CN109165539A - Barcode scanning light compensation method and device - Google Patents
Barcode scanning light compensation method and device Download PDFInfo
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- CN109165539A CN109165539A CN201810924541.1A CN201810924541A CN109165539A CN 109165539 A CN109165539 A CN 109165539A CN 201810924541 A CN201810924541 A CN 201810924541A CN 109165539 A CN109165539 A CN 109165539A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1417—2D bar codes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/146—Methods for optical code recognition the method including quality enhancement steps
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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
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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Abstract
The present invention relates to a kind of barcode scanning light compensation method and device, method one includes: to obtain barcode scanning instruction, opens camera barcode scanning function, carries out barcode scanning to image, and the image that barcode scanning is obtained is stored in caching；The described image of caching is identified；If identification is unsuccessful, light levels analysis is carried out to described image, whether the light levels that discriminatory analysis goes out are lower than predetermined threshold；If the light levels are lower than the predetermined threshold, open flashlight function and carry out light filling.Method two includes: to open sensitization function when getting photosensitive instruction, incude the light intensity of ambient enviroment；Judge whether the light intensity is lower than light intensity threshold value；If the light intensity is lower than the light intensity threshold value, opens flashlight function and carry out light filling, and open camera barcode scanning function.Light levels can be imaged in the present invention according to barcode scanning or ambient light intensity automatically opens flashlight and carries out light filling, more convenient using operating.
Description
Technical field
The present invention relates to barcode scanning identification technology field, in particular to a kind of barcode scanning light compensation method and device.
Background technique
When usually riding Mo Bai, little Huang vehicle, there are also other many scenes, require to sweep two dimensional code.But at night
When, surrounding light is especially dark, and sweeping two dimensional code at this time, we must open the flashlight carried on mobile phone or by it manually
His light source operates more troublesome.
Reflective shinny situation in figure, this excessively bright situation are frequently encountered in addition, opening and carrying flashlight on mobile phone
Also can not succeed barcode scanning.If but the light of flashlight is suitably dimmed, this problem can solve.
Summary of the invention
In order to solve the above technical problems, the main object of the present invention is to provide a kind of barcode scanning light compensation method and device, passes through
Light levels can be imaged in this method and device according to barcode scanning or ambient light intensity automatically opens flashlight and carries out light filling, use
It operates more convenient.
A kind of barcode scanning light compensation method, comprising:
It obtains barcode scanning to instruct, opens camera barcode scanning function, barcode scanning is carried out to image, and the image that barcode scanning is obtained is stored in and delays
It deposits；
The described image of caching is identified；
If identification is unsuccessful, light levels analysis is carried out to described image, whether the light levels that discriminatory analysis goes out are low
In predetermined threshold；
If the light levels are lower than the predetermined threshold, open flashlight function and carry out light filling.
Further, after the unsuccessful step of identification, comprising:
Issue the prompt of barcode scanning failure.
Further, it if the light levels are lower than the predetermined threshold, opens flashlight function and carries out light filling
The step of, comprising:
If the light levels are lower than the predetermined threshold, being obtained according to the light levels of analysis indicates that described image is bright
The value X of degree calculates the intensity Y of wanted light filling according to the value X of described image light levels according to pre-defined rule；
The flashlight is adjusted to corresponding light intensity according to the intensity Y of required light filling.
Further, the step of unlatching flashlight function progress light filling includes:
In the power bracket that flashlight allows, the first preset time of brightness separation for controlling flashlight is gradually adjusted to most
It is bright；And it controls the second preset time of camera interval and barcode scanning is carried out to described image, and first preset time is greater than described the
Two preset times.
The present invention provides another barcode scanning light compensation method, comprising:
When getting photosensitive instruction, sensitization function is opened, the light intensity of ambient enviroment is incuded；
Judge whether the light intensity is lower than light intensity threshold value；
If the light intensity is lower than the light intensity threshold value, opens flashlight function and carry out light filling, and open
Camera barcode scanning function.
Further, the step of unlatching flashlight function progress light filling includes:
The value Z for indicating light intensity is obtained according to the light intensity of the ambient enviroment incuded, according to the value Z of light intensity
Calculate the intensity W of wanted light filling；
Flashlight is adjusted to corresponding light intensity according to the intensity W of required light filling.
The present invention also provides a kind of barcode scanning light compensating apparatus, comprising:
First barcode scanning unit opens camera barcode scanning function and deposits the image that barcode scanning obtains after obtaining barcode scanning instruction
Enter caching；
First recognition unit is identified for the described image to caching；
First analytical unit, for carrying out light levels analysis to described image, whether the light levels that discriminatory analysis goes out
Lower than predetermined threshold；
First light filling unit opens flashlight function progress if being lower than the predetermined threshold for the light levels
Light filling.
Further, first light filling unit includes:
First computing module obtains if being lower than the predetermined threshold for the light levels according to the light levels of analysis
The value X for indicating described image light levels out calculates wanted light filling according to pre-defined rule according to the value X of described image light levels
Intensity Y；
It is strong to be adjusted to corresponding light for the intensity Y according to required light filling by the first adjustment module for the flashlight
Degree.
