JP3859794B2 - Photo shooting management method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a photogrammetry method for construction objects, and more particularly to a photography management method for facilitating photography plans and photography at construction sites and managing each data of the photography process.
[0002]
[Prior art]
In conventional photogrammetry, objects to be measured such as topography at a construction site are photographed (stereo photography) from two different points in the ground space, and the three-dimensional coordinates of the object to be measured are obtained based on the photographed images. The three-dimensional shape information and the three-dimensional model of the object to be measured are created by calculation. First, an operator determines photographing conditions such as a plurality of photographing positions suitable for three-dimensional measurement of a photographing device such as a camera and an object to be measured at a construction site. At this time, a ground control point device indicating a ground control point such as a plurality of reference points whose ground coordinates are known and a plurality of points (pass points) captured in common for two images to be captured in stereo is installed in advance. The Then, a plurality of measurement models composed of two images taken in stereo are selected from the photographed photographic images, and the measurement model is subjected to orientation analysis based on a pass point on the photographic image, and then the measurement object is measured. A three-dimensional model of the object to be measured was created by calculating three-dimensional coordinates.
[0003]
[Problems to be solved by the invention]
However, in the conventional photogrammetry, the operator sets not only the shooting location and shooting direction suitable for stereo shooting, but also the installation of a ground control point device by predicting that the orientation analysis will be performed from the captured image. Because it is necessary to determine the location, the worker is required to have detailed knowledge and experience about the photography method. In the above photogrammetry, the management of information on the photographic equipment, image data, etc. is managed for each process, and when the worker makes various preparations before work, the worker must save the files of the previous and subsequent processes. Since it had to be taken out and carried out, there was a drawback that work efficiency was poor. In addition, although a procedure for stereo shooting is almost established, no method has been proposed for a general worker to easily determine the shooting position and direction.
[0004]
The present invention was made in order to solve the above problems, and a general operator can easily determine the shooting position and direction, and further manages the stereo imaged digital image data in a database, It is an object of the present invention to provide a photography management method that allows an operator to efficiently manage the image data.
[0005]
[Means for Solving the Problems]
In the photography management method according to claim 1 of the present invention, after a topographical map of a construction site is read into a computer and image data of a plan view of the construction site is created, a plurality of stereo shootings are performed on the image data. A 3D background image data is obtained by instructing a shooting position and a shooting direction, and further inputting a rough terrain to be measured using a 3D CAD input function provided in the computer, and obtaining 3D background image data from the 3D background image data. Each of the three-dimensional simulation images assuming the case where the worker has taken images from a plurality of photographing positions designated on the plan view is created, and these assumed three-dimensional simulation images are displayed side by side. this where the shooting direction is whether it is a shooting position and shooting direction suitable for stereo photography, and be able to see before making a photo taken at a construction site The features.
[0006]
The photography management method according to claim 2 of the present invention displays the control point installation location designated by the worker on the plan view on the three-dimensional simulation image, and two two-dimensional simulations designated by the worker. It is characterized in that it is determined whether or not the image includes a preset number of control points, and whether or not the two images are appropriate as a measurement model.
[0007]
The photography management method according to claim 3 of the present invention enables the three-dimensional simulation image data to be replaced with actual image data after the actual photography is performed, and further, the actual image data is obtained from the photographing position and the photographing. It is characterized in that it is registered and stored in a database together with shooting point information such as direction and measurement information such as orientation point data.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a photography management apparatus 1 according to the present embodiment. A topographic map at a construction site, a camera model used for photography, a lens focal length, and the like are input to the photography management apparatus 1. Input means 2, photographing plan management means 3 for generating photographing point information such as a photographing position and a photographing direction based on various data inputted to the input means 2, and output data of the photographing plan management means 3 A control unit 5 including an imaging plan simulation unit 4 that takes in a rough terrain to be measured and performs a planned arrangement of reference points, a database 6 that stores various data such as the input data and the imaging point information, and a display 7. The printer 8 is provided.
In this embodiment, a personal computer having a CAD function is used as the control means 5 and a keyboard and a scanner are used as the input means 3. The actual image data DP photographed by the digital camera is directly input to the database 6 and registered / saved.
