CN108540728A - Long exposure photographic method and device - Google Patents
Long exposure photographic method and device Download PDFInfo
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- CN108540728A CN108540728A CN201710129212.3A CN201710129212A CN108540728A CN 108540728 A CN108540728 A CN 108540728A CN 201710129212 A CN201710129212 A CN 201710129212A CN 108540728 A CN108540728 A CN 108540728A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
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Abstract
The present invention provides a kind of long exposure photographic method and devices, wherein this method includes：Within the long time for exposure, multiple exposure is executed, multiple frame data is obtained, all or part of available frame data in multiple frame data is adjusted, multiple frame data after adjustment are synthesized into a pictures, expose the photo taken pictures using this pictures as this vice-minister.Using above-mentioned technical proposal, multiple frame data synthesize a pictures again after being adjusted, it efficiently solves long exposure in the related technology and takes pictures and directly obtain a fuzzy photo, i.e., the problem of the picture blur shot under long exposure status so that the photo of long exposure shooting is more clear.
Description
Technical field
The present invention relates to the communications fields, in particular to a kind of long exposure photographic method and device.
Background technology
In the related art, mobile phone camera is limited by sensitivity sensor, the low light scenes effect such as generally existing night scene
The problem of difference.Improving this problem most efficient method is, increases the time for exposure, but the time for exposure is long easy to be fuzzy, must
It must be shot using tripod.
Many mobile phones have a long exposure function in the related technology, but user is difficult to be shot with hand-held, and basic
Upper user will not use tripod to mobile phone photograph.So long exposure function basic null(NUL) for users on mobile phone.
For the problem that in the related technology, the picture blur shot under long exposure status, there is presently no efficiently solve
Scheme.
Invention content
An embodiment of the present invention provides a kind of long exposure photographic method and devices, at least to solve to grow exposure in the related technology
In the case of shoot picture blur the problem of.
According to one embodiment of present invention, a kind of long exposure photographic method is provided, including：
Multiple exposure is carried out within preset first time for exposure, obtains multiple frame numbers corresponding with the multiple exposure
According to, wherein the corresponding data of exposure are as the frame data in the multiple frame data every time；Institute is adjusted according to preset rules
Multiple frame data are stated, by the corresponding picture of picture synthesis target frame of multiple frame data after adjustment, export the picture.
Optionally, multiple exposure is carried out within preset first time for exposure, including：Within preset first time for exposure
It is exposed according to the second exposure time period, wherein first time for exposure is more than second time for exposure.
Optionally, it before being exposed according to the second exposure time period within preset first time for exposure, determines
Second time for exposure is less than preset first time for exposure with value.
Optionally, the multiple frame data are adjusted according to preset rules, including：Choose the concentration in the multiple frame data
Value FV values are more than the frame data of preset value as benchmark frame data；According to the multiple frame data of reference frame data point reuse.
Optionally, according to the multiple frame data of reference frame data point reuse, including：In the benchmark frame data, institute is right
It is chosen in the picture answered and specifies subject area, the figure corresponding to the multiple frame data is adjusted according to the specified subject area
Piece.
Optionally, it is chosen in the picture corresponding to the benchmark frame data and specifies subject area, including：In the benchmark
The specified subject area is chosen around frame data focusing area in preset range.
Optionally, it is chosen in the picture corresponding to the benchmark frame data and specifies subject area, including：By the benchmark
The corresponding picture of frame data is divided into M*N pixel groups, in the color value of the color values and surrounding pixel group of the first pixel groups
In the case that difference is more than preset value, determine that first pixel groups are clear pixel groups, alternatively, in the brightness of the first pixel groups
In the case that value and the difference of the brightness value of surrounding pixel group are more than preset value, determine that first pixel groups are clear pixel
Group, wherein the M and N is natural number；In the picture in the presence of the specified area for including multiple continuous clear pixel groups
In the case of domain, determine that the specified region is the specified subject area.
Optionally, the picture corresponding to the multiple frame data is adjusted according to the specified subject area, including：Institute
It states and selects four specified subject areas around four corners of the corresponding picture of reference frame in preset range respectively, connect institute
That states four specified subject areas is centrally formed reference pattern, obtained in the multiple frame data according to the reference pattern with
The corresponding multiple figures to be compared of the reference pattern；The figure to be compared is adjusted, until the multiple frame is corresponding described
Figure to be compared is overlapped with reference pattern.
Wherein, the corresponding picture of frame data where the figure to be compared and the figure synchronizing moving to be compared.
Optionally, the figure to be compared is adjusted, including：Compare the figure to be compared and the reference pattern four
Boundary length or four corner angles, wherein at least one boundary length is poor in four edges circle or four corners
In the case that value is more than the second preset value more than the first preset value or corner angle difference, according to the reference pattern to described
Figure to be compared carries out the adjustment of shape.
Optionally, the four edges circle length of the figure to be compared and the reference pattern or four corner angles it
Afterwards, the method further includes：It is less than the first preset value or four corners in the four boundary length differences compared
In the case that angle difference is less than the second preset value, the corresponding picture of frame data where determining the figure to be compared need not be into
The adjustment of row shape.
Optionally, the figure to be compared is adjusted, including：By the specified boundary of the figure to be compared rotate to it is described
Boundary corresponding with the specified boundary is parallel in reference pattern, wherein the corresponding picture of the multiple frame data is waited for described
Compare figure synchronous rotary.
Optionally, the figure to be compared is adjusted, including：The geometric center of the mobile figure to be compared to the base
The identical position of geometric center of quasi- figure, wherein the corresponding picture of frame data waits comparing with described where the figure to be compared
Compared with figure synchronizing moving.
