KR101479220B1 - Terrain relief ortho image editing system for correcting error of reflection image - Google Patents

Abstract

The present invention relates to an image processing system capable of increasing the accuracy of a video image through error confirmation of shaded relief. According to an embodiment of the present invention, the image processing system includes a radar information database; a radar information confirmation unit; a shading source correction unit; an altitude confirmation unit; an eigenfrequency information confirmation unit; and an eigenfrequency information database.

Description

Technical Field [0001] The present invention relates to a system and a method for correcting an image of a shadow image,

The present invention uses shaded 2D geographical information provided from a geographic information database to create a shaded relief map so that a user can perceive the geometric shape like a real terrain, And more particularly, to a relief image processing system in which accuracy of a video image is enhanced through error checking of shading undulation.

The geographic information database is a database that stores numerical figures that are produced in the country and disclosed to each map maker. The numerical value (original degree) means that the altitude of the actual terrain is measured with reference to sea level or geoid, and the measured altitude is expressed as a contour line or an arbitrary numerical value, and the geographical information, It is a map in which various kinds of information are expressed.

The shaded relief means that only a part of the information to be provided to the user is represented in a large number of pieces of information such as contour lines or numerical values expressed in the numerical figure and the relief of the terrain represented by the numerical value is expressed by using the shading effect and / Dimensional (3D) terrain.

As a conventional method for producing a shaded relief pattern, for example, as disclosed in Japanese Patent No. 10-490670, a contour line on a two-dimensional basic diagram is generated as a vector image along a predetermined height, A shaded source generating step of generating a shaded source for representing a stereoscopic image by deforming information with vector data in correspondence with adjacent upper and lower vector images among the layers and mapping the geodetic map, distribution map, and terrain using the mapping technique A mapping source generation step of preparing a source to be mapped to the three-dimensional image by analyzing the data, creating a region for each texture by displaying the local distribution of the rock, the tree, etc. on the map and filling the source with the source; A ray that sets the ray to be constantly projected at an arbitrary angle so that the source is displayed on the three-dimensional terrain at a constant angle irrespective of the position or the topography Dimensional information such as mountain information, road information, and position information, which have been checked in advance, and information conversion for correcting the positional inconsistency of information generated when the two-dimensional information is converted into three- And a map completion step of completing a mountain 3D special map after correcting the positional discrepancy of the information.

However, as shown in Fig. 11, the shading relief generated by such a conventional method can be expressed by the relief of the terrain represented in two dimensions, the illumination represented by the relief of the terrain (for example, ), And the colors applied to the undulations of the terrain, it lacked the sense of life and realism.

In order to compensate for this, shading relief making techniques (Patent Registration No. 10-1004350, Publication Date 2010, 12, 28), which has improved usability, have been proposed.

However, since the contour lines used as the main elements for producing shaded relief in the evapotranspiration are formed by collectively connecting the same points to the closed curve, when the actual altitude is lower or higher, the contour line passes through the contour line, Ignored, the actual altitude was not represented in the shaded relief map.

As a result, there has been a limit in that the shaded relief produced by the prior art can not be different from the relief of the actual terrain.

Prior Art Document 1. Registration Patent Publication No. 10-1004350 (published on Dec. 28, 2010)

Accordingly, the present invention was invented to solve the above-mentioned problems, and it is an object of the present invention to provide a method and system for verifying whether or not an actual landform can be expressed in a shaded relief, To provide a relief image processing system that enhances the accuracy of a video image through the image processing apparatus.

According to an aspect of the present invention,

A method for acquiring a panoramic image from a geographic information database storing a panorama of an arbitrary object topography expressing an ups and downs of two-dimensional contour lines of an arbitrary target terrain to generate a shading relief represented by a three-dimensionally elevation difference of the terrain, The closed curves by the contour lines are extracted, and the closed curve by the contour line of the lowest altitude is given a dark shade having a first brightness of black, and the closed curve by the highest altitude contour line is given a bright shade having a second brightness of white A basic shade source generating unit for generating a basic shade source giving a shade having a lightness between the first lightness and the second lightness at a contour line between the minimum altitude and the highest altitude; A three-dimensional terrain type generating unit for generating a three-dimensional terrain shape having a bottom portion as a bottom portion and a higher brightness as the brightness is closer to the second brightness according to a brightness of each portion of the basic shade source; A screen shade source generating unit for generating a screen shade source by inverting the brightness of the basic shade source; Wherein the contour of the three-dimensional terrain is less transmitted as the brightness of the screen shading source is higher and the contours of the three-dimensional terrain as the brightness of the screen shading source is lower, A screen shaded source synthesizing unit which allows the screen shaded source to be transmitted; And a shaded relief generating unit for converting the stereoscopic terrain synthesized by the screen shaded source into a two-dimensional image photographed from a time point at which the synthesized terrain is disposed at any position in the three-dimensional space to generate the shaded relief degree. In this case,

