JPH10246629A - Photographing control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a photographing control method in which a pass point in a measuring model can be specified easily and in which even an ordinary operator can analyze an orientation by a method wherein right and left digital image data to be used as the measuring model are displayed by increasing their luminance with reference to the pass point on a display screen. SOLUTION: By an automation support means for orientation analysis, a measuring model K01 which is composed of a left photograph and a right photograph at a construction site selected by an operator, e.g. an image 011 and an image 012, is displayed on screens of a display. Pass points in the images 011, 012 are discriminated automatically by the automation support means on the basis of the luminance of pixels on the reflection seal of a pass-point device so as to be displayed as circular luminous dots 5 on the screens. The operator selects, from both screens, pass points which correspond to each other and which are supposed to be identical, and he inputs them to a control means. Thereby, on the basis of a plurality of sets of designated pass points, the automation support means semiautomatically performs a relative orientation, an absolute orientation or the like so as to be displayed on the screens of the display. The operator can perform the mapping operation of the pass points according to its interaction, and even an ordinary operator can analyze an orientation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for managing a measurement system and a database for facilitating three-dimensional measurement of a construction object by photogrammetry.
The present invention relates to a photography management method for performing orientation analysis using image data of a digital camera.

[0002]

2. Description of the Related Art In a conventional photogrammetric method, an object to be measured, such as the topography of a construction site, is photographed from two different points in the ground space (stereo photographing), and based on the two photographed images taken above. The three-dimensional coordinates of the object to be measured are calculated, and the three-dimensional coordinates of the object to be measured are calculated.
Dimensional shape information and a three-dimensional model were created. At the construction site, a control point indicating device indicating control points such as a plurality of reference points whose ground coordinates are known and a plurality of points (path points) which are commonly photographed by two images photographed in stereo is installed in advance. . An operator specifies each control point of the two images (referred to as a measurement model) photographed in the stereo, determines a relative positional relationship at the time of photographing the two images (mutual position), and further determines the position. Determine ground coordinates of fixed points (ground orientation)
I do. Then, from the relationship between the coordinate system on the image and the ground coordinate system determined by the orientation work, it is possible to obtain three-dimensional coordinate data of each position of an object to be measured on the image. Also, perform the above work for multiple measurement models,
A three-dimensional model (construction model) of the construction site can be created by joining the three-dimensional data of the measured object obtained from each measurement model.

[0003]

However, in the conventional photogrammetry method, project information such as a camera to be used, a focal length of a lens, photographing point information such as a photographing position and a photographing direction, a photograph name, a photo control point measurement data, and the like. Since the stereo model information and the like are individually managed in files, when the operator performs orientation analysis, the operator has to take out each file in the previous process and perform it, which has a disadvantage that the work efficiency is poor. . Although the orientation analysis work requires specialized knowledge, the work procedure itself can be hijacked by an established method. Since the point information and the stereo model information are not linked and managed, there is a problem that it is difficult to select the information, and it is difficult for ordinary workers to perform the orientation analysis work.

The present invention has been made to solve the above problems, and manages digital image data obtained by stereo photographing in a database, and manages various data throughout photogrammetry based on the data. It is an object of the present invention to provide a photographing management device that can easily and efficiently perform orientation analysis based on the image data, project information, photographing point information, and stereo model information.

[0005]

According to a first aspect of the present invention, there is provided a photographing management method, comprising: using a digital camera, stereoscopically photograph an object to be measured including a photo control point; and acquiring a series of digital images obtained by the photographing. A method of performing data orientation analysis, in which various data of the above-mentioned photographing and other work processes are linked to the digital image data and stored in a database, and two pieces of digital image data serving as a measurement model are displayed on a display screen. In this case, the control point is characterized in that the control points on the display screen are characterized by increasing the brightness and displayed.

According to a second aspect of the present invention, there is provided a photographing management method for inspecting a result of orientation analysis, and when there is an abnormal point in the analysis result, the abnormal point is displayed on a display screen by another normal point. It is characterized in that the control points are characterized and displayed. Inspection of the result of the orientation analysis is performed semi-automatically by using a personal computer or the like to program a conventional inspection procedure such as an index residual inspection and a mutual orientation vertical parallax.

According to a third aspect of the present invention, there is provided a photographing management method according to the present invention, wherein after the orientation analysis is completed, the orientation analysis result is obtained by acquiring the imaging point information such as the imaging position and the imaging direction and the orientation data and the measurement range. It is characterized in that it is registered and stored in a database together with measurement information.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a photographing management device 1 according to the present embodiment, and an input unit 2 for inputting a camera model and a lens focal length used for photographing to the photographing management device 1. A photographing management means 3 for generating photographing point information such as a photographing position and a photographing direction on the basis of various data inputted to the input means 2, a model name,
Orientation analysis management means 4 that generates stereo model information such as left and right photograph numbers and orientation point measurement data, and performs analysis such as mutual orientation and ground orientation from observation data, and detects and outputs abnormal points for each analysis. A control means 6 having an automatic support means 5 for orientation analysis, a database 7 for storing various data such as the input data and photographing point information, and a display 8 are provided. In the present embodiment, a personal computer having a CAD function is used as the control means 6, and a keyboard and a scanner are provided as the input means 2. The real image data DP captured by the digital camera is directly input to the database 7 and registered and stored.

