CN109685862A - A kind of method that CT slice is directly changed into 3D printing G code - Google Patents
A kind of method that CT slice is directly changed into 3D printing G code Download PDFInfo
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- CN109685862A CN109685862A CN201811519580.XA CN201811519580A CN109685862A CN 109685862 A CN109685862 A CN 109685862A CN 201811519580 A CN201811519580 A CN 201811519580A CN 109685862 A CN109685862 A CN 109685862A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T9/00—Image coding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/40—Extraction of image or video features
- G06V10/44—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
- G06V10/74—Image or video pattern matching; Proximity measures in feature spaces
- G06V10/75—Organisation of the matching processes, e.g. simultaneous or sequential comparisons of image or video features; Coarse-fine approaches, e.g. multi-scale approaches; using context analysis; Selection of dictionaries
- G06V10/752—Contour matching
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Abstract
The invention discloses a kind of CT to be sliced the method for being directly changed into 3D printing G code, key step are as follows: 1) obtains several CT sectioning images to 3D printing object.2) geological information of sectioning image.3) Entities Matching, outer profile matching and Internal periphery is carried out to adjacent sectioning image to match.After the completion of matching, judge contiguous slices image with the presence or absence of bifurcated, and if it exists, to be then transferred to step 4, if it does not exist, then go to step 5.4) bifurcated matching is carried out to the forked contiguous slices image of tool.6) interlayer interpolation processing is carried out to two layers adjacent of sectioning image.7) each layer data is filled and is scanned, obtain scan line, and scan line is encoded into the G code for 3D printing.This invention simplifies data handling procedures, shorten the period of reverse, while efficiently solving bifurcation problem, also improve the quality of matched precision and 3D printing.
Description
Technical field
The present invention relates to 3D printing field, specifically a kind of CT is sliced the method for being directly changed into 3D printing G code.
Background technique
At present, the integrated path of industry CT and 3D printing mainly has 2: 1) Files from Industrial CT Slicing → CAD model → STL
File → 3D printing data, 3 Victoria C AD model reconstructions account for the 90%~95% of the reverse time in which, and digital scanning is only
5%~10% is accounted for, while the profile information of stl file has a large amount of redundant data even mistake；2) Files from Industrial CT Slicing →
Stl file → 3D printing data not can avoid the defect of stl file although which does not have to carry out CAD modeling.
Summary of the invention
Present invention aim to address problems of the prior art.
To realize the present invention purpose and the technical solution adopted is that such, a kind of CT slice is directly changed into 3D printing G
The method of code, mainly comprises the steps that
1) several CT sectioning images to 3D printing object are obtained.
2) each CT sectioning image is pre-processed, to obtain the geological information of sectioning image.
The geological information mainly includes entity, outer profile, Internal periphery, segment and point set.Wherein entity by Internal periphery and
Outer profile composition.Internal periphery and outer profile are made of segment.If segment is formed by doing.
3) Entities Matching is carried out to adjacent sectioning image.
The method of Entities Matching is the registration for calculating adjacent slice.Entities Matching includes one-to-one, a pair of two or one
To more matchings.
4) outer profile matching is carried out to adjacent sectioning image and Internal periphery matches.After the completion of matching, contiguous slices are judged
Image whether there is bifurcated, and if it exists, is then transferred to step 5, if it does not exist, then gos to step 6.
When Internal periphery or outer profile match, profile is recorded with tree construction.The nest relation of the depth representing profile of tree.
Internal periphery or outer profile matching include one-to-one, a pair of two or one-to-many matching.
The method for judging whether there is bifurcated are as follows: whether the corresponding relationship for judging contiguous slices image is one-to-one, if so,
Bifurcated is then not present, if it is not, then there is bifurcated.
5) to having forked contiguous slices image progress bifurcated matching, make the one-to-one corresponding pass of contiguous slices image
System.
The matched method of bifurcated is as follows:
I the Internal periphery and outer profile of contiguous slices image entities) are split as segment.
The method that Internal periphery and outer profile are split as segment is as follows:
A) curvature of outer profile or Internal periphery each point is calculated.
B) the identical point of curvature constitutes a segment.
