KR100545048B1 - System for drawing blind area in aerial photograph and method thereof - Google Patents

Abstract

The present invention relates to a closed area drawing system and method for aerial photography, and its object is to enable a detailed drawing of the closed area of the aerial photo model currently in operation.

The drawing system of the present invention for achieving this characteristic object, the input module 12 for receiving a plurality of duplicate photographed aerial photographs and facial expression information, camera information, and ground reference point information of each aerial photograph; And based on the inputted information, the aerial photograph information 40 is generated, the aerial photograph model is constructed, and based on the aerial photograph information 40, the ground coordinates extracted through the expression work for each aerial photograph model are converted into the ground coordinate DB. After reconstructing the model including the ground coordinates of the aerial photographic model (working model) currently in operation from the ground coordinate DB, the searched model (search model) is reorganized into a list and displayed to the operator through the output device. A control module 14; It consists of.

Aerial photography, closed area, drawing

Description

Closed area drawing system and method of aerial photography {SYSTEM FOR DRAWING BLIND AREA IN AERIAL PHOTOGRAPH AND METHOD THEREOF}

1A is an exemplary view showing a closed area of a conventional aerial photograph;

1B and 1C are exemplary views showing closed areas for aerial photographing positions;

2 is a block diagram showing a closed area drawing system of an aerial photo according to the present invention,

3 is an exemplary view showing a structure of aerial photograph information according to the present invention;

4 is an exemplary view showing the ground coordinates of the aerial photograph model;

5 is an exemplary view showing apprenticeship software according to the present invention;

6 is a flow chart showing a closed area drawing method of an aerial photo.

<Description of Symbols for Main Parts of Drawings>

10: drawing software 12: input module

14: control module 20, 30: aerial photograph model

40: Aerial photograph information B1, B2: Closed area

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing system and method using aerial photographs. In particular, a plurality of aerial photographs including a work position of the aerial photograph model currently being worked on are searched and displayed in a list form, thereby performing the aerial photograph model. The present invention relates to an aerial photography closed area drawing system and a method for enabling the drawing operation of a blind area of a vehicle.

Recently, there is a growing demand for various image information on objects in terms of the application of the Geospatial Information System (GIS). In particular, in building and road information systems, it is obvious that the utilization of 3D modeling data and 3D images of buildings and road facilities can be greatly increased.

In general, aerial photographs are mainly used to obtain 3D modeling and image information of an object.As aerial photographs are photographed by the origin projection method through a camera lens, a closed area is inevitably proportional to the height of a ground feature such as a building. Occurs.

More specifically, referring to FIG. 1A, when the aircraft continuously photographs an arbitrary region, a closed area B1 occurs in the aerial photograph at the photographing position P1, and a closed area B2 occurs in the aerial photograph at the photographing position P2. Illustrating the closed areas B1 and B2 of the aerial photograph according to the photographing position is as shown in FIGS. 1B and 1C. Many such closed areas exist on an aerial photograph (preferably a photographed image, which is called an aerial photograph model).

In general, in order to draw a closed area, detailed drawing of the area must be done by searching for the aerial photographs in which the closed area is three-dimensional and replacing the aerial photograph in which the closed area is shown. Therefore, it is obvious that worker fatigue is increased, and moreover, it is necessary to take time wasted due to the search and frequent replacement of aerial photographs in the closed area.

The present invention has been made to solve the above-mentioned problems, by searching for other aerial photographs including the current working position of the aerial photographic model currently in operation, creating them in a list form and showing them to the workers, The present invention provides a closed area drawing system and method for aerial photography, which enables detailed drawing operations of the closed area of a photographic model.

The drawing system according to the present invention for realizing such a technical concept, in the drawing system having the drawing software 10 for performing the drawing for the aerial photo, each of the plurality of photographed aerial photographs and each An input module 12 that receives facial expression information, camera information, and ground reference point information of the aerial photo; And, based on the input information to generate aerial photograph information (40), construct the aerial photograph model, based on the aerial photograph information (40) ground coordinates extracted through the expression work for each aerial photograph model ground coordinate DB After retrieving the model including the ground coordinates of the aerial photographic model (working model) currently in operation from the ground coordinate DB, the searched model (search model) is reorganized into a list and displayed to the operator through the output device. A control module 14; It includes.

On the other hand, the closed area drawing method according to the present invention comprises the steps of: (a) constructing an aerial photograph model from the photographed aerial photograph; (b) generating aerial photograph information 40 for the aerial photograph based on camera information, ground reference point information, and facial expression information used in photographing the aerial photograph; (c) performing an expression operation on each aerial photograph and an aerial photograph model using aerial photograph information, and constructing a ground coordinate DB for each aerial photograph model of the ground coordinate values extracted by the facial expression photograph; And (d) retrieving the aerial photograph model including the current work position from the ground coordinate DB, reconfiguring the list, and displaying the aerial photograph model to the operator. Is made of.

