CN109801213A - Picture Spot detection method, apparatus and terminal device is imaged in flake - Google Patents
Picture Spot detection method, apparatus and terminal device is imaged in flake Download PDFInfo
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- CN109801213A CN109801213A CN201910104677.2A CN201910104677A CN109801213A CN 109801213 A CN109801213 A CN 109801213A CN 201910104677 A CN201910104677 A CN 201910104677A CN 109801213 A CN109801213 A CN 109801213A
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Abstract
The present invention is suitable for field of camera technology, provides flake imaging picture Spot detection method and device, comprising: obtain original image, wherein the original image is the rectangular image that picture is imaged comprising circle fisheye；The original image is scanned by desired guiding trajectory, obtain the first pixel and the second pixel, wherein first pixel is first pixel that the gray value from left to right scanned by column is greater than or equal to default gray threshold, and second pixel is first pixel that the gray value scanned by column from right to left is greater than or equal to default gray threshold；According to first pixel and second pixel, the center of the flake imaging picture is calculated.The embodiment of the present invention being capable of center that is inexpensive, accurately detecting flake imaging picture.
Description
Technical field
The invention belongs to field of camera technology more particularly to a kind of flake imaging picture Spot detection method, apparatus and ends
End equipment.
Background technique
Fish eye lens is that a kind of focal length is shorter and visual angle is close or equal to 180 ° of camera lens, is a kind of extreme wide-angle lens
Head.Imaging sensor can be realized into the Image Acquisition of ultra-large vision field range with fish eye camera made of fish eye lens collocation and taken the photograph
As monitoring.
In fish eye camera, the raw frames region of imaging sensor acquisition is rectangle, which includes saturating
Fish-eye circular flake imaging region is crossed, the rectangle in circular diameter close to the raw frames region of flake imaging region is short
Side.Since usual imaging sensor is not overlapped with fish eye lens, image is likely to result in without correction
Distortion, in image inactive area it is excessive and situations such as picture loss is effectively imaged, therefore usually require to raw frames region into
Row imaging picture cent(e)ring finds out the center of imaging picture and carries out picture adjustment, to improve general image effect.
The core of the imaging picture cent(e)ring of fish eye camera is to find out the center of flake imaging picture.It is existing
Flake is imaged there are two types of picture Spot detection methods, and a kind of method is that a picture is shot under uniform source of light, using related soft
The most bright spot of image on picture is calculated as picture center in part；Another method is that shooting includes circle under white light source
The picture of shape image chooses any point on picture and establishes coordinate system as origin, then chooses on circular image circumference at least
Three points, obtain 1 points of coordinate, and tondo is calculated according to round normal equation and 1 points of coordinate
Face center.
First method needs to guarantee that entire imaging picture brightness is uniform, has strict demand to light source and style of shooting,
The brightness in picture center and surrounding fraction region is not much different even without difference simultaneously, if calculating brightness software resolution ratio
The picture center accuracy that not enough will lead to acquisition is not high.Second method also there are certain requirements light source, topological complexity compared with
Height, additionally, due to camera lens inner wall imaging etc. interference circular image circumference define it is relatively difficult, therefore on circumference each point choosing
Taking all has certain error, and the corresponding error of one point of every increase also will increase, and is calculated caused by the center of circle using at least three point
Error also can be bigger than normal.
In conclusion there is cost and complexity height, precision are low for existing flake imaging picture Spot detection method
Defect.
Summary of the invention
In view of this, the embodiment of the invention provides flake imaging picture Spot detection method, apparatus and terminal device, with
Solve the problems, such as in the prior art how low cost, accurately detect flake imaging picture center.
The first aspect of the embodiment of the present invention provides a kind of flake imaging picture Spot detection method, comprising:
Obtain original image, wherein the original image is the rectangular image that picture is imaged comprising circle fisheye；
The original image is scanned by desired guiding trajectory, the first pixel and the second pixel are obtained, wherein first picture
Vegetarian refreshments is first pixel that the gray value that from left to right scans by column is greater than or equal to default gray threshold, described the
Two pixels are first pixel that the gray value scanned by column from right to left is greater than or equal to default gray threshold；
According to first pixel and second pixel, the center of the flake imaging picture is calculated.
The second aspect of the embodiment of the present invention provides a kind of flake imaging picture central detection device, comprising:
Acquiring unit, for obtaining original image, wherein the original image is the square that picture is imaged comprising circle fisheye
Shape image；
Scanning element, for scanning the original image, the first pixel of acquisition and the second pixel by desired guiding trajectory,
Described in the first pixel be that the gray value that from left to right scans by column is greater than or equal to default gray threshold first
Pixel, second pixel are that the gray value that scans by column from right to left is greater than or equal to the of default gray threshold
One pixel；
First computing unit, for calculating the flake imaging according to first pixel and second pixel
The center of picture.
The third aspect of the embodiment of the present invention provides a kind of terminal device, including memory, processor and is stored in
In the memory and the computer program that can run on the processor, when the processor executes the computer program
It realizes such as the step of flake imaging picture Spot detection method.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, is realized when the computer program is executed by processor such as flake imaging picture center inspection
The step of survey method.
