CN109242807A - Rendering parameter adaptive edge softening method, medium and computer equipment - Google Patents
Rendering parameter adaptive edge softening method, medium and computer equipment Download PDFInfo
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Abstract
The invention discloses a kind of edge softening method, medium and computer equipments that rendering parameter is adaptive, including obtain original image, and carry out FIG pull handle to original image to obtain foreground image；The edge pixel point of foreground image is obtained, and chain encoding processing is carried out to obtain edge point sequence to edge pixel；The edge line of foreground image is split into a plurality of smooth paragraph according to edge point sequence；The gradient value of each edge pixel point on every smooth paragraph is calculated, and every corresponding average gradient value of smooth paragraph is calculated according to the gradient value of each edge pixel point on every smooth paragraph；The softening range of every smooth paragraph is obtained, according to every corresponding average gradient value of smooth paragraph so that the edge to foreground image softens；It can be realized and carry out the selection of joining place emergence value automatically according to display foreground and background, and it is possible to the selection of different emergence values be carried out according to different local edge situations, so that the emergence processing for image is more lively.
Description
Technical field
The present invention relates to technical field of image processing, in particular to a kind of edge softening method that rendering parameter is adaptive,
Medium and computer equipment.
Background technique
Image emergence processing technique is blurred by being connected part with background to display foreground, to constitute a kind of gradual change
Visual effect, to achieve the effect that display foreground and background natural sparse model.
In existing image emergence processing technique, the setting of emergence value is mostly carried out by experience by professional, and
Determine that emergence value carries out the uniform length virtualization of the prospect overall situation later；This mode needs artificially to judge emergence value, on
Hand difficulty is larger, also, can not carry out the adaptive of different virtualization ranges from the different situations of background edge according to prospect, so that
Feather effect is more stiff.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
One purpose is to propose a kind of edge softening method that rendering parameter is adaptive, can be realized automatically according to display foreground and back
Scape carries out the selection of joining place emergence value, and it is possible to the selection of different emergence values is carried out according to different local edge situations,
So that the emergence processing for image is more lively.
Second object of the present invention is to propose a kind of computer readable storage medium.
Third object of the present invention is to propose a kind of computer equipment.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of edge that rendering parameter is adaptive softening
Method, comprising the following steps: obtain original image, and FIG pull handle is carried out to obtain foreground image to the original image；It obtains
The edge pixel point of the foreground image is taken, and chain encoding processing is carried out to obtain edge point sequence to the edge pixel point；
The edge line of the foreground image is split into a plurality of smooth paragraph according to the edge point sequence；It calculates on every smooth paragraph
The gradient value of each edge pixel point, and every is calculated smoothly according to the gradient value of each edge pixel point on every smooth paragraph
The corresponding average gradient value of paragraph；The softening model of every smooth paragraph is obtained according to every corresponding average gradient value of smooth paragraph
It encloses, so that the edge to the foreground image softens, wherein the average gradient value is inversely proportional with the softening range.
The adaptive edge softening method of rendering parameter according to an embodiment of the present invention, firstly, original image is obtained, and
It gets original image and FIG pull handle is carried out to obtain foreground image to original image later；Then, the side of foreground image is obtained
Edge pixel, and chain encoding processing is carried out to obtain edge point sequence to edge pixel；Then, according to edge point sequence will before
The edge line of scape image splits into a plurality of smooth paragraph；Then, the gradient of each edge pixel point on every smooth paragraph is calculated
Value, and every corresponding average gradient of smooth paragraph is calculated according to the gradient value of each edge pixel point on every smooth paragraph
Value；Then, the softening range of every smooth paragraph is obtained, according to every corresponding average gradient value of smooth paragraph so as to prospect
The edge of image is softened, wherein average gradient value is inversely proportional with softening range；To realizing automatically according to display foreground and
Background carries out the selection of joining place emergence value, and it is possible to carry out the choosing of different emergence values according to different local edge situations
It takes, so that the emergence processing for image is more lively.