II contiguous slices image segments) are matched, thus the corresponding relationship of sectioning image by a pair two or one-to-many conversion
It is one-to-one.
6) interlayer interpolation processing is carried out to two layers adjacent of sectioning image.
7) each layer data is filled and is scanned, obtain scan line, and scan line is encoded into the G for 3D printing
Code.
The solution have the advantages that unquestionable.The present invention be directed to industry CT and 3D printing the characteristics of, realize by
Workpiece Files from Industrial CT Slicing directly generates the G code formatted file for 3D printing.The present invention has been effectively shielded from the 3 of exemplar
The generation of Victoria C AD modeling and stl file, simplifies data handling procedure, shortens the period of reverse.The present invention uses cutting plate
The method of section also improves matched precision while efficiently solving bifurcation problem.The present invention carries out line to interlayer profile
The G code model surface transition obtained after property interpolation is smoother, improves 3D printing part quality.
Detailed description of the invention
Fig. 1 is the method flow diagram that CT slice is directly changed into 3D printing G code；
Fig. 2 is geological information schematic diagram in slice；
Fig. 3 is entity registration schematic diagram；
Fig. 4 is profile nest relation and corresponding arborescence I；
Fig. 5 is profile nest relation and corresponding arborescence II；
Fig. 6 is profile nest relation and corresponding arborescence III；
Fig. 7 is fragmentary views；
Fig. 8 is interpolation processing schematic diagram；
Fig. 9 is the G code conversion process schematic diagram of wheel hub slice.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention only
It is limited to following embodiments.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and used
With means, various replacements and change are made, should all include within the scope of the present invention.
Embodiment 1:
Referring to Fig. 1, a kind of method that CT slice is directly changed into 3D printing G code is mainly comprised the steps that
1) several CT sectioning images to 3D printing object are obtained.
2) each CT sectioning image is pre-processed, to obtain the geological information of sectioning image.
The geological information mainly includes entity, outer profile, Internal periphery, segment and point set.Wherein entity by Internal periphery and
Outer profile composition.Internal periphery and outer profile are made of segment.If segment is formed by doing.Geological information is as shown in Figure 2.
3) Entities Matching is carried out to adjacent sectioning image.
The method of Entities Matching is the registration for calculating adjacent slice, as shown in figure 3, A, B are respectively contiguous slices figure
The entity of picture, C indicate the registration of contiguous slices image.Entities Matching includes one-to-one, a pair of two or one-to-many matching.
4) outer profile matching is carried out to adjacent sectioning image and Internal periphery matches.After the completion of matching, contiguous slices are judged
Image whether there is bifurcated, and if it exists, is then transferred to step 5, if it does not exist, then gos to step 6.
When Internal periphery or outer profile match, profile is recorded with tree construction.The nest relation of the depth representing profile of tree.Example
It such as, include profile 3, profile 4, profile 8 in profile 1 in Fig. 4 and Fig. 5, profile 2 includes profile 5, profile 6, profile 7, profile 9,
Include profile 8 in profile 3, includes profile 9 in profile 6, therefore, tree structure is as shown in Figure 6.
Internal periphery or outer profile matching include one-to-one, a pair of two or one-to-many matching.
The method for judging whether there is bifurcated are as follows: whether the corresponding relationship for judging contiguous slices image is one-to-one, if so,
Bifurcated is then not present, if it is not, then there is bifurcated.
5) to having forked contiguous slices image progress bifurcated matching, make the one-to-one corresponding pass of contiguous slices image
System.
I the Internal periphery and outer profile of contiguous slices image entities) are split as segment.
The method that Internal periphery and outer profile are split as segment is as follows:
A) curvature of outer profile or Internal periphery each point is calculated.
B) the identical point of curvature constitutes a segment.
II contiguous slices image segments) are matched, thus the corresponding relationship of sectioning image by a pair two or one-to-many conversion
It is one-to-one.
6) interlayer interpolation processing is carried out to two layers adjacent of sectioning image.As shown in figure 8, U indicates upper layer sectioning image, B
Indicate that lower layer's sectioning image, U indicate linear interpolation.
7) each layer data is filled and is scanned, obtain scan line, and scan line is encoded into the G for 3D printing
Code.