[0009]
Next, a method for managing the shooting plan at the construction site by the photo shooting management apparatus 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. This image data is background image data for simulating a shooting plan and measurement accuracy. In order to set the coordinate system for the background image data, the point P ₁ (X ₁ , Y ₁ ) and the point P ₂ (X ₂ , Y ₂ ) and the point P ₁ whose ground coordinates are known in the topographic map are shown. , P ₂ , using the coordinate data of the point p ₁ (x ₁ , y ₁ ) and the point p ₂ (x ₂ , y ₂ ) on the background image data, and the coordinate system on the image, The Hellmartt conversion coefficient, which is a conversion coefficient for performing the coordinate conversion, is calculated. The coordinates of an arbitrary point p (x, y) in the background image data can be converted into ground coordinates (X, Y) using the Helmat transform coefficient.
[0010]
Next, the operator inputs the camera model and lens focal length used for shooting to the shooting management means 4, and then on the background image data, as shown in FIG. 3, the shooting position (marked with □ in the figure). And the shooting direction (arrow in the figure) are set. Since the background image data has only been inputted with two-dimensional information, the rough terrain to be measured, for example, a pit, as shown in FIG. 4, using the three-dimensional CAD input function provided in the personal computer. enter the z-coordinate of the glue shoulders K ₁ Yanori Ass K ₂ in part to create a three-dimensional background image data. In addition, an auxiliary line L can be input to make the terrain screen easier to understand. Further, as shown in FIG. 4, by designating the control point device positions such as reference points and pass points as indicated by the black symbols Δ, the placement plan of the control point devices can be simultaneously performed on the background image data. it can. In the background image data in which the shooting position, shooting direction, orientation point device position, and the like as shown in FIG. 5A are set, when the operator selects a shooting position indicated by, for example, 012, A three-dimensional simulation image assuming an image taken from the shooting position 012 by a camera having lens focal length data is created by the shooting plan simulation means 4, and the display screen of the display 7 as shown in FIG. Are displayed in the window W012. Further, on the window screen W012, information on the shooting convergence angle, the basic shooting length, and the expected measurement accuracy is sequentially displayed for the purpose of confirming whether or not the specification of the shooting position and shooting direction is appropriate. .
[0011]
FIG. 6 is an example of a display screen in which three-dimensional simulation images from the respective photographing positions 011 to 014 and 031 to 034 designated by the operator are sequentially arranged. The worker refers to these three-dimensional simulation images and actually Determine the shooting position and shooting direction at the construction site, and take a picture with a digital camera at the construction site. The photographing plan simulation means 4 detects whether or not the two three-dimensional simulation images designated by the operator include a preset number of control points, and whether the two images are appropriate as a measurement model. Since the determination result is displayed to the worker, even a worker without specialized knowledge can appropriately determine the shooting position and the shooting direction. Further, the three-dimensional simulation image is registered and stored in the database 6 linked to the photographing conditions of the camera used, etc., and is replaced with actual image data of a digital camera photographed at an actual construction site after photographing.
Further, the above three-dimensional simulation image is output from the printer 8 of the photography management apparatus 1 together with a plan view in which the photography position and the photography angle are entered as shown in FIG. can do.
[0012]
Thus, according to the present embodiment, a 3D simulation image of the shooting site can be created before taking a photo at the construction site, and a shooting plan can be made while referring to the 3D simulation image. Even an operator with little knowledge or experience of photogrammetry can perform appropriate stereo shooting. Further, the database 6 is registered with photographic equipment information such as camera information and photographing point information such as a photographing position in addition to the three-dimensional simulation image or the actual image, so that even when the worker is changed. Can easily take over the work.
[0013]
In the above example, the shooting plan at the stage where the actual image of the construction site is not registered in the database 6 has been described. 1 can be used to support the shooting plan. That is, orientation analysis is performed based on a plurality of real images registered in the database 6, measurement data of the contour display of the construction site as shown in FIG. 7 is created, and new excavation is performed on the measurement data. While inputting a plurality of three-dimensional coordinates of the location and using the background image data already registered in the database 3 as the background, and using the three-dimensional CAD input function as in the above embodiment, FIG. Create a schematic topographic map of the measurement target as shown in In addition, the area | region R enclosed with the dotted line of the figure is a location which performed the new excavation mentioned above. Next, the placement plan of the ground control point device is also instructed by instructing the placement of the ground control point device on the screen, and 3 of the construction site where the new excavation is performed by the same operation as the above embodiment is performed. A three-dimensional simulation image is displayed on the display 7, and the photographing position and photographing direction at the actual construction site are determined with reference to the three-dimensional simulation image, and a photograph is taken at the construction site.