Optionally, it before adjusting the multiple frame data according to preset rules, adjusts every in the multiple frame data
A frame data correspond to the display effect of picture；Alternatively, the picture synthesis target frame of multiple frame data after it will adjust is corresponding
After picture, the display effect of the corresponding picture of the synthesis target frame is adjusted.
According to another embodiment of the invention, a kind of long exposure camera arrangement is provided, photographing device, packet are applied to
It includes：Acquisition module obtains corresponding with the multiple exposure more for carrying out multiple exposure within preset first time for exposure
A frame data, wherein the corresponding data of exposure are as the frame data in the multiple frame data every time；Module is adjusted, is used
In adjusting the multiple frame data according to preset rules, by the corresponding figure of picture synthesis target frame of multiple frame data after adjustment
Piece exports the picture.
Optionally, the acquisition module is additionally operable within preset first time for exposure according to the second exposure time period
It is exposed, wherein first time for exposure is more than second time for exposure.
Optionally, it before being exposed according to the second exposure time period within preset first time for exposure, determines
Second time for exposure is less than preset first time for exposure with value.
Optionally, the adjustment module is additionally operable to choose the lumped values FV values in the multiple frame data more than preset value
First frame data is as benchmark frame data；According to the multiple frame data of reference frame data point reuse.
Optionally, the adjustment module, which is additionally operable to choose in the picture corresponding to the benchmark frame data, specifies target area
Domain adjusts the specified subject area of the picture corresponding to the multiple frame data according to the specified subject area.
Through the invention, within the long time for exposure, multiple exposure is executed, multiple frame data are obtained, by multiple frame data
In all or part of available frame data be adjusted, by after adjustment multiple frame data synthesize a pictures, by this
Picture exposes the photo taken pictures as this vice-minister.Using above-mentioned technical proposal, multiple frame data synthesize one again after being adjusted
Pictures, efficiently solve long exposure in the related technology and take pictures and directly obtain a fuzzy photo, i.e., are shot under long exposure status
Picture blur the problem of so that the photo of long exposure shooting is more clear.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is a kind of hardware block diagram of the mobile terminal of long exposure photographic method of the embodiment of the present invention；
Fig. 2 is a kind of flow chart of long exposure photographic method according to the ... of the embodiment of the present invention；
Fig. 3 is the flow chart that long exposure according to the preferred embodiment of the invention is taken pictures；
Fig. 4 is according to the flow chart for choosing reference frame and datum mark in the preferred embodiment of the present invention；
Fig. 5 is to choose schematic diagram according to the datum mark of reference frame in the preferred embodiment of the present invention；
Fig. 6 is to choose schematic diagram according to the datum mark in other frame data in the preferred embodiment of the present invention；
Fig. 7 is the connection diagram one according to the datum mark of reference frame in the preferred embodiment of the present invention；
Fig. 8 is the connection diagram two according to the datum mark of reference frame in the preferred embodiment of the present invention；
Fig. 9 is the method flow for another executive mode taken pictures according to the long exposure that the preferred embodiment of the present invention is recorded
Figure；
Figure 10 is the structure diagram of long exposure camera arrangement according to the ... of the embodiment of the present invention.
Specific implementation mode
Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.
Embodiment 1
The embodiment of the method that the embodiment of the present application one is provided can execute in the devices such as camera, mobile terminal.With
For operation on mobile terminals, Fig. 1 is a kind of hardware knot of the mobile terminal of long exposure photographic method of the embodiment of the present invention
Structure block diagram.As shown in Figure 1, mobile terminal 10 may include 102 (processor of one or more (only showing one in figure) processors
102 can include but is not limited to the processing unit of Micro-processor MCV or programmable logic device FPGA etc.), for storing data
Memory 104 and transmitting device 106 for communication function.It will appreciated by the skilled person that shown in Fig. 1
Structure be only illustrate, the structure of above-mentioned electronic device is not caused to limit.For example, mobile terminal 10 may also include than figure
More either less components shown in 1 or with the configuration different from shown in Fig. 1.
Memory 104 can be used for storing the software program and module of application software, such as one kind in the embodiment of the present invention
Long to expose the corresponding program instruction/module of photographic method, processor 102 is stored in the software journey in memory 104 by operation
Sequence and module realize above-mentioned method to perform various functions application and data processing.Memory 104 may include
High speed random access memory, may also include nonvolatile memory, as one or more magnetic storage device, flash memory or its
His non-volatile solid state memory.In some instances, memory 104 can further comprise remotely setting relative to processor 102
The memory set, these remote memories can pass through network connection to mobile terminal 10.The example of above-mentioned network includes but not
It is limited to internet, intranet, LAN, mobile radio communication and combinations thereof.
Transmitting device 106 is used to receive via a network or transmission data.Above-mentioned network specific example may include
The wireless network that the communication providers of mobile terminal 10 provide.In an example, transmitting device 106 includes a Network adaptation
Device (Network Interface Controller, NIC), can be connected with other network equipments by base station so as to it is mutual
Networking is communicated.In an example, transmitting device 106 can be radio frequency (Radio Frequency, RF) module, use
In wirelessly being communicated with internet.
A kind of long exposure photographic method running on above-mentioned mobile terminal is provided in the present embodiment, and Fig. 2 is according to this
The flow chart of a kind of long exposure photographic method of inventive embodiments, as shown in Fig. 2, the flow includes the following steps：
Step S202 carries out multiple exposure within preset first time for exposure, obtains corresponding with the multiple exposure more
A frame data, wherein the corresponding data of exposure are as the frame data in multiple frame data every time；It should be noted that
The long exposure being arranged in the first time for exposure, that is, camera at this is taken pictures, and within this period, multiple exposure can also be called
Progress is repeatedly commonly taken pictures.