A lattice information database for storing lattice information of the ground undulation for the correction of the screen dark source,

An eigenfrequency information database for storing eigenfrequency information for altitude confirmation at a point where the eigenfrequency transmitter is installed for correcting the screen shadow source,

An altitude detection unit for measuring an altitude of an installation point and setting a corresponding natural frequency designated for each altitude, a lidar signal detection unit for detecting a lidar signal, a GPS coordinate determination unit for measuring GPS coordinates of installed points, A natural frequency transmitter comprising a natural frequency transmitter unit for transmitting the natural frequency and GPS coordinate information in response to the LIDAR signal detection of the LIDAR signal detection unit,

A natural frequency receiver for receiving the natural frequency and GPS coordinate information, integrating the natural frequency and the GPS coordinate information into the natural frequency information, and storing the natural frequency information and the GPS coordinate information in the natural frequency information database,

A section in which an upper layer contour line and a lower layer contour line are spaced apart from each other by a predetermined distance or more in the original diagram of the screen shadow source is checked and the Lada information on the section is searched and confirmed in the Lada information database, A ladder information verifying unit for checking whether a predetermined height or a predetermined depth is undulated or not, and setting the section as a relief occurrence region when undulation is confirmed; An eigenfrequency information check unit for searching eigenfrequency information corresponding to the undulation occurrence area in the eigenfrequency information database; An altitude confirmation unit for confirming a natural frequency of the searched natural frequency information to confirm a specified altitude and setting a GPS coordinate point for the natural frequency as a natural frequency transmission point; Wherein a plurality of boundary lines are formed by dividing the upper and lower layer contour lines of the undulation occurrence area at predetermined intervals to link the respective altitudes to each other, The closed curve of each elevation is formed until it meets the boundary line of the same altitude. In the same altitude boundary line and altitude closed curve, A shade source correction unit which divides a portion of the displayed image into a display portion and an erased portion and applies a brightness corresponding to the altitude to the display portion,

, Which is a relief image processing system that enhances the accuracy of a video image through error checking of a shaded undulation.

According to the present invention, shading undulation can be corrected by confirming ground undulation for an arbitrary region that is missing in the conventional shading undulation, thereby achieving more accurate and reliable shading relief.

FIG. 1 is a block diagram showing an embodiment of a relief image processing system according to the present invention,
FIG. 2 is a flowchart sequentially illustrating a shaded relief pattern generation process based on the relief image processing system according to the present invention,
FIG. 3 is a diagram sequentially illustrating a process of fabricating shaded reliefs based on the relief image processing system according to the present invention,
FIG. 4 is a flowchart illustrating a method of imparting a shading effect to a three-dimensional terrain in the relief image processing system according to the present invention,
5 is a flowchart illustrating a method of applying a color source in an undulation image processing system according to the present invention,
FIG. 6 is a flowchart illustrating a method of adding various information to a three-dimensional terrain in which a screen shadow source is synthesized in an undulation image processing system according to the present invention,
FIG. 7 is an image showing an example of a basic shade source generated from a circle and a circle processed by the relief image processing system according to the present invention,
FIG. 8 is an explanatory view for explaining the arrangement of an illumination source in a three-dimensional space in the relief image processing system according to the present invention,
FIG. 9 is an image showing an example of a three-dimensional terrain in which a color source and a color source generated through the relief image processing system according to the present invention are overlapped with a three-dimensional terrain synthesized with a screen shading source,
FIG. 10 is an image showing an example of a three-dimensional terrain on which two-dimensional information and two-dimensional information prepared from an original are projected,
11 is an image showing the shaded relief produced by the conventional method,
12 is a block diagram showing a natural frequency transmitter and a natural frequency receiver according to the present invention,
13 is a block diagram showing a shadow source correction apparatus according to the present invention,
FIG. 14 is a diagram schematically showing an embodiment of a relief image correction by the relief image processing system according to the present invention,
FIGS. 15 and 16 are views schematically showing the correction of the natural frequency transmission point according to the shadow source correction in FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It will be possible. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In addition, the present invention utilizes a part of the system configuration of the above-described Japanese Patent Application No. 10-1004350. Therefore, some of the features of the device configuration described below are those described in Japanese Patent Registration No. 10-1004350.

