KR101509143B1 - Method for Handling 3-Dimensional Scanning Data for Excavation and Analysis of Cultural Assets - Google Patents

Abstract

According to the present invention, depth and shape size can be easily grasped by providing a uniform color level and an image surface level by utilizing three-dimensional data, and it is possible to produce a compatible file even in a heterogeneous program. A three-dimensional data extraction step of extracting an image of a scene as three-dimensional data; An equal level display step of extracting the level of each layer of the extracted three-dimensional data by contour lines; An image surface level display step of displaying the color levels of each layer separately for each contour line; And a file conversion step of converting the image surface level into a file compatible on a program to be reproduced so that the processed image data can be subjected to a section extraction, a line extraction, and an image extraction. The three-dimensional scanning A data processing method is provided.

Description

Technical Field [0001] The present invention relates to a three-dimensional scanning data processing method and a three-dimensional scanning data processing method,

The present invention relates to a three-dimensional scanning data processing method for investigating cultural properties and analyzing erosion, and more particularly, to a method for processing three-dimensional scanning data by using three-dimensional scanning data extracted from an image of a digging site, The present invention relates to a method of processing a three-dimensional scanning data for archaeological survey and archaeological analysis.

In general, the first step in the study of archaeological artefacts related to cultural properties is to carry out an investigation of the excavated sites and estuaries.

At this time, it is not a task to rescue artifacts, but to reveal how artifacts are located under what conditions in the remains, how they relate to artifacts and other artifacts, and considering the character, culture, and historical facts of the entire remains Should be investigated.

Therefore, in order to make a lot of records and data for this research, it should be measured and photographed in the excavation investigation and the analysis of the eternity, and then it should be recorded and provided as the data necessary for the research.

Existing excavation methods were carried out by peeling off excavation pits through tile, quadrature, and cascade excavation. Through this analysis, how the strata were piled up and how they connected with each other was investigated and analyzed.

The contents of the report through these investigations and analyzes are written to include excavation history, progress, historical environment, and excavation investigation. In addition to the survey results, drawings and photographs are included as basic data for academic research.

In particular, if you look at the existing methods of drawing creation, you can draw on a grid paper by dividing it into a regular checkerboard form at the excavation site, and create 3D scanning based on aerial photographs or still photographs. And there is a method of performing a drawing operation.

More specifically, as shown in FIG. 1, a line is drawn by drawing an aerial photograph or a 2D photo image with the background open on the illustration and CAD screen. In this case, information about an appropriate scale and dimensions is included It is difficult to use it as an accurate data.

As shown in FIG. 2, in the case of utilizing three-dimensional data, scale and actual information remain intact. However, in this case as well, since a line is drawn by being drawn with the background open, It is difficult to extract the line drawing by using the professional software, and it is difficult to distinguish the boundary of the three-dimensional data from the three-dimensional data because of insufficient understanding of the three-dimensional data when the researcher and the curator are working. It takes a lot.

In addition, three-dimensional data through precision measurement can be used for various applications such as plane, elevation, and section, as well as information capable of inputting dimensions and analyzing the shape. However, to date, drawing and drawing work processes have been performed by capturing or converting three-dimensional data into an image and using drawing and CAD drawing on a 2D image, It is very difficult to modify the drawings and to extract the data that is required in the form of delivery from the service organization in the situation where the necessary data is to be created and extracted.

Therefore, it is possible to work only by a 3D scanning company, and it is difficult to identify the depth and height of images in excavation or cultural institutions, and there are difficulties that can not be drawn. In addition, drawings of experts of excavation institutions and drawings of non- There are many levels of difference in itself, and the demands of each institution are also different.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve the above problems and to provide a method and apparatus for extracting three-dimensional scanning data, And to provide a 3D scanning data processing method for analysis and analysis.

It is another object of the present invention to provide a method and apparatus for extracting three-dimensional scanned data from three-dimensional PDF files for the purpose of extracting data according to a necessary requirement by a user, And a method for processing the same.