Existing beneficial effect is the embodiment of the present invention compared with prior art: former by scanning in the embodiment of the present invention
Beginning image obtains the pixel that two gray values are greater than or equal to default gray threshold, the two pixels from both direction respectively
Point is two points on circle fisheye imaging diameter of picture area, and the center for calculating the two points just can obtain flake imaging picture
Center, due to do not need special light source and to software for calculation resolution requirement it is not high, and can by Scanning Detction gray value
Obtain two points on circle fisheye imaging diameter of picture area accurately to obtain the center of flake imaging picture, therefore can be
The precision of flake imaging picture Spot detection is improved in the case where controlling cost.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the implementation process signal of the first flake imaging picture Spot detection method provided in an embodiment of the present invention
Figure；
Fig. 2 is a kind of exemplary diagram of the raw frames of flake camera module shooting provided in an embodiment of the present invention；
Fig. 3 is a kind of scanning track schematic diagram of flake imaging picture Spot detection method provided in an embodiment of the present invention；
Fig. 4 is the scanning track signal of another flake imaging picture Spot detection method provided in an embodiment of the present invention
Figure；
Fig. 5 is the implementation process signal of second of flake imaging picture Spot detection method provided in an embodiment of the present invention
Figure；
Fig. 6 is a kind of image procossing schematic diagram of flake imaging picture Spot detection method provided in an embodiment of the present invention；
Fig. 7 is the image procossing signal of another flake imaging picture Spot detection method provided in an embodiment of the present invention
Figure；
Fig. 8 is a kind of schematic diagram of flake imaging picture cent(e)ring provided in an embodiment of the present invention；
Fig. 9 is a kind of schematic diagram of flake imaging picture central detection device provided in an embodiment of the present invention；
Figure 10 is the schematic diagram of terminal device provided in an embodiment of the present invention.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " instruction is described special
Sign, entirety, step, operation, the presence of element and/or component, but be not precluded one or more of the other feature, entirety, step,
Operation, the presence or addition of element, component and/or its set.
It is also understood that mesh of the term used in this present specification merely for the sake of description specific embodiment
And be not intended to limit the application.As present specification and it is used in the attached claims, unless on
Other situations are hereafter clearly indicated, otherwise " one " of singular, "one" and "the" are intended to include plural form.
It will be further appreciated that the term "and/or" used in present specification and the appended claims is
Refer to any combination and all possible combinations of one or more of associated item listed, and including these combinations.
As used in this specification and in the appended claims, term " if " can be according to context quilt
Be construed to " when ... " or " once " or " in response to determination " or " in response to detecting ".Similarly, phrase " if it is determined that " or
" if detecting [described condition or event] " can be interpreted to mean according to context " once it is determined that " or " in response to true
It is fixed " or " once detecting [described condition or event] " or " in response to detecting [described condition or event] ".
In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot in the description of the present application
It is interpreted as indication or suggestion relative importance.
Embodiment one:
Fig. 1 shows the process signal of the first flake imaging picture Spot detection method provided by the embodiments of the present application
Figure, details are as follows:
In S101, original image is obtained, wherein the original image is the histogram that picture is imaged comprising circle fisheye
Picture.
Image taking is carried out by the flake camera module being made of imaging sensor and fish eye lens, obtains original graph
Picture.Original image is rectangular image, which contains circular flake imaging picture, is illustrated in figure 2 a kind of original
The exemplary diagram of image.The actual photographed imaging region of original image is fallen in circular flake imaging picture, and the flake is imaged
The usual gray value of picture is higher, i.e., the scene usually shot is not black or more gloomy scene；And other regions are
The inactive area of black, is known as unimaged region for the inactive area here, and usual flake is imaged in the border circular areas of picture
Gray value is higher than unimaged region.
In S102, the original image is scanned by desired guiding trajectory, obtains the first pixel and the second pixel, wherein institute
Stating the first pixel is first pixel that the gray value from left to right scanned by column is greater than or equal to default gray threshold
Point, second pixel are first that the gray value scanned by column from right to left is greater than or equal to default gray threshold
Pixel.
As shown in figure 3, it using A point as coordinate origin is x with the direction AD that four vertex of original image, which are respectively A, B, C, D,
Axis positive direction establishes reference axis by y-axis direction of the direction AB, wherein positive direction of the x-axis is direction from left to right, x-axis losing side
To direction as from right to left.