In addition, the adaptive edge softening method of the rendering parameter proposed according to that above embodiment of the present invention can also have
Following additional technical characteristic:
Optionally, chain encoding processing is carried out to the edge pixel point using Freeman compiling method.
Optionally, the edge line of the foreground image is split by a plurality of smooth paragraph according to the edge point sequence, wrapped
Include: handle along the edge point sequence sliding using preset unit window, and using smoothness more than preset value window as
The cut-point of different smooth paragraphs, splits into a plurality of smooth paragraph for the edge line of the foreground image.
Optionally, also pass through Hough transformation before the gradient value of each edge pixel point on calculating every smooth paragraph
By the marginal point sequence fit of every smooth paragraph at Bezier.
Optionally, the expression formula of the Bezier are as follows:
B (t)=(1-t)2P0+2t(1-t)P1+t2P2,t∈[0,1]
Wherein, P0And P2Two endpoints of respectively every smooth paragraph, P1For the control point of Bezier, and control
The design parameter of point can be acquired by Hough transformation.
Optionally, the gradient value is calculated according to following steps: centered on edge pixel point, obtaining respectively laterally
Color difference and longitudinal chromatic aberration；Evolution is carried out to obtain the gradient value to the quadratic sum of the lateral chromatic aberration and the longitudinal chromatic aberration.
Optionally, the edge of the foreground image is softened, comprising: the foreground image is subjected to N times of oversubscription,
In, N is the positive integer greater than 1；Corresponding softening length is obtained according to the softening range of every smooth paragraph, and according to each side
Softening length corresponding to edge pixel, the normal direction along each edge pixel point carries out coordinate migration outward, to carry out side
Edge expansion, wherein when carrying out edge swell, formed on N times of oversubscription figure according to the new edge that expansion generates based on transparency
Circle of equal altitudes；The N times of oversubscription figure is compressed according to the original size of the foreground image, and is obtained according to the circle of equal altitudes
The transparency mean value on the N times of oversubscription figure in each N*N window is taken, and using the transparency mean value as phase after compression
Answer the transparency of new coordinate points.
Optionally, coordinate migration is carried out according to the following formula:
X2=X1+cos θ * r,
Y2=Y1+sin θ * r,
Wherein, (X1, Y1) is the coordinate of each edge pixel point, and (X2, Y2) is the coordinate after migration, and r is softening length,
θ is normal orientation.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of computer readable storage medium, thereon
It is stored with the adaptive edge softening program of rendering parameter, the adaptive edge softening program of the rendering parameter is executed by processor
The adaptive edge softening method of Shi Shixian for example above-mentioned rendering parameter.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of computer equipment, including memory, place
The computer program managing device and storage on a memory and can running on a processor, which is characterized in that the processor executes
When described program, as adaptive edge softening method such as above-mentioned rendering parameter is realized.
Detailed description of the invention
Fig. 1 is the flow diagram according to the adaptive edge softening method of the rendering parameter of the embodiment of the present invention；
Fig. 2 is the flow diagram according to the adaptive edge softening method of the rendering parameter of another embodiment of the present invention；
Fig. 3 is the flow diagram according to the foreground image edge softening method of the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In existing image emergence processing technique, professional is needed rule of thumb to carry out the setting of emergence value, upper hand
Difficulty is big, and emergence processing can only carry out the virtualization of unified Feather Radius to the prospect overall situation, can not be according to foreground and background edge
Different situations carry out the selection of virtualization range, feather effect is stiff；Rendering parameter according to an embodiment of the present invention is adaptive
Edge softening method, firstly, obtain original image, and after getting original image to original image carry out FIG pull handle with
Obtain foreground image；Then, the edge pixel point of foreground image is obtained, and chain encoding processing is carried out to obtain to edge pixel
Edge point sequence；Then, the edge line of foreground image is split by a plurality of smooth paragraph according to edge point sequence；Then, it calculates
The gradient value of each edge pixel point on every smooth paragraph, and according to the gradient of each edge pixel point on every smooth paragraph
Value calculates every corresponding average gradient value of smooth paragraph；Then, it is obtained according to the corresponding average gradient value of every smooth paragraph
The softening range of every smooth paragraph, so that the edge to foreground image softens, wherein average gradient value and softening range
It is inversely proportional；To realize the selection for carrying out joining place emergence value automatically according to display foreground and background, and it is possible to according to difference
Local edge situation carry out the selections of different emergence values so that the emergence processing for image is more lively.