Therefore, the device structure, characteristics, and operation relationship described below will be referred to as the contents of the above-mentioned Japanese Patent Application No. 10-1004350, and the structure related to the main features of the present invention will be described in detail in a part of the detailed description .

For reference, the relief image processing system according to the present invention includes a shading source correction device 30 (see FIG. 1), a natural frequency information database 50, a natural frequency transmission device 61 reinforced in the prior art 10-1004350, , A natural frequency receiver (62), and a lidar information database (40), and further comprises a screen shading source correction step (SB) in which the components are driven. The constituent elements will be schematically referred to in the description with reference to the drawings, and a detailed description will be described in detail starting from the description with reference to Fig.

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

FIG. 1 is a block diagram showing an embodiment of an undulation image processing system according to the present invention. 1, the relief image processing system according to the present invention comprises a geographic information database 10 and a shaded relief pattern production apparatus 20. Particularly, the shaded relief pattern production apparatus 20 includes a basic shade source generation unit A three-dimensional terrain generation unit 23, a screen shade source generation unit 24, a shade synthesis unit 25, and a shaded relief generation unit 26. The three-

The undulation image processing system according to the present invention further includes a shade source correction device 30 for checking and correcting the error of the screen shade source, A database (40) and an intrinsic frequency information database (50), a natural frequency transmitter (61) provided on the ground to transmit a natural frequency, And a natural frequency receiver 62 for storing the natural frequency.

The geographic information database 10 is a database that stores the basic maps published by the National Geographic Society. In the geographical information database 10, various information such as road information, geological information, environmental information, and the like are digitized and stored. This information is represented numerically on a map that is produced in a vertically downward view from the air. Such a two-dimensional map containing information represented by a numerical value is called a numerical map. Hereinafter, it is referred to as " circle. &Quot;

The basic shade source generation unit 22 in the shaded relief map production apparatus 20 receives the original map from the geographic information database 10 and then uses the contour lines shown on the original map to represent the target landmarks shown on the original map as 3 Create a default shade source to represent as a dimension. The basic shading source is widely used for producing a general three-dimensional solid figure, and a method of generating it will be briefly described as follows.

First, each closed curve by a plurality of contour lines is extracted from the original plane. At this time, the contour line must have the form of a closed curve, but it is preferable to assume the contour of the original plane as a contour line and complete the closed curve at the portion cut by the edge of the original plane.

Then, the lowest altitude and the highest altitude are checked with reference to the respective extracted contour lines, and dark shading having a first brightness of black, for example, is given inside the closed curve by the contour line having the lowest altitude, In the closed curve by the contour line, for example, a bright shade having a second brightness of white is given, and a contour line for one or more of the altitudes disposed between the lowest altitude and the highest altitude includes black (first brightness) And generates a basic shade source by giving a shade of a gray scale having a brightness between white (second brightness).

On the other hand, with respect to a plurality of intermediate altitude contour lines disposed between the lowest altitude and the highest altitude, the brightness is set to be gradually increased from a low altitude (low altitude) to a high altitude It should be displayed in an increasingly brightening form at a higher altitude.

When a shaded source is created in this manner, the shadows assigned to one of the contour lines and the contours adjacent to the contour lines appear in a stepped form since the contour lines are usually displayed in units of 10 m or 20 m. However, if a shadow source is created in this step-like form, the three-dimensional terrain to be formed by using the shade source (the basic shade source) appears as an unnatural form of a staircase shape. Therefore, it is necessary to naturally change the brightness of the shade between each contour line have.

To this end, a shade source is generated by a method as shown in Fig. 3 is a diagram illustrating a process of generating a basic shade source. First, one of the contour lines (the low-level contour line) and the high-level contour line disposed immediately inside this low-level contour line are selected, and each contour line is made into a vector image. Then, a virtual layer having a large number of height values is created between the low-level contour lines and the high-level contour lines of the vector image, and a shade having brightness between the brightness set in the low-level contour lines and the brightness set in the high-

In other words, if the low-level contour line is selected as 100m contour line and the elevation contour line is selected as 110m contour line, 100m contour line is set to 40% and the 110m contour line is set to 30% 10 contour lines can be virtually set between 110m contour lines in units of 1m height difference, and shading can be applied to each contour line with decreasing brightness by 1%. That is, the brightness is set so that the 101m contour line is set to 39% and the 102m contour line is linearly decreased to 38%.