The present invention also provides another barcode scanning light compensating apparatus, comprising:
Photosensitive unit opens sensitization function, incudes the light intensity of ambient enviroment after obtaining photosensitive instruction；
Second analytical unit, for judging whether the light intensity is lower than light intensity threshold value；
Second light filling unit opens flashlight function if being lower than the light intensity threshold value for the light intensity
Light filling is carried out, and for opening camera barcode scanning function.
Further, second light filling unit includes:
Second computing module indicates light intensity for obtaining according to the light intensity of the induction ambient enviroment incuded
Value Z calculates the intensity W of wanted light filling according to the value Z of light intensity；
Second light filling unit includes:
Second adjustment module is strong for flashlight to be adjusted to corresponding light according to the intensity W according to required light filling
Degree.
By adopting the above technical scheme, the present invention, which at least has the advantages that, can be imaged light levels according to barcode scanning
Or ambient light intensity automatically opens flashlight and carries out light filling, it is more convenient using operating.
Detailed description of the invention
Fig. 1 is the flow diagram of the barcode scanning light compensation method of one embodiment of the application；
Fig. 2 is the structural schematic diagram of the barcode scanning light compensating apparatus of one embodiment of the application；
Fig. 3 is the flow diagram of the barcode scanning light compensation method of another embodiment of the application；
Fig. 4 is the structural schematic diagram of the barcode scanning light compensating apparatus of another embodiment of the application.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Refering to fig. 1, a kind of barcode scanning light compensation method is provided in one embodiment of the invention, is carried out for mobile terminal in barcode scanning
Light filling includes:
S1, barcode scanning instruction is obtained, opens camera barcode scanning function, barcode scanning is carried out to image, and the image that barcode scanning obtains is deposited
Enter caching；
S2, the described image of caching is identified；
If S3, identification are unsuccessful, light levels analysis is carried out to described image, whether the light levels that discriminatory analysis goes out are low
In predetermined threshold；
If S4, the light levels are lower than the predetermined threshold, open flashlight function and carry out light filling.
As described in above-mentioned steps S1, above-mentioned acquisition barcode scanning instruction is the mobile end with camera barcode scanning and flashlight function
It holds (such as mobile phone), after the barcode scanning function of opening camera, barcode scanning is carried out to image, and the image that barcode scanning is obtained is stored in caching
In.As described in above-mentioned steps S2, the mobile terminals such as mobile phone identify the image cached after barcode scanning；Terminate if identifying successfully
Process enters step S3 if identification is unsuccessful.In the present embodiment to image carry out identification refer to the content in image
It is identified, such as two dimensional code in identification image etc..
As described in above-mentioned steps S3, the mobile terminals such as mobile phone carry out light levels analysis, judgement to the image of recognition failures
Whether the light levels analyzed are lower than predetermined threshold；If comparing result shows: image light levels are lower than predetermined threshold,
Enter step S4.As described in above-mentioned steps S4, the mobile terminals such as mobile phone open flashlight function and carry out light filling.It is carried out again after light filling
Barcode scanning, this makes it possible to overcome barcode scanning failure problem caused by insufficient light.
In one embodiment, after the unsuccessful step S3 of identification, comprising:
S301, the prompt for issuing barcode scanning failure.
As described in above-mentioned steps S301, if image recognition is unsuccessful, the prompt of barcode scanning failure, specific prompting mode are issued
Can indicate the prompt information of image recognition failure for pop-up or issue prompt tone etc..User sees the prompt according to recognition failures
Information or after hearing the prompt tone of recognition failures can become clear to mobile terminal sending to image by the modes such as clicking manually
The instruction of degree analyzing.This method is suitable for mobile terminal cannot be after image recognition failure automatically into as described in step S3
Mobile terminal the step of light levels analysis is carried out to the images of recognition failures scene in.
In one embodiment, if the light levels be lower than the predetermined threshold, open flashlight function into
The step S4 of row light filling, comprising:
If S401, the light levels are lower than the predetermined threshold, being obtained according to the light levels of analysis indicates the figure
As the value X of light levels, the intensity Y of wanted light filling is calculated according to pre-defined rule according to the value X of described image light levels；
S402, the flashlight is adjusted to by corresponding light intensity according to the intensity Y of required light filling.
As described in above-mentioned steps S401, if the light levels are lower than the predetermined threshold, mobile terminal is according to analysis
Light levels obtain indicate described image light levels value X, further according to described image light levels value X according to pre-defined rule
Calculate the intensity Y of wanted light filling.Wherein, the pre-defined rule i.e. certain algorithm, such as: obtain expression described image
It after the value X of light levels, carries out asking poor with the value A of the best light levels of recognizable image, asks the resulting difference after difference to be
Answer light filling intensity Y, i.e. A-X=Y.Then, as described in above-mentioned steps S402, light filling intensity Y is answered to control flashlight further according to calculating
The brightness of cylinder, is adjusted to corresponding light intensity for flashlight, thus can be by the light filling intensity adjustment of flashlight to ideal
State.To recycle camera to carry out barcode scanning, can be obtained light levels and be best suitable for the imaging effect that identification requires.
In one embodiment, the step S4 for opening flashlight function progress light filling includes:
S403, flashlight allow power bracket in, the first preset time of brightness separation for controlling flashlight is gradually adjusted
To most bright；And it controls the second preset time of camera interval and barcode scanning is carried out to described image, and first preset time is greater than institute
State the second preset time.
