JP3808159B2 - Photo shooting management method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a measurement system and a database management method for facilitating 3D measurement of a construction object by photogrammetry, and in particular, 3D coordinate data of a construction site is obtained from a stereo imaged digital image. The present invention relates to a photography management method to be calculated.
[0002]
[Prior art]
In conventional photogrammetry, an object to be measured such as topography at a construction site is photographed (stereo photography) from two different points in the ground space, and the object to be measured is based on the two photographed images. Three-dimensional coordinates are calculated, and three-dimensional shape information and a three-dimensional model of the object to be measured are created. In the construction site, a ground control point device showing ground control points such as a plurality of reference points whose ground coordinates are known and a plurality of points (pass points) photographed in common with two images (referred to as measurement models) to be photographed in stereo. Is installed in advance. The operator takes a photograph with a digital camera at the construction site, identifies the orientation points on the images of the respective measurement models, performs mutual orientation analysis of the orientation points, and further determines the coordinates of the orientation points on the image and the ground coordinates. Is determined (ground orientation). Then, three-dimensional coordinate data of each position of an arbitrary object on the measurement model can be obtained from the relationship between the coordinate system on the image and the ground coordinate system determined by the orientation point analysis operation.
[0003]
[Problems to be solved by the invention]
However, in conventional photogrammetry, project information such as camera used, lens focal length, etc., shooting point information such as shooting position and shooting direction, and stereo model information such as photo name and orientation point measurement data are individually managed as files. Therefore, when obtaining the three-dimensional coordinate data, the operator has to take out each file of the previous process and perform the operation, and there is a disadvantage that the work efficiency is poor. Further, the work for obtaining the three-dimensional coordinate data requires specialized knowledge, and there is a problem that it is difficult for a general worker to obtain the three-dimensional coordinate data based on the measurement model.
In addition, several methods have been proposed to automatically obtain 3D coordinate data using matching techniques, etc., but it is necessary to manage the shape of breakline data such as the shoulders and the butt of each one It was not possible to efficiently measure important points together.
[0004]
The present invention has been made to solve the above-described problem, and manages stereo imaged digital image data in a database, manages various data over the entire photogrammetry based on the data, and finishes the control point analysis. It is an object of the present invention to provide a photography management method that enables an operator to easily and efficiently obtain three-dimensional coordinate data about an object to be measured of each measurement model.
[0005]
[Means for Solving the Problems]
The photography management method according to claim 1 of the present invention is based on a series of digital image data of an object to be measured such as the topography of the construction site, which is stereo-photographed from the ground including the construction site and its surroundings using a digital camera. A method of selecting two stereo-photographed images to be a measurement model, performing orientation analysis, and obtaining three-dimensional data to be used for construction management, wherein each of the photographed image data and the standard of each of the image data is obtained. fixed point measurement data, various data working process of the stereo model information or the like, such as obtained orientation points analysis results by orientation analysis as well as stored in a database, displayed on the display screen based on the stored scan Tereomoderu information, glue ass on two pictures forming a measurement model, when you calculate the 3-dimensional coordinate data of the region along the breakline such glue shoulder, the display Entered by tracing the breakline at the surface, characterized in that to calculate the three-dimensional coordinate data of the area based on the segment information of the break lines which are the input.
[0006]
The photography management method according to claim 2 of the present invention is used when the trace area of one image of the traced measurement model is narrow and the point information for calculating the three-dimensional coordinate data of the area is insufficient. Based on the stereo model information of the two images registered in the database, the point where the point information is deficient is generated and the position of the two images is determined. And the measurement range of the two pieces of image data is made uniform.
[0007]
In the photography management method according to claim 3 of the present invention, when there are overlapping measurement points common to three or more images, a plurality of measurement models are selected by selecting two images from each of the images. set at each measurement model performs orientation analysis to calculate respectively the 3-dimensional coordinate data of the common measurement point, by comparing the 3-dimensional coordinate data the calculated, in the plurality of measurement models It is characterized by verifying the measurement result at the same time.