In order to better understand the above technical scheme, the exemplary reality that the present invention will be described in more detail below with reference to accompanying drawings
Apply example.Although showing exemplary embodiment of the present invention in attached drawing, it being understood, however, that may be realized in various forms this hair
It is bright and should not be limited by the embodiments set forth herein.It is to be able to thoroughly understand this on the contrary, providing these embodiments
Invention, and the scope of the present invention can be fully disclosed to those skilled in the art.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Fig. 1 is the flow diagram according to the adaptive edge softening method of the rendering parameter of the embodiment of the present invention, such as Fig. 1
It is shown, the adaptive edge softening method of the rendering parameter the following steps are included:
S101 obtains original image, and carries out FIG pull handle to original image to obtain foreground image.
That is, FIG pull handle is carried out to original image, after getting original image to be processed to obtain original
Foreground image in beginning image.
Wherein, FIG pull handle is carried out to original image to obtain the method for foreground image and have in the prior art in detail
Description, this will not be repeated here.
S102 obtains the edge pixel point of foreground image, and carries out chain encoding processing to edge pixel to obtain edge
Point sequence.
That is, further obtaining the edge in foreground image after getting the foreground image in original image
Pixel, and the edge pixel point is subjected to chain encoding, to obtain edge point sequence.
Wherein, there are many modes that chain encoding is carried out to edge pixel, for example, passing through 4 connection chain codes.
As an example, chain encoding processing is carried out to edge pixel using Freeman compiling method, specifically, used
Edge pixel point is carried out chain encoding by eight directional Freeman compiling method, by all pixels positioned at marginal position, by the inverse time
The sequence of needle is arranged in orderly track.
The edge line of foreground image is split into a plurality of smooth paragraph according to edge point sequence by S103.
That is, the edge line of foreground image is carried out according to edge point sequence after getting edge point sequence
It splits, to form a plurality of smooth paragraph.
As an example, sliding processing is carried out along edge point sequence using the unit window of default specification, and will be smooth
Degree is more than cut-point of the window of preset value as different smooth paragraphs, the edge line of foreground image is split into a plurality of smooth
Paragraph；In other words, it is slided with unit window along the edge point sequence of ranked completion, and edge in real-time judge window
Whether the turnover of point sequence is more than threshold value, and when the judgment result is yes by the window indicia be smooth paragraph cut-point；So
Afterwards, smooth paragraph is determined according to these cut-points.
S104 calculates the gradient value of each edge pixel point on every smooth paragraph, and according to every on every smooth paragraph
The gradient value of a edge pixel point calculates every corresponding average gradient value of smooth paragraph.
S105 obtains the softening range of every smooth paragraph according to every corresponding average gradient value of smooth paragraph, so as to
The edge of foreground image is softened.
Wherein, average gradient value is inversely proportional with softening range, that is to say, that when average gradient value is bigger, the average ladder
The softening range of the corresponding smooth paragraph of angle value is smaller, conversely, average gradient value gets over hour, the average gradient value is corresponding smooth
The softening range of paragraph is bigger；In this way, according to average gradient value to foreground image and background image color difference is smaller or even no color differnece
Smooth section drop into row sofening treatment, meanwhile, retain foreground picture in foreground image and the biggish smooth paragraph of background image color difference
As original edge hardness, thus adaptively according to the corresponding side of color difference progress between foreground image and background image
Edge processing, so that treated, final image is more natural.