Embodiment 2:
A kind of CT slice is directly changed into the experiment of 3D printing G code method printing wheel hub, and key step is as follows:
1) several CT sectioning images of wheel hub are obtained.
2) each CT sectioning image is pre-processed, to obtain the geological information of sectioning image.
3) Entities Matching is carried out to adjacent sectioning image.
4) outer profile matching is carried out to adjacent sectioning image and Internal periphery matches.After the completion of matching, contiguous slices are judged
Image whether there is bifurcated, and if it exists, is then transferred to step 5, if it does not exist, then gos to step 6.
5) to having forked contiguous slices image progress bifurcated matching, make the one-to-one corresponding pass of contiguous slices image
System.
I the Internal periphery and outer profile of contiguous slices image entities) are split as segment, as shown in Figure 7.
II contiguous slices image segments) are matched, thus the corresponding relationship of sectioning image by a pair two or one-to-many conversion
It is one-to-one.
6) interlayer interpolation processing is carried out to two layers adjacent of sectioning image.
7) each layer data is filled and is scanned, obtain scan line, and scan line is encoded into the G for 3D printing
Code, as shown in Figure 9.
Claims (7)
1. a kind of CT is sliced the method for being directly changed into 3D printing G code, which is characterized in that mainly comprise the steps that
1) several CT sectioning images to 3D printing object are obtained；
2) each CT sectioning image is pre-processed, to obtain the geological information of sectioning image.
3) Entities Matching is carried out to adjacent sectioning image；
4) outer profile matching is carried out to adjacent sectioning image and Internal periphery matches；After the completion of matching, contiguous slices image is judged
With the presence or absence of bifurcated, and if it exists, be then transferred to step 5, if it does not exist, then go to step 6；
5) to having forked contiguous slices image progress bifurcated matching, make the one-to-one corresponding relationship of contiguous slices image；
6) interlayer interpolation processing is carried out to two layers adjacent of sectioning image；
7) each layer data is filled and is scanned, obtain scan line, and scan line is encoded into the G generation for 3D printing
Code.
2. a kind of CT according to claim 1 is sliced the method for being directly changed into 3D printing G code, it is characterised in that: institute
Stating geological information mainly includes entity, outer profile, Internal periphery, segment and point set；Wherein entity is made of Internal periphery and outer profile；
Internal periphery and outer profile are made of segment；If segment is formed by doing.
3. a kind of CT according to claim 1 or 2 is sliced the method for being directly changed into 3D printing G code, it is characterised in that:
The method of Entities Matching is the registration for calculating adjacent slice；Entities Matching includes one-to-one, a pair of two or one-to-many
Match.
4. a kind of CT according to claim 1 or 2 is sliced the method for being directly changed into 3D printing G code, it is characterised in that:
When Internal periphery or outer profile match, profile is recorded with tree construction；The nest relation of the depth representing profile of tree；
Internal periphery or outer profile matching include one-to-one, a pair of two or one-to-many matching.
5. a kind of CT according to claim 1 is sliced the method for being directly changed into 3D printing G code, which is characterized in that point
Pitch matching process are as follows:
1) Internal periphery and outer profile of contiguous slices image entities are torn open and is split as segment；
2) contiguous slices image segments are matched, so that the corresponding relationship of sectioning image is converted to a pair by a pair two or one-to-many
One.
6. a kind of CT according to claim 1 is sliced the method for being directly changed into 3D printing G code, which is characterized in that sentence
The disconnected method with the presence or absence of bifurcated are as follows: whether the corresponding relationship for judging contiguous slices image is one-to-one, if so, there is no divide
Fork, if it is not, then there is bifurcated.
7. a kind of CT according to claim 1 is sliced the method for being directly changed into 3D printing G code, which is characterized in that will
The method that Internal periphery and outer profile are split as segment is as follows:
1) curvature of outer profile or Internal periphery each point is calculated；
2) the identical point of curvature constitutes a segment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113478834A (en) * | 2021-06-30 | 2021-10-08 | 广州市健齿生物科技有限公司 | 3D printing method, device and equipment |
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| CN113478834A (en) * | 2021-06-30 | 2021-10-08 | 广州市健齿生物科技有限公司 | 3D printing method, device and equipment |
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Application publication date: 20190426 |