Original image is scanned according to desired guiding trajectory, from left to right scans by column the gray value detected on the original image,
First pixel that obtained gray value is greater than or equal to default gray threshold is the first pixel (C i.e. as shown in Figure 31
Point).Such as using A point as starting point, the gray value on positive direction of the y-axis Scanning Detction original image completes first row up to B point
Scanning；Then to be located at ash of the neighbor pixel on the right of A point as starting point, on positive direction of the y-axis Scanning Detction original image
Angle value completes the second column scan until the point on the contact side BC；And so on, every time be located at the side AD on and and previous column
The point for scanning the right neighbour of starting point is starting point, the gray value on positive direction of the y-axis vertical sweep detection original image, until being located at BC
Until point on side, i.e., original image is scanned by column from left to right with same vertical sweep direction (positive direction of the y-axis), until scanning
It is more than or equal to the pixel of default gray threshold to first gray value, and the point is recorded as the first pixel.Alternatively,
(as shown in Figure 4) using A point as starting point, the gray value on positive direction of the y-axis Scanning Detction original image completes first up to B point
Column scan；Then to be located at the neighbor pixel on the right of B point as starting point, along negative direction of the y-axis Scanning Detction original image
Gray value, until the point position on the contact side AD, completes the second column scan；And so on, every time with right with previous column sweep stopping point
Adjacent point is starting point, the gray value in the positive direction of y-axis or negative direction vertical sweep detection original image, i.e., along Z-shaped
Type from left to right scans by column original image, until scanning is more than or equal to the picture of default gray threshold to first gray value
Vegetarian refreshments, and the point is recorded as the first pixel.
It should be understood that original can also from left to right be scanned by column with same vertical sweep direction (negative direction of the y-axis) using B point as starting point
Beginning image, or original image is from left to right scanned by column along Z-shaped using B point as starting point, it is greater than or waits to obtains gray value
In first pixel of default gray threshold, i.e. the first pixel.
Similarly, original image is scanned according to desired guiding trajectory, is scanned by column on the detection original image from right to left
Gray value, first pixel that obtained gray value is greater than or equal to default gray threshold is the second pixel (i.e. such as Fig. 3 institute
The C shown2Point).As shown in figure 3, scanning by column original from right to left for starting point with D point (or C point) with same vertical sweep direction
Beginning image until scanning is more than or equal to the pixel of default gray threshold to first gray value, and the point is recorded as
Second pixel；Alternatively, as shown in figure 4, scanning by column original graph from right to left along Z-shaped for starting point with D point (or C point)
The point until scanning is more than or equal to the pixel of default gray threshold to first gray value, and is recorded as second by picture
Pixel.
It is alternatively possible to repeatedly along same desired guiding trajectory (such as every time with same starting point, same vertical sweep direction
Mode) the scanning original image, it records first that scanning every time obtains and is greater than or equal to default gray threshold to gray value
Pixel, ask the average value of these pixels to obtain the first pixel or the second pixel, i.e., ask flat by Multiple-Scan
Equal mode finally determines the first pixel or the second pixel, to improve the standard for seeking the first pixel, the second pixel
Exactness.
It is alternatively possible to record scanning every time by scanning the original image along different desired guiding trajectories respectively twice and obtain
First obtained is greater than or equal to the pixel of default gray threshold to gray value, and the average value of these pixels is asked to obtain first
Perhaps the second pixel finally determines the first pixel or second to pixel i.e. in such a way that different scanning track is averaging
Pixel, to improve the accuracy for seeking the first pixel, the second pixel.Such as the first time using A point as starting point, with same perpendicular
Straight scanning direction (positive direction of the y-axis) from left to right scans by column original image and obtains first gray value more than or equal to default ash
Spend the pixel of threshold value；It is from left to right scanned by column using B point as starting point with same vertical sweep direction (negative direction of the y-axis) for the second time
Original image obtains the pixel that first gray value is greater than or equal to default gray threshold；By the seat of the pixel obtained twice
Scale value is averaging, and obtains the first final pixel.
Optionally, before the S102, further includes: receive setting instruction, the default gray threshold is set.
In S103, according to first pixel and second pixel, calculate in the flake imaging picture
The heart.
The first pixel and the second pixel obtained by above method scanning is to be located at circle fisheye picture is imaged
Two o'clock diametrically, therefore seek the line midpoint between the first pixel and the second pixel, circle fisheye can be obtained
The center of circle of picture, the as center (O as shown in Figure 3 of flake imaging picture is imaged1Point).It can be by obtaining the first pixel
And second pixel coordinate value, calculate the centre coordinate value of two coordinate values, obtain the center of flake imaging picture.
In the embodiment of the present invention, by scanning original image, obtains two gray values respectively from both direction and be greater than or wait
In the pixel of default gray threshold, the two pixels are two points on circle fisheye imaging diameter of picture area, calculate this
The center of two points just can obtain the center of flake imaging picture, due to not needing special light source and to software for calculation resolution ratio
It is of less demanding, and by Scanning Detction gray value can accurately obtain circle fisheye be imaged diameter of picture area on two points to
The center of flake imaging picture is obtained, therefore the essence of flake imaging picture Spot detection can be improved in the case where controlling cost
Degree.
Embodiment two:
Fig. 5 shows the process signal of second of flake imaging picture Spot detection method provided by the embodiments of the present application
Figure, details are as follows:
In S501, original image is obtained, wherein the original image is the histogram that picture is imaged comprising circle fisheye
Picture.