That is, obtaining each edge by gradient operator along each edge pixel point on every smooth paragraph
Then the gradient value of pixel it is corresponding to carry out every smooth paragraph according to the gradient value of each edge pixel point got
The calculating of average gradient value；And every corresponding softening range of smooth paragraph is determined according to the average gradient value being calculated, with
And according to every corresponding softening range of smooth paragraph to prospect roll into a ball to edge carry out sofening treatment, with obtain according to prospect with
The different situations of background carry out the final image of adaptability softening.
In conclusion the edge softening method that rendering parameter according to an embodiment of the present invention is adaptive, firstly, obtaining original
Image, and FIG pull handle is carried out to obtain foreground image to original image after getting original image；Then, prospect is obtained
The edge pixel point of image, and chain encoding processing is carried out to obtain edge point sequence to edge pixel；Then, according to marginal point
The edge line of foreground image is split into a plurality of smooth paragraph by sequence；Then, each edge pixel on every smooth paragraph is calculated
Point gradient value, and according to the gradient value of each edge pixel point on every smooth paragraph calculate every smooth paragraph it is corresponding put down
Equal gradient value；Then, the softening range of every smooth paragraph is obtained according to every corresponding average gradient value of smooth paragraph, so as to
The edge of foreground image is softened, wherein average gradient value is inversely proportional with softening range；To realize automatically according to image
Foreground and background carries out the selection of joining place emergence value, and it is possible to carry out different emergence according to different local edge situations
The selection of value, so that the emergence processing for image is more lively.
Fig. 2 is the flow diagram according to the adaptive edge softening method of the rendering parameter of another embodiment of the present invention,
As shown in Fig. 2, the adaptive edge softening method of the rendering parameter the following steps are included:
S201 obtains original image, and carries out FIG pull handle to original image to obtain foreground image.
S202 obtains the edge pixel point of foreground image, and carries out chain encoding processing to edge pixel to obtain edge
Point sequence.
S203 is handled along edge point sequence sliding using preset unit window, and is more than the window of preset value by smoothness
Cut-point of the mouth as different smooth paragraphs, splits into a plurality of smooth paragraph for the edge line of foreground image.
That is, being slided with unit window along the edge point sequence of ranked completion, and real-time judge window
Whether the turnover of edge point sequence is more than threshold value in mouthful, and by the window indicia is when the judgment result is yes that smooth paragraph divides
Cutpoint；Then, smooth paragraph is determined according to these cut-points.
S204, by Hough transformation by the marginal point sequence fit of every smooth paragraph at Bezier.
That is, the edge point sequence of every smooth paragraph is fitted, after getting smooth paragraph with life
At Bezier.
As an example, using the sequence between two cut-points as a smooth paragraph, every smooth section is dropped into
Row Hough transformation, by the marginal point sequence fit of ordered cascade to closest second order Bezier；Wherein, Bezier
Curve representation formula is as follows:
B (t)=(1-t)2P0+2t(1-t)P1+t2P2,t∈[0,1]
Wherein, P0And P2Two endpoints of respectively every smooth paragraph, P1For the control point of Bezier, and according to
Hough transformation and ballot determine；That is, the position at control point be it is unknown, need to establish P by Hough transformation1Coordinate
Ballot device, and the highest P of concentration degree of voting1Coordinate position be exactly P that Hough transformation obtains1Coordinate calculated result.
S205 obtains lateral chromatic aberration and longitudinal chromatic aberration centered on edge pixel point respectively.
S206 carries out evolution to the quadratic sum of lateral chromatic aberration and longitudinal chromatic aberration to obtain gradient value.
