KR20030047324A - Apparatus and method for converting image map without any reference map - Google Patents

Abstract

PURPOSE: An apparatus and method for converting an image map without reference map are provided to easily select a warping point and directly input a reference point in the case that there are no conversion utility and reference map in converting a format between image maps. CONSTITUTION: An apparatus for converting an image map using no reference map includes an image map generator(31), an image file extractor(32), an image file register(33), and a warping processor(34). The image map generator receives an image map to be converted and generates an image map including lattice coordinates from the received image map. The image file extractor extracts image files from the image map to be converted and the image map including the lattice coordinates. The image file register temporarily resisters the extracted image file to be converted and the image file including the lattice coordinates in the format of an object image map. The warping processor overlays the registered image maps, sets intersection points of lattice lines as warping points and maps coordinate values to be converted to the warping points to perform warping process.

Description

Apparatus and method for converting image map without any reference map}

The present invention relates to an apparatus for converting a format between image maps, which is a form of geographic information system (GIS) data, and to a computer readable recording medium having recorded thereon a program for implementing the method. If no conversion utility is implemented, the conversion is done by registering an image map.

The most important task at the beginning of GIS data services, such as geolocation services, is data construction. In general, data format conversion is a costly and time-consuming task, even though it is less than the cost of deployment. The way to do this is being studied in various fields.

GIS applications, such as wireless network design systems, operate by overlaying different types of maps for the same area. To this end, it is necessary to transform the raw data into a format used in the wireless network design system during the initial construction process. However, data format conversion is a costly and time consuming task. Also, without a format conversion utility between the two systems, it would not be possible. In general, the image can be simplified by converting the image data excluding the header separately from the format conversion. That is, it can be registered as another system without a format conversion utility between the two systems.

Then, the general image map coordinate registration procedure and the problems that may occur during this process will be described.

Currently, there are many commercially available GIS platforms, each designed with its own data format for differentiation in system performance and functionality. Therefore, in order to operate GIS data for services in a GIS application implemented on such a platform, a task of converting a data format into a data format of an application platform is essential. In addition, since the GIS data format is dependent on the GIS platform in which the data is written, it can be said that N × (N-1) conversion programs are required to convert all kinds of GIS data into a desired GIS application program. However, due to performance and functional reasons, new standards continue to appear in the format of data, and thus, there is a limit to supplementing the conversion utility, and data conversion implies loss of information in nature, and thus perfect conversion is impossible. In addition, although data standardization work is in progress for efficiency of conversion work, it is not yet generalized.

The conventional format conversion method between image maps is performed through a conversion utility that implements a conversion rule from one format to another. If there is no conversion utility, the image file is registered. Looking at this in detail.

As illustrated in FIG. 1, an image map is generally configured in a form including header information including graphic information, map boundary information as a GIS map, coordinate system information, and the like. Therefore, to convert the data format from one system to another, if there is no conversion utility, the image file information 1b excluding the header information is extracted from the image map 1a of the A format to be converted, and the image of the new B format is extracted. The work can be performed by registering with the map 1c.

The general image map registration operation additionally requires a reference map 2b as shown in FIG. 2 and includes a warping operation to internally match the image file 2a with the reference map 2b. Warping is a technique of transforming an image map, which is used to convert a graphic image 2a into an image map 2c having a coordinate system, and is related to the warping point on an image and a reference point (mapping point) on a reference map. This is done by applying the generated equations to every point on the image. This method results in a procedure required for registering initial raw data and forcibly overlaying with other types of data, or in other cases, results of coordinate registration including errors. In addition, when the size of the leaf is large and it is necessary to select several warping points and mapping points, reworking is frequently performed by mistake. It may be included. On the other hand, the principle problem that it is impossible to work without a reference map is a problem that is difficult to apply realistically.

The present invention has been proposed in order to solve the above problems, and when the conversion utility and the reference map does not exist in the format conversion operation between image maps, it is easy to select a warping point and to directly input a reference point, It is an object of the present invention to provide an image map conversion apparatus capable of reducing the efficiency and the possibility of error propagation, and a method and a computer readable recording medium storing a program for realizing the method.

1 is an explanatory diagram showing a conventional image map conversion process.

2 is an explanatory diagram showing a process of converting an image map using a conventional reference map.

3 is a block diagram of an embodiment of an image map conversion apparatus according to the present invention;

4 is an exemplary explanatory diagram illustrating a process of converting an image map according to the present invention;

5 is a flowchart of an embodiment of an image map transformation method according to the present invention;

* Explanation of symbols for the main parts of the drawings

31: Image Map Generator 32: Image File Extractor

33: Image File Register 34: Warping Processor

The present invention for achieving the above object, Image map generation means for receiving an image map to be converted, to generate an image map including the grid coordinates in the image map to be converted; Image file extraction means for extracting an image file from the image map to be converted and the image map including the grid coordinates; Image file registration means for temporarily registering an image file to be converted and an image file including grid coordinates extracted by the image file extraction means in a format of a target image map to be converted; And warping processing means for performing a warping operation by setting the intersection point of the grid lines after the overlay of each registered image map as a warping point, and mapping coordinate values to be converted for each warping point.