As described in above-mentioned steps S401', in the power bracket that flashlight allows, the brightness separation first of flashlight is controlled
Preset time is gradually adjusted to most bright；And it controls the second preset time of camera interval and barcode scanning, and described first is carried out to described image
Preset time is greater than second preset time.I.e., it is possible to which the brightness of flashlight most bright is partially drawn from most secretly gradually modulating
It is divided into multiple equal periods, the equal period described in this is called the first preset time.Described multiple equal
Period (the first preset time) in, have to first preset time and meet flashlight in period corresponding to it
Cylinder light filling intensity makes image light levels be able to satisfy the requirement successfully identified at any time, and in first preset time
Interior camera centainly carries out barcode scanning to described image, could theoretically guarantee phase during flashlight gradually brightens in this way
Machine is bound to sweep to the image that light levels meet identification requirement.
Alternatively, in another embodiment, by following scheme: by flashlight by most dark gradually (uniform) be adjusted to it is most bright (or
By most high light to most secretly), the process for adjusting brightness terminates since moment t1 to moment t2；The barcode scanning since moment t1, identification
Again barcode scanning immediately after failure；Within the period of t1~t2, flashlight light filling makes image light levels meet successfully identification
Time at least makes the imaging of camera barcode scanning primary.In torch by the most dark process for being uniformly adjusted to most bright (or by most high light to most secretly)
In, camera persistently carries out barcode scanning to the object of barcode scanning (two dimensional code), as long as having any barcode scanning to identify successfully terminates light filling
Process.But the process for adjusting brightness cannot be too fast, should at least meet enable camera capture/barcode scanning is enough to a light levels
The image that success identifies.
If camera captures in the time range that can satisfy requirements above/image of barcode scanning do not have it is any primary
Successfully identified by mobile terminal, then it is likely used only to the reason of be, due to hand during this gradually changes the light filling of intensity
Shake or barcode scanning target move and have led to miss the best barcode scanning time, namely do not have can recognize within the scope of light levels
Even if candid photograph/barcode scanning arrives but very fuzzy to target two dimensional code or scanning.Above step can so be repeated or by following step
It is rapid:
S404, extends above-mentioned first preset time, and the first preset time of brightness separation for controlling flashlight is gradually adjusted to most
It is bright, and control the second preset time of camera interval and barcode scanning is carried out to described image.
Or by following scheme: being again turned on flashlight and carry out light filling, extend flashlight and be adjusted to by most dark gradually (uniform)
Time required for the process of most bright (or as most high light to most dark) adjusts the process of brightness since moment t3 to moment t4
Terminate, time span t4-t3 > t2-t1；The barcode scanning since moment t3, barcode scanning again immediately after recognition failures.To extend hand
Torch light filling makes image light levels meet the time of successfully identification, and then increases grabbing within the time that can recognize light levels
Bat/barcode scanning number, to improve the success rate of barcode scanning identification.
In one embodiment, the step S4 for opening flashlight function progress light filling includes:
S405, in the power bracket that flashlight allows, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or by
Most it is bright gradually/be uniformly adjusted to it is most dark；And camera recording function is opened, record the image/video of the flashlight light modulation whole story；
S406 intercepts the video-frequency band for meeting identification light levels in described image video；
S407 intercepts one or more pictures from the video-frequency band for meeting identification light levels.
As described in above-mentioned steps S405, if image light levels are lower than the predetermined threshold, in the function that flashlight allows
Within the scope of rate, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or by most it is bright gradually/be uniformly adjusted to most dark；And simultaneously
Camera recording function is opened, the image/video of the flashlight light modulation whole story is recorded.As described in above-mentioned steps S406 and S407, institute is intercepted
The video-frequency band for meeting identification light levels in image/video is stated, and intercepts one or more pictures from video-frequency band.Then, by institute
It states one or more pictures to be identified as identification image, is so obtained with the image for meeting identification light levels
And it successfully identifies.
In one embodiment, the step S4 for opening flashlight function progress light filling includes:
S408, in the power bracket that flashlight allows, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or by
Most it is bright gradually/be uniformly adjusted to it is most dark；And camera recording function is opened, record the image/video of the flashlight light modulation whole story；
S409, records the time point of flashlight difference brightness, and carries out with the time point of described image video corresponding；
S410 is searched the time point for meeting identification light levels in described image video, and according to time point acquisition pair
The flashlight brightness answered is as the first brightness；
Flashlight is adjusted to first brightness by S411, and issues barcode scanning instruction.