That is, centered on edge pixel point, obtaining edge pixel point respectively in the calculating process of gradient value
Then lateral chromatic aberration and longitudinal chromatic aberration carry out evolution to the quadratic sum of the lateral chromatic aberration and longitudinal chromatic aberration got to obtain pair
Answer the gradient value of edge pixel point.
It is corresponding flat to calculate every smooth paragraph according to the gradient value of each edge pixel point on every smooth paragraph by S207
Equal gradient value.
S208 obtains the softening range of every smooth paragraph according to every corresponding average gradient value of smooth paragraph, so as to
The edge of foreground image is softened.
As an example, lateral chromatic aberration is obtained respectively centered on each edge pixel point along every smooth paragraph
Fx and longitudinal chromatic aberration Fy, gradient value are that the quadratic sum of lateral chromatic aberration Fx and longitudinal chromatic aberration Fy carries out the result of evolution again；Gradient
After value calculates completion, the meter of average gradient value is carried out according to the gradient value of each edge pixel point on every smooth paragraph
It calculates, to obtain every corresponding average gradient value of smooth paragraph；Then, it is obtained according to every corresponding average gradient value of smooth paragraph
The softening range of every smooth paragraph is taken, and is softened according to edge of the softening range to foreground image；Wherein, gradient value
Smaller, softening range is bigger.
It should be noted that the description of the above-mentioned edge softening method adaptive about rendering parameter in Fig. 1 is equally applicable
The adaptive edge softening method of rendering parameter in the embodiment；This will not be repeated here.
In conclusion the edge softening method that rendering parameter according to an embodiment of the present invention is adaptive, firstly, obtaining original
Image, and FIG pull handle is carried out to obtain foreground image to original image；Then, the edge pixel point of foreground image is obtained, and
Chain encoding processing is carried out to obtain edge point sequence to edge pixel；Then, using preset unit window along marginal point sequence
Column sliding processing, and using smoothness be more than preset value window as the cut-point of different smoothly paragraphs, by foreground image
Edge line splits into a plurality of smooth paragraph；Then, by Hough transformation by the marginal point sequence fit of every smooth paragraph at shellfish
Sai Er curve；Then, centered on edge pixel point, lateral chromatic aberration and longitudinal chromatic aberration are obtained respectively, and to lateral chromatic aberration and indulge
Evolution is carried out to the quadratic sum of color difference to obtain gradient value；And the gradient according to each edge pixel point on every smooth paragraph
Value calculates every corresponding average gradient value of smooth paragraph；Then, it is obtained according to the corresponding average gradient value of every smooth paragraph
The softening range of every smooth paragraph, so that the edge to foreground image softens；To realize automatically according to display foreground
The selection that joining place emergence value is carried out with background, and it is possible to carry out different emergence values according to different local edge situations
It chooses, so that the emergence processing for image is more lively.
In some embodiments, as shown in figure 3, the adaptive edge softening side of rendering parameter that the embodiment of the present invention proposes
In method, the mode that softened to the edge of foreground image specifically includes the following steps:
Foreground image is carried out N times of oversubscription by S301.
Wherein, N is the positive integer greater than 1.
As an example, foreground image is subjected to 10 times of oversubscription.
S302 obtains corresponding softening length according to the softening range of every smooth paragraph, and according to each edge pixel
The corresponding softening length of point, carries out coordinate migration along the normal direction of each edge pixel point outward, to carry out edge swell,
Wherein, it when carrying out edge swell, is formed on N times of oversubscription figure based on the contour of transparency according to the new edge that expansion generates
Figure.
That is, obtaining corresponding softening length according to the softening range of every smooth paragraph, wherein the softening length
Softening length for each edge pixel point for including in every smooth paragraph；Then, according to corresponding to each edge pixel point
Softening length, the normal direction along each edge pixel point carries out coordinate migration outward, to carry out edge swell, wherein
While edge swell, transparency declines step by step, is formed on N times of oversubscription figure with the new edge generated according to expansion based on transparent
The circle of equal altitudes of degree.