Although we have described setting up 10 virtual contour lines between low and high elevation contour lines and high elevation contour lines, by setting the number of hundreds or more, it is possible to further reduce the step shape of the shadow source, It becomes possible to create a shade source (basic shade source) whose brightness gradually changes naturally to the shade of the contour line.

The three-dimensional terrain generation unit 23 generates the terrain targeted by the basic shade source in a three-dimensional manner in a virtual three-dimensional space using the generated basic shade source. In other words, a three-dimensional terrain having a shape in which the first lightness portion represented by black in the basic shade source is set as the bottom surface and the second lightness portion expressed in white is normal and the lightness increases as the brightness value increases.

In addition, the three-dimensional terrain generation unit 23 includes a function of giving a shadow effect due to virtual lighting to the three-dimensional terrain generated by the basic shade source.

The shadow effect is obtained by disposing an illumination source at an arbitrary position in a virtual three-dimensional space generating a three-dimensional terrain and irradiating a light beam having an arbitrary color and brightness toward the three-dimensional terrain, To represent the shadows that occur in the.

At this time, the illumination source can be assumed to be the sun on the actual target terrain, but a plurality of illumination sources may be set so that the undulation of the terrain in the shading relief can be well represented.

The screen shading source generating unit 24 generates a screen shading source using the basic shading source generated by the basic shading source generating unit 22. [ The screen shadow source is created by simply reversing the brightness of the primary shadow source.

The shading synthesis unit 25 synthesizes the screen shading source with the three-dimensional terrain generated by the basic shading source.

The screen shadow source is thus created by simply inverting the brightness of the primary shadow source, but performs a function completely different from that of the primary shadow source, which creates a three-dimensional topography that rises or falls depending on the brightness. That is, the screen shadow source plays a role of making the contour of the three-dimensional terrain clear and blurred according to the brightness value of each area. More specifically, mapping a screen shadow source to conform to the shape of a three-dimensional terrain, and as the portion of the screen shadow source has a higher lightness, the contour of the solid terrain is transmitted less and the lower the brightness of the screen shadow source, Transparent. As a result, high altitude terrain looks sharp, low altitude terrain looks blurry or invisible.

At this time, the combination of the three-dimensional topography and the screen-shading source is performed in such a manner that the color (or brightness) of an arbitrary area of the three-dimensional terrain is mapped to the area Of the three-dimensional terrain, and setting the arbitrary area to the whole of the three-dimensional terrain and performing a corresponding calculation.

As described above, according to the process of synthesizing the screen shadow source to the three-dimensional terrain, the two-dimensional information (to be described later) displayed on the three-dimensional terrain is more clearly expressed, ) To complete the shaded relief map, the terrain becomes more lively and realistic. In addition, the shading synthesis unit 25 may include a function of applying a certain color to a three-dimensional terrain to which a screen shading source is applied.

For this purpose, the shade combining unit 25 can receive a color source from the outside. The color source may be produced by the maker himself or by an additional color source generator (not shown) in the shaded relief generator 20 according to an exemplary embodiment of the present invention, One result can be applied.

The color source is an arbitrary color given to every closed curve by the contour lines of the original plan, and overlaps with the three-dimensional topography so that the altitude of the three-dimensional topography can be visually reliably expressed. At this time, the overlapping of the color sources is performed in such a manner that the color (or brightness) of an arbitrary area of the three-dimensional terrain is mapped to the color of the area corresponding to the arbitrary area in the mapped color source after the screen dark source is mapped to the three- And setting the arbitrary area to the whole of the three-dimensional terrain and performing corresponding calculation.

By applying the color of the color source to the three-dimensional terrain after applying the screen shadow source as described above, the color of the three-dimensional terrain can be expressed clearly without being distorted by the illumination light or the like. That is, in the conventional shading relief, the color source is applied to the three-dimensional terrain generated by the basic shading source, and then the shadow effect is given by illumination. According to such a process, there is a problem that a portion having a strong shadow effect has a different color due to a color source. However, by applying the color source after all the lighting effects (shadow effects) are applied as in the present invention, it is possible to prevent the color distortion as in the conventional method.

The shaded relief map generator 26 combines a screen shaded source to show a highly elevated terrain clearly and a terrain of low altitude to a blurry or invisible shape of a three dimensional terrain at an arbitrary position in a virtual three dimensional space Dimensional image of the viewed form from the placed viewpoint. This two-dimensional image is a shaded relief map expressing only the ups and downs of the terrain in the form in which additional geographic information is excluded.