As described in above-mentioned steps S408, if image light levels are lower than the predetermined threshold, in the function that flashlight allows
Within the scope of rate, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or by most it is bright gradually/be uniformly adjusted to most dark；And simultaneously
Camera recording function is opened, the image/video of the flashlight light modulation whole story is recorded.As described in above-mentioned steps S409, it is bright to adjust flashlight
While spending, the time point of flashlight difference brightness is recorded, and is carried out with the time point of image/video corresponding.Such as above-mentioned steps
Described in S410, the time point for meeting identification light levels is searched in the image/video recorded.The method specifically searched can be with
By detection image video overexposure and excessively dark, overexposure and excessively dark situation are excluded, it is remaining for normal exposure (namely brightness satisfaction
Identification requires), find out a frame of certain normal exposure, it can think that the light emission luminance of the flashlight when recording the frame can reach
To the light filling requirement for identifying barcode scanning successfully, the time point of the frame is found out, according to the time point and corresponding record hand
The brightness when time point of torch brightness can obtain flashlight at the time point, using the brightness as the first brightness.As above
It states described in step S411, is again turned on flashlight and is adjusted to the first brightness progress light filling, and issue barcode scanning instruction.Receive barcode scanning
After instruction, camera barcode scanning function is opened, barcode scanning is carried out to image, can so obtain satisfaction identification light levels requirement
Image in 2 D code, and then successfully identify.Wherein, the method for detection image overexposure generally includes luminance threshold method and LC algorithm
(LC is the abbreviation of luminance contrast, is the meaning of " brightness contrast ", and the full name of LC algorithm is marking area detection
LC algorithm).The defect of luminance threshold method is also for non-overexposure region to be detected as overexposure region, and occur excessively detecting asks
Topic.The overexposure luminous point of LC algorithm detection is not enough concentrated, and the overexposure region of monolith connection is not formed, and is unfavorable for monitoring to overexposure
The detection of light.Thus, in the present embodiment, can by introduce image overexposure region bright face feature and boundary neighborhood feature,
By regularization logic nonlinear regression algo, feature extraction is carried out to overexposure light image training sample, and obtain by training
Sorter model, to realize the detection to image overexposure.
In one embodiment, the acquisition barcode scanning instruction, opens camera barcode scanning function, carries out barcode scanning to image, and will
Before the step S1 for the image deposit caching that barcode scanning obtains, comprising:
S01, when getting photosensitive instruction, sensitization function is opened, the light intensity of ambient enviroment is incuded；
S02, judge whether the light intensity is lower than light intensity threshold value；
If S03, the light intensity are lower than the light intensity threshold value, open flashlight function and carry out light filling, and
Issue the barcode scanning instruction.
As described in above-mentioned steps S01 to S03, when getting photosensitive instruction, sensitization function is opened, the light of ambient enviroment is incuded
Line intensity；Then, judge whether the light intensity is lower than light intensity threshold value；If the light intensity is strong lower than the light
Threshold value is spent, then opens flashlight function and carries out light filling, and issues the barcode scanning instruction.After the instruction of acquisition for mobile terminal barcode scanning,
Camera barcode scanning function is opened, barcode scanning is carried out to image.If barcode scanning identification is unsuccessful, then carries out light levels point to described image
Whether analysis, the light levels that discriminatory analysis goes out are lower than predetermined threshold；If so, carrying out essence by the light filling algorithm in above embodiments
Quasi- light filling, to reach better light filling effect, to barcode scanning success.
A kind of barcode scanning light compensating apparatus is also provided in one embodiment of the invention, as shown in Figure 2, comprising:
First barcode scanning unit 10, after obtaining barcode scanning instruction, unlatching camera barcode scanning function and the image for obtaining barcode scanning
Deposit caching；
First recognition unit 20, identifies for the described image to caching；
First analytical unit 30, for carrying out light levels analysis to described image, the light levels that discriminatory analysis goes out are
It is no to be lower than predetermined threshold；
First light filling unit 40, if for the light levels be lower than the predetermined threshold, open flashlight function into
Row light filling.
After first barcode scanning unit 10 obtains barcode scanning instruction, after the barcode scanning function of opening camera, barcode scanning is carried out to image, and will
In the image deposit caching that barcode scanning obtains.First recognition unit 20 identifies the image cached after barcode scanning；If identifying successfully
Then terminate light filling process, carries out light levels point using image of first analytical unit 30 to recognition failures if identification is unsuccessful
Whether analysis, the light levels that discriminatory analysis goes out are lower than predetermined threshold.If it is determined that analysis the result shows that: image light levels are lower than
Predetermined threshold then opens flashlight function using the first light filling unit 40 and carries out light filling.Barcode scanning is carried out after light filling again, thus can
Enough overcome barcode scanning failure problem caused by insufficient light.
In one embodiment, first analytical unit 30 includes:
Cue module when unsuccessful for identification, issues the prompt of barcode scanning failure.In order to automatically turn on first no
In the case where the relevant function of analytical unit 30, user issues the first analytical unit 30 open analysis manually according to prompt
Instruction.
In one embodiment, first light filling unit 40 includes:
First computing module obtains if being lower than the predetermined threshold for the light levels according to the light levels of analysis
The value X for indicating described image light levels out calculates wanted light filling according to pre-defined rule according to the value X of described image light levels
Intensity Y；
It is strong to be adjusted to corresponding light for the intensity Y according to required light filling by the first adjustment module for the flashlight
Degree.
In above-mentioned first computing module, if the light levels are lower than the predetermined threshold, mobile terminal is according to analysis
Light levels obtain the value X for indicating described image light levels, further according to described image light levels value X according to pre- set pattern
Then calculate the intensity Y of wanted light filling.Wherein, the pre-defined rule i.e. certain algorithm, such as: obtaining indicates the figure
As light levels value X after, carry out asking poor with the value A of the best light levels of recognizable image, resulting difference is i.e. after seeking difference
To answer light filling intensity Y, i.e. A-X=Y.Then, in above-mentioned first adjustment module, light filling intensity Y is answered to control further according to calculating
Flashlight is adjusted to corresponding light intensity by the brightness of flashlight, thus can be by the light filling intensity adjustment of flashlight extremely
Perfect condition.To recycle camera to carry out barcode scanning, can be obtained light levels and be best suitable for the imaging effect that identification requires.