[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 the configuration of a photography management apparatus 1 according to the present embodiment. Input means 2 for inputting a measurement range for measuring three-dimensional data of an object to be measured to the photography management apparatus 1. A database 3 for storing various data of work processes such as stereo model information such as construction site image data photographed with a digital camera, orientation point measurement data and orientation point analysis results of the image data, Based on the stereo model information, 3D measurement information management means 4 for generating 3D measurement information such as a 3D measurement range and 3D information such as 3D coordinate data, and a stereo model based on the traced line segment information The control means 6 provided with the measurement data verification means 5 which applies a measurement result to another photograph, and verifies measurement data simultaneously, and the display 7 are provided. The actual image data of the digital camera taken at the actual construction site and stored in the database 3 is subjected to orientation analysis based on stereo model information such as orientation point measurement data, and the result of the analysis is again converted to the stereo model information. It is added and stored in the database 3.
[0009]
The operation of the photography management apparatus 1 having the above configuration will be described.
When the operator designates a course name (for example, course 01 and course 03) of image data for calculating three-dimensional coordinate data from the construction site image by using the input device 2, the course is displayed on the display 7 as shown in FIG. The digital image inside is displayed. The operator selects left and right images (for example, image 011 and image 012) that are measurement models for measuring the three-dimensional coordinate data from the images. The three-dimensional measurement information management means 4 takes in the image data of the designated images 011 and 012 of the construction site and the orientation point analysis result from the database 3, and associates the coordinate values with the orientation points on each image, As shown in 3 (a) and (b), the displacement correction images of the measurement areas M ₁ and M ₂ are calculated from the original image taken by the digital camera. The displacement corrected image is obtained by rearranging images according to epipolar geometry using the relative orientation elements from the original image data, and the right image corresponding to the orthogonal measurement mesh m ₁ of the orthogonal system of the left image 011. The measurement mesh m ₂ of the image 012 is a distorted mesh to which correction corresponding to the difference in shooting position between the left image 011 and the right image 012 is added.
[0010]
On the displacement correction screen, the operator traces the areas along the break lines such as the shoulders and edges on the left and right images 011 and 012 as indicated by the thick arrows in FIG. Enter. The three-dimensional information management device 4 calculates the three-dimensional data of the part input by the trace. At that time, the input line segment thus traced is approximated by a spline curve, and as shown in FIG. 4B, the difference in the X parallax between the front and back is also changed with respect to the approximate x parallax of the corresponding point measurement. It is given by function approximation, and the geometry of horizontal shooting is further used for the prediction and fluctuation limit of X parallax, and the matching accuracy is adopted stably. In this way, if the measurement range is traced and input, the area along the break line such as the shoulder and the hip can be specified more reliably than when the measurement range is specified as a rectangular range. The three-dimensional coordinate data can be obtained with high density.
In addition, the trace positions of the left and right images do not necessarily have to be exactly the same. Even if the trace area of one image is narrow and the point information is insufficient, the stereo model of the two images registered in the database 3 is used. Since lacking points are generated in the three-dimensional measurement information management means 4 based on the information, right and left alignment can be performed and three-dimensional data (x, y, z) can be set, so there is no specialized knowledge in general. Can also calculate the three-dimensional coordinate data of the object to be measured.
[0011]
Next, a method for verifying measurement data by applying the three-dimensional coordinate data in the stereo models 011 and 012 measured based on the traced line segment information to another image will be described. For example, for verification of the measurement model Ma (image 011 and image 012) to be verified, an image 013 adjacent to the image 012 is used as shown in FIG. Then, an adjacent model Mb is set in which the left image 012 of the measurement model Ma is a right image and the adjacent image 013 is a left image. At this time, it is assumed that a common measurement point S exists in the three images. The coordinates of the point S obtained based on the measurement model Ma are set to (Xa, Ya, Za), matching is performed again with the adjacent model Mb, and the coordinates (Xb, Yb, Zb) of the point S are obtained. Then, by comparing the values of the coordinates of the point S and verifying whether or not the values are almost the same, it is possible to extract abnormal points in the measurement. Data can be reliably calculated.