S501 is identical as the S101 in a upper embodiment in the present embodiment, referring specifically to the phase of S101 in a upper embodiment
Description is closed, is not repeated herein.
Optionally, before the S501, further includes:
Issue the information that predetermined physical environment is built in prompt.
For guarantee circular flake in original image be imaged the fringe region in picture can in original image
The lower unimaged region of gray value better discriminates between out, and can be come by before image taking, building preset physical environment
The fringe region gray value bordered in flake imaging picture with unimaged region is set to be maintained at higher level.For example, being taken the photograph in flake
As each side placing a blank sheet of paper or paper, the cloth of other light tones etc. vertically in front of mould group, predetermined physical is completed
Environment is built.Before obtaining original image for the first time, the information of predetermined physical environment can be built by issuing prompt, such as
In such a way that screen displaying character or voice play, prompt is issued in flake camera module and each side places a Zhang Bai
The prompt information of paper allows operator according to prompt information, completes building for predetermined physical environment.Optionally, in order to mention
High operator completes to build the accuracy of predetermined physical environment, after issuing prompt and building the information of predetermined physical environment, shows
Show the schematic diagram of predetermined physical environment to be built.
The information for building predetermined physical environment by issuing prompt before obtaining original image, it is ensured that picture is imaged in flake
The gray value for the fringe region bordered in face with unimaged region is maintained at higher level, preferably distinguishes with unimaged region
It opens, to further increase accuracy when determining the first pixel, the second pixel.
In S502, the original image is scanned by desired guiding trajectory, obtains the first pixel and the second pixel, wherein institute
Stating the first pixel is first pixel that the gray value from left to right scanned by column is greater than or equal to default gray threshold
Point, second pixel are first that the gray value scanned by column from right to left is greater than or equal to default gray threshold
Pixel.
Optionally, the original image includes the first vertex positioned at the original image left side, the second vertex and is located at
Third vertex, the 4th vertex on the right of the original image, the step S502 are specifically included:
Using the first vertex of the original image or the second vertex as starting point, the original image is from left to right scanned by column
Obtain the first pixel undetermined that first gray value is greater than or equal to default gray threshold；
Using the described first pixel undetermined as starting point, the first neighbor pixel of predetermined number is from left to right detected, if institute
The gray value for stating the first neighbor pixel of the predetermined number is all larger than or is equal to default gray threshold, it is determined that described first
Pixel undetermined is the first pixel；
Using the third vertex of the original image or the 4th vertex as starting point, the original image is scanned by column from right to left
Obtain the second pixel undetermined that first gray value is greater than or equal to default gray threshold；
Using the described second pixel undetermined as starting point, the second neighbor pixel of predetermined number is detected from right to left, if institute
The gray value for stating the second neighbor pixel of predetermined number is all larger than or is equal to default gray threshold, it is determined that described second is undetermined
Pixel is the second pixel.
By taking situation shown in Fig. 3 as an example, 4 points of A, B, C, D are respectively the first vertex of original image, the second vertex, third
Vertex and the 4th vertex.Using A point or B point as starting point, original image is from left to right scanned by column, it is big to obtain first gray value
In or equal to default gray threshold pixel, which is set as the first pixel undetermined；Then, with the first picture undetermined
Vegetarian refreshments is starting point, the first adjacent picture adjacent with the first pixel undetermined along positive direction of the x-axis detection predetermined number (such as 3)
Vegetarian refreshments, if the gray threshold of these the first neighbor pixels both greater than or is equal to default gray threshold, it is determined that this first to
Determining pixel is the first pixel C1；Otherwise, it is continued to scan on from the described first pixel undetermined, it is big until finding a gray value
In or equal to default gray threshold and the predetermined number pixel of right neighbour gray value also greater than or equal to default gray threshold
Pixel, it is determined as the first pixel.Using C point or D point as starting point, original image is scanned from right to left, obtains first gray scale
Value is more than or equal to the pixel of default gray threshold, which is set as the second pixel undetermined；Then, with second to
Determining pixel is starting point, second neighbor pixel adjacent along negative direction of the x-axis detection predetermined number and the second pixel undetermined,
If the gray threshold of these the second neighbor pixels is both greater than or equal to default gray threshold, it is determined that second pixel undetermined
Point is the second pixel C2；Otherwise, it is continued to scan on from the described second pixel undetermined, is greater than or waits until finding a gray value
In the gray value of default gray threshold and the predetermined number pixel of left neighbour also greater than or equal to default gray threshold pixel,
It is set to the second pixel.
In original image, unimaged region is it is possible that some interference pixel, Huo Zheyou such as white noise
There is light leakage phenomena in camera lens material is bad, the partial region picture that may result in unimaged region is partially bright, by obtaining
It obtains first gray value to be greater than or equal to after the pixel undetermined of default gray threshold, further detection and pixel phase undetermined
The gray value of adjacent predetermined number pixel can further increase to avoid the influence of interference pixel or interference region
The accuracy of the first pixel and the second pixel that arrive, to improve the accuracy of flake imaging picture Spot detection.