In one embodiment, first light filling unit 40 includes:
First dimming controlling module, in the power bracket that flashlight allows, controlling the brightness separation of flashlight
One preset time is gradually adjusted to most bright；And it controls the second preset time of camera interval and barcode scanning, and described the is carried out to described image
One preset time is greater than second preset time.
In above-mentioned first dimming controlling module, in the power bracket that flashlight allows, between the brightness for controlling flashlight
It is gradually adjusted to every the first preset time most bright；And it controls the second preset time of camera interval and barcode scanning, and institute is carried out to described image
The first preset time is stated greater than second preset time.I.e., it is possible to the brightness of flashlight secretly gradually be modulated from most most bright etc.
It is divided into multiple equal periods with dividing, the equal period described in this is called the first preset time.Described more
In a equal period (the first preset time), period of the first preset time satisfaction corresponding to it is had to
Interior flashlight light filling intensity makes image light levels be able to satisfy the requirement successfully identified at any time, and first pre- at this
If camera centainly carries out barcode scanning to described image in the time, it could theoretically guarantee the process gradually to brighten in flashlight in this way
In, camera is bound to sweep to the image that light levels meet identification requirement.
In one embodiment, first light filling unit 40 includes:
Second dimming controlling module, in the power bracket that flashlight allows, control flashlight by most it is dark gradually/
It is even to it is most bright or by most it is bright gradually/be uniformly adjusted to it is most dark；And camera recording function is opened, record the flashlight light modulation whole story
Image/video；
First video-frequency band interception module, for intercepting the video-frequency band for meeting identification light levels in described image video；
First picture interception module, for the one or more figures of interception from the video-frequency band for meeting identification light levels
Piece.
In above-mentioned second dimming controlling module, if image light levels are lower than the predetermined threshold, permit in flashlight
Perhaps in power bracket, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or by most it is bright gradually/be uniformly adjusted to most dark；
And camera recording function is opened simultaneously, record the image/video of the flashlight light modulation whole story.In the first video-frequency band interception module and
In one picture interception module, the video-frequency band for meeting identification light levels in described image video is intercepted, and intercept from video-frequency band
One or more pictures.Then, it identifies one or more of pictures as identification image, can so obtain
The image of identification light levels must be met and successfully identified.
Another barcode scanning light compensation method is proposed in the embodiment of the present invention, as shown in Figure 3, comprising:
S1', when getting photosensitive instruction, sensitization function is opened, the light intensity of ambient enviroment is incuded；
S2', judge whether the light intensity is lower than light intensity threshold value；
If S3', the light intensity are lower than the light intensity threshold value, open flashlight function and carry out light filling, and
Open camera barcode scanning function.
As described in above-mentioned steps S1', the above-mentioned photosensitive instruction of acquisition is with camera barcode scanning, flashlight and light intensity sense
The smart machine (such as mobile phone) for answering function first obtains photosensitive instruction before starting barcode scanning, opens sensitization function, induction week
The light intensity in collarette border.As described in above-mentioned steps S2', the light intensity of ambient enviroment is analyzed, judges the light
Whether intensity is lower than light intensity threshold value.As described in above-mentioned steps S3', if the light intensity of ambient enviroment is strong lower than the light
Threshold value is spent, then opens flashlight function and carries out light filling, and open camera barcode scanning function.To the two dimensional code for shooting camera
The light levels of image meet the requirement of identification.
In one embodiment, it if the light intensity is lower than the light intensity threshold value, opens flashlight function and carries out
The step S3' of light filling includes:
S301', the value Z for indicating light intensity is obtained according to the light intensity of the ambient enviroment incuded, it is strong according to light
The value Z of degree calculates the intensity W of wanted light filling.
S302', the flashlight is adjusted to by corresponding light intensity according to the intensity W of required light filling.
As described in above-mentioned steps S301', mobile phone etc. has camera barcode scanning, the intelligence of flashlight and light intensity inducing function
Equipment according to the light intensity of the ambient enviroment incuded obtain indicate light intensity value Z, according to the value Z of light intensity according to
Pre-defined rule calculates the intensity W of wanted light filling.Wherein, the pre-defined rule i.e. certain algorithm, such as: obtain expression
It after the value Z of described image light levels, carries out asking poor with the value A' of the best light levels of recognizable image, asks resulting after difference
Difference is to answer light filling intensity W, i.e. A'-Z=W.As described in above-mentioned steps S302', according to the intensity W of required light filling by flashlight
Cylinder is adjusted to corresponding light intensity, thus can be by the light filling intensity adjustment of flashlight to perfect condition.To recycle
Camera carries out barcode scanning, can be obtained light levels and is best suitable for the imaging effect that identification requires.