As an example, coordinate of each edge pixel point before migration is (X1, Y1)；Softening length is r, normal
Direction is θ；The coordinate of each edge pixel point after migration is (X2, Y2)；Then each edge pixel point is according to the following formula
Carry out coordinate migration:
X2=X1+cos θ * r,
Y2=Y1+sin θ * r,
S303 compresses N times of oversubscription figure according to the original size of foreground image, and obtains N times according to circle of equal altitudes and surpass
Transparency mean value on component in each N*N window, and using transparency mean value as the saturating of new coordinate points corresponding after compression
Lightness.
That is, in the coordinate migration for carrying out each edge pixel point, and according to the new edge generated after expansion at N times
It is formed after the circle of equal altitudes based on transparency on oversubscription figure, N times of oversubscription figure is compressed according to the original size of foreground image,
The oversubscription figure that 10 times are amplified is re-compressed original size, wherein carried out with the transparency in N*N window specification transparent
The calculating of mean value is spent, and using the mean value as the transparency of corresponding new coordinate points.
As an example, after carrying out 10 times of oversubscription to foreground image, each edge pixel point is migrated, and
A circle of equal altitudes based on transparency is formed on 10 times of oversubscription figures according to the new edge that edge swell generates；Then, by 10 times
The oversubscription figure of amplification is compressed, to compress the original size of meeting；Wherein, in terms of every 10*10 window progress transparency mean value
Calculate, using the transparency mean value as the corresponding compression of 10*10 window after pixel transparency value.
In conclusion the softening mode of the adaptive edge softening method of rendering parameter according to an embodiment of the present invention, first
First, foreground image is subjected to N times of oversubscription；Then, corresponding softening length is obtained according to the softening range of every smooth paragraph, and
According to softening length corresponding to each edge pixel point, coordinate is carried out outward along the normal direction of each edge pixel point and is moved
It moves, to carry out edge swell, wherein when carrying out edge swell, formed on N times of oversubscription figure according to the new edge that expansion generates
Circle of equal altitudes based on transparency；Then, N times of oversubscription figure is compressed according to the original size of foreground image, and according to contour
Figure obtains the transparency mean value on N times of oversubscription figure in each N*N window, and using transparency mean value as corresponding new after compression
The transparency of coordinate points；So that the edge of the image after edge sofening treatment is more natural, mellow and full, edge is improved
The visual effect of image after sofening treatment.
In order to realize above-described embodiment, the embodiment of the present invention also proposed a kind of computer readable storage medium, deposit thereon
The adaptive edge softening program of rendering parameter is contained, when the adaptive edge softening program of the rendering parameter is executed by processor
Realize as adaptive edge softening method such as above-mentioned rendering parameter.
In order to realize above-described embodiment, the embodiment of the present invention also proposed a kind of computer equipment, including memory, processing
Device and storage on a memory and the computer program that can run on a processor, when the processor executes described program, reality
Now edge softening method as adaptive such as above-mentioned rendering parameter.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
It should be noted that in the claims, any reference symbol between parentheses should not be configured to power
The limitation that benefit requires.Word "comprising" does not exclude the presence of component or step not listed in the claims.Before component
Word "a" or "an" does not exclude the presence of multiple such components.The present invention can be by means of including several different components
It hardware and is realized by means of properly programmed computer.In the unit claims listing several devices, these are filled
Several in setting, which can be, to be embodied by the same item of hardware.The use of word first, second, and third is not
Indicate any sequence.These words can be construed to title.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include one or more of the features.In the description of the present invention,
The meaning of " plurality " is two or more, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It is interpreted as that identical embodiment or example must be directed to.Moreover, particular features, structures, materials, or characteristics described
It may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this
The technical staff in field can be by the spy of different embodiments or examples described in this specification and different embodiments or examples
Sign is combined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of edge softening method that rendering parameter is adaptive, which comprises the following steps:
Original image is obtained, and FIG pull handle is carried out to obtain foreground image to the original image；
The edge pixel point of the foreground image is obtained, and chain encoding processing is carried out to obtain marginal point to the edge pixel point
Sequence；
The edge line of the foreground image is split into a plurality of smooth paragraph according to the edge point sequence；
The gradient value of each edge pixel point on every smooth paragraph is calculated, and according to each edge pixel on every smooth paragraph
The gradient value of point calculates every corresponding average gradient value of smooth paragraph；
The softening range of every smooth paragraph is obtained, according to every corresponding average gradient value of smooth paragraph so as to the prospect
The edge of image is softened, wherein the average gradient value is inversely proportional with the softening range.