In S503, according to first pixel and second pixel, calculate in the flake imaging picture
The heart.
S503 is identical as the S103 in a upper embodiment in the present embodiment, referring specifically to the phase of S103 in a upper embodiment
Description is closed, is not repeated herein.
Optionally, after the step S503, further includes:
Calculate the center of the flake imaging picture and the deviation value at original image center.
If the coordinate value at the center for the flake imaging picture being calculated in S503 is O1(xo1,yo1), and according to rectangle
The coordinate value O at original image center can be calculated in the coordinate value on four vertex of original image2(xo2,yo2).When rectangle
The width of original image be far smaller than original image it is long when (such as differing by more than 50pixel), as shown in fig. 6, due to flake at
As picture diameter close to original image most short side, therefore at this time flake imaging picture center and original image center exist
Deviation on y-axis direction is to influence the key factor of picture imaging effect.In this case, with the center of flake imaging picture
Ordinate yo1It is deviation value with the phase difference of the ordinate yo2 at original image center, i.e. d=| yo1-yo2|.It is original when rectangle
The length of image and wide size be not much different (such as difference within 50pixel) when, as shown in fig. 7, flake imaging picture
The deviation in the direction of the x axis of center and original image center and deviation in the y-axis direction are all likely to become influence picture imaging
The factor of effect, in this case using the distance value at the center of flake imaging picture and original image center as deviation value, i.e.,
The center of flake imaging picture and the deviation value at original image center is obtained by calculation, operator can be allowed to understand
It is corresponding to make to current flake camera module installation situation, that is, imaging sensor and fish-eye relative positional relationship
Adjustment.
Optionally, after the deviation value at the center for calculating the flake imaging picture and original image center, also
Include:
If the deviation value is greater than predetermined deviation value, the information of prompt adjustment camera lens is issued.
By presetting a predetermined deviation value, when deviation value d is greater than predetermined deviation value Δ d, by voice, or
The mode that screen is shown issues the information of prompt adjustment camera lens, operator is prompted to adjust the camera lens installation position of flake camera module
It sets.
When deviation value is larger, shows that the offset of fish eye lens and imaging sensor is larger, influence picture imaging effect, leads to
Sending information is crossed, operator can be reminded to adjust camera lens in time, thus the quality of the original image shot after improving.
Optionally, it if the deviation value is greater than predetermined deviation value, before the information for issuing prompt adjustment camera lens, also wraps
It includes:
According to the resolution ratio and target resolution of the original image, the predetermined deviation value is determined.
Target resolution is the resolution ratio that the effective image of picture is imaged comprising flake, since flake imaging picture is circle
Shape, therefore effective image is generally square, the lateral resolution of target resolution is equal with longitudinal resolution.As shown in fig. 6,
For the original image of resolution ratio 2048 × 1536, generally make the diameter of flake imaging picture close to the short side of original image
1536pixel, and in order to eliminate the useless projection of camera lens inner wall, to camera lens installation deflection, there are certain surpluses, can generally allow
Target resolution is slightly less than the short side of original image, such as is set to 1440 × 1440.
When the width of the original image of rectangle be far smaller than original image it is long when (such as differing by more than 50pixel), when, such as
Shown in Fig. 6, the center of the picture of flake imaging at this time and the deviation of original image center in the y-axis direction are to influence picture imaging effect
The key factor of fruit, deviation value d=| yo1-yo2|, picture center and original image center is imaged in the y-axis direction in flake at this time
The maximum offset of permission is predetermined deviation value.If the resolution ratio of original image is 2048 × 1536, target resolution is
1440 × 1440, and the maximum offset that flake imaging picture center and original image center allow in the y-axis direction are as follows:
(1536-1440)/2=48pixel, i.e., predetermined deviation value Δ d at this time are 48pixel.
When the length of the original image of rectangle and wide size are not much different (such as difference is within 50pixel), as shown in fig. 7,
Deviation value at this timeFlake imaging picture center and original image center allow most at this time
Big distance value is predetermined deviation value.If the resolution ratio of original image be 1540 × 1536, target resolution be 1440 × 1440, flake at
The maximum range value allowed as picture center and original image center are as follows:I.e. this
When predetermined deviation value Δ d be 69pixel.
In S504, center and the target resolution of picture are imaged according to the flake, cuts the original image, completes
Picture cent(e)ring is imaged in flake.
Target resolution is the resolution ratio that the effective image (referred to herein as target image) of picture is imaged comprising flake, due to
It is circle that picture, which is imaged, in flake, therefore target image is generally square, the lateral resolution and longitudinal resolution of target resolution
Rate is equal.As shown in figure 8, setting the resolution ratio of original image as 2048 × 1536, generally make the diameter of flake imaging picture close
The short side 1536pixel of original image, and in order to eliminate the useless projection of camera lens inner wall, and there are certain to camera lens installation deflection
Surplus, can generally allow target resolution to be slightly less than the short side of original image, such as be set to 1440 × 1440.