The present invention provides a method of converting an image map that does not use a reference map, the method comprising: a first step of receiving an image map to be converted by the image map generator and generating an image map including grid coordinates from the image map to be converted; A second step of an image file extractor extracting image files from the image map to be converted and the grid coordinate containing image map, respectively; A third step of the image file register temporarily registering the image file to be converted and the image file including the grid coordinates extracted in the second step in a format of a target image map to be converted; And after the warping processor overlays each registered image map, sets an intersection point of the grid lines as a warping point, performs a warping operation by mapping coordinate values to be converted for each warping point, and then outputs the converted image map. Characterized by including four steps.

On the other hand, the present invention comprises a first function for generating an image map including the grid coordinates from the image map to be converted by the image map generator to the image map conversion apparatus having a processor; A second function that the image file extractor extracts an image file from the image map to be converted and the grid coordinate containing image map, respectively; A third function of temporarily registering an image file register in a format of a target image map to be converted by the image file to be converted and the image file including grid coordinates extracted by the second function; And after the warping processor overlays each registered image map, sets an intersection point of the grid lines as a warping point, performs a warping operation by mapping coordinate values to be converted for each warping point, and then outputs the converted image map. 4 Provide a computer-readable recording medium that records a program for realizing the function.

The present invention converts one format into another format without a reference map required during the registration process and a separate image map conversion utility, and solves an error problem occurring when selecting a warping point and a reference point during the image registration process. To achieve accurate image map conversion results without

To this end, the present invention generates a new image map including a grid line and coordinate values corresponding to each grid line at a predetermined distance in the image map processing system to be converted, and each image map is a general image without format information and coordinate information Convert to a file, temporarily register each image in the format of the target map you want to convert, set each converted image map to overlay points after overlay overlay grids, and map coordinate values to be converted for each warping point. To perform the warping algorithm.

Accordingly, the present invention can be used to convert the image map into a format and coordinate system suitable for the platform of the application program to serve the image map in various GIS application programs such as a wireless network design system and a location information service.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of an embodiment of an image map conversion apparatus according to the present invention.

As shown in FIG. 3, the image map conversion apparatus according to the present invention registers an image map without a reference map and a conversion program, receives an image map to be converted, and includes an image including grid coordinates in the image map to be converted. An image map generator 31 for generating a map, an image file extractor 32 for extracting an image file from an image map to be converted, and an image map including grid coordinates, and an image file extractor 32 for conversion. An image file register 33 for temporarily registering an image file and an image file including grid coordinates in the format of the target image map to be converted, and after each registered image map is overlaid, sets the intersection point of the grid lines as the warping point, It includes a warping processor 34 for mapping the coordinates to be converted to the ping point to perform a warping operation.

The image map generator 31 receives the image map to be converted and generates a new image map including grid coordinates. The image map generator 31 generates a grid line and coordinate values corresponding to each grid line at a predetermined distance from the image map to be converted. Create a new image map to include.

The image file extractor 32 extracts an image file from an image map to be converted and an image map including grid coordinates, and converts the image map to be converted and an image map including grid coordinates into a general image file without format information and coordinate information. Convert.

The image file register 33 performs initial registration in the conversion target image map format. In other words, the image file to be converted and the image file including the grid coordinates are temporarily registered in the format of the target image map to be converted.

The warping processor 34 performs a task of giving coordinate information suitable for the target image map format to the registered image map. That is, each registered image map is set to the intersection point of the grid after the overlay drawing as a warping point, and a warping operation is performed by mapping coordinate values to be converted for each warping point.

4 is an exemplary diagram illustrating an image map conversion process according to the present invention.

The conversion operation is performed with two image files 4c and 4d extracted from the image map 4b imaged by including the grid lines and the coordinate information in the image map 4a to be converted and the image map 4a to be converted. The two image files 4c and 4d are registered in the new image map format (4e). Since the image map has only coordinate information as an image map, it is usually registered in the form of the lower left contacting the coordinate axis during initial registration. Accordingly, the transformed resultant image map is obtained by selecting three or more warping points for mapping to the coordinate system of the target image map and inputting corresponding coordinate values on the new map to perform the warping operation (4f). This process will be described in more detail with reference to FIG. 5.

5 is a flowchart illustrating an embodiment of an image map conversion method according to the present invention.

As shown in FIG. 5, the image map conversion method according to the present invention first generates a new image map including grid lines and coordinate information representing coordinate information from a source image map to be converted in the image map generator 31 ( 501).

