CN102348055A - Method for dynamically modifying picture frame parameters - Google Patents
Method for dynamically modifying picture frame parameters Download PDFInfo
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- CN102348055A CN102348055A CN2010102430434A CN201010243043A CN102348055A CN 102348055 A CN102348055 A CN 102348055A CN 2010102430434 A CN2010102430434 A CN 2010102430434A CN 201010243043 A CN201010243043 A CN 201010243043A CN 102348055 A CN102348055 A CN 102348055A
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Abstract
The invention relates to a method for dynamically modifying picture frame parameters. In the method, whether an input picture frame is special scenery or ordinary scenery is determined; when the input picture frame belongs to special scenery, the parameters of the next picture frame can be modified according to the special scenery operation so as to obtain a predicted picture frame; when the input picture framework does not belong to special scenery, the parameters of the next picture frame can be modified according to the ordinary scenery operation so as to obtain a predicted picture frame; and then whether the predicted picture frame is special scenery is determined. According to the invention, if both the input picture frame and the predicted picture frame belong to special scenery, the parameters of the input picture frame can be modified according to the special scenery operation; if both the input picture frame and the predicted picture frame do not belong to the special scenery, the parameters of the input picture frame can be modified according to the ordinary scenery operation; and if either the input picture frame or the predicted picture frame belongs to the special scenery, the parameters of the input picture frame is maintained to be unchanged.
Description
Technical field
The present invention relates to a kind of imaging (imaging) device, particularly relate to a kind of method that is applicable to the dynamic change picture frame parameter of digital camera or video camera.
Background technology
Automatic exposure (auto-exposure, AE) and AWB (auto white balance AWB) becomes the indispensable function of digital camera or video camera gradually.For example, under backlight mode (backlight mode), when subject was in environment backlight, the AE function promptly can increase the brightness of image automatically.After increasing brightness, subject possibly no longer satisfied situation backlight by detecting.At this moment, the AE function promptly can reduce or reply the brightness of image.The increase of above-mentioned brightness and minimizing may constantly circulate, thereby cause image secretly to neglect bright flicker (hunting) phenomenon suddenly.In another example, under the dusk pattern, when subject satisfies dusk during mode condition, the AWB function promptly can change the colourity of image automatically.The increase of colourity and minimizing may constantly circulate, and also cause the scintillation of image.
The scintillation of the curve chart display backlight pattern of Fig. 1.When general situation (picture frame 1), the AE function is located at 100% with brightness.At this moment, detect condition backlight, therefore the AE function is located at 105% with the brightness of next picture frame (picture frame 2).Therefore increase to after 105% in brightness, find that image no longer satisfies condition backlight this moment, and the AE function is made as original 100% with the brightness of next picture frame (picture frame 3).When brightness returns back to (general) 100%, detect situation backlight once more.Brightness is constantly circulation increase and minimizing therefore, thereby the flicker that produces image, causes the discomfort of user or onlooker's eyes.
In view of conventional method causes scintillation easily, therefore need the method that proposes a kind of novelty badly, in order to prevent the generation of scintillation.
This shows that above-mentioned existing automatic exposure imaging device obviously still has inconvenience and defective, and demands urgently further improving in structure, method and use.In order to solve the problem of above-mentioned existence; Relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly; But do not see always that for a long time suitable design is developed completion, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of method of novel dynamic change picture frame parameter, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing automatic exposure imaging device exists; The inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge; And cooperate the utilization of scientific principle, actively study innovation, in the hope of founding a kind of method of novel dynamic change picture frame parameter; Can improve general existing automatic exposure imaging device, make it have more practicality.Through constantly research, design, and, found out the present invention of true tool practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
Main purpose of the present invention is, overcomes the defective that existing automatic exposure imaging device exists, and a kind of method of novel dynamic change picture frame parameter is provided, and technical problem to be solved is to make it avoid scintillation effectively, is very suitable for practicality.
The object of the invention and solve its technical problem and adopt following technical scheme to realize.The method of a kind of dynamic change picture frame parameter that proposes according to the present invention, it comprises:
Determine whether an input picture frame is the special scenery corresponding to a scenery pattern, perhaps is non-general scenery corresponding to this scenery pattern;
Predict next picture frame, when this input picture frame belongs to this special scenery, then according to the operation of special scenery with the parameter that changes this next picture frame to obtain this prediction picture frame; When this input picture frame is non-when belonging to this special scenery, then according to general scenery operation with the parameter that changes this next picture frame to obtain this prediction picture frame; And
Determine whether this prediction picture frame is the special scenery corresponding to this scenery pattern;
Wherein when if this input picture frame and this prediction picture frame all belong to this special scenery, then this special scenery of basis is operated to change the parameter of this input picture frame;
Wherein if this input picture frame and this prediction picture frame are all non-when belonging to this special scenery, then this general scenery of basis is operated to change the parameter of this input picture frame; And
Wherein if this input picture frame or when only this prediction picture frame belongs to this special scenery is only then kept the parameter constant of this input picture frame.
