection module, if utilize the gain parameter that is complementary with described time for exposure parameter to carry out described gain process; Otherwise, utilize original gain parameter to carry out described gain process.
4, equipment as claimed in claim 1 is characterized in that, when time for exposure parameter that described control module acquisition one cover is complementary and gain parameter, notifies described detection module to begin to detect;
Described detection module stopped when the described time for exposure, parameter came into force detecting detecting.
5, a kind of image processing method is characterized in that, may further comprise the steps:
Analyze and obtain time for exposure parameter and the gain parameter that a cover is complementary;
Judge whether the described time for exposure parameter that is used for the sensitization processing comes into force, promptly detect described sensitization and handle the image that obtains, when the difference of the monochrome information of the monochrome information of current frame image and its previous frame image reaches setting threshold, determine that described time for exposure parameter comes into force, utilize the gain parameter that is complementary with described time for exposure parameter that the image that obtains is handled in described sensitization and carry out gain process; Otherwise, utilize original gain parameter to carry out described gain process.
6, method as claimed in claim 5 is characterized in that, described monochrome information is the average brightness of appointed area in the average brightness of whole frame respective image or the respective image.
7, method as claimed in claim 6, it is characterized in that, the concrete grammar that obtains described average brightness is: add up the average brightness of every capable pixel in the respective regions, and obtain the average brightness of respective regions according to the average brightness of described every capable pixel.
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| CNB2006101649058A CN100440941C (en) | 2006-12-07 | 2006-12-07 | A method of image processing and camera device |
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| CNB2006101649058A CN100440941C (en) | 2006-12-07 | 2006-12-07 | A method of image processing and camera device |
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| CN100440941C true CN100440941C (en) | 2008-12-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108961169A (en) * | 2017-05-22 | 2018-12-07 | 杭州海康威视数字技术股份有限公司 | Monitor grasp shoot method and device |
| JP6717333B2 (en) * | 2018-03-23 | 2020-07-01 | 株式会社デンソー | Exposure control device |
| CN108419025B (en) * | 2018-05-30 | 2020-01-07 | 北京图森未来科技有限公司 | Exposure parameter adjusting method and device and readable medium |
| CN109474790B (en) * | 2018-11-05 | 2021-06-15 | 浙江大华技术股份有限公司 | Exposure adjusting method, exposure adjusting device, camera and computer storage medium |
| CN110708473B (en) * | 2019-11-14 | 2022-04-15 | 深圳市道通智能航空技术股份有限公司 | High dynamic range image exposure control method, aerial camera and unmanned aerial vehicle |
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| JPH06261248A (en) * | 1993-03-03 | 1994-09-16 | Toshiba Corp | Video camera |
| US20030184661A1 (en) * | 2002-03-27 | 2003-10-02 | Kouichi Yubata | Light exposure control method, light exposure control circuit, image pickup apparatus, program and storage medium |
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| CN1547070A (en) * | 2003-12-09 | 2004-11-17 | Automatic exposure method under dynamic frame rate condition | |
| CN1547072A (en) * | 2003-11-28 | 2004-11-17 | Method for eliminating exposure flicker under lighting lamp | |
| CN1609694A (en) * | 2003-10-20 | 2005-04-27 | 精工爱普生株式会社 | Exposure control device and exposure control method |
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| JPH06261248A (en) * | 1993-03-03 | 1994-09-16 | Toshiba Corp | Video camera |
| US20030184661A1 (en) * | 2002-03-27 | 2003-10-02 | Kouichi Yubata | Light exposure control method, light exposure control circuit, image pickup apparatus, program and storage medium |
| CN1609694A (en) * | 2003-10-20 | 2005-04-27 | 精工爱普生株式会社 | Exposure control device and exposure control method |
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