Thereafter, the image file extractor 32 extracts an image file from the source image map to be converted and the newly generated grid information-containing image map (502).

Next, the two image files extracted by the image file register 33 are registered in the conversion target image map format (503). In this case, the two maps are not yet registered coordinates. Accordingly, the warping processor 34 overlays and displays two image maps whose coordinates are not registered (504), and then selects three or more points among the intersection points of the grid lines displayed on the screen to use the warping reference coordinate values (505). .

Subsequently, a warping operation is performed using the coordinate information mapped one-to-one by inputting a coordinate value corresponding to the source image intersection as a mapping coordinate value for each warping reference coordinate value. In this case, if the coordinate system between the new image map and the source image map is different, the grid coordinate values generated on the source image map are transformed and used as mapping coordinate values (506 to 509).

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention enables data registration without an additional reference map in the image map conversion operation, thereby saving the amount of memory, cost, and time required for the data format conversion operation, and also does not use the reference map. In the registration method using a dot, it is possible to avoid problems of inefficiency and error propagation that may occur during the warping point and reference point selection process, and to guarantee a convenient and accurate conversion result.

Claims (9)

Image map generating means for receiving an image map to be converted and generating an image map including grid coordinates from the image map to be converted; Image file extraction means for extracting an image file from the image map to be converted and the image map including the grid coordinates; Image file registration means for temporarily registering an image file to be converted and an image file including grid coordinates extracted by the image file extraction means in a format of a target image map to be converted; And Warping processing means for performing a warping operation by overlaying each registered image map and setting intersection points of grid lines as warping points, and mapping coordinate values to be converted for each warping point. Image map conversion device that does not use a reference map that includes. The method of claim 1, The image map generating means, An image map converting apparatus that does not use a reference map by receiving an image map to be converted and generating a new image map including grid lines and coordinate values corresponding to each grid line at a predetermined distance from the image map to be converted. . The method of claim 1, The image file extracting means, And the image map to be converted and the image map including the grid coordinates are converted into a general image file without format information and coordinate information. The method according to any one of claims 1 to 3, The warping processing means, After overlaying two image maps that are not registered coordinates, select three or more points among the intersections of the grid lines that appear on the screen and use them as the warping reference coordinate values, corresponding to the source image intersection points for each warping reference coordinate value. Perform a warping operation using the coordinate information mapped one-to-one by keying the coordinate value as the mapping coordinate value. If the coordinate system between the new image map and the source image map is different, the grid coordinate value generated on the source image map is An image map conversion apparatus that does not use a reference map, wherein the coordinate conversion is performed to use the mapping coordinate value. In the image map conversion method that does not use a reference map, A first step of receiving, by the image map generator, an image map to be converted and generating an image map including grid coordinates from the image map to be converted; A second step of an image file extractor extracting image files from the image map to be converted and the grid coordinate containing image map, respectively; A third step of the image file register temporarily registering the image file to be converted and the image file including the grid coordinates extracted in the second step in a format of a target image map to be converted; And After the warping processor overlays each registered image map, sets the intersection point of the grid lines to the warping point, performs a warping operation by mapping coordinate values to be converted for each warping point, and then outputs the converted image map. step Image map conversion method that does not use a reference map that includes. The method of claim 5, The first step is, The image map generator receives the image map to be converted and generates a new image map including a grid line and coordinate values corresponding to each grid line at a predetermined distance from the image map to be converted. How to convert an image map. The method of claim 5, The second step, And the image file extractor converts the image map to be converted and the image map including the grid coordinates into a general image file without format information and coordinate information. The method according to any one of claims 5 to 7, The fourth step, After the warping processor overlays and displays two image maps without coordinate registration, it is used as a warping reference coordinate value by selecting three or more points among the intersections of grid lines appearing on the screen, and for each warping reference coordinate value, Input the coordinate value corresponding to the image intersection point as mapping coordinate value and perform the warping operation using the coordinate information mapped one-to-one. If the coordinate system between the new image map and the source image map is different, create it on the source image map. An image map conversion method using no reference map, characterized in that for converting the coordinates of the grid coordinates used as mapping coordinates. In an image map converter having a processor, A first function of receiving an image map to be converted by the image map generator and generating an image map including grid coordinates from the image map to be converted; A second function that the image file extractor extracts an image file from the image map to be converted and the grid coordinate containing image map, respectively; A third function of temporarily registering an image file register in a format of a target image map to be converted by the image file to be converted and the image file including grid coordinates extracted by the second function; And After the warping processor overlays each registered image map, sets the intersection point of the grid lines to the warping point, performs a warping operation by mapping coordinate values to be converted for each warping point, and then outputs the converted image map. function A computer-readable recording medium having recorded thereon a program for realizing this.