[0012]
【The invention's effect】
As described above, according to the first aspect of the present invention , a series of digital images of an object to be measured such as the terrain of the construction site taken in stereo using a digital camera from the ground including the construction site and its surroundings. In the method of selecting the two stereo-photographed images, which are measurement models, from the data, and analyzing the orientation , and obtaining three-dimensional data to be used for construction management, each of the captured image data, the standard of each of the image data fixed point measurement data, various data working process of the stereo model information or the like, such as obtained orientation points analysis results by orientation analysis as well as stored in a database, displayed on the display screen based on the stored scan Tereomoderu information, glue ass on two pictures forming a measurement model, when you calculate the 3-dimensional coordinate data of the region along the breakline such glue shoulder, upper Entered by tracing the breakline on the display screen, since to calculate the three-dimensional coordinate data of the area segment information based on the break line that is the input, such as glue shoulder and glue ass The area along the break line can be specified reliably, and the three-dimensional coordinate data around the break line can be obtained with high density.
[0013]
According to the photography management method of claim 2, when the trace area of one image of the traced measurement model is narrow and the point information for calculating the three-dimensional coordinate data of the area is insufficient Is based on the stereo model information of the two images registered in the database to generate a missing point in the image lacking the point information , and Since the alignment is performed and the measurement ranges of the two image data are aligned, the measurement range can be easily set.
[0014]
According to the photography management method of claim 3, when there are overlapping measurement points common to three or more images, two images are selected from the images and a plurality of measurement points are selected. A model is set and orientation analysis is performed on each measurement model to calculate the three-dimensional coordinate data of the common measurement point, and the calculated three-dimensional coordinate data are compared to determine the plurality of measurement models. Since the measurement results are verified at the same time, even a general worker can surely perform the calculation work of the three-dimensional coordinate data of the object to be measured.
[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 diagram showing a display example of actual image data by a photographing point and a digital camera according to an embodiment of the present invention.
FIG. 3 is a diagram showing an example of a deviation correction image in the measurement model according to the embodiment of the present invention.
FIG. 4 is a diagram illustrating an example of a tracing method according to an embodiment of the present invention.
FIG. 5 is a diagram showing an example of a measurement data verification method according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Photographing management apparatus 2 Input means 3 Photographing plan management means 4 Three-dimensional measurement information management means 5 Measurement data verification means 6 Control means 7 Database 8 Display

Claims (3)

  The two stereo-photographed images that serve as a measurement model from a series of digital image data of the object to be measured, such as the terrain at the construction site, which were stereo-photographed from the ground including the construction site and its surroundings. This is a method for selecting and analyzing the orientation and obtaining three-dimensional data to be used for construction management. Each captured image data, orientation point measurement data of each image data, orientation point analysis results obtained by orientation analysis Various types of data such as stereo model information such as stereo model information are stored in a database, and on the two screens constituting the measurement model displayed on the display screen based on the stored stereo model information, When calculating the 3D coordinate data of the area along the break line such as the shoulder, trace the break line on the display screen. Force, and photographed management method being characterized in that to calculate the three-dimensional coordinate data of the area based on the segment information of the break lines which are the input. When the trace area of one image of the traced measurement model is narrow and the point information for calculating the three-dimensional coordinate data of the area is insufficient, the two images registered in the database Based on the stereo model information, the missing point is generated in the image lacking the point information , the two images are aligned, and the measurement range of the two image data is set. The photography management method according to claim 1, wherein the photography management method is arranged.   If there are overlapping measurement points in three or more images, select two images from the above images, set multiple measurement models, and perform orientation analysis with each measurement model. And calculating the three-dimensional coordinate data of the common measurement points, respectively, and comparing the calculated three-dimensional coordinate data to simultaneously verify the measurement results in the plurality of measurement models. The photography management method according to claim 1 or 2.

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