As shown in figure 8, the center O of picture is imaged according to flake1(xo1,yo1), target resolution 1440 × 1440, with O1For
Center cuts original image using target resolution as the size of target image, obtain flake imaging picture be maximized it is aobvious
Show and unimaged region is maximized the target image of rejecting, completes flake and picture cent(e)ring is imaged.
In the embodiment of the present invention, after the center for detecting flake imaging picture, the center of picture is imaged according to flake
Original image is cut with target resolution, deletes most of invalid imaging region, obtains that flake imaging picture can be made by most
The target image that bigization is presented effectively improves final image and effect is presented.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present invention constitutes any limit
It is fixed.
Embodiment three:
Fig. 9 shows a kind of structural schematic diagram of flake imaging picture central detection device provided by the embodiments of the present application,
For ease of description, part relevant to the embodiment of the present application is illustrated only:
It includes: acquiring unit 91, scanning element 92, the first computing unit 93 that picture central detection device, which is imaged, in the flake.
Wherein:
Acquiring unit 91, for obtaining original image, wherein the original image is that picture is imaged comprising circle fisheye
Rectangular image.
Image taking is carried out by the flake camera module being made of imaging sensor and fish eye lens, obtains original graph
Picture.Original image is rectangular image, which contains circular flake imaging picture, is illustrated in figure 2 a kind of original
The exemplary diagram of image.The actual photographed imaging region of original image is fallen in circular flake imaging picture, and the flake is imaged
The usual gray value of picture is higher, i.e., the scene usually shot is not black or more gloomy scene；And other regions are
The inactive area of black, is known as unimaged region for the inactive area here, and usual flake is imaged in the border circular areas of picture
Gray value is higher than unimaged region.
Optionally, picture central detection device is imaged in the flake further include:
First prompt unit builds the information of predetermined physical environment for issuing prompt.
Scanning element 92, for scanning the original image, the first pixel of acquisition and the second pixel by desired guiding trajectory,
Wherein first pixel is that the gray value from left to right scanned by column is greater than or equal to the first of default gray threshold
A pixel, second pixel are that the gray value scanned by column from right to left is greater than or equal to default gray threshold
First pixel.
As shown in figure 3, it using A point as coordinate origin is x with the direction AD that four vertex of original image, which are respectively A, B, C, D,
Axis positive direction establishes reference axis by y-axis direction of the direction AB, wherein positive direction of the x-axis is direction from left to right, x-axis losing side
To direction as from right to left.
Original image is scanned according to desired guiding trajectory, from left to right scans by column the gray value detected on the original image,
First pixel that obtained gray value is greater than or equal to default gray threshold is the first pixel (C i.e. as shown in Figure 31
Point).Such as using A point as starting point, the gray value on positive direction of the y-axis Scanning Detction original image completes first row up to B point
Scanning；Then to be located at ash of the neighbor pixel on the right of A point as starting point, on positive direction of the y-axis Scanning Detction original image
Angle value completes the second column scan until the point on the contact side BC；And so on, every time be located at the side AD on and and previous column
The point for scanning the right neighbour of starting point is starting point, the gray value on positive direction of the y-axis vertical sweep detection original image, until being located at BC
Until point on side, i.e., original image is scanned by column from left to right with same vertical sweep direction (positive direction of the y-axis), until scanning
It is more than or equal to the pixel of default gray threshold to first gray value, and the point is recorded as the first pixel.Alternatively,
(as shown in Figure 4) using A point as starting point, the gray value on positive direction of the y-axis Scanning Detction original image completes first up to B point
Column scan；Then to be located at the neighbor pixel on the right of B point as starting point, along negative direction of the y-axis Scanning Detction original image
Gray value, until the point position on the contact side AD, completes the second column scan；And so on, every time with right with previous column sweep stopping point
Adjacent point is starting point, the gray value in the positive direction of y-axis or negative direction vertical sweep detection original image, i.e., along Z-shaped
Type from left to right scans by column original image, until scanning is more than or equal to the picture of default gray threshold to first gray value
Vegetarian refreshments, and the point is recorded as the first pixel.
It should be understood that original can also from left to right be scanned by column with same vertical sweep direction (negative direction of the y-axis) using B point as starting point
Beginning image, or original image is from left to right scanned by column along Z-shaped using B point as starting point, it is greater than or waits to obtains gray value
In first pixel of default gray threshold, i.e. the first pixel.
Similarly, original image is scanned according to desired guiding trajectory, is scanned by column on the detection original image from right to left
Gray value, first pixel that obtained gray value is greater than or equal to default gray threshold is the second pixel (i.e. such as Fig. 3 institute
The C shown2Point).As shown in figure 3, scanning by column original from right to left for starting point with D point (or C point) with same vertical sweep direction
Beginning image until scanning is more than or equal to the pixel of default gray threshold to first gray value, and the point is recorded as
Second pixel；Alternatively, as shown in figure 4, scanning by column original graph from right to left along Z-shaped for starting point with D point (or C point)
The point until scanning is more than or equal to the pixel of default gray threshold to first gray value, and is recorded as second by picture
Pixel.