According to an aspect of the present invention, there is provided an image processing method including: a three-dimensional data extraction step of extracting an image of an excavation site as three-dimensional data; An equal level display step of extracting the level of each layer of the extracted three-dimensional data by contour lines; An image surface level display step of displaying the color levels of each layer separately for each contour line; And a file conversion step of converting the image surface level into a file compatible on a program to be reproduced so that the processed image data can be subjected to a section extraction, a line extraction, and an image extraction. The three-dimensional scanning Data processing method.

According to the present invention, the three-dimensional data extracting step may include: a scanning step of scanning an image of a digging site; A matching step of matching a plurality of individually acquired scanning data with one absolute coordinate; A conversion step of converting point data, which is initial raw data generated by matching, into polygon data through surface modification; An area setting step of dividing the converted polygon data into a part necessary for the drawing and an unnecessary part; A merging step of converting the data having undergone each mesh structure identification step into one data having one attribute; A full vertical and horizontal setting step of setting a vertical view by matching the vertical and horizontal values of the merged data to the coordinates; A full-size view capturing step of extracting a cube and a stereoscopic view into a high-resolution image in accordance with a full-size view for drawing; And an image scale fitting step of matching the extracted high resolution image with the size of the actual object.

According to the present invention, it is preferable that the scanning step generates a scanning image with a three-dimensional laser scanner for scanning the shape of an object and a light wave synchronized with the GPS to scan a wide area.

According to another aspect of the present invention, the equal level display step may include: a contour extracting step of extracting a contour line corresponding to the image; A color mapping step of mapping colors according to the extracted contour level; It is preferable to include an image merging step of merging the colored contour lines with the three-dimensional data image.

According to another aspect of the present invention, the contour extracting step includes the steps of: setting a maximum height and a minimum height for the etchant; Setting an equal spacing according to each requirement; Marking the contour lines according to the set contour intervals; And extracting only the labeled contour lines.

According to the method of the present invention for exploring cultural heritage and analysis of three-dimensional scanning data for analysis of etchant, it is possible to easily grasp the depth and shape size with a simple image only by providing an image using 3D data, In addition to CAD and Illustrations, all drawing programs have the advantage of being easy to draw with only 2-D images, as well as providing compatibility with 3D data in easy-to-use Adobe Acrobat.

In addition, according to the present invention, the three-dimensional scanning data processing method for searching for cultural properties and analyzing erosion can directly extract necessary parts, necessary sections and necessary lines while simultaneously viewing 3D PDF (three-dimensional data) It is possible to carry out the work efficiently, and there is no need of re-checking because the excavation agency and the investigation agency do the work directly, so there is an advantage that the work period can be shortened, the unit price and the whole process time can be reduced and the quality can be improved.

FIG. 1 is a diagram illustrating a screen in which a conventional two-dimensional photographic image is drawn in a state of being opened in the background,
2 is a diagram illustrating a screen drawing a line in a state where conventional three-dimensional data is opened in the background,
FIG. 3 is an overall flowchart of a three-dimensional scanning data processing method for cultural property excavation investigation and erosion analysis according to an embodiment of the present invention,
FIG. 4 is a detailed flowchart of the three-dimensional data extraction step of FIG. 3,
Fig. 5 is an exemplary panoramic image acquired by a scanner,
FIG. 6 is an illustration of color value data of the panoramic image of FIG. 5,
Figure 7 is an illustration of a matched scanned data image,
8 is an exemplary view of an image converted into polygon data,
Fig. 9 is an exemplary view of an area in which a necessary portion is set,
FIG. 10 is an exemplary view of merging data obtained through the mesh structure equalization step, FIG.
11 is an example of an image obtained by converting a merged image into data having one attribute,
12 is an example of an image in which a necessary portion and an unnecessary portion are divided to obtain a positive angle in accordance with coordinates,
FIG. 13 is an exemplary view in which a high-resolution image of a necessary site is extracted,
FIG. 14 is an exemplary view in which different angles and enlarged images of a part as needed are extracted according to each view,
Fig. 15 is an example of a screen reproduced on an actually compatible program,
16 is a detailed flowchart of the equal level display step,
Fig. 17 is an exemplary screen for setting the maximum and minimum heights with respect to the etalon;
Fig. 18 is a screen example for setting the contour interval according to each requirement,
Fig. 19 is an exemplary screen for marking contour lines according to the set contour intervals;
Fig. 20 is an exemplary screen for extracting only the marked contour lines,
21 is an exemplary screen in which an elevation equalization line is mapped,
22 is a diagram showing a screen image in which a topographic map is mapped,
23 is a screen example of merging extracted contour lines with a three-dimensional data image,
FIG. 24 is a view showing a screen divided into 10 steps for each layer for the image surface level, FIG.
25 is an elevation view according to the image surface level processing,
FIG. 26 is an exemplary view of a reproduction screen of data converted into a three-dimensional PDF file; FIG.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3, in the three-dimensional scanning data processing method for cultural property excavation investigation and erosion analysis according to the embodiment of the present invention, a three-dimensional data extracting step for extracting an image of a digging site as three-dimensional data S100).