In one embodiment, if the light intensity be lower than the light intensity threshold value, open flashlight function into
The step S3' of row light filling can also use method identical with above-mentioned S4, such as:
S303', in the power bracket that flashlight allows, by flashlight by most dark gradually (uniform) be adjusted to it is most bright (or
By most high light to most secretly), the process for adjusting brightness terminates since moment t5 to moment t6；The barcode scanning since moment t5, identification
Again barcode scanning immediately after failure；Within the period of t5~t6, flashlight light filling makes image light levels meet identification requirement
Time at least make the imaging of camera barcode scanning primary；If the image that institute's barcode scanning obtains within the period of t5~t6 is not identified as
Function then enters in next step；
S304', extend the process institute that flashlight is adjusted to most bright (or by most high light to most secretly) by most dark gradually (uniform)
The time needed, the process for adjusting brightness terminate since moment t7 to moment t8, t8-t7 > t6-t5；It is swept since moment t7
Code, barcode scanning again immediately after recognition failures.To, extend flashlight light filling make image light levels meets successfully identify when
Between, and then increase candid photograph/barcode scanning number within the time that can recognize light levels, to improve the success rate of barcode scanning identification.
In one embodiment, it if the light intensity is lower than the light intensity threshold value, opens flashlight function and carries out
The step S3' of light filling includes:
S305', in the power bracket that flashlight allows, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or
By most it is bright gradually/be uniformly adjusted to it is most dark；And camera recording function is opened, record the image/video of the flashlight light modulation whole story；
Meet the video-frequency band of identification light levels in S306', interception described image video；
S307', one or more pictures are intercepted from the video-frequency band for meeting identification light levels.
As described in above-mentioned steps S305', if image light levels are lower than the predetermined threshold, in the function that flashlight allows
Within the scope of rate, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or by most it is bright gradually/be uniformly adjusted to most dark；And simultaneously
Camera recording function is opened, the image/video of the flashlight light modulation whole story is recorded.As described in above-mentioned steps S306' and S307', interception
Meet the video-frequency band of identification light levels in described image video, and intercepts one or more pictures from video-frequency band.Then, will
One or more of pictures are identified as identification image, are so obtained with the figure for meeting identification light levels
Picture simultaneously successfully identifies.
In one embodiment, it if the light intensity is lower than the light intensity threshold value, opens flashlight function and carries out
The step S3' of light filling includes:
S308', in the power bracket that flashlight allows, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or
By most it is bright gradually/be uniformly adjusted to it is most dark；And camera recording function is opened, record the image/video of the flashlight light modulation whole story；
S309', the time point for recording the brightness of flashlight difference, and carry out with the time point of described image video corresponding；
S310', it searches the time point for meeting identification light levels in described image video, and according to time point acquisition pair
The flashlight brightness answered is as the first brightness；
S311', flashlight is adjusted to first brightness, and issues barcode scanning instruction.
As described in above-mentioned steps S308', if image light levels are lower than the predetermined threshold, in the function that flashlight allows
Within the scope of rate, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or by most it is bright gradually/be uniformly adjusted to most dark；And simultaneously
Camera recording function is opened, the image/video of the flashlight light modulation whole story is recorded.As described in above-mentioned steps S309', flashlight is adjusted
While brightness, the time point of flashlight difference brightness is recorded, and is carried out with the time point of described image video corresponding.It is such as above-mentioned
Described in step S310', in the image/video recorded search meet identification light levels time point, and with image/video
Time point is corresponded to.The method specifically searched can exclude overexposure and excessively dark by detection image video overexposure and excessively dark
Situation, remaining is normal exposure (namely brightness meets identification and requires), finds out a frame of certain normal exposure, it can think
When recording the frame, the light emission luminance of flashlight can reach the light filling requirement for identifying barcode scanning successfully, find out the time of the frame
Point, when can obtain flashlight at the time point according to the time point at the time point and corresponding record flashlight brightness
Brightness, using the brightness as the first brightness.As described in above-mentioned steps S311', being again turned on flashlight, to be adjusted to described first bright
Degree carries out light filling, and issues barcode scanning instruction.After receiving barcode scanning instruction, camera barcode scanning function is opened, barcode scanning is carried out to image, in this way
Meet the image in 2 D code for identifying light levels requirement once that can obtain, and then successfully identifies.Wherein, detection image overexposure
Method generally include luminance threshold method and LC algorithm (LC be the abbreviation of luminance contrast, is " brightness contrast "
The meaning, the full name of LC algorithm are the LC algorithms of marking area detection).The defect of luminance threshold method is non-overexposure region
It is detected as overexposure region, the problem of excessively detection occurs.The overexposure luminous point of LC algorithm detection is not enough concentrated, and monolith is not formed
The overexposure region of connection is unfavorable for monitoring the detection to overexposure.Thus, it in the present embodiment, can be by introducing image mistake
The bright face feature and boundary neighborhood feature of exposure area instruct overexposure light image by regularization logic nonlinear regression algo
Practice sample and carry out feature extraction, and sorter model is obtained by training, to realize the detection to image overexposure.
In one embodiment, if the light intensity is lower than the light intensity threshold value, flashlight function is opened
It can be carried out light filling, and the step S3' of unlatching camera barcode scanning function includes:
S31', barcode scanning instruction is obtained, opens camera barcode scanning function, barcode scanning, and the image that barcode scanning is obtained are carried out to image
Deposit caching；
S32', the described image of caching is identified；
If S33', identification are unsuccessful, light levels analysis is carried out to described image, whether is the light levels that discriminatory analysis goes out
Lower than predetermined threshold；
If S34', the light levels are lower than the predetermined threshold, open flashlight function and carry out light filling.