Step S204 adjusts multiple frame data according to preset rules, the picture of multiple frame data after adjustment is synthesized
The corresponding picture of target frame, exports the picture.You need to add is that above-mentioned steps sequence is not to the execution sequence shape of technical solution
It is limited at specific, i.e., during obtaining multiple frame data, the frame data obtained can be adjusted simultaneously, ceaselessly obtained
New frame data ceaselessly adjust new frame data, save the time of flow processing, finally, are no longer obtaining new frame data
When, all frame data may be adjusted also and be finished accordingly, then uniformly be synthesized, alternatively, having adjusted an opening and closing into one
It can be next have been adjusted, in one of synthesis newly.
Through the above steps, within the long time for exposure, multiple exposure is executed, multiple frame data are obtained, by multiple frame number
All or part of available frame data in are adjusted, and multiple frame data after adjustment are synthesized a pictures, by this
Pictures expose the photo taken pictures as this vice-minister.Using above-mentioned technical proposal, multiple frame data synthesize again after being adjusted
One pictures, efficiently solve long exposure in the related technology and take pictures and directly obtain a fuzzy photo, i.e., are clapped under long exposure status
The problem of picture blur taken the photograph so that the photo of long exposure shooting is more clear.
Optionally, it is exposed according to the second exposure time period within preset first time for exposure, wherein this
One time for exposure was more than second time for exposure.
Optionally, it before being exposed according to the second exposure time period within preset first time for exposure, determines
Second time for exposure is less than preset first time for exposure with value.
Optionally, multiple frame data are adjusted according to preset rules, including：Choose the lumped values FV in multiple frame data
Value is more than the frame data of preset value as benchmark frame data；According to the multiple frame data of reference frame data point reuse.It requires supplementation with
, the mode of selected reference frame can there are many, can select n-th can use in multiple frame data frame data as
Reference frame can preset picture relevant parameter by some, to provide that the corresponding picture of what frame data can use.Also
It can be to select frame on the basis of the photo that photograph subject position is good in multiple frame data, i.e., people or object are in an intermediate position in photo
Photo can be used as reference frame.In short, the purpose for choosing reference frame is exactly, for synthesize multiple frame data provide one it is good
Basis, good reference, selection mode be not limited to the above embodiments in content.
Optionally, it is chosen in the picture corresponding to the benchmark frame data and specifies subject area, according to the specified object being somebody's turn to do
Region adjusts the picture corresponding to multiple frame data.After selecting reference frame, for more accurate adjustment, it can choose
Specified subject area, i.e. key area in photo can be specified target area around portrait and portrait for example, clapping portrait
Domain can be more accurate as opposite lower, the so implementation of the importance of other picture locations, more prominent portrait effect
Fruit.
Optionally, near the benchmark frame data focusing area around choose corresponding to the benchmark frame data in preset range
Picture focusing area around preset range inner region be the specified object region；
Alternatively, the picture corresponding to the benchmark frame data is divided into M*N pixel groups, in the color value of the first pixel groups
In the case of being more than preset value with the difference of the color value of surrounding pixel group, determine that first pixel groups are clear pixel groups, or
Person, in the case where the difference of the brightness value of the first pixel groups and the brightness value of surrounding pixel group is more than preset value, determine this
One pixel groups are clear pixel groups, wherein the M and N is natural number；Continuously should there are multiple in the specified region of the picture
Under the specified areas case of clear pixel groups, determine that the specified region is the specified subject area.It chooses and specifies subject area
Mode is the same with the theory in multiple frame data selection reference frame, and can choosing effect of taking pictures, clearly region conduct is specified
Subject area.
Optionally, selecting four around four corners of the corresponding picture of the reference frame in preset range respectively, this is specified
Subject area, connect four specified subject areas is centrally formed reference pattern；According to the reference pattern in multiple frame number
Multiple figures to be compared corresponding with the reference pattern are obtained according to middle；
The figure to be compared is adjusted, until the corresponding figure to be compared of multiple frame overlaps wherein with reference pattern, it should
The corresponding picture of frame data where figure to be compared and the figure synchronizing moving to be compared.You need to add is that two figures are not
It may be completely superposed, may exist an error range.
Optionally, compare the four edges circle length and four corner angles of the figure to be compared and the reference pattern, wherein
At least one boundary length difference is more than the first preset value or corner angle difference in four edges circle or four corners
In the case of more than the second preset value, the adjustment of shape is carried out to the figure to be compared according to the reference pattern.In the embodiment
What is recorded is the adjustment for the shape that frame data are corresponded to picture, during graphics shape adjustment to be compared, figure institute to be compared
Picture some deformation can occur accordingly, some Picture sections can be compressed, some positions can be stretched.
Optionally, after the four edges circle length and the four corner angles that compare the figure to be compared and the reference pattern,
It is less than the first preset value in the four boundary length differences compared or four corner angle differences is less than the second preset value
In the case of, the corresponding picture of frame data need not carry out the adjustment of shape where determining the figure to be compared.
Optionally, by the specified boundary of the figure to be compared rotate to and the reference pattern in it is corresponding with the specified boundary
Boundary is parallel, wherein multiple corresponding picture of frame data and the figure synchronous rotary to be compared.Described in the present embodiment
Be, the side or angle of two figures be it is identical, still, may figure to be compared some inclinations, needed this moment by figure to be compared
Shape is rotated so that two figures can be overlapped by moving in parallel.