Next, a method of managing a photographing plan by the photographing management device 1 will be described. First, before taking a photograph of the construction site, a topographic map of the construction site to be measured is read into a personal computer using a scanner, and image data of a plan view of the construction site as shown in FIG. 2 is created. Also,
Rough terrain to be measured, for example, shoulder K at pit
Type ₁ Yanori z-coordinate of the butt K ₂ to create a three-dimensional background image data. In addition, an auxiliary line L can be input to make the screen of the terrain easier to understand. This image data is background image data for performing a simulation of a shooting plan and measurement accuracy. For the background image data, a coordinate system corresponding to ground coordinates is set. Next, the model of the camera to be used for shooting and the focal length of the lens are input. On the background image data, as shown in FIG. 3, the shooting position (square in FIG. 3) and shooting direction (arrow in FIG. 3). Set. Further, by instructing the arrangement of the control points such as the reference points and the pass points, the arrangement plan of the control points (black triangles in the figure) can also be performed. When the operator selects a photographing position, the photographing plan management means 3 calculates a three-dimensional simulation image assuming that the photographing is performed from the designated photographing position with the camera having the input used camera and the lens focal length data. As shown in FIG. 4, the shooting plan displayed on the display 8 is displayed in the window W on the set background image data.

[0010] The operator determines the actual photographing position and photographing direction at the construction site with reference to the plurality of three-dimensional simulation images created in this manner, and performs photographing with a digital camera at the construction site. Do. The three-dimensional simulation image is registered and stored in the database 7, and after photographing, is replaced with actual image data of a digital camera taken at an actual construction site. At the time of taking a photograph of the construction site, a control point device that indicates a control point such as a pass point or a reference point is provided at the construction site with reference to the three-dimensional simulation image. This control point device includes:
A reflective seal is provided at the center, and serves as a guide for determining a coordinate position on the actual image data of the photographed digital camera.

In the orientation analysis, as shown in FIG. 5, two adjacent images are used as one measurement model from the actual image data of a plurality of digital cameras registered in the database 7, and the two images are used for each measurement model. The image coordinates of the photo control points common to the image of FIG. The orientation analysis management means 4 is based on project information such as camera information and orientation point data registered in the database 7 and shooting point information such as image data, and stereo models such as model names, left and right photograph numbers, and orientation location measurement data. Information is generated, and the stereo model information is transferred to the automation support means 5 for orientation analysis. At this time, the two images serving as the measurement models are automatically selected by the orientation analysis management unit 4 based on the photographing point information registered in the database 7.

As shown in FIG. 6, the orientation analysis automation support means 5 displays left and right photographs of the construction site selected by the operator, for example, a measurement model composed of images 011 and 012 on the display screen of the display 8. . Orientation points in the displayed images 011 and 012 are automatically identified by the orientation analysis automation support means 5 based on the brightness of the pixels of the reflection sticker of the orientation point device, and as shown in FIG. Is displayed as a circular bright spot (point S in the figure). The operator selects corresponding control points which are considered to be the same from the two screens and inputs them to the control means 6. Control means 6
The automatic location analysis support means 5 semi-automatically performs a series of operations such as mutual orientation and ground orientation based on a plurality of designated orientation points. The operator may associate the above-mentioned orientation points according to the instructions of the orientation support automation means 5 displayed on the display screen of the display 8. As described above, the stereo model information is also transferred to the known support points 5 of the known reference points and pass points of the three-dimensional ground coordinates. For example, it is automatically associated with the control point by the automation support means 5 of the control analysis. Therefore, the operator can easily and efficiently perform the orientation analysis based on the image data, the project information, the photographing point information, and the stereo model information. Furthermore, in the measurement at a place where no sign or the like is installed, for example, at the measurement of a pass point or a tie point, the operator is guided to which point to measure the point such as the pass point or the tie point. For this purpose, as shown in FIG. 6, a rectangular frame is displayed on the image to support the calculation.