Optionally, the original image includes the first vertex, the second vertex, third vertex and the 4th vertex, wherein first
Vertex and the second vertex are located at the left side of the original image, and third vertex and the 4th vertex are located at the right of image, described to sweep
Retouching unit 92 includes the first determining module and the second determining module:
First determining module, for using the first vertex of the original image or the second vertex as starting point, from a left side to
The right side scans by column the original image and obtains the first pixel undetermined that first gray value is greater than or equal to default gray threshold；
Using the described first pixel undetermined as starting point, the first neighbor pixel of predetermined number is from left to right detected, if described default
The gray value of the first several neighbor pixels is all larger than or is equal to default gray threshold, it is determined that first pixel undetermined is
First pixel.
Second determining module, for using the third vertex of the original image or the 4th vertex as starting point, from the right side to
A left side scans by column the original image and obtains the second pixel undetermined that first gray value is greater than or equal to default gray threshold；
Using the described second pixel undetermined as starting point, the second neighbor pixel of predetermined number is detected from right to left, if described default
The gray value of the second several neighbor pixels is all larger than or is equal to default gray threshold, it is determined that second pixel undetermined is
Second pixel.
First computing unit 93, for according to first pixel and second pixel, calculate the flake at
As the center of picture.
First computing unit obtains the coordinate value of the first pixel and the second pixel, and the center for calculating two coordinate values is sat
Scale value obtains the center of the flake imaging picture.
Optionally, picture central detection device is imaged in the flake further include:
Second computing unit, for calculating the center of the flake imaging picture and the deviation value at original image center.
Optionally, picture central detection device is imaged in the flake further include:
Second prompt unit issues the information of prompt adjustment camera lens if being greater than predetermined deviation value for the deviation value.
Optionally, picture central detection device is imaged in the flake further include:
Predetermined deviation value determination unit, for the resolution ratio and target resolution according to the original image, determine described in
Predetermined deviation value.
Optionally, picture central detection device is imaged in the flake further include:
Correct unit, for according to the flake be imaged picture center and target resolution, cut the original image,
It completes flake and picture cent(e)ring is imaged.
In the embodiment of the present invention, by scanning original image, obtains two gray values respectively from both direction and be greater than or wait
In the pixel of default gray threshold, the two pixels are two points on circle fisheye imaging diameter of picture area, calculate this
The center of two points just can obtain the center of flake imaging picture, due to not needing special light source and differentiating to computer software
Rate is of less demanding, and by Scanning Detction gray value can accurately obtain circle fisheye be imaged diameter of picture area on two points from
And the center of flake imaging picture is obtained, therefore flake imaging picture Spot detection can be improved in the case where controlling cost
Precision.
Example IV:
Figure 10 is the schematic diagram for the terminal device that one embodiment of the invention provides.As shown in Figure 10, the terminal of the embodiment
Equipment 10 includes: processor 100, memory 101 and is stored in the memory 101 and can be on the processor 100
Picture Spot detection program is imaged in the computer program 102 of operation, such as flake.The processor 100 executes the computer
The step in above-mentioned each flake imaging picture Spot detection embodiment of the method, such as step shown in FIG. 1 are realized when program 102
S101 to S103.Alternatively, the processor 100 is realized in above-mentioned each Installation practice respectively when executing the computer program 102
Module/unit function, such as the function of module 91 to 93 shown in Fig. 9.
Illustratively, the computer program 102 can be divided into one or more module/units, it is one or
Multiple module/the units of person are stored in the memory 101, and are executed by the processor 100, to complete the present invention.Institute
Stating one or more module/units can be the series of computation machine program instruction section that can complete specific function, the instruction segment
For describing implementation procedure of the computer program 102 in the terminal device 10.For example, the computer program 102
Acquiring unit, scanning element, the first computing unit can be divided into, each unit concrete function is as follows:
Acquiring unit, for obtaining original image, wherein the original image is the square that picture is imaged comprising circle fisheye
Shape image.
Scanning element, for scanning the original image, the first pixel of acquisition and the second pixel by desired guiding trajectory,
Described in the first pixel be that the gray value that from left to right scans by column is greater than or equal to default gray threshold first
Pixel, second pixel are that the gray value that scans by column from right to left is greater than or equal to the of default gray threshold
One pixel.
First computing unit, for calculating the flake imaging according to first pixel and second pixel
The center of picture.
The terminal device 10 can be the calculating such as desktop PC, notebook, palm PC and cloud server and set
It is standby.The terminal device may include, but be not limited only to, processor 100, memory 101.It will be understood by those skilled in the art that
Figure 10 is only the example of terminal device 10, does not constitute the restriction to terminal device 10, may include more or more than illustrating
Few component perhaps combines certain components or different components, such as the terminal device can also be set including input and output
Standby, network access equipment, bus etc..