More specifically, as shown in FIG. 4, the three-dimensional data extraction step S100 performs a scanning step S110 of scanning an image of a digging site.

The 3D laser scan used in the scanning step (S110) is mainly a process of obtaining the shape of an object as three-dimensional data. When a laser beam is emitted from a scanner toward an object, the beam is reflected from an object and returns to the laser scanner.

The laser scanner calculates the distance between the scanner and the object by calculating the return time of the beam.

The Leica Scanstation C10 scanner can fetch approximately 50,000 points per second, and the shape of the object can be obtained as three-dimensional data.

Since the laser has a linearity, it can not measure the invisible surface, so it scans the object in various directions to obtain the whole data.

In addition, when surveying (scanning) a wide area, it is photographed with a light source (measurement equipment scanner) linked with GPS. In this case, preparation for inputting the absolute coordinate value should be performed.

At this time, a new measurement point can be obtained by mounting the GPS on the main body of the surveying equipment scanner.

Survey (scan) in the form of a panorama, moving several areas to survey (scan) a large area. To obtain large area data, move several times and perform surveying.

FIG. 5 is an image scanned in the above panoramic form, and FIG. 6 is an image obtained by converting a panoramic image into color value data.

After performing the scanning step (S110), the matching step (S120) for matching the individually acquired scan data to one is performed.

As shown in FIG. 7, the registration step is a task of matching data obtained by multi-surveying (scanning) a wide excavation site to one absolute coordinate.

As shown in FIG. 8, the conversion step S130 of converting point data, which is initial raw data information generated by the matching step S120, into polygon data through surface modification is performed.

The area conversion step S140 is performed to convert the converted polygon data into a necessary part and unnecessary part of the polygon data as shown in FIG.

The area setting step S140 is to process the PDF and image handling lightly in the future.

The data having undergone the respective mesh structure identification steps is subjected to a merge step (S150) in which the data are converted into one data having one attribute.

FIG. 10 is a diagram illustrating an image obtained by merging data obtained through the mesh structure equalization step, and FIG. 11 illustrates an image obtained by converting a merged image into data having one attribute.

After performing the merging step S150, an entire vertical and horizontal setting step S160 is performed to set a regular view according to the coordinates and horizontal values as shown in FIG.

At this time, divide the necessary part and the unnecessary part and arrange the correct angle according to the coordinates.

After performing the entire vertical and horizontal setting step S160, a punctual view capturing step S170 is performed in which a flat view and an elevation view are extracted as a high resolution image according to a punctual view for drawing, as shown in FIG. 13 .

In the pertinent-view-capturing step S170, as shown in FIG. 14, in order to individually extract high-resolution images of important parts by each part, they are extracted for each step and for each sector, The image is extracted according to each view.

After performing the pertinent view capturing step (S170), an image scale fitting step (S180) is performed to match the extracted high resolution image with the actual object size.

In the above step, as shown in FIG. 15, the high-resolution image is adjusted to the actual size so as to be easily compatible with programs other than illustration or CAD, and the size is set to be constant so as to be operated in any program.

