CN105761253B - A kind of three dimensions virtual data high definition screenshot method - Google Patents
A kind of three dimensions virtual data high definition screenshot method Download PDFInfo
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- 238000009877 rendering Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
- G06T3/4038—Image mosaicing, e.g. composing plane images from plane sub-images
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/60—Memory management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10004—Still image; Photographic image
- G06T2207/10012—Stereo images
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Abstract
The present invention relates to field of computer technology, disclose a kind of three dimensions virtual data high definition screenshot method, screen area image data is subjected to N horizontally and vertically etc. points of operation, it divides and obtains the screen data region unit of the sizes such as N*N, each screen data region unit is referred to as elementary area, it is identified with n rows n row, by data area segmentation and picture anastomosing and splicing, completes three dimensions virtual data high definition sectional drawing.Memory usage, sectional drawing stability are good when the present invention has the effect of reducing sectional drawing.
Description
Technical field
The present invention relates to field of computer technology, more particularly to a kind of three dimensions virtual data high definition screenshot method.
Background technology
Conventional needle carries out high definition sectional drawing to magnanimity three-dimensional data, needs completely to load data, sometimes will be because
For exhausting for memory source, cause the abnormal either picture of picture effect that cannot normally generate.In high definition sectional drawing scheme, it will shield
Curtain region cutting is that multi-block data distinguishes sectional drawing, is general way, but the realization of the way is on condition that number for a small pieces
According to progress, it may be possible to the amplification to a piece of cell, it is also possible to which the amplification to a building house, there is no carry out pipe for memory
Reason, therefore, during these sectional drawings, it is difficult to which memory source, which occurs, occupies excessively high problem, stability can be protected substantially
Card.But the data in entire city, even national, when needing sectional drawing, the big data quantity bottleneck problem that can be encountered is cut in high definition
It will appear that EMS memory occupation is high, problem of sectional drawing stability difference during figure.
Invention content
It is empty to provide a kind of three dimensions for the disadvantage that the present invention is high for EMS memory occupation in the prior art, sectional drawing is unstable
Quasi- data high definition screenshot method.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals：
A kind of three dimensions virtual data high definition screenshot method, by screen area image data progress horizontal direction and vertically
The N in direction etc. points of operations, divide and obtain the screen data region unit of the sizes such as N*N, and each screen data region unit is referred to as
Elementary area is identified with n rows n row, is included the following steps：
(1) projection relation, the screen resolution of n row n row elementary areas are set, and calculate the viewport of n row n row elementary areas
Size, what comes into a driver's body size；
(2) in the elementary area of certain row row, data area segmentation is carried out；
(3) data area segmentation includes following control parameter：V indicates that the predetermined load threshold value of data, m indicate in vertical direction
The length in region is divided since viewpoint position；First, from the range of viewpoint 0 to m, the preloading of a data is carried out
Operation reduces m values, carries out the weight in region when the data actual loaded numerical value C of acquisition is more than the predetermined load threshold value V of setting
It is new to divide, if after repartitioning, C values carry out reducing m Value Operations again, repeatedly, until C value stabilizations exist still more than V values
Within the scope of V values, m is worth to determining m ' values；When C values are within the scope of V values, then the load of three-dimensional data is proceeded by, data add
It after the completion of load, is rendered, rendering result is saved in image frame buffer；
(4) and then data area continues to divide, and range judges C values whether within the scope of V values from m ' to 2m ', if so,
Then data area divides range to adjacent 2m ' Dao 3m '；Range judges C values whether within the scope of V values from 2m ' to 3m ', if
It is that then data area divides range to adjacent 3m ' Dao 4m ', and repeats this operation；If C values are more than V values, step 3 is carried out
M ' the values of operation, next region division range confirm according to the m ' values of upper one and adjacent area, reach until dividing range
Stop when preset critical distance, then single image unit sectional drawing is completed；
(5) elementary area is stored in the image information in image frame buffer to handle, image frame buffer is received per frame
To after image information, image frame buffer preserves depth buffer, the color cache information of image, compares the image information received,
By carrying out pixel replacement according to depth buffer information, the pixel of same position, depth information it is big cannot replace depth information
Small；
(6) image frame buffer processing final result is exactly the final image-forming information of the elementary area, by the elementary area
Image-forming information is written in picture file and is preserved, while it is the data of n rows n row to mark the picture file；
(7) shot operation for carrying out next elementary area repeats the operation that step 3 arrives step 6；
(8) after all elementary areas are write as picture file, there can be N*N pictures；
(9) picture anastomosing and splicing：Picture is N*N dispersion file, and basic unit of splicing is A*A, according to ranks number N*N,
Basic splicing unit A*A calculates picture number G*G, G=int (N/A), then starts the cycle over at each splicing unit
Reason；In each basic splicing unit, the picture splicing fusion in horizontal direction is carried out first, by the image data in same a line
A pictures are merged into, often row merges successively；After the completion of waiting for that row used merges, the picture then carried out in vertical direction is spelled
Fusion is connect, A*A pictures are finally synthesized into a pictures；It is more according to the splicing rule of A*A when N does not divide exactly A
Go out the data of N%A ranks, final picture number will be maintained at G*G=int (N/A) * int (N/A), therefore they are grouped into it
Near concatenation unit in, that is, be in edge concatenation unit size between A*A and 2A*2A.