Optionally, the geometric center of the mobile figure to be compared extremely position identical with the geometric center of the reference pattern,
Wherein, the corresponding picture of frame data where the figure to be compared and the figure synchronizing moving to be compared.Described in the present embodiment
Technical solution is adjusted in above-mentioned deformation, simplest adjustment after rotation adjustment, mobile adjustment.Applied in two figures
It is almost the same, but some deviations of the position of figure to be compared, need the photo that will deviate to retract the position of reference pattern.It is above-mentioned
Three kinds of adjustment modes, can be used in combination, can also single use, the sequencing used also do not limit.
Optionally, it before being exposed according to the second exposure time period within preset first time for exposure, determines
Second time for exposure is less than preset first time for exposure with value.If performing multiple second exposure, the time is more than
It first time for exposure, then no longer takes pictures, no longer obtains new frame data, this vice-minister exposure is taken pictures so far.
Optionally, before adjusting multiple frame data according to preset rules, each frame in multiple frame data is adjusted
Data correspond to the display effect of picture；
Alternatively, after the corresponding picture of picture synthesis target frame of multiple frame data after adjusting, the synthesis is adjusted
The display effect of the corresponding picture of target frame.
It is described in detail below in conjunction with the preferred embodiment of the present invention.
In a preferred embodiment of the invention, the method by the way that adjustment is compared in reference object region, can be more acurrate
Picture is adjusted, keeps the picture of shooting apparent
In a preferred embodiment of the invention, following technical scheme may be used：
When the long exposure of setting is taken pictures, repeatedly it is exposed by constant exposure time；Each exposure data is as a frame data
Corresponding picture；Compare every frame of data information, chooses the wherein corresponding picture of multiframe data and be adjusted, after adjustment, by multiframe
The corresponding picture of data synthesizes a frame length exposure image.
Optionally, it when the adjustment corresponding picture of frame data, can choose during the data difference with other multiple frame data is in
Between frame as reference frame, the corresponding picture of other frame data is with reference to the benchmark framing control.Technical solution in the present embodiment is just
It is that it is necessary to meet following condition for the reference frame of selection, the adjustment that other multiple frames carry out by a small margin can be adjusted to the benchmark
The position of frame.
Optionally, when the adjustment corresponding picture of frame data, first clarity height in optional multiple frame data can conduct
The frame data of reference frame are as reference frame.
Optionally, when comparing per frame pictorial information, one or more subject areas in frame data can be chosen and made comparisons.It is optional
Ground, when choosing subject area, subject area can refer to the setting of photograph subject size；Portrait has much, to be arranged accordingly objects
Region may include portrait, alternatively, arbitrary size can be arranged in subject area.
Optionally, subject area is chosen, sharp-edged region could be provided as referring in focus area's near zone or photo
Determine subject area.
It optionally, can be by partly or wholly translating or scaling or amplify or stretch when the adjustment corresponding picture of frame data
Or squeeze etc., to complete to adjust.That is, deforming the technical solution of adjustment in subsequent embodiment.
Optionally, it when the adjustment corresponding picture of frame data, can be adjusted according to different weight point priority, the big figure of weight
Panel region, emphasis adjusts when adjustment.
Optionally, when choosing subject area and adjustment frame data, picture luminance or contrast can be increased, to facilitate selection
Subject area and adjustment frame data, need data before restoring after having adjusted.
Optionally, frame data adjustment can be carried out at the same time during long expose.
Optionally, data difference is excessive or unsharp frame data can abandon, only in multiple frame data of selection shooting
Partial frame data are as regulating object.
Optionally, when the corresponding picture of multiple frame data being synthesized a frame length exposure image, since frame data adjustment causes
Image edge loss of learning, image edge can be cropped.
Optionally, mobile phone state can be detected according to sensors such as gyroscope or acceleration, adjustment picture can refer to detection
Mobile phone mobile status.I.e. in shooting process, if camera has transverse shifting, corresponding shooting object is to get in the position of photo
It, can be with reference camera mobile status, by the corresponding picture of frame data to be adjusted subsequently when adjusting frame data come what is more kept right
It is moved to the left, with close to reference frame.
Optionally, frame data can be to synthesize long exposure image again after image procossing, it is also possible to which frame data synthesize original length
Exposure data, then carry out image procossing.
Optionally, image procossing refers to picture signal processing (Image Signal Processor, referred to as ISP) or platform
Processing.Platform processes refer to that the processors such as high pass manufacturer can carry out some display effects to the corresponding picture of the frame data of acquisition
Processing, for example, clarity, white balance etc..
Fig. 3 is the flow chart that long exposure according to the preferred embodiment of the invention is taken pictures, as shown in figure 3, the flow include with
Lower step：
Step S301 starts long exposure function；
Step S302 sets the long time for exposure；
Step S303, by typical exposure Time Exposure；
Step S304 reads frame data；
Step S305, judges whether total exposure time is more than the long time for exposure of setting；
Step S306 completes exposure data synthesis after judging that total exposure time is more than the long time for exposure of setting；
Step S307, picture effect processing
Step S308, long exposure image output.
In the step of frame data and synthesis target frame are adjusted in executing above-mentioned steps accordingly.
The corresponding flow of each step in Fig. 3 is as follows：
Step S302 sets the time for exposure
When carrying out long exposure shooting, the long time for exposure is first arranged, and (first be equivalent in above-described embodiment exposes user
Time).Since the long time for exposure is that the summations of all time for exposure (is equivalent to the second time for exposure in above-described embodiment
Summation), there is the intermittent time between exposed frame, in addition, frame synthesis and picture processing also can holding times.So shooting process can omit
More than the long time for exposure of setting.