The shaded relief map generation unit 26 projects two-dimensional information including trail information, road information, and terrain position information previously surveyed on the target terrain before converting it into a two-dimensional image, And corrects the positional inconsistency caused by the projection onto the three-dimensional three-dimensional terrain.

Thus, a two-dimensional image is generated using the three-dimensional terrain on which the two-dimensional information is projected, thereby completing the shading relief in which various information is expressed.

Next, a description will be made of a method for fabricating a shaded relief map by the shaded relief patterning system according to an embodiment of the present invention as described above. The details of each step can be understood with reference to the above-mentioned description.

FIG. 2 is a flowchart sequentially illustrating a process of fabricating shaded reliefs based on the relief image processing system according to the present invention. First, the shaded relief map generator prepares the original map from the geographic information database 10, extracts contour lines from the prepared original map, and creates a basic shaded source (S20). An example of the diagram is shown in FIG. 7A, and an example of the basic shadow source generated from the diagram can be understood with reference to FIG. 7B.

The basic shade source is used to generate the three-dimensional terrain (S30), and the screen shading source generated using the basic shade source is synthesized with the generated three-dimensional terrain (S40, S50). One example of the three-dimensional topography generated by the basic shading source is shown in Fig. 7C, one example of the screen shading source can be referred to 7d, and a three-dimensional topography in which the screen shading source is synthesized appears as shown in Fig. 7e.

Subsequently, the three-dimensional terrain in which the screen shadow source is synthesized is photographed by a virtual camera disposed at an arbitrary point in the three-dimensional space and converted into a two-dimensional image to generate a shading relief (S60).

FIG. 3 is a diagram sequentially illustrating a process of fabricating shaded reliefs based on the relief image processing system according to the present invention. In FIG. 3, a dark shadow is given to a closed curve by one of the low- And a relatively bright shade is imparted to the closed curve by the < RTI ID = 0.0 >

3, a virtual contour line is set between the low-level contour line and the high-level contour line, and shadows are given so that the brightness changes sequentially to each virtual contour line.

The lower part of FIG. 3 shows a state in which a shade source expressed by a brightness changing smoothly by the above-described virtual contour lines is generated.

FIG. 4 is a flowchart illustrating a method of assigning a shadow effect to a three-dimensional terrain in the relief image processing system according to the present invention. It is desirable that the shadow effect is given immediately after creating the three-dimensional terrain by the primary shading source. That is, when a three-dimensional terrain is generated by the three-dimensional terrain generation step of FIG. 2 (S31), an illumination source is arranged at an arbitrary position in the three-dimensional virtual space including the three- A shadow effect is applied to the three-dimensional terrain (S33). At this time, one or more illumination sources may be arranged. The arrangement of the illumination sources in the three-dimensional space as shown in Fig. 4 can be understood with reference to Fig.

5 is a flowchart illustrating a method of applying a color source in a relief image processing system according to the present invention. The color source of FIG. 5 is overlapped after step S50 of FIG. 2 is performed. First, in FIG. 5, a color source is generated in a color source generating unit by applying a predetermined color according to the altitude using a closed curve by a contour line of the original plane (S51). One example of the generated color source can be referred to FIG. 9A. Subsequently, the generated color source is overlapped with the synthesized three-dimensional terrain (S52) so that the three-dimensional terrain is colored. One example of a stereoscopic topography in which color sources are overlapped is shown in Fig. 9B.

For example, the color source may be set so that a different color is assigned to each 50 m contour line as a boundary, so that the difference in height can be easily distinguished by color. Or may be generated in a color gradually changing from the lowest altitude area to the highest altitude area.

By overlapping the color source after step S50 as described above, after the shadow effect by the illumination light is already applied to the three-dimensional terrain, the color is clipped, and the distortion of the applied color can be minimized.

FIG. 6 is a flowchart illustrating a method of adding various information to a three-dimensional topography in which a screen shading source is synthesized in the undulation image processing system according to the present invention. Actually, in order to utilize the shaded relief according to the embodiment of the present invention, the user must visually express the road, the structure, the vegetation, the geological structure, and the like formed on the target terrain as well as the terrain shape. Therefore, characters, symbols, figures, colors, etc. representing such information must be expressed on a shaded relief map. On the other hand, such information can be extracted and generated from the original plan.

This information, that is, the two-dimensional information extracted from the original plane, is projected onto the three-dimensional terrain to which the screen shading source is applied (S55 and S56), and whether the two-dimensional information projected by the producer of the shading relief is projected and displayed at the correct position (S57).