As described in above-mentioned steps S31' to S33', the instruction of acquisition for mobile terminal barcode scanning opens camera barcode scanning function, to image
Barcode scanning is carried out, and the image that barcode scanning is obtained is stored in caching.Then, the described image of caching is identified；If identification not at
Function carries out light levels analysis to described image, and whether the light levels that discriminatory analysis goes out are lower than predetermined threshold.Such as above-mentioned steps
Described in S34', if the light levels are lower than the predetermined threshold, open flashlight function and carry out light filling.Wherein, step
S34' opens the method that flashlight function carries out light filling, can use in above embodiments, carries out bright journey to described image
Whether degree analysis, the light levels that discriminatory analysis goes out are lower than predetermined threshold；If so, precisely being mended by the above light filling algorithm
Light, such as: after obtaining the value X' for indicating described image light levels, carried out with the value A " of the best light levels of recognizable image
Ask poor, seeking resulting difference after difference is to answer light filling intensity Y', i.e. A "-X'=Y'.Then, light filling intensity is answered further according to calculating
Y' controls the brightness of flashlight, and flashlight is adjusted to corresponding light intensity, thus can be by the light filling intensity of flashlight
It is adjusted to perfect condition.To recycle camera to carry out barcode scanning, can be obtained light levels and be best suitable for the imaging effect that identification requires
Fruit.
Another barcode scanning light compensating apparatus is also provided in one embodiment of the invention, as shown in Figure 4, comprising:
Photosensitive unit 10' opens sensitization function, incudes the light intensity of ambient enviroment after obtaining photosensitive instruction；
Second analytical unit 20', for judging whether the light intensity is lower than light intensity threshold value；
Second light filling unit 30' opens flashlight function if being lower than the light intensity threshold value for the light intensity
It can be carried out light filling, and open camera barcode scanning function.
Before starting barcode scanning, above-mentioned photosensitive unit 10' first obtains photosensitive instruction, opens sensitization function, incudes surrounding ring
The light intensity in border.Second analytical unit 20' analyzes the light intensity of ambient enviroment, whether judges the light intensity
Lower than light intensity threshold value.If the light intensity of ambient enviroment is lower than the light intensity threshold value, the second light filling unit 30' is opened
It opens flashlight function and carries out light filling, and open camera barcode scanning function.To the bright journey for the image in 2 D code for shooting camera
Degree meets the requirement of identification.
In one embodiment, the second light filling unit 30' includes:
Second computing module indicates light intensity for obtaining according to the light intensity of the induction ambient enviroment incuded
Value Z calculates the intensity W of wanted light filling according to the value Z of light intensity；
Second adjustment module is strong for flashlight to be adjusted to corresponding light according to the intensity W according to required light filling
Degree.
In above-mentioned second computing module, being obtained according to the light intensity of the ambient enviroment incuded indicates light intensity
Value Z calculates the intensity W of wanted light filling according to the value Z of light intensity according to pre-defined rule.Wherein, the pre-defined rule is also
It is certain algorithm, such as: after obtaining the value Z for indicating described image light levels, the best light levels with recognizable image
Value A' carry out asking poor, seeking resulting difference after difference is to answer light filling intensity W, i.e. A'-Z=W.In above-mentioned second adjustment module
In, flashlight is adjusted to by corresponding light intensity according to the intensity W of required light filling, it thus can be by the light filling of flashlight
Intensity adjustment is to perfect condition.To, recycle camera carry out barcode scanning, can be obtained light levels be best suitable for identification require at
As effect.
In one embodiment, the second light filling unit 30' includes:
Third dimming controlling module, in the power bracket that flashlight allows, controlling the brightness separation of flashlight
Three preset times are gradually adjusted to most bright；And it controls the 4th preset time of camera interval and barcode scanning, and described the is carried out to described image
Three preset times are greater than the 4th preset time.
In above-mentioned third dimming controlling module, in the power bracket that flashlight allows, between the brightness for controlling flashlight
It is gradually adjusted to every third preset time most bright；And it controls the 4th preset time of camera interval and barcode scanning, and institute is carried out to described image
Third preset time is stated greater than the 4th preset time.I.e., it is possible to the brightness of flashlight secretly gradually be modulated from most most bright etc.
It is divided into multiple equal periods with dividing, the equal period described in this is called third preset time.Described more
In a equal period (third preset time), period of the third preset time satisfaction corresponding to it is had to
Interior flashlight light filling intensity makes image light levels be able to satisfy the requirement successfully identified at any time, and pre- in the third
If camera centainly carries out barcode scanning to described image in the time, it could theoretically guarantee the process gradually to brighten in flashlight in this way
In, camera is bound to sweep to the image that light levels meet identification requirement.
In one embodiment, the second light filling unit 30' includes:
4th dimming controlling module, in the power bracket that flashlight allows, control flashlight by most it is dark gradually/
It is even to it is most bright or by most it is bright gradually/be uniformly adjusted to it is most dark；And camera recording function is opened, record the flashlight light modulation whole story
Image/video；
Second video-frequency band interception module, for intercepting the video-frequency band for meeting identification light levels in described image video；
Second picture interception module, for the one or more figures of interception from the video-frequency band for meeting identification light levels
Piece.