To keep last long exposure image brightness reasonable, exposure gain values can be calculated according to the long time for exposure of setting.
In the related art, the long time for exposure is longer, and gain values are lower, and noise is smaller, and picture quality is better.Based on picture effect and use
Family experience considers that this preferred embodiment user sets long exposure time range and is set to 1/4s-4s.
Step S303 (is equivalent to the multiple exposure in above-described embodiment or the second exposure by typical exposure Time Exposure
Time), at present the mobile phone low light scene time for exposure be generally located between 1/10s-1/20s, upon exposure between in 1/10s,
It takes pictures and is easy to obscure.The exposed frame time is set as 1/20s in this preferred embodiment, reduces hand shaking to the greatest extent and causes picture blur.
Step S304 reads frame data
Multiple frame data are read, are preserved respectively, subsequently to adjust and to synthesize, judge whether total exposure time is more than setting
The long time for exposure, judgment mode, it is total exposure time that exposed frame, which is multiplied by current frame number in total, the long time for exposure with setting
Compare, if total exposure time was less than in the long time for exposure of setting, continues exposed frame；If total exposure time be more than or
Equal to the long time for exposure of setting, exposure is completed.Carry out subsequent step.
Step S307, picture effect processing
Effect process is carried out to the long exposure image of synthesis, such as ISP processing, platform processes.In addition, since framing control may
Frame data part edge can be caused to lack, so to be cut to the edge of influence.
It records and how frame data is adjusted below.
Reference frame is chosen, and chooses datum mark of the subject area of sharpness of border in one or more reference frames as adjustment
(be equivalent in above-described embodiment and specify subject area)；When adjusting other frame data, choose in other frame data with reference frame
The corresponding region of middle datum mark as adjustment reference zone, by frame data translation, stretch, scaling, deformation, the modes such as distortion,
Adjustment ginseng region is set to be aligned with datum mark.
Fig. 4 be according in the preferred embodiment of the present invention choose reference frame and datum mark flow chart, as described in Figure 4, including
Following steps：
Step S401, successively detection frame data image clarity；
Whether step S402, frame data clarity are more than given threshold；
Step S403 chooses the frame as other frame tune in the case where judgment frame clear data degree is more than given threshold
Whole reference frame；
Step S404 detects the subject area of sharpness of border in reference frame；
Step S405 chooses the subject area as adjustment basic point.
Each step in following figure 4 is described in detail.
Step S401, successively detection frame data image clarity：
Judge the available well known mode of picture clarity, checks lumped values (Focus Value, referred to as FV) value.From
One frame starts to detect, if FV values are less than the threshold value of setting, abandon the frame, continues checking for next frame；If FV values be more than or
Equal to the threshold value of setting, then using the frame as reference frame,
Step S404 detects the subject area of sharpness of border in reference frame：
Frame data are divided into m*n pixel groups, compare pixel groups color value (RGB) or brightness (Y) value, adjacent or close pixel
What group color value (RGB) or brightness (Y) value had larger difference is sharpness of border, and the big Mr. Yu of pixel groups continuous in this way sets number
Sharpness of border region is thought when amount.
Step S405 chooses the subject area as adjustment basic point
Adjustment basic point principle is chosen, edge can be used, and more clearly priority is higher.This embodiment is using 5 bases of selection
Region adjusts on schedule, chooses a center picture nearby and the region of the sharpness of border of 4 picture corner attachmentes is as datum mark
Region.Fig. 5 is to choose schematic diagram according to the datum mark of reference frame in the preferred embodiment of the present invention, as shown in figure 5, ABCDE is choosing
The 5 sharpness of border objects taken.(sharpness of border object is represented with geometric figure).
Fig. 6 is to choose schematic diagram according to the datum mark in other frame data in the preferred embodiment of the present invention, such as Fig. 6 institutes
Show, dashed rectangle region Za, Zb, Zc, Zd, Ze are respectively corresponding datum mark region.
In having chosen said reference frame and other frame data after datum mark, the concrete scheme of specific method of adjustment is such as
Under, there is deformation to adjust, rotation adjustment, mobile adjustment：
If in other frame data the datum mark region center Za, Zb, Zc, Zd, Ze correspond to respectively in reference frame datum mark be Ca,
Cb、Cc、Cd、Ce。
1. deformation adjustment
With frame image laterally for X-axis, vertically for Y-axis, lower-left fixed point is that far point O establishes coordinate system.
Calculate length in reference frame image in the image of tetra- line segments of CbCc, CcCd, CdCe, CeCb and above-mentioned
Slope K 1 in coordinate system, K2, K3, K4.Fig. 7 is the connection signal according to the datum mark of reference frame in the preferred embodiment of the present invention
Figure one, as shown in Figure 7, it is shown that K1, K2, K3, K4.
Fig. 8 is according to the connection diagram two of the datum mark of reference frame in the preferred embodiment of the present invention, as shown in figure 8, aobvious
Show that tetra- line segment angles of CbCc, CcCd, CdCe, CeCb are respectively θ 1, θ 2, θ 3, θ 4.
Four line segment angle calcu-lations in Fig. 8：
θ 1=180 °-arctgK1+arctgK4；
θ 2=arctgK1-arctgK2；
θ 3=180 °-arctgK3+arctgK2；
θ 4=arctgK3-arctgK4.
Similarly, it calculates to adjust in full frame image and corresponds to datum mark regional center Cb'Cc', Cc'Cd', Cd'Ce', CeCb'
Length in the image of four line segments and slope K 1', K2', K3', K4' in above-mentioned coordinate system.And Cb'Cc', Cc'
Cd', Cd'Ce', CeCb' tetra- line segment angle theta 1', θ 2', θ 3', θ 4'.