Preferably, projection relation is rectangular projection or perspective projection.
Preferably, after certain region division, when the ratio of C values and V values is less than or equal to 0.2, m value increasings are carried out
It is long.
The present invention has significant technique effect as a result of above technical scheme：Pass through the region segmentation of this patent
Technology efficiently uses memory headroom and image imaging law, is utilized in treatment effeciency and memory headroom and has above reached a balance,
By subregional sectional drawing, it is excessively high and cause image unstable to avoid memory during sectional drawing；And picture integration technology then has
Relationship between effect processing achievement picture final number and individual resolution ratio, facilitates the processing operation in later stage.
Specific implementation mode
Present invention is further described in detail for following example.
Embodiment 1
A kind of three dimensions virtual data high definition screenshot method, by screen area image data progress horizontal direction and vertically
The N in direction etc. points of operations, divide and obtain the screen data region unit of the sizes such as N*N, and each screen data region unit is referred to as
Elementary area is identified with n rows n row, because sectional drawing is the scene image data for intercepting entire screen, needs to divide equally screen
At N*N blocks, and achievement photo resolution is necessary for N times of screen size, then on each screen data region unit, passes through
Specific sectional drawing parameter is set, the data of the screen data region unit are amplified into N times, sectional drawing, the picture size of generation and entirely
Screen size is identical, and by effect effect amplify N times, it is further comprising the steps of to realize the function of high definition sectional drawing：
(1) projection relation, the screen resolution of n row n row elementary areas are set, and projection relation is rectangular projection, and calculates n
Viewport size, the what comes into a driver's body size of row n row elementary areas；
(2) in the elementary area of certain row row, data area segmentation is carried out；
(3) data area segmentation includes following control parameter：V indicates that the predetermined load threshold value of data, m indicate in vertical direction
The length in region is divided since viewpoint position；First, from the range of viewpoint 0 to m, the preloading of a data is carried out
Operation reduces m values, carries out the weight in region when the data actual loaded numerical value C of acquisition is more than the predetermined load threshold value V of setting
It is new to divide, if after repartitioning, C values carry out reducing m Value Operations again, repeatedly, until C value stabilizations exist still more than V values
Within the scope of V values, m is worth to determining m ' values；When C values are within the scope of V values, then the load of three-dimensional data is proceeded by, data add
It after the completion of load, is rendered, rendering result is saved in image frame buffer；
(4) and then data area continues to divide, and range judges C values whether within the scope of V values from m ' to 2m ', if so,
Then data area divides range to adjacent 2m ' Dao 3m '；Range judges C values whether within the scope of V values from 2m ' to 3m ', if
It is that then data area divides range to adjacent 3m ' Dao 4m ', and repeats this operation；If C values are more than V values, step 3 is carried out
M ' the values of operation, next region division range confirm according to the m ' values of upper one and adjacent area, reach until dividing range
Stop when preset critical distance, then single image unit sectional drawing is completed；
(5) elementary area is stored in the image information in image frame buffer to handle, image frame buffer is received per frame
To after image information, image frame buffer preserves depth buffer, the color cache information of image, compares the image information received,
By carrying out pixel replacement according to depth buffer information, the pixel of same position, depth information it is big cannot replace depth information
It is small, that is, depth information is smaller, it is higher that pixel replaces priority；
(6) image frame buffer processing final result is exactly the final image-forming information of the elementary area, by the elementary area
Image-forming information is written in picture file and is preserved, while it is the data of n rows n row to mark the picture file；
(7) shot operation for carrying out next elementary area repeats the operation that step 3 arrives step 6；
(8) after all elementary areas are write as picture file, there can be N*N pictures；
(9) picture anastomosing and splicing：Picture is N*N dispersion file, and basic unit of splicing is A*A, according to ranks number N*N,
Basic splicing unit A*A calculates picture number G*G, G=int (N/A), then starts the cycle over at each splicing unit
Reason；In each basic splicing unit, the picture splicing fusion in horizontal direction is carried out first, by the image data in same a line
A pictures are merged into, often row merges successively；After the completion of waiting for that row used merges, the picture then carried out in vertical direction is spelled
Fusion is connect, A*A pictures are finally synthesized into a pictures；It is more according to the splicing rule of A*A when N does not divide exactly A
Go out the data of N%A ranks, final picture number will be maintained at G*G=int (N/A) * int (N/A), therefore they are grouped into it
Near concatenation unit in, that is, be in edge concatenation unit size between A*A and 2A*2A.