The object of the invention and solve its technical problem and also can adopt following technical measures further to realize.
The method of aforesaid dynamic change picture frame parameter, wherein said parameter are brightness.
The method of aforesaid dynamic change picture frame parameter, wherein said special scenery operation comprises adjustment one preset brightness value, and this general scenery operation comprises reverse adjustment one preset brightness value.
The method of aforesaid dynamic change picture frame parameter, the adjustment of wherein said brightness is carried out by automatic exposure (AE) unit.
The method of aforesaid dynamic change picture frame parameter, wherein said scenery pattern is a backlight mode, under this backlight mode, subject receives backlight illumination.
The method of aforesaid dynamic change picture frame parameter, wherein said special scenery operation comprises increases by a preset brightness value, and this general scenery operation comprises minimizing one preset brightness value.
The method of aforesaid dynamic change picture frame parameter, wherein said parameter are colourity.
The method of aforesaid dynamic change picture frame parameter, wherein said special scenery operation comprises the chromatic value of an adjustment part, and this general scenery operation comprises the chromatic value of a reverse adjustment part.
The method of aforesaid dynamic change picture frame parameter, the adjustment of wherein said colourity is carried out by AWB (AWB) unit.
The method of aforesaid dynamic change picture frame parameter, wherein said input picture frame and this next picture frame are the two adjacent picture frames of a digital camera under preview mode, and by this, this input picture frame can not produce scintillation.
The method of aforesaid dynamic change picture frame parameter, wherein said input picture frame and this next picture frame are the two adjacent picture frames that a video camera is recorded, and by this, this input picture frame can not produce scintillation.
The present invention compared with prior art has tangible advantage and beneficial effect.Know by above,, the invention provides a kind of method of dynamic change picture frame parameter for achieving the above object.According to the embodiment of the invention, whether decision input picture frame is the special scenery corresponding to the scenery pattern, perhaps is non-general scenery corresponding to the scenery pattern.Predict next picture frame, when input picture frame when belonging to special scenery, then according to special scenery operation with the parameter that changes next picture frame to obtain predicting picture frame; Picture frame is non-when belonging to special scenery when input, then according to general scenery operation with the parameter that changes next picture frame to obtain predicting picture frame.Whether decision prediction picture frame is the special scenery corresponding to the scenery pattern.By this, if when input picture frame and prediction picture frame all belong to special scenery, then according to the parameter of special scenery operation with change input picture frame; If input picture frame and prediction picture frame are all non-when belonging to special scenery, then according to the parameter of general scenery operation with change input picture frame; And, then keep the parameter constant of input picture frame if only import picture frame or only predict when picture frame belongs to special scenery.
By technique scheme, the method that the present invention dynamically changes the picture frame parameter has advantage and beneficial effect at least: the present invention avoids scintillation effectively, is very suitable for practicality.
In sum, the invention relates to a kind of method of dynamic change picture frame parameter, decision input picture frame is special scenery or is general scenery.When input picture frame when belonging to special scenery, then according to special scenery operation with the parameter that changes next picture frame to obtain predicting picture frame; Picture frame is non-when belonging to special scenery when input, then according to general scenery operation with the parameter that changes next picture frame to obtain predicting picture frame.Whether decision prediction picture frame is special scenery.By this, if when input picture frame and prediction picture frame all belong to special scenery, then according to the parameter of special scenery operation with change input picture frame; If input picture frame and prediction picture frame are all non-when belonging to special scenery, then according to the parameter of general scenery operation with change input picture frame; And, then keep the parameter constant of input picture frame if only import picture frame or only predict when picture frame belongs to special scenery.The present invention has obvious improvement technically, and has tangible good effect, really is the new design of a novelty, progress, practicality.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention; Understand technological means of the present invention in order can more to know; And can implement according to the content of specification, and for let of the present invention above-mentioned with other purposes, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.
Description of drawings
The scintillation of the curve chart display backlight pattern of Fig. 1.