After obtaining above-mentioned boundary and angle, compare CbCc and Cb'Cc', CcCd and Cc'Cd' and Cd'Ce', CdCe,
CeCb and CeCb', CbCd and Cb'Cd', CcCe and Cc'Ce length differences, if length difference is both less than certain threshold value, and θ 1 and θ 1', θ
2 and θ 2' differences are both less than a certain threshold value, illustrate that adjustment frame is compared with reference frame and do not deform substantially, need not deform adjustment.
If the big Mr. Yu's threshold value of the corresponding length difference in a certain boundary or θ 1 and θ 1', 2 θ and θ 2' differ greatly Mr. Yu's threshold value, then need
Carry out deformation adjustment.Certain threshold value is preset, the first preset value being equivalent in above-described embodiment, the second preset value.
Determine needs be adjusted in the case of, detection need to adjust frame datum mark regional center Ca', Cb', Cc', Cd',
Position in positions and the above-mentioned coordinate system of reference frame datum mark regional center Ca, Cb, Cc, Cd, Ce of the Ce' in above-mentioned coordinate system
It sets；Adjustment frame (i.e. other frames) datum mark regional center and reference frame benchmark are found out in the reference frame datum mark near four angles
Point regional center deviates minimum datum mark regional center；It is assumed to Cb'.
Then, it is fixed point with Cb, Cd, Ce, Cc is adjustment point, need to adjust full frame image using deformation adjustment, keep K1 constant,
Keep CbCc and Cb'Cc' equal.
Deformation algorithm scheduling algorithm in photoshop may be used in anamorphose specific algorithm.
Then, it is fixed point with Cb, Cc, Cd, Ce is adjustment point, need to adjust full frame image using deformation adjustment, make CbCe and Cb'
Ce' is equal and θ 1 is equal with θ 1'.
Finally, it is fixed point with Cb, Cc, Ce, Cd is adjustment point, need to adjust full frame image using deformation adjustment, make CcCd and Cc'
Cd' is equal and θ 2 is equal with θ 2'.
If adjusting frame datum mark regional center and reference frame datum mark region in the reference frame datum mark near quadrangle
The datum mark regional center of center deviation minimum is Cc', Cd', Ce', also similar to the above method of adjustment.
2. rotation adjustment
Adjustment frame datum mark regional center and reference frame in reference frame datum mark in being adjusted with above-mentioned deformation near quadrangle
It is that picture rotation adjusts center that datum mark regional center, which deviates minimum datum mark regional center Cb', and rotation need to adjust the whole frame of frame
Image makes K1=K1'.
If adjusting frame datum mark regional center and reference frame datum mark region in the reference frame datum mark near quadrangle
The datum mark regional center of center deviation minimum is Cc', Cd', Ce', then corresponds to and adjusted as picture rotation using Cc' or Cd', Ce'
Center makes K2=K2' or K3=K3', K4=K4'.
3. movement adjustment
Full frame image need to be adjusted by controlling or moving up and down, and make immediate vicinity datum mark regional center Ca' and benchmark in adjustment frame
Ca' position consistencies in above-mentioned coordinate system in frame.
Finally, it records and multiple frame data is synthesized to target frame
Target frame is to store synthesising picture, and target frame is using reference frame as initial value, and the frame data being adjusted are by correspondence
Pixel data be added.
Method and step in above preferred embodiment can be applied to following scene
User selects long exposure mode to take pictures, and sets the long time for exposure, is shot, and shooting is completed and long exposure is automatically stored
Light picture.
Fig. 9 is the method flow for another executive mode taken pictures according to the long exposure that the preferred embodiment of the present invention is recorded
Figure, as shown in figure 9, the method flow in this method flow and Fig. 3 is similar, which includes the following steps：
Step S901 starts long exposure function；
Step S902 sets the long time for exposure；
Step S903, by typical exposure Time Exposure；
Step S904 reads frame data；
Step S905, judges whether total exposure time is more than the long time for exposure of setting；
Step S906 completes exposure data synthesis after judging that total exposure time is more than the long time for exposure of setting；
Step S907, long exposure image output.
Compared with the flow in Fig. 3, difference lies in：It is that frame data (picture) are first subjected to part or all of effect in Fig. 9
Processing, then by data point reuse and synthesis.Using the above scheme, compared with the flow in Fig. 3, the longer time is expended, but clear
It can be more acurrate in clear degree and sharpness of border area judging.
Using the technical solution in the preferred embodiment of the present invention, bat of the mobile phone in low light scenes such as night scenes can be greatlyd improve
According to quality, mobile phone competitiveness is promoted.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation
The method of example can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but it is very much
In the case of the former be more preferably embodiment.Based on this understanding, technical scheme of the present invention is substantially in other words to existing
The part that technology contributes can be expressed in the form of software products, which is stored in a storage
In medium (such as ROM/RAM, magnetic disc, CD), including some instructions are used so that a station terminal equipment (can be mobile phone, calculate
Machine, server or network equipment etc.) execute method described in each embodiment of the present invention.
Embodiment 2
A kind of long exposure camera arrangement is additionally provided in the present embodiment, can be applied to photographing device, which is used for
It realizes above-described embodiment and preferred embodiment, had carried out repeating no more for explanation.As used below, term " mould
The combination of the software and/or hardware of predetermined function may be implemented in block ".Although device described in following embodiment is preferably with soft
Part is realized, but the realization of the combination of hardware or software and hardware is also that may and be contemplated.