2. the adaptive edge softening method of rendering parameter as described in claim 1, which is characterized in that compiled using Freeman
Code method carries out chain encoding processing to the edge pixel point.
3. the adaptive edge softening method of rendering parameter as claimed in claim 1 or 2, which is characterized in that according to the side
The edge line of the foreground image is split into a plurality of smooth paragraph by edge point sequence, comprising:
Handled using preset unit window along the edge point sequence sliding, and using smoothness be more than preset value window as
The cut-point of different smooth paragraphs, splits into a plurality of smooth paragraph for the edge line of the foreground image.
4. the adaptive edge softening method of rendering parameter as claimed in claim 3, which is characterized in that calculating every smoothly
On paragraph before the gradient value of each edge pixel point, also pass through Hough transformation for the marginal point sequence fit of every smooth paragraph
At Bezier.
5. the adaptive edge softening method of rendering parameter as claimed in claim 4, which is characterized in that the Bezier
Expression formula are as follows:
Wherein,WithTwo endpoints of respectively every smooth paragraph,For the control point of Bezier, the tool at control point
Body parameter can be acquired by Hough transformation.
6. the adaptive edge softening method of rendering parameter according to any one of claims 1 to 5, which is characterized in that described
Gradient value is calculated according to following steps:
Centered on edge pixel point, lateral chromatic aberration and longitudinal chromatic aberration are obtained respectively；
Evolution is carried out to obtain the gradient value to the quadratic sum of the lateral chromatic aberration and the longitudinal chromatic aberration.
7. the adaptive edge softening method of rendering parameter as described in claim 1, which is characterized in that the foreground image
Edge softened, comprising:
The foreground image is subjected to N times of oversubscription, wherein N is the positive integer greater than 1；
Corresponding softening length is obtained according to the softening range of every smooth paragraph, and according to corresponding to each edge pixel point
Soften length, the normal direction along each edge pixel point carries out coordinate migration outward, to carry out edge swell, wherein into
When row edge swell, the circle of equal altitudes based on transparency is formed on N times of oversubscription figure according to the new edge that expansion generates；
The N times of oversubscription figure is compressed according to the original size of the foreground image, and institute is obtained according to the circle of equal altitudes
The transparency mean value on N times of oversubscription figure in each N*N window is stated, and using the transparency mean value as corresponding new after compression
The transparency of coordinate points.
8. the adaptive edge softening method of rendering parameter as claimed in claim 7, which is characterized in that according to the following formula into
The migration of row coordinate:
X2=X1+cos θ * r,
Y2=Y1+sin θ * r,
Wherein, (X1, Y1) is the coordinate of each edge pixel point, and (X2, Y2) is the coordinate after migration, and r is softening length, and θ is
Normal orientation.
9. a kind of computer readable storage medium, which is characterized in that be stored thereon with the adaptive edge softening journey of rendering parameter
Sequence, the rendering parameter adaptive edge softening program are realized as described in any one of claim 1-8 when being executed by processor
The adaptive edge softening method of rendering parameter.
10. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that when the processor executes described program, realize as of any of claims 1-8
The adaptive edge softening method of rendering parameter.
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