Embodiment 2
With embodiment 1, except that projection relation is perspective projection.
Embodiment 3
With embodiment 1, except that after certain region division, when the ratio of C values and V values is equal to 0.2, m is carried out
Value increases.
Embodiment 4
A kind of three dimensions virtual data high definition screenshot method, by screen area image data progress horizontal direction and vertically
The operation of equal point of the 18 of direction, divides and obtains the screen data region unit of the sizes such as 18*18, each screen data region unit is referred to as
For elementary area, it is identified with n rows n row, because sectional drawing is the scene image data for intercepting entire screen, is needed screen is equal
It is divided into 18*18 blocks, and achievement photo resolution is necessary for 18 times of screen size, then in each screen data region unit
On, by the way that specific sectional drawing parameter is arranged, the data of the screen data region unit are amplified into 18 times, sectional drawing, the picture of generation is big
It is small identical with entire screen size, and effect effect is amplified 18 times, further include following to realize the function of high definition sectional drawing
Step：
(1) projection relation, the screen resolution of n row n row elementary areas are set, and projection relation is rectangular projection, and calculates n
Viewport size, the what comes into a driver's body size of row n row elementary areas；
(2) in the elementary area of certain row row, data area segmentation is carried out；
(3) data area segmentation includes following control parameter：V indicates that the predetermined load threshold value of data, m indicate in vertical direction
The length in region is divided since viewpoint position, the present embodiment m is 500 meters, and V indicates predetermined load data link table membership,
Predetermined load data link table membership is 500；First, from the range of 0 to 500 meters of viewpoint, a data are carried out
Preload operation, when the data actual loaded numerical value C of acquisition is more than the predetermined load threshold value 500 of setting, C is 800,
Reduce m values, carries out repartitioning for region, when m values are reduced, C values also accordingly decline, if after repartitioning, C values are more than still
V values carry out reducing m Value Operations again, and repeatedly, until C value stabilizations are within the scope of V values, m is worth to determining m ' values, m '
Value is 250 meters, and C values also accordingly fall to 400；When C values are within the scope of V values, then the load of three-dimensional data, data are proceeded by
It after the completion of load, is rendered, rendering result is saved in image frame buffer；
(4) and then data area continues to divide, and range judges C values whether within the scope of V values from m ' to 2m ', if so,
Then data area divides range to adjacent 2m ' Dao 3m '；Range judges C values whether within the scope of V values from 2m ' to 3m ', if
It is that then data area divides range to adjacent 3m ' Dao 4m ', and repeats this operation；If C values are more than V values, step 3 is carried out
M ' the values of operation, next region division range confirm according to the m ' values of upper one and adjacent area, reach until dividing range
Stop when preset critical distance, then single image unit sectional drawing is completed；
(5) elementary area is stored in the image information in image frame buffer to handle, image frame buffer is received per frame
To after image information, image frame buffer preserves depth buffer, the color cache information of image, compares the image information received,
By carrying out pixel replacement according to depth buffer information, the pixel of same position, depth information it is big cannot replace depth information
It is small, that is, depth information is smaller, it is higher that pixel replaces priority；
(6) image frame buffer processing final result is exactly the final image-forming information of the elementary area, by the elementary area
Image-forming information is written in picture file and is preserved, while it is the data of n rows n row to mark the picture file；
(7) shot operation for carrying out next elementary area repeats the operation that step 3 arrives step 6；
(8) after all elementary areas are write as picture file, there can be 18*18 pictures；
(9) picture anastomosing and splicing：Picture is 18*18 dispersion file, and basic unit of splicing is 5*5, according to ranks number 18*
18, splicing unit 5*5 substantially calculates picture number G*G, G=int (18/5)=3, then starts the cycle over single to each splicing
Position is handled；In each basic splicing unit, the picture splicing fusion in horizontal direction is carried out first, it will be in same a line
Image data is merged into a pictures, and often row merges successively；After the completion of waiting for that row used merges, then carry out in vertical direction
Picture splicing fusion, 25 pictures are finally synthesized into a pictures；When 18 do not divide exactly 5, according to the splicing of 5*5
Rule has more the data of 3 rows 3 row, and final picture number will be maintained at G*G=3*3=9, therefore they are grouped near them
Concatenation unit in, that is, be in edge concatenation unit size between 5*5 and 10*10.