After performing all of the three-dimensional data extraction step S100 as described above, the post-processing step of performing data processing to edit the image so that the researchers of the excavation institution and the research institute can directly draw it is performed.

That is, an equal level display step (S200) for extracting the level of each layer of the three-dimensional data generated by the three-dimensional data extracting step (S100) by contour lines is performed.

As shown in FIG. 16, the equal level display step includes a contour extracting step S210 for extracting a contour corresponding to an image, a color mapping step S220 for mapping a color according to the extracted contour level, (S230) merging the contour lines with the three-dimensional data image.

As shown in FIG. 17, the contour line extracting step S210 includes setting a maximum height and a minimum height for the etchant, and setting a contour interval corresponding to each tool as shown in FIG. 18 (10, Marking the contour lines according to the contour intervals set as shown in FIG. 19, and extracting only the contour lines marked as shown in FIG. 20.

FIG. 21 is a diagram mapping the elevation contour lines, and FIG. 22 is a diagram mapping the contour lines of the plan view. In FIG.

Also, as shown in FIG. 23, when the extracted contour lines are merged with the three-dimensional data image, the depths can be distinguished when drawing the eternal parts by dividing the entire area in stages, and the overall size and shape can be easily grasped .

After the equal level display step S200 is performed as described above, an image surface level display step S300 is performed in which the color levels of each layer are divided into contour lines and extracted.

As shown in FIG. 24, the image surface level step may divide the entire area into colors and divide the depth according to the color level value when drawing the eternity, and the dimension of the level bar on the right side of the drawing shows the correct size and The height can be easily grasped.

FIG. 24 shows the image surface level divided into 10 steps for each layer.

25 also shows an elevation view in accordance with the image surface level processing.

After performing the image surface level processing step S300 as described above, a file conversion step S400 of converting the image surface level into a three-dimensional PDF file so that the processed data can be subjected to section extraction, line extraction, and image extraction .

As shown in FIG. 26, data converted into a 3D PDF file can be handled as 3D data, not as a 2D image, and after capturing a necessary portion such as enlargement and reduction, annotations on each view are added .

Also, you can see the illustration effect according to the view, and you can extract and confirm the cross section along each X, Y, Z axis for the required part, and check the section and length for each required part.

The 3D PDF file can easily handle the above three-dimensional data and improve the reliability of institutions and companies by acquiring parts directly required by excavation agencies and research institutes that can not meet all the needs of scanners and excavation agencies do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (5)

delete A three-dimensional data extraction step (S100) of extracting an image of an excavation site as three-dimensional data;
An equal level display step (S200) of extracting the level of each layer of the extracted three-dimensional data by contour lines;
An image surface level display step (S300) of displaying color levels for each layer separately for each contour line;
(S400) for converting the image surface level into a file compatible on the program to be reproduced so that the processed data can be subjected to section extraction, line extraction, and image extraction,
The three-dimensional data extraction step (SlOO)
A scanning step (S110) of scanning an image of an excavation site;
A matching step (S120) of matching the plurality of individually acquired scanning data to one absolute coordinate;
A conversion step (S130) of converting point data, which is initial raw data generated by matching, into polygon data through surface modification;
An area setting step (S140) of dividing the converted polygon data into a necessary part and an unnecessary part in the drawing to mesh structure;
A merging step (S150) of converting the data having undergone each mesh structure identification step into one data having one attribute;
An entire vertical and horizontal setting step (S160) of setting a vertical view by matching the vertical and horizontal values of the merged data to the coordinates;
(S170) a stereoscopic-view capturing step of extracting a flat surface and a stereoscopic view as a high-resolution image in accordance with a stereoscopic view for drawing;
And an image scale fitting step (S180) of matching the extracted high resolution image with the size of the actual object. The method of processing three-dimensional scanning data for archaeological survey and etch analysis.
3. The method of claim 2,
In the scanning step S110,
A three-dimensional laser scanner for scanning the shape of an object, and a three-dimensional scanning data processing method for archaeological investigation and archaeological analysis, wherein a scanning image is generated by a light wave interlocking with GPS to scan a wide area.
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