Alleged processor 100 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 101 can be the internal storage unit of the terminal device 10, such as the hard disk of terminal device 10
Or memory.The memory 101 is also possible to the External memory equipment of the terminal device 10, such as on the terminal device 10
The plug-in type hard disk of outfit, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD)
Card, flash card (Flash Card) etc..Further, the memory 101 can also be both interior including the terminal device 10
Portion's storage unit also includes External memory equipment.The memory 101 is for storing the computer program and the terminal
Other programs and data needed for equipment.The memory 101, which can be also used for temporarily storing, have been exported or will be defeated
Data out.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method, it can be with
It realizes by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of logical function partition, there may be another division manner in actual implementation, such as
Multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be through some interfaces, device
Or the INDIRECT COUPLING or communication connection of unit, it can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
It may include: any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic that can carry the computer program code
Dish, CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium includes can carry out increasing appropriate according to the requirement made laws in jurisdiction with patent practice
Subtract, such as does not include electric carrier signal and electricity according to legislation and patent practice, computer-readable medium in certain jurisdictions
Believe signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. picture Spot detection method is imaged in a kind of flake characterized by comprising
Obtain original image, wherein the original image is the rectangular image that picture is imaged comprising circle fisheye；
The original image is scanned by desired guiding trajectory, the first pixel and the second pixel are obtained, wherein first pixel
Gray value from left to right to scan by column is greater than or equal to first pixel of default gray threshold, second picture
Vegetarian refreshments is first pixel that the gray value scanned by column from right to left is greater than or equal to default gray threshold；
According to first pixel and second pixel, the center of the flake imaging picture is calculated.
2. picture Spot detection method is imaged in flake as described in claim 1, which is characterized in that in the acquisition original image
Before, further includes:
Issue the information that predetermined physical environment is built in prompt.
3. picture Spot detection method is imaged in flake as described in claim 1, which is characterized in that the original image includes position
In first vertex on the original image left side, the second vertex and third vertex, the 4th top on the right of the original image
Point, it is described to scan the original image by desired guiding trajectory, obtain the first pixel and the second pixel, comprising:
Using the first vertex of the original image or the second vertex as starting point, from left to right scans by column the original image and obtain
First gray value is greater than or equal to the first pixel undetermined of default gray threshold；
Using the described first pixel undetermined as starting point, the first neighbor pixel of predetermined number is from left to right detected, if described pre-
If the gray value of the first neighbor pixel of number is all larger than or is equal to default gray threshold, it is determined that first pixel undetermined
Point is the first pixel；
Using the third vertex of the original image or the 4th vertex as starting point, the original image is scanned by column from right to left and is obtained
First gray value is greater than or equal to the second pixel undetermined of default gray threshold；
Using the described second pixel undetermined as starting point, the second neighbor pixel of predetermined number is detected from right to left, if described pre-
If the gray value of the second neighbor pixel of number is all larger than or is equal to default gray threshold, it is determined that second pixel undetermined
Point is the second pixel.
4. picture Spot detection method is imaged in flake as described in claim 1, which is characterized in that described according to described first
Pixel and second pixel calculate the flake and are imaged after the center of picture, further includes:
Calculate the center of the flake imaging picture and the deviation value at original image center.
5. picture Spot detection method is imaged in flake as claimed in claim 4, which is characterized in that calculate the flake described
It is imaged after the center of picture and the deviation value at original image center, further includes:
If the deviation value is greater than predetermined deviation value, the information of prompt adjustment camera lens is issued.
6. picture Spot detection method is imaged in flake as claimed in claim 5, which is characterized in that if in the deviation value
Greater than predetermined deviation value, then before the information for issuing prompt adjustment camera lens, further includes:
According to the resolution ratio and target resolution of the original image, the predetermined deviation value is determined.
7. picture Spot detection method is imaged in the flake as described in Claims 1-4 any one, which is characterized in that the side
Method further include:
Center and the target resolution of picture are imaged according to the flake, cuts the original image, completes flake and picture is imaged
Cent(e)ring.
8. picture central detection device is imaged in a kind of flake characterized by comprising
Acquiring unit, for obtaining original image, wherein the original image is the histogram that picture is imaged comprising circle fisheye
Picture；
Scanning element obtains the first pixel and the second pixel, wherein institute for scanning the original image by desired guiding trajectory
Stating the first pixel is first pixel that the gray value from left to right scanned by column is greater than or equal to default gray threshold
Point, second pixel are first that the gray value scanned by column from right to left is greater than or equal to default gray threshold
Pixel；
First computing unit, for calculating the flake imaging picture according to first pixel and second pixel
Center.
9. a kind of terminal device, including memory, processor and storage are in the memory and can be on the processor
The computer program of operation, which is characterized in that the processor realizes such as claim 1 to 7 when executing the computer program
The step of any one the method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claim 1 to 7 of realization the method.
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| CN201910104677.2A CN109801213A (en) | 2019-02-01 | 2019-02-01 | Picture Spot detection method, apparatus and terminal device is imaged in flake |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910104677.2A CN109801213A (en) | 2019-02-01 | 2019-02-01 | Picture Spot detection method, apparatus and terminal device is imaged in flake |
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