In short, the foregoing is merely presently preferred embodiments of the present invention, it is all according to impartial made by scope of the present invention patent
Variation and modification, should all belong to the covering scope of patent of the present invention.
Claims (3)
1. screen area image data is carried out horizontal direction and Vertical Square by a kind of three dimensions virtual data high definition screenshot method
To N etc. points of operations, divide and obtain the screen data region unit of the sizes such as N*N, each screen data region unit is referred to as to scheme
As unit, it is identified with n rows n row, which is characterized in that include the following steps：
(1) projection relation, the screen resolution of n row n row elementary areas are set, and the viewport for calculating n row n row elementary areas is big
Small, what comes into a driver's body size；
(2) in the elementary area of certain row row, data area segmentation is carried out；
(3) data area segmentation includes following control parameter：V indicates the predetermined load threshold value of data, m indicate in vertical direction from regarding
Point position starts to divide the length in region；First, from the preloading behaviour in the range of viewpoint 0 to m, carrying out a data
Make, when the data actual loaded numerical value C of acquisition is more than the predetermined load threshold value V of setting, reduces m values, carry out region again
It divides, if after repartitioning, C values carry out reducing m Value Operations again, repeatedly, until C value stabilizations are in V still more than V values
It is worth in range, m is worth to determining m ' values；When C values are within the scope of V values, then the load of three-dimensional data, data load are proceeded by
After the completion, it is rendered, rendering result is saved in image frame buffer；
(4) and then data area continues to divide, and range judges C values whether within the scope of V values from m ' to 2m ', if it is, number
According to region division range to adjacent 2m ' Dao 3m '；Range judges C values whether within the scope of V values from 2m ' to 3m ', if so,
Then data area divides range to adjacent 3m ' Dao 4m ', and repeats this operation；If C values are more than V values, the behaviour of step 3 is carried out
Make, the p value of next region division range confirms according to the m ' values of upper one and adjacent area, reaches advance until dividing range
Stop when the critical distance of setting, then single image unit sectional drawing is completed；
(5) elementary area is stored in the image information in image frame buffer to handle, image frame buffer receives figure per frame
As after information, image frame buffer preserves depth buffer, the color cache information of image, compares the image information received, passes through
Carry out pixel replacement according to depth buffer information, the pixel of same position, depth information it is big cannot to replace depth information small；
(6) image frame buffer processing final result is exactly the final image-forming information of the elementary area, by the imaging of the elementary area
Information is written in picture file and is preserved, while it is the data of n rows n row to mark the picture file；
(7) shot operation for carrying out next elementary area repeats the operation that step 3 arrives step 6；
(8) after all elementary areas are write as picture file, there can be N*N pictures；
(9) picture anastomosing and splicing：Picture is N*N dispersion file, and basic unit of splicing is A*A, according to ranks number N*N, substantially
Splicing unit A*A calculates picture number G*G, G=int (N/A), then starts the cycle over and handles each splicing unit；
In each basic splicing unit, the picture splicing fusion in horizontal direction is carried out first, the image data in same a line is closed
It is often capable to merge successively and at a pictures；After the completion of waiting for that all rows merge, the picture splicing in vertical direction is then carried out
A*A pictures are finally synthesized a pictures by fusion；When N does not divide exactly A, according to the splicing rule of A*A, have more
The data of N%A ranks, final picture number will be maintained at G*G=int (N/A) * int (N/A), therefore they are grouped into them
In neighbouring concatenation unit, that is, the size of the concatenation unit at edge is between A*A and 2A*2A.
2. a kind of three dimensions virtual data high definition screenshot method according to claim 1, it is characterised in that：Projection relation
For rectangular projection or perspective projection.
3. a kind of three dimensions virtual data high definition screenshot method according to claim 1, it is characterised in that：In certain area
After domain divides, when the ratio of C values and V values is less than or equal to 0.2, m value growths are carried out.
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| JP2005215760A (en) * | 2004-01-27 | 2005-08-11 | Seiko Epson Corp | Method, system and program for extracting figure candidate region in image, and method, system and program for deciding top/bottom of figure image |
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| CN103971414A (en) * | 2014-04-30 | 2014-08-06 | 深圳职业技术学院 | Method and system for making visualized true three-dimensional map |
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