In above-mentioned 4th dimming controlling module, if image light levels are lower than the predetermined threshold, permit in flashlight
Perhaps in power bracket, control flashlight by most it is dark gradually/be uniformly adjusted to it is most bright or by most it is bright gradually/be uniformly adjusted to most dark；
And camera recording function is opened simultaneously, record the image/video of the flashlight light modulation whole story.In the second video-frequency band interception module and
In two picture interception modules, the video-frequency band for meeting identification light levels in described image video is intercepted, and intercept from video-frequency band
One or more pictures.Then, it identifies one or more of pictures as identification image, can so obtain
The image of identification light levels must be met and successfully identified.
In conclusion the barcode scanning light compensation method and device that provide in the embodiment of the present invention, first carry out barcode scanning identification to image,
If identification is unsuccessful, light levels analytical judgment is carried out to described image, opens hand if light levels are lower than predetermined threshold
Torch function carries out light filling；Alternatively, the light intensity of ambient enviroment is first incuded, if the light intensity is lower than light intensity threshold
Value then opens flashlight function and carries out light filling, and opens camera barcode scanning function and carry out barcode scanning.Automatic light-supplementing can be carried out, is mended
Light effect is good, operates with more convenient.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of barcode scanning light compensation method characterized by comprising
Barcode scanning instruction is obtained, camera barcode scanning function is opened, barcode scanning is carried out to image, and the image that barcode scanning is obtained is stored in caching；
The described image of caching is identified；
If identification is unsuccessful, light levels analysis is carried out to described image, it is pre- whether the light levels that discriminatory analysis goes out are lower than
Determine threshold value；
If the light levels are lower than the predetermined threshold, open flashlight function and carry out light filling.
2. barcode scanning light compensation method according to claim 1, which is characterized in that after the unsuccessful step of identification, packet
It includes:
Issue the prompt of barcode scanning failure.
3. barcode scanning light compensation method according to claim 1 or 2, which is characterized in that if the light levels are lower than institute
Predetermined threshold is stated, then opens the step of flashlight function carries out light filling, comprising:
If the light levels are lower than the predetermined threshold, being obtained according to the light levels of analysis indicates described image light levels
Value X, the intensity Y of wanted light filling is calculated according to pre-defined rule according to the value X of described image light levels；
The flashlight is adjusted to corresponding light intensity according to the intensity Y of required light filling.
4. barcode scanning light compensation method according to claim 1, which is characterized in that the flashlight function of opening carries out light filling
Step includes:
Flashlight allow power bracket in, control flashlight the first preset time of brightness separation be gradually adjusted to it is most bright；And
It controls the second preset time of camera interval and barcode scanning is carried out to described image, and first preset time is greater than described second and presets
Time.
5. a kind of barcode scanning light compensation method characterized by comprising
When getting photosensitive instruction, sensitization function is opened, the light intensity of ambient enviroment is incuded；
Judge whether the light intensity is lower than light intensity threshold value；
If the light intensity is lower than the light intensity threshold value, opens flashlight function and carry out light filling, and open camera
Barcode scanning function.
6. barcode scanning light compensation method according to claim 5, which is characterized in that the flashlight function of opening carries out light filling
Step includes:
The value Z for indicating light intensity is obtained according to the light intensity of the ambient enviroment incuded, is calculated according to the value Z of light intensity
The intensity W of wanted light filling；
The flashlight is adjusted to corresponding light intensity according to the intensity W of required light filling.
7. a kind of barcode scanning light compensating apparatus characterized by comprising
First barcode scanning unit opens camera barcode scanning function and the image deposit for obtaining barcode scanning is slow after obtaining barcode scanning instruction
It deposits；
First recognition unit is identified for the described image to caching；
First analytical unit, for carrying out light levels analysis to described image, whether the light levels that discriminatory analysis goes out are lower than
Predetermined threshold；
First light filling unit opens flashlight function and carries out light filling if being lower than the predetermined threshold for the light levels.
8. barcode scanning light compensating apparatus according to claim 7, which is characterized in that first light filling unit includes:
First computing module obtains table according to the light levels of analysis if being lower than the predetermined threshold for the light levels
The value X for showing described image light levels calculates the strong of wanted light filling according to pre-defined rule according to the value X of described image light levels
Spend Y；
First adjustment module, for the flashlight to be adjusted to corresponding light intensity according to the intensity Y of required light filling.
9. a kind of barcode scanning light compensating apparatus characterized by comprising
Photosensitive unit opens sensitization function, incudes the light intensity of ambient enviroment after obtaining photosensitive instruction；
Second analytical unit, for judging whether the light intensity is lower than light intensity threshold value；
Second light filling unit opens flashlight function progress if being lower than the light intensity threshold value for the light intensity
Light filling, and open camera barcode scanning function.
10. barcode scanning light compensating apparatus according to claim 9, which is characterized in that second light filling unit includes:
Second computing module, for obtaining the value Z for indicating light intensity according to the light intensity of the induction ambient enviroment incuded,
The intensity W of wanted light filling is calculated according to the value Z of light intensity；
Second adjustment module, for flashlight to be adjusted to corresponding light intensity according to according to the intensity W of required light filling.
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| CN201810924541.1A CN109165539A (en) | 2018-08-14 | 2018-08-14 | Barcode scanning light compensation method and device |
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| CN201810924541.1A CN109165539A (en) | 2018-08-14 | 2018-08-14 | Barcode scanning light compensation method and device |
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Application publication date: 20190108 |