Preferably, a model (search model) including the midpoint coordinate value Px of the aerial photographic model currently being worked on is searched in the ground coordinate DB.

The aerial photograph information 40 according to the present invention, the image information 41 which is an identification number for the aerial photograph; Camera information 42 which is an identification number for a camera photographing the aerial photograph; Image rotation information 43 representing an angle with respect to the rotation state of the aerial photograph; Internal pointing point information 44 used when calculating the physical coordinate system of the camera from the pixel coordinate system of the aerial photograph; Cross-expression information 45 used for generating a stereoscopic model; Absolute expression information 46 used when calculating ground coordinates for the position on the aerial photograph; Angle unit information 47 which is a unit of angle used inside the aerial photograph; And external expression information 48, which is a constant of an equation used when calculating a ground coordinate value corresponding to an arbitrary position on the aerial photograph when the mutual expression and absolute expression work is completed.

Preferably, the aerial photograph model is processed three-dimensional images can be displayed to the operator.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It should be interpreted to mean meanings and concepts. In addition, when it is determined that the detailed description of the known function and its configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, it should be noted that the detailed description is omitted.

2 is a block diagram conceptually showing a closed area drawing system of an aerial photograph according to the present invention, which will be omitted in the following description, but all processing is performed by the drawing software 10, and disclosed in the present invention. It is desirable to understand that a series of drawing methods are included as part of the drawing software software 10.

Looking at the overall technical spirit of the present invention with reference to the drawings, spatial position values (surface coordinates) obtained through the facial expression (interaction and absolute expression) for a plurality of aerial photographic models 20 photographed in any area continuously Value) into a database (hereinafter 'ground coordinate DB'), search for other aerial photographs containing the working position of the aerial photograph model 32 currently in operation, and then list them (32, 34, 36, 38; 30) which is largely a series of processes offered to workers in the form.

As you know, the aerial photograph model consists of two photographs of duplicate photographs (stereoscopic photography). The aerial model used in the present invention is a device such as a polarizing screen (eg, Monitor ZScreen) and polarizing glasses (eg, CrystalEyes), or Patent No. 10-0493721 filed by the applicant, the numerical value of the invention The device disclosed in the Photogrammetry system can be shown to the operator in three-dimensional images.

Looking at the functionalization software 10 by function, the input module 12 for receiving the facial expression information, camera information, and ground point information of the aerial photograph and aerial photograph; And ground coordinate DB managed by the aerial photograph model to generate aerial photograph information based on the input information, construct an aerial photograph model, and extract ground coordinate values extracted through expression operations for each model based on the aerial photograph information. After retrieving the model including the ground coordinates of the aerial photographic model (hereinafter referred to as the 'working model') currently being worked on the ground coordinate DB, the searched model (hereinafter referred to as 'search model') is reconstructed into a list format. Control module 14 for displaying to the operator through the output device provided in the system; It consists of.

Here, the aerial photograph information 40, as shown in Fig. 3, the image information 41, which is an identification number for the aerial photograph, the camera information 42, which is an identification number for the camera photographing the aerial photograph, Image rotation information (43) representing the angle to the rotation state of the picture, internal coordinate point information (44), which is a variable used to calculate the physical coordinate system of the camera from the pixel coordinate system of the aerial photograph, and used to generate a three-dimensional model The mutual expression information 45 which is a variable to be used, the absolute expression information 46 which is a variable used when calculating the ground coordinates for the position on the aerial photograph, and the angle unit information indicating the unit of the angle used inside the aerial photograph ( 47) and the external expression information 48, which is a constant of the equation used when calculating the ground coordinate value corresponding to an arbitrary position on the aerial photograph when the mutual expression and absolute expression work is completed.

Referring to Figure 4 briefly look at the model search method using the ground coordinates of the current working model described above, the ground coordinates corresponding to the image edge end point (Pt1, Pt2, Pt3, Pt4) of the working model and these corners It contains any ground coordinates Px that fall within the endpoint's internal range. By searching this arbitrary ground coordinate value (Px) in the ground coordinate database, a matching model (search model) can be extracted. At this time, it is preferable that the ground coordinate value Px is a midpoint of Pt1, Pt2, Pt3, and Pt4. The present invention is not limited thereto.

An example of the functionality of the above described drawing software 10 is shown in FIG. Referring to the drawings, a list of models is formed in the form of a list (L1) at the upper left, the current work model 32 is shown at the center, and the models 34, 36, 38 are shown. In the upper right corner, the relationship between the current working model 32 and the search model 34, 36, 38 is formed in the form of a list (L2), and the search model (34, 36, 38) is located in the list (L3). ) Format.