The flow chart of Fig. 2 shows the method for the dynamic change picture frame parameter of the embodiment of the invention.
21-28: step
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; To its embodiment of method, structure, characteristic and the effect thereof of the dynamic change picture frame parameter that proposes according to the present invention, specify as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can clearly appear in the following detailed description that cooperates with reference to graphic preferred embodiment.Explanation for ease, in following embodiment, components identical is represented with identical numbering.
The flow chart of Fig. 2 shows the method for the dynamic change picture frame parameter of the embodiment of the invention.Present embodiment is applicable to the mobile phone or the video camera of digital camera, tool digital camera.But the above-mentioned image of picture frame index word camera under preview mode, the perhaps image recorded of video camera.
In step 21, whether decision input picture frame is the special scenery (special scene) corresponding to a scenery pattern (scene mode), perhaps is non-general scenery corresponding to this scenery pattern (general scene).In one embodiment, the scenery pattern is a backlight mode, and under this pattern, subject receives backlight illumination.When the standard of input picture frame corresponding (or satisfying) backlight mode or when requiring, in other words, when subject receives backlight illumination, then import picture frame and promptly be decided to be special scenery.Otherwise the input picture frame promptly is decided to be general scenery.
If the input picture frame is decided to be special scenery, then then in step 22, according to the parameter (for example, brightness) of special scenery operation, in order to predict next picture frame to change next picture frame.Wherein, above-mentioned special scenery operation can be carried out by automatic exposure (AE) unit, for example adjusts or increases by one and preset brightness value.
On the other hand, if the input picture frame is decided to be general scenery, then then in step 23, according to the parameter (for example, brightness) of general scenery operation, in order to predict next picture frame to change next picture frame.Wherein, above-mentioned general scenery operation can be carried out by the AE unit, for example oppositely adjusts or reduces by a preset brightness value.Next, in step 24, whether the prediction picture frame that deciding step 22 is produced is the special scenery corresponding to backlight mode, perhaps is non-general scenery corresponding to backlight mode.The decision of prediction picture frame is similar to the decision of aforementioned input picture frame.
On the other hand, in step 25, whether the prediction picture frame that deciding step 23 is produced is the special scenery corresponding to backlight mode, perhaps is non-general scenery corresponding to backlight mode.
If input picture frame and prediction picture frame all belong to special scenery, then in step 26, according to the parameter (for example, brightness) of special scenery operation with change input picture frame.If input picture frame and prediction picture frame are all non-to be special scenery, then in step 27, according to the parameter (for example, brightness) of general scenery operation with change input picture frame.If only import picture frame or only predict that picture frame belongs to special scenery (that is being in boundary case), then in step 28, the parameter (for example, brightness) of keeping the input picture frame is constant.
According to the foregoing description, only when the input picture frame is all special scenery or is all general scenery with the prediction picture frame, just can change the parameter of input picture frame.Therefore, be able to avoid the incidental scintillation of traditional imaging device.Though the foregoing description with backlight mode as illustration, yet the present invention is also applicable to other pattern.For example, dusk, pattern can be used for before or after the sun sets, with the yellow image of positively biased more.
For pattern at dusk (nightfall mode), in step 21, whether decision input picture frame is the special scenery corresponding to the pattern at dusk, perhaps is non-general scenery corresponding to the pattern at dusk.When the standard of input picture frame corresponding (or satisfying) pattern at dusk or when requiring, then import picture frame and promptly be decided to be special scenery.Otherwise the input picture frame promptly is decided to be general scenery.
If the input picture frame is decided to be special scenery, then then in step 22, according to the parameter (for example, colourity) of special scenery operation, in order to predict next picture frame to change next picture frame.Wherein, above-mentioned special scenery operation can be carried out by AWB (AWB) unit, for example the chromatic value of an adjustment or an increase part.
On the other hand, if the input picture frame is decided to be general scenery, then then in step 23, according to the parameter (for example, colourity) of general scenery operation, in order to predict next picture frame to change next picture frame.Wherein, above-mentioned general scenery operation can be carried out by the AWB unit, the chromatic value of a for example reverse adjustment or a minimizing part.Next, in step 24, whether the prediction picture frame that deciding step 22 is produced is the special scenery corresponding to the pattern at dusk, perhaps is non-general scenery corresponding to the pattern at dusk.The decision of prediction picture frame is similar to the decision of aforementioned input picture frame.
On the other hand, in step 25, whether the prediction picture frame that deciding step 23 is produced is the special scenery corresponding to the pattern at dusk, perhaps is non-general scenery corresponding to the pattern at dusk.