Figure 10 is the structure diagram of long exposure camera arrangement according to the ... of the embodiment of the present invention, as shown in Figure 10, the device packet
It includes：
Acquisition module 1002 obtains and the multiple exposure for carrying out multiple exposure within preset first time for exposure
The corresponding multiple frame data of light, wherein the corresponding data of exposure are as the frame data in the multiple frame data every time；
Module 1004 is adjusted, is connect with the acquisition module 1002, for adjusting the multiple frame number according to preset rules
According to by the corresponding picture of the pictures of multiple frame data after adjustment synthesis target frame, exporting the picture.
Optionally, the acquisition module 1002 was additionally operable within preset first time for exposure according to week the second time for exposure
Phase property is exposed, wherein first time for exposure is more than second time for exposure.
Optionally, the adjustment module 1004 is additionally operable to choose the lumped values FV values in the multiple frame data more than default
First frame data of value are as benchmark frame data；According to the multiple frame data of reference frame data point reuse.
Optionally, the adjustment module 1004 is additionally operable to choose specified pair in the picture corresponding to the benchmark frame data
As region, the specified target area of the picture corresponding to the multiple frame data is adjusted according to the specified subject area
Domain.
Optionally, the adjustment module 1004 is additionally operable to one of following scenario described：
It is described specified pair to choose preset range inner region around the focusing area of the picture corresponding to the benchmark frame data
As region；
Picture corresponding to the benchmark frame data is divided into M*N pixel groups, the first pixel groups color value with
In the case that the difference of the color value of surrounding pixel group is more than preset value, determine that first pixel groups are clear pixel groups, or
Person, in the case where the difference of the brightness value of the first pixel groups and the brightness value of surrounding pixel group is more than preset value, described in determination
First pixel groups are clear pixel groups,
In the specified region of the picture, there are in the case of multiple clear pixel groups, determine that the specified region is
The specified subject area.
Optionally, the adjustment module 1004 is additionally operable to make a reservation for around four corners of the corresponding picture of the reference frame
Four specified subject areas are selected in range respectively, connect four specified subject areas is centrally formed reference map
Shape, wherein the center picture of the reference frame is the center of the reference pattern；According to the reference pattern in the multiple frame
Multiple figures to be compared corresponding with the reference pattern are obtained in data；
The adjustment module 1004 is additionally operable to adjust the figure to be compared, until the figure to be compared and reference pattern
It overlaps.
Optionally, the adjustment module 1004 is additionally operable to the four edges of figure and the reference pattern to be compared described in comparison
Boundary's length and four corner angles, wherein at least one boundary length difference in four edges circle and four corners
In the case of being more than the second preset value more than the first preset value or corner angle difference, waited for described according to the reference pattern
Compare the adjustment that figure carries out shape.
Optionally, the adjustment module 1004 be additionally operable to by the specified boundary of the figure to be compared rotate to the base
Boundary corresponding with the specified boundary is parallel in quasi- figure, wherein the corresponding picture of the multiple frame data waits comparing with described
Compared with figure synchronous rotary.
Optionally, it is described adjustment module 1004 be additionally operable to move the figure to be compared geometric center to the benchmark
The identical position of geometric center of figure, wherein the corresponding picture of frame data where the figure to be compared with it is described to be compared
Figure synchronizing moving.
Optionally, the acquisition module 1002 is additionally operable to before adjusting the multiple frame data according to preset rules, is adjusted
Each frame data in whole the multiple frame data correspond to the display effect of picture；
Alternatively, the picture synthesis target frame that the adjustment module 1004 is additionally operable to multiple frame data after it will adjust corresponds to
Picture after, adjust the display effect of the corresponding picture of the synthesis target frame.
It should be noted that above-mentioned modules can be realized by software or hardware, for the latter, Ke Yitong
Following manner realization is crossed, but not limited to this：Above-mentioned module is respectively positioned in same processor；Alternatively, above-mentioned modules are with arbitrary
The form of combination is located in different processors.
Embodiment 3
The embodiments of the present invention also provide a kind of storage mediums.Optionally, in the present embodiment, above-mentioned storage medium can
To be arranged to store the program code for executing following steps：
S1 carries out multiple exposure within preset first time for exposure, obtains multiple frames corresponding with the multiple exposure
Data, wherein the corresponding data of exposure are as the frame data in the multiple frame data every time；
S2, the multiple frame data are adjusted according to preset rules, and the picture of multiple frame data after adjustment is synthesized target
The corresponding picture of frame, exports the picture.
Optionally, in the present embodiment, above-mentioned storage medium can include but is not limited to：USB flash disk, read-only memory (ROM,
Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or
The various media that can store program code such as CD.
Optionally, in the present embodiment, processor executes above-mentioned implementation according to stored program code in storage medium
Method and step in example.
Optionally, the specific example in the present embodiment can refer to described in above-described embodiment and optional embodiment
Example, details are not described herein for the present embodiment.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be with different from shown in sequence execution herein
The step of going out or describing, either they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (19)
1. a kind of long exposure photographic method, which is characterized in that including：
Multiple exposure is carried out within preset first time for exposure, obtains multiple frame data corresponding with the multiple exposure,
In, the corresponding data of exposure are as the frame data in the multiple frame data every time；
The multiple frame data are adjusted according to preset rules, the picture synthesis target frame of multiple frame data after adjustment is corresponding
Picture exports the picture.
2. according to the method described in claim 1, it is characterized in that, carry out multiple exposure within preset first time for exposure,
Including：
It is exposed according to the second exposure time period within preset first time for exposure, wherein when first exposure
Between be more than second time for exposure.