One example of two-dimensional information prepared from the original plane is shown in Fig. 10A, and an example of a three-dimensional terrain in which two-dimensional information is projected is shown in Fig. 10B.

The shaded relief map constructed with the above description is based on only the contour lines formed on the original plan so that the brightness is applied to each altitude. Therefore, some of the shaded relief planes may be slightly different from the actual terrain. In order to compensate for this, it is necessary to check whether there is an error in a part of the shadow source, and to correct the shadow in the part where the error is confirmed. The relief image processing system according to the present invention reaffirms the uphill information on the actual terrain and proceeds to correct the shadow source based on the relief information.

For this purpose, the undulation image processing system according to the present invention generates a screen shading source as shown in FIG. 2, checks whether the shading source correction is necessary (SA), and performs shading source correction if necessary ).

In addition, the shaded source correction apparatus 30 configured in the relief image processing system according to the present invention searches the LAD information database 40 for the LAD information for the corresponding terrain, confirms the terrain, And confirms the accurate altitude of the position based on the natural frequency of the natural frequency transmitter 61 installed at the position. Subsequently, the shadow source is corrected on the basis of the undulation determined by the above-described process, thereby finally completing the screen shadow source.

A more detailed description of the above-mentioned contents will be given in more detail while explaining each component.

FIG. 12 is a block diagram illustrating a natural frequency transmitter and a natural frequency receiver according to the present invention. Referring to FIG.

The natural frequency transmitting device 61 is installed at the highest point or the lowest point of the area where the undulations occur, unlike the other points, by the person in charge who collects the terrain information by directly visiting each area on the ground. More specifically, the contour lines shown on the circle can be understood as merely sloping sections. Actually, there may be protruded areas or sloping sections without sloping sections in the corresponding section. The person in charge installs the natural frequency transmitting device 61 at the highest position or the lowest position of the area showing the terrain.

The inherent frequency transmitter 61 includes an altitude sensing unit 611 for sensing a currently installed altitude and setting a natural frequency corresponding to the altitude, a ladder signal sensing unit 612 for sensing a ladder signal, A natural frequency transmitting unit 614 for confirming the detection of the LADIR signal of the signal detecting unit 612 and transmitting the natural frequency set by the altitude detecting unit 611 and a GPS receiving unit And a GPS coordinate confirmation unit 613 for processing the GPS coordinate information together with the unique frequency originating unit 614 to transmit the unique frequency.

The altitude detection unit 611 confirms the altitude of the point at which the altitude detection unit 611 is installed, and sets the altitude at the altitude. More specifically, the undulation image processing system according to the present invention corrects the shadow source by confirming the undulation of the terrain, so that the eigenfrequency originating device 61 checks the eigenfrequency transmitted from the eigenfrequency transmitter 61, ) Is installed. For this purpose, the altitude of the natural frequency transmitter 61 should be identified from the natural frequency. Therefore, altitude is designated for each natural frequency, and when the natural frequency is received, the designated altitude is immediately confirmed. For reference, since the technique for measuring the altitude with respect to the current position is a publicly known technology that has been widely known, a detailed description of the altitude sensing unit 611 will be omitted.

The radar signal detecting unit 612 detects a radar signal generated in the aerial surveying process so that the natural frequency transmitting unit 614 can perform a calling operation. It is preferable that the natural frequency transmitting device 61 can not continuously transmit the natural frequency and only transmits the natural frequency when the requirement is satisfied. In the present invention, the above-mentioned requirement is a signal detection with a Lada signal, and a natural frequency is transmitted when a Lada signal is detected. For reference, the radar signal detection unit 612 allows the natural frequency transmitter 61 to operate only when it detects a ladder signal of a predetermined intensity or more, so that the airborne aircraft is within a certain range from the natural frequency transmitter 61 When it comes close, make sure to send the natural frequency.

The GPS coordinate confirming unit 613 confirms the GPS coordinates of the point where the present natural frequency transmitting device 61 is installed and transmits the confirmed GPS coordinates to the airborne surveying aircraft together with the operation of the natural frequency transmitting unit 614. [ Since the GPS coordinate confirming unit 613 is the same as the general GPS coordinate system, a detailed description of the operation principle and structure of the GPS coordinate confirming unit 613 will be omitted.