[0014]
【The invention's effect】
As described above, in the photography management method according to claim 1, the topographical map of the construction site is read into the computer to create the image data of the top view of the construction site, and then the stereo photography is performed on the image data. 3D background image data is obtained by instructing a plurality of shooting positions and shooting directions and inputting a rough terrain to be measured using a 3D CAD input function provided in the computer. Each of the three-dimensional simulation images that are assumed to be taken from a plurality of photographing positions designated by the operator on the plan view is created from the image data, and the assumed three-dimensional simulation images are displayed side by side, and designated as described above. Since it is now possible to check whether the shooting position and shooting direction are the shooting position and shooting direction suitable for stereo shooting, 3D simulation images at the shooting site can be referred to before shadowing, so that an operator with little knowledge or experience of photogrammetry can easily make a shooting plan and perform appropriate stereo shooting. .
[0015]
The photography management method according to claim 2 displays the location of the orientation point device specified by the operator on the plan view on the 3D simulation image, and two 3D simulation images specified by the operator are displayed. Judgment is made as to whether or not a preset number of ground control points are included, and the above two images are judged as appropriate as a measurement model, so even an operator with little knowledge or experience in photogrammetry can easily It is possible to make a plan for the placement of the ground control device at the shooting site.
[0016]
According to a third aspect of the present invention, there is provided a photography management method that allows the three-dimensional simulation image data to be replaced with actual image data after actual photography has been performed. Since it is registered and stored in the database together with the measurement information such as the shooting point information and the control point data, it is possible to easily take over the photo shooting work even when the worker is changed.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a photography management apparatus according to an embodiment of the present invention.
FIG. 2 is a topographic map of a construction site according to the embodiment of the present invention.
FIG. 3 is a diagram showing a setting example of photographing points according to the embodiment of the present invention.
FIG. 4 is a diagram showing an arrangement example of a ground control point device according to an embodiment of the present invention.
FIG. 5 is a diagram showing an example of a three-dimensional simulation image for photographing according to an embodiment of the present invention.
FIG. 6 is a diagram showing a display example of a shooting point on a background image data and a three-dimensional simulation image according to the embodiment of the present invention.
FIG. 7 is a diagram showing an example of contour measurement data at a construction site where excavation according to the embodiment of the present invention has progressed.
FIG. 8 is a diagram showing a setting example of a photographing point and a control point device at a construction site where excavation according to an embodiment of the present invention has progressed.
[Explanation of symbols]
1 photography management apparatus 2 input means 3 shooting plan manager 4 shooting plan simulation means 5 control means 6 database 7 display 8 actual image data K ₁ glue shoulder K ₂ glue butt printer DP digital camera

Claims (3)

After reading the topographic map of the construction site into the computer and creating image data of the floor plan of the construction site, on the above image data, instruct the multiple shooting positions and shooting directions for stereo shooting, and further to the above computer A 3D background image data is obtained by inputting a rough terrain to be measured using a 3D CAD input function provided, and a plurality of shooting positions designated by the operator on the plan view from the 3D background image data. 3D simulation images that are assumed to have been shot from each other are created, and these assumed 3D simulation images are displayed side by side, and the specified shooting position and shooting direction are suitable for stereo shooting. A photography management method characterized in that it is possible to check whether or not it is before taking a picture at the construction site .   The orientation point device installation location designated by the operator on the plan view is displayed on the 3D simulation image, and the two 3D simulation images designated by the operator include a preset number of orientation points. 2. The photography management method according to claim 1, wherein whether or not the two images are appropriate is determined as a measurement model.   After the actual photographing is performed, the three-dimensional simulation image data can be replaced with actual image data, and the actual image data is further measured using photographing point information such as photographing position and photographing direction and measurement information such as orientation point data. The photography management method according to claim 1 or 2, characterized in that it is registered and stored together with a database.

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