3. according to the method described in claim 2, which is characterized in that according to the second exposure within preset first time for exposure
Before time cycle property is exposed, determine second time for exposure is less than preset first time for exposure with value.
4. according to the method described in claim 1, it is characterized in that, adjust the multiple frame data according to preset rules, including：
It chooses the lumped values FV values in the multiple frame data and is more than the frame data of preset value as benchmark frame data；
According to the multiple frame data of reference frame data point reuse.
5. according to the method described in claim 4, it is characterized in that, according to the multiple frame number of reference frame data point reuse
According to, including：
It is chosen in picture corresponding to the benchmark frame data and specifies subject area, adjusted according to the specified subject area
Picture corresponding to the multiple frame data.
6. according to the method described in claim 5, referring to it is characterized in that, being chosen in picture corresponding to the benchmark frame data
Determine subject area, including：
The specified subject area is chosen in preset range around the benchmark frame data focusing area.
7. according to the method described in claim 5, referring to it is characterized in that, being chosen in picture corresponding to the benchmark frame data
Determine subject area, including：
The corresponding picture of the benchmark frame data is divided into M*N pixel groups, the first pixel groups color value and around picture
In the case that the difference of the color value of element group is more than preset value, determine that first pixel groups are clear pixel groups, alternatively, the
In the case that the difference of the brightness value of one pixel groups and the brightness value of surrounding pixel group is more than preset value, first pixel is determined
Group is clear pixel groups, wherein the M and N is natural number；
In the picture in the presence of under the specified areas cases for including multiple continuous clear pixel groups, determine described specified
Region is the specified subject area.
8. the method according to the description of claim 7 is characterized in that adjusting the multiple frame according to the specified subject area
Picture corresponding to data, including：
Four specified target areas are selected respectively in preset range around four corners of the corresponding picture of the reference frame
Domain, connect four specified subject areas is centrally formed reference pattern, according to the reference pattern in the multiple frame number
Multiple figures to be compared corresponding with the reference pattern are obtained according to middle；
The figure to be compared is adjusted, until the corresponding figure to be compared of the multiple frame is overlapped with reference pattern, wherein
The corresponding picture of frame data where the figure to be compared and the figure synchronizing moving to be compared.
9. according to the method described in claim 8, it is characterized in that, the adjustment figure to be compared, including：
Compare the four edges circle length or four corner angles of the figure to be compared and the reference pattern, wherein described
At least one boundary length difference is more than the first preset value in four edges circle or four corners or corner angle difference is big
In the case of the second preset value, the adjustment of shape is carried out to the figure to be compared according to the reference pattern.
10. according to the method described in claim 9, it is characterized in that, the figure to be compared and the reference pattern
After four edges circle length or four corner angles, the method further includes：
It is less than the first preset value or four corner angle differences in the four boundary length differences compared and is less than the
In the case of two preset values, the corresponding picture of frame data need not carry out the adjustment of shape where determining the figure to be compared.
11. according to the method described in claim 8, it is characterized in that, the adjustment figure to be compared, including：
By the specified boundary of the figure to be compared rotate to and the reference pattern in boundary corresponding with the specified boundary
It is parallel, wherein the multiple corresponding picture of frame data and the figure synchronous rotary to be compared.
12. according to the method described in claim 8, it is characterized in that, the adjustment figure to be compared, including：
The geometric center of the mobile figure to be compared extremely position identical with the geometric center of the reference pattern, wherein institute
The corresponding picture of frame data where stating figure to be compared and the figure synchronizing moving to be compared.
13. according to the method described in claim 1, it is characterized in that, according to preset rules adjust the multiple frame data it
Before, adjust the display effect that each frame data in the multiple frame data correspond to picture；
Alternatively, after the corresponding picture of picture synthesis target frame of multiple frame data after adjusting, the synthesis mesh is adjusted
Mark the display effect of the corresponding picture of frame.
14. a kind of long exposure camera arrangement, is applied to photographing device, which is characterized in that including：
Acquisition module obtains corresponding with the multiple exposure for carrying out multiple exposure within preset first time for exposure
Multiple frame data, wherein the corresponding data of exposure are as the frame data in the multiple frame data every time；
Module is adjusted, for adjusting the multiple frame data according to preset rules, the picture of multiple frame data after adjustment is closed
At the corresponding picture of target frame, the picture is exported.
15. device according to claim 14, which is characterized in that the acquisition module is additionally operable in preset first exposure
It is exposed according to the second exposure time period in time, wherein when first time for exposure is more than second exposure
Between.
16. according to the device described in claim 14, which is characterized in that exposed according to second within preset first time for exposure
Before being periodically exposed between light time, when being less than preset first exposure with value of second time for exposure is determined
Between.
17. device according to claim 14, which is characterized in that the adjustment module is additionally operable to choose the multiple frame number
Lumped values FV values in are more than first frame data of preset value as benchmark frame data；According to the reference frame data point reuse
The multiple frame data.
18. device according to claim 17, which is characterized in that the adjustment module is additionally operable in the benchmark frame data
It is chosen in corresponding picture and specifies subject area, adjusted corresponding to the multiple frame data according to the specified subject area
Picture the specified subject area.
19. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein run in described program
When control the storage medium where equipment perform claim require 1 to the method described in any one of claim 13.
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| CN201710129212.3A CN108540728A (en) | 2017-03-06 | 2017-03-06 | Long exposure photographic method and device |
| PCT/CN2017/112433 WO2018161640A1 (en) | 2017-03-06 | 2017-11-22 | Long-exposure photographing method and device |
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