The natural frequency transmitting unit 614 transmits the specified natural frequency according to the signal of the LIDAR signal detecting unit 612 and also transmits the GPS coordinate information transmitted from the GPS coordinate confirming unit 613. [ The natural frequency transmission is performed for a predetermined time, so that an aircraft passing over the natural frequency transmission device 61 can correctly receive and confirm the natural frequency.

The natural frequency receiving device 62 receives the natural frequency and GPS coordinate information transmitted from the natural frequency transmitting device 61 and integrates the received natural frequency and GPS coordinate information into the natural frequency information and stores the natural frequency information in the natural frequency information database 50.

FIG. 13 is a block diagram illustrating a shadow source correction apparatus according to the present invention. FIG. 14 is a diagram schematically illustrating an embodiment of a shadow source correction performed by the relief image processing system according to the present invention, .

The shadow source correction apparatus 30 according to the present invention includes a ladder information confirmation unit 31 for searching for and confirming Lada information in a ladder information database 40 and an intrinsic frequency information database 50 for searching for intrinsic frequency information An intrinsic frequency information confirming unit 32 for confirming the intrinsic frequency information, an altitude confirming unit 33 for ascertaining the altitude of the region in the intrinsic frequency information, a shade source correction unit 33 for calibrating the shade source based on the ladder information, Unit 34 as shown in FIG.

The ladder information confirming unit 31 searches the ladder information database 40 for the area in order to check whether there is undulations between the contour lines having a predetermined interval or more as shown in Fig. 14 (a). As is well known, the Lidar measurement technique is a common technique for measuring the undulation of the ground in the aerial surveying process. Therefore, if the contour line extending over a certain interval is found in the original plan, the Lidar information between the contour lines is checked, It is possible to confirm whether or not there is undulation exceeding a certain height based on the altitude. The lidar information confirmation unit 31 confirms whether or not the ladder information is undulated and selects the area as a 'relief occurrence zone' if the undulation of a certain height or more or a certain depth or more is detected based on the ground surface.

The natural frequency information verifying unit 32 searches natural frequency information database 50 for natural frequency information for the area when the ladder information verifying unit 31 confirms the 'undulation occurrence area'. Since the natural frequency information includes GPS coordinate information, which is the position coordinate of the corresponding natural frequency transmitting device 61, the natural frequency transmitting device (not shown) installed in or around the ' 61), and marks the position as a "natural frequency originating point".

The altitude confirmation unit 33 confirms the altitude of the 'natural frequency originating point' from the natural frequency included in the natural frequency information. As described above, since the natural frequency is specified differently according to the altitude, the altitude determination unit 33 can confirm the altitude of the 'natural frequency originating point' from the natural frequency.

The shade source correction unit 34 applies the corresponding brightness in consideration of the brightness of the upper layer contour and the lower layer contour line of the " natural frequency dispatching point " when the altitude confirmation unit 33 confirms the altitude of the ' .

FIG. 15 and FIG. 16 are diagrams schematically illustrating the correction of a natural frequency originating point according to the shadow source correction of FIG. 14, and the correction process of the screen shadow source will be described in more detail with reference to FIG.

In Fig. 15, three "natural frequency transmission points (a1, a2, a3)" are confirmed at an altitude of the upper layer contour line of 80 m and an altitude of the lower layer contour line of 70 m. As a result of checking the elevation of the natural frequency originating points (a1, a2, a3) based on natural frequencies, the altitudes of a1 and a2 were 78 m and the height of a3 was 74 m, respectively. Since the natural frequency transmission points a1, a2 and a3 are identified by the natural frequency transmission device 61 installed at the highest or lowest point in the area by the person in charge, the natural frequency transmission points a1 and a2 , a3) 'corresponds to the highest point or the lowest point in any range between the upper contour line and the lower contour line.

On the other hand, the interval between the upper contour and the lower contour line is inclined at an angle of 80 m, which is the altitude of the upper contour line, to 70 m, which is the altitude of the lower contour line. Therefore, the shade source correction unit 34 divides the upper layer contour line and the lower layer contour line at regular intervals, and forms an arbitrary boundary line so as to border the divided section. In the embodiment of the present invention, the upper contour line and the lower contour line are divided into five equal parts, and the height difference between the four boundary lines is made 2 m.