Each time the above-mentioned orientation analysis is completed, the orientation analysis management means 4 checks each of the index residual, the vertical disparity of the mutual orientation, and the reference point residual of the course adjustment, and verifies the analysis result. I do. For example, when the mutual orientation analysis is completed, the analysis result list R of the mutual orientation and the measurement model (images 011 and 01) are displayed on the display screen of the display 8 as shown in FIG.
2) is displayed. As a result of the analysis, if there is an abnormal point, the photo control point (bright point on the screen) on the image determined to be abnormal flashes and the operator visually recognizes the correction point to prompt the correction. I have. When the operator selects the flashing control point, the measurement point position in the list is highlighted, so that the operator can reset the control point and perform the mutual control analysis again. The abnormal point may be a case where the automation support means 5 displays reflected light from other than the control point as a control point, and the worker mistakes the correspondence of the control point, or a case where the worker specifies the control point incorrectly. However, the orientation analysis management means 4 checks the abnormal point each time each analysis is completed, confirms the analysis result, and prompts the operator to correct the abnormal point. You can do it.

When the orientation analysis is completed, the analysis results and the various orientation parameters calculated are added to the stereo model information in the database 7 and registered and stored. Therefore, the database 3 is linked with the measurement model image composed of the two images, and is linked and registered with photographing device information such as camera information, photographing point information such as a photographing position, and stereo model information such as the measurement range of the model. The next measurement model can be selected automatically. Further, even when the workers are changed, the work can be easily taken over. In the present embodiment, the rating points on the display screen are displayed as circular bright spots on the screen, but may be displayed in an easily recognizable shape or color such as a yellow circle or a square. In addition, although the display of the abnormal point is displayed by blinking, the abnormal point may be displayed by characterizing the normal evaluation point as a yellow circle and the abnormal point as a red circle.

[0015]

As described above, according to the photographing management apparatus according to the first aspect, the object to be measured including the control points is stereo-photographed by using the digital camera, and a series of digital images obtained by this photographing are obtained. A method for orientation analysis of image data, in which various data of the above-mentioned photographing and other work processes are linked to the digital image data and stored in a database, and two digital image data serving as measurement models are displayed on a display screen. In doing so, the control points on the display screen are characterized by increasing the brightness etc. and displayed.
A general worker can perform the orientation analysis based on the various data, and can easily identify the orientation points on the measurement model. In addition, since the next measurement model can be automatically selected, the analysis work becomes easy.

According to the second aspect of the present invention, the result of the orientation analysis is inspected, and if there is an abnormal point in the analysis result, the abnormal point is displayed on the display screen as another normal point. Since the characteristic control points are characterized and displayed, the control points to be corrected can be easily specified and corrected, so that the control analysis can be performed reliably.

According to the third aspect of the present invention, after the orientation analysis is completed, the orientation analysis result is taken together with the imaging point information such as the imaging position and the imaging direction and the measurement information such as the orientation point data and the measurement range. Since the data is registered and stored in the database, the next measurement model can be automatically selected, thereby facilitating the analysis work. Further, even when the workers are changed, the work can be easily taken over.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a photographing management device according to an embodiment of the present invention.

FIG. 2 is a topographical map of a construction site according to the embodiment of the present invention.

FIG. 3 is a diagram illustrating a setting example of a shooting point, a control point, and the like according to the embodiment of the present invention.

FIG. 4 is a diagram showing an example of a three-dimensional simulation image of photographing according to the embodiment of the present invention.

FIG. 5 is a diagram illustrating a display example of actual image data by a digital camera and a photographing point according to the embodiment of the present invention.

FIG. 6 is a diagram showing an example of a measurement model according to the embodiment of the present invention.

FIG. 7 is a diagram showing a display example of an abnormal point on a measurement model according to the embodiment of the present invention.

[Explanation of symbols]

1 photography management apparatus 2 input means 3 shooting plan manager 4 locating analysis management unit 5 automated support unit 6 control unit 7 Database 8 display DP actual image data K ₁ glue shoulder K ₂ glue butt Digital Camera orientation analysis

Continued on the front page (72) Inventor Mami Ishiguchi 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo Head Office (72) Inventor Osamu Uchida 4-2-118 Shinjuku, Shinjuku-ku, Tokyo Asia Air Survey Co., Ltd. Inside

Claims (3)

[Claims] 1. A method for stereo-photographing an object to be measured including a photo-control point using a digital camera, and performing a photo-location analysis of a series of digital image data obtained by this photo-taking. In addition to linking the data with the digital image data and saving it in the database, when displaying two digital image data as a measurement model on the display screen, the characteristics such as increasing the brightness with respect to the control points on the display screen are provided. A photographing management method, wherein the photographing management method is performed. 2. A method of inspecting the result of the orientation analysis, and when there is an abnormal point in the result of the analysis, the abnormal point is displayed on the display screen by characterizing other normal orientation points. 2. The photographing management method according to claim 1, wherein: 3. After the orientation analysis is completed, the orientation analysis result is registered and stored in a database together with photographing point information such as a photographing position and a photographing direction and measurement information such as the orientation point data and a measurement range. The photographing management method according to claim 1 or 2, wherein