If input picture frame and prediction picture frame all belong to special scenery, then in step 26, according to the parameter (for example, colourity) of special scenery operation with change input picture frame.If input picture frame and prediction picture frame are all non-to be special scenery, then in step 27, according to the parameter (for example, colourity) of general scenery operation with change input picture frame.If only import picture frame or only predict that picture frame belongs to special scenery (that is being in boundary case), then in step 28, the parameter (for example, colourity) of keeping the input picture frame is constant.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be the content that does not break away from technical scheme of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (11)
1. dynamic method of change picture frame parameter is characterized in that comprising:
Determine whether an input picture frame is the special scenery corresponding to a scenery pattern, perhaps is non-general scenery corresponding to this scenery pattern;
Predict next picture frame, when this input picture frame belongs to this special scenery, then according to the operation of special scenery with the parameter that changes this next picture frame to obtain this prediction picture frame; When this input picture frame is non-when belonging to this special scenery, then according to general scenery operation with the parameter that changes this next picture frame to obtain this prediction picture frame; And
Determine whether this prediction picture frame is the special scenery corresponding to this scenery pattern;
Wherein when if this input picture frame and this prediction picture frame all belong to this special scenery, then this special scenery of basis is operated to change the parameter of this input picture frame;
Wherein if this input picture frame and this prediction picture frame are all non-when belonging to this special scenery, then this general scenery of basis is operated to change the parameter of this input picture frame; And
Wherein if this input picture frame or when only this prediction picture frame belongs to this special scenery is only then kept the parameter constant of this input picture frame.
2. the method for dynamic change picture frame parameter according to claim 1 is characterized in that wherein said parameter is brightness.
3. the method for dynamic change picture frame parameter according to claim 1 it is characterized in that wherein said special scenery operation comprises adjustment one preset brightness value, and this general scenery operation comprises reverse adjustment one preset brightness value.
4. the method for dynamic change picture frame parameter according to claim 3 is characterized in that the adjustment of wherein said brightness is carried out by the automatic exposure unit.
5. the method for dynamic change picture frame parameter according to claim 2 is characterized in that wherein said scenery pattern is a backlight mode, and under this backlight mode, subject receives backlight illumination.
6. the method for dynamic change picture frame parameter according to claim 5 it is characterized in that wherein said special scenery operation comprises increase by one preset brightness value, and this general scenery operation comprises minimizing one preset brightness value.
7. the method for dynamic change picture frame parameter according to claim 1 is characterized in that wherein said parameter is a colourity.
8. the method for dynamic change picture frame parameter according to claim 7 it is characterized in that wherein said special scenery operation comprises the chromatic value of an adjustment part, and this general scenery operation comprises the chromatic value of a reverse adjustment part.
9. the method for dynamic change picture frame parameter according to claim 8 is characterized in that the adjustment of wherein said colourity is carried out by the AWB unit.
10. the method for dynamic change picture frame parameter according to claim 1 is characterized in that wherein said input picture frame and this next picture frame are the two adjacent picture frames of a digital camera under preview mode, and by this, this input picture frame can not produce scintillation.
11. the method for dynamic change picture frame parameter according to claim 1 is characterized in that wherein said input picture frame and this next picture frame are the two adjacent picture frames that a video camera is recorded, by this, this input picture frame can not produce scintillation.
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| US20090304275A1 (en) * | 2008-06-04 | 2009-12-10 | Vijay Kumar Kodavalla | Method and apparatus for dynamic and adaptive enhancement of colors in digital video images |
| CN101677366A (en) * | 2008-09-19 | 2010-03-24 | 华晶科技股份有限公司 | Image brightness correction method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070025720A1 (en) * | 2005-07-28 | 2007-02-01 | Ramesh Raskar | Method for estimating camera settings adaptively |
| JP2007329522A (en) * | 2006-06-06 | 2007-12-20 | Mitsubishi Heavy Ind Ltd | White balance adjustment apparatus for color identification device |
| JP2009212810A (en) * | 2008-03-04 | 2009-09-17 | Mitsubishi Electric Corp | Vehicle imaging apparatus |
| US20090304275A1 (en) * | 2008-06-04 | 2009-12-10 | Vijay Kumar Kodavalla | Method and apparatus for dynamic and adaptive enhancement of colors in digital video images |
| CN101677366A (en) * | 2008-09-19 | 2010-03-24 | 华晶科技股份有限公司 | Image brightness correction method |
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