Subsequently, the shade source correction unit 34 forms a 'closed curve at each altitude' concentric around the 'origin frequency points a1, a2 and a3' at regular intervals, and the corresponding altitude Of the 'altitude curve'. For example, in the embodiment of the present invention, since the altitude difference between the boundary line and the altitude curve of the altitude is equal to 2 m, a 'natural frequency transmitting point' of a1 is displayed up to a second concentric circle having an altitude of 76 m , the 'natural frequency originating point' of a2 is displayed up to the third concentric circle with an altitude of 74m, and the 'natural frequency originating point of a3 is displayed up to the second concentric circle with an altitude of 76m. In addition, the closed curve of the altitude corresponding to the boundary line is divided into 'deletion part' and 'indication part' according to the boundary line according to the 'natural frequency origin point'.

The shading source correction unit 34 corrects the screen shading source by applying a contrast to the 'display portion' of the 'altitude closed curve' thus formed. For reference, 'closed curve of altitude' is formed at intervals of 2m. Therefore, the brightness applied to the upper layer contour line of 80m and the brightness applied to the lower layer contour line of 70m are divided into 5 parts, and the brightness corresponding to the height of the closed curve of 'altitude' do.

When the correction for the screen shadow source is completed, the shaded relief generation unit 26 finally completes the shade relief based on the screen shadow source corrected by the shadow source correction apparatus 30. [

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, 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 (1)

A method for acquiring a panoramic image from a geographic information database storing a panorama of an arbitrary object topography expressing an ups and downs of two-dimensional contour lines of an arbitrary target terrain to generate a shading relief represented by a three-dimensionally elevation difference of the terrain, A closed curve by a contour line of the lowest altitude is given a first brightness of black, a closed curve by a highest altitude contour line is given a second brightness of white, and the lowest altitude and the highest A basic shade source generating unit for generating a basic shade source to which a shade having a brightness between the first lightness and the second lightness is imparted to a contour line between the altitudes formed between the altitudes; A three-dimensional terrain type generating unit for generating a three-dimensional terrain shape having a bottom portion as a bottom portion and a higher brightness as the brightness is closer to the second brightness according to a brightness of each portion of the basic shade source; A screen shade source generating unit for generating a screen shade source by inverting the brightness of the basic shade source; Wherein the contour of the three-dimensional terrain is less transmitted as the brightness of the screen shading source is higher and the contours of the three-dimensional terrain as the brightness of the screen shading source is lower, A screen shaded source synthesizing unit which allows the screen shaded source to be transmitted; And a shaded relief generating unit for generating a shaded relief by converting the stereoscopic terrain synthesized by the screen shaded source into a two-dimensional image photographed from a time point at which the synthesized terrain is disposed at any position in the three-dimensional space As a result,
A lattice information database for storing lattice information of the ground undulation for the correction of the screen dark source,
An eigenfrequency information database for storing eigenfrequency information for altitude confirmation at a point where the eigenfrequency transmitter is installed for correcting the screen shadow source,
An altitude detection unit for measuring an altitude of an installation point and setting a corresponding natural frequency designated for each altitude, a lidar signal detection unit for detecting a lidar signal, a GPS coordinate determination unit for measuring GPS coordinates of installed points, A natural frequency transmitter comprising a natural frequency transmitter unit for transmitting the natural frequency and GPS coordinate information in response to the LIDAR signal detection of the LIDAR signal detection unit,
A natural frequency receiver for receiving the natural frequency and GPS coordinate information, integrating the natural frequency and the GPS coordinate information into the natural frequency information, and storing the natural frequency information and the GPS coordinate information in the natural frequency information database,
A section in which an upper layer contour line and a lower layer contour line are spaced apart from each other by a predetermined distance or more in the original diagram of the screen shadow source is checked and the Lada information on the section is searched and confirmed in the Lada information database, A ladder information verifying unit for checking whether a predetermined height or a predetermined depth is undulated or not, and setting the section as a relief occurrence region when undulation is confirmed; An eigenfrequency information check unit for searching eigenfrequency information corresponding to the undulation occurrence area in the eigenfrequency information database; An altitude confirmation unit for confirming a natural frequency of the searched natural frequency information to confirm a specified altitude and setting a GPS coordinate point for the natural frequency as a natural frequency transmission point; A plurality of boundary lines are formed by dividing the upper contour line and the lower layer contour line of the undulation occurrence area at regular intervals to link the respective altitudes, The closed curve of each elevation is formed until it meets the boundary line of the same altitude. The closed curve of altitude at the same altitude boundary line and altitude closed curve which are encountered by each other shows the boundary line according to the natural frequency source point. A shade source correction unit which divides a portion of the displayed image into a display portion and an erased portion and applies a brightness corresponding to the altitude to the display portion,
Wherein the image processing apparatus further includes an overturning image processing system for enhancing the accuracy of the image through error checking of shading undulation.

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