As shown in FIG. 5, the closed area covered by the ground feature can be identified through the search models 34, 36, and 38 on the currently working work model 32, so that the detailed drawing of the closed area can be smoothly performed. Can be done.

Hereinafter, a method of drawing a closed area of an aerial photo using the system described above will be described. 6 is a flowchart illustrating a method of drawing a closed area of an aerial photo.

First, as described above, the control module 140 constructs an aerial photograph model from duplicate photographed aerial photographs (S610), inputs camera information, ground reference point information, and facial expression information used at the time of photographing (S620). As shown in FIG. 3, the aerial photograph information 40 is generated for the aerial photograph based on the information (S630).

Next, using the aerial photograph information generated for each aerial photograph, facial expressions (mutual expressions and absolute expressions) for each aerial photograph and aerial photograph model are performed, and the ground coordinates extracted by the facial expression photographs are extracted for each aerial photograph model. Configure the ground coordinate DB (S640). Here, the extracted ground coordinate values are constructed in a table form together with an identifier (ID) of the aerial photograph model and preferably include image information of the aerial photograph information. After the step is performed, as shown in the example of FIG. 5, the list L1 configured for each aerial photograph model is displayed to the operator, and the operator selects an item (work model) to be viewed from the list.

Before the selected work model is displayed to the operator in a stereoscopic image, the control module 140 includes a ground coordinate value Px corresponding to the current work position in the ground coordinate DB, more specifically, the midpoint coordinate value of the aerial photograph model. The model is searched (S650), the searched model (search model) is reconstructed into a list form (S660), and a working model and a stereoscopic image are processed and displayed as shown in FIG.

Through the above-described aerial photograph model construction and facial expression work, and displaying the current work model and the search model related thereto as a stereoscopic image, the closed area existing on the work model is identified at various angles through the search model. Since it is possible to, detailed drawing work for the ground feature of the closed area can be performed smoothly.

As described above and described with reference to a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as described above, it is a deviation from the scope of the technical idea It will be understood by those skilled in the art that many modifications and variations can be made to the invention without departing from the scope of the invention. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

According to the present invention as described above, since the ground feature of the closed area for the aerial photographic model (working model) currently in operation can be identified through a search model, it is possible to perform detailed drawing operations for the closed area smoothly. Has the effect of.

Claims (5)

A drawing system having a drawing software 10 for performing drawing for an aerial photo, the drawing system comprising: An input module 12 for receiving a plurality of aerial photographs photographed repeatedly and facial expression information, camera information, and ground reference point information of each aerial photograph; And, Based on the input information, the aerial photograph information 40 is generated, the aerial photograph model is constructed, and the ground coordinate DB extracted through the expression work for each aerial photograph model is based on the aerial photograph information 40. After retrieving the model including the ground coordinates of the aerial photographic model (working model) currently in operation from the ground coordinate DB, reconstructed the searched model (searching model) into a list form to the worker through the output device. A control module 14 for displaying; Closed area drawing system of aerial photographs comprising a. The method of claim 1, And a model (search model) including a midpoint coordinate value (Px) of the aerial photographic model currently being worked on in the ground coordinate DB. The method of claim 1, The aerial photograph model, Closed area drawing system, characterized in that the three-dimensional image processing is displayed. The method of claim 1, The aerial photograph information 40, Image information 41 which is an identification number for the aerial photograph; Camera information 42 which is an identification number for the camera photographing the aerial photograph; Image rotation information 43 representing an angle with respect to the rotation state of the aerial photograph; Internal pointing point information 44 used when calculating the physical coordinate system of the camera from the pixel coordinate system of the aerial photograph; Cross-expression information 45 used for generating a stereoscopic model; Absolute expression information 46 used when calculating ground coordinates for the position on the aerial photograph; Angle unit information 47 which is a unit of angle used inside the aerial photograph; And External expression information 48, which is a constant of an equation used to calculate a ground coordinate value corresponding to an arbitrary position on the aerial photograph when the mutual expression and absolute expression work is completed; Closed area drawing system of aerial photographs, characterized in that consisting of. In the method of drawing an aerial photo, (a) constructing an aerial photograph model from duplicate photographed aerial photographs; (b) generating aerial photograph information 40 of the aerial photograph based on camera information, ground reference point information, and facial expression information used in photographing the aerial photograph; (c) performing an expression operation on each aerial photograph and aerial photograph model using the aerial photograph information, and constructing a ground coordinate DB for each aerial photograph model by using the ground coordinate values extracted by the expression photograph; And (d) retrieving the aerial photograph model including the current work position from the ground coordinate DB, reconfiguring the list, and displaying the aerial photograph model to the operator; Closed area drawing method of aerial photo, comprising a.

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