JP2012073520A - Stereoscopic image display processor, stereoscopic image display processing method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic image display processor, a stereoscopic image display processing method, and a program capable of providing a stereoscopy of a two-dimensional image by displaying a stereo pair image of the two-dimensional image on display means, and allowing a stereoscopic drawing on the stereo pair image by using operation means.SOLUTION: A stereo pair image display processor 100 displays a stereo pair image on a monitor 95. When drawing is made on one of a pair of images constituting the stereo pair image by an operation of an operating unit 94, respective arithmetic units 23-25 refer to three-dimensional coordinates of index data ID and calculate corresponding positions on the other image. Respective units 27-29 superimpose the drawing content on the corresponding positions. The drawing content that has a stereoscopic relationship with the drawing content of the one is thus drawn on the other image.

Description

  The present invention relates to a stereoscopic image display processing apparatus, a stereoscopic image display processing method, and a program for displaying a stereo pair image that can be stereoscopically viewed with a naked eye by using a parallel method, a crossing method, or the like.

  Conventionally, two aerial photographs forming a stereo pair are arranged side by side, and the aerial photographs are stereoscopically viewed (substantial view) with the naked eye by a parallel method or a crossing method, and landslides, active faults, and the like are read. However, in the forest part, it is difficult to interpret because the topography under vegetation cannot be seen. For example, a small-scale landslide is under a forest vegetation and its fluctuation amount is small, so the accuracy varies greatly depending on whether there is local confirmation or the reader's experience. In addition, in the work (transfer) of copying the interpretation result described in the aerial photograph to the map, there is a problem that the position is wrong or the shape is changed during the copying. There was also a problem that it was difficult to interpret the shadow part of the photo.

  On the other hand, aerial laser surveying provides terrain image data with good terrain accuracy under vegetation and effective in interpreting fine terrain. For example, contour plots, color stepped images, shaded images, slope gradients can be created by processing contours, stepped colors according to altitude, shading according to unevenness, etc. so that terrain relief can be expressed on paper. Three-dimensional terrain images (terrain relief maps) such as images and red three-dimensional images are also known (for example, Patent Documents 1 to 4). The topographic image data provided to the reader is an orthographic projection, and the interpretation result can be directly transferred to the map by tracing the image.

  However, the processed data is flat (which can be said to be 2.5 dimensional), and height information such as undulations and inclinations must be quoted in fragments from contour lines and cross-sectional views. The ability to grasp spatial undulations was necessary and skill was required.

  For example, Patent Document 5 displays a pair of stepped maps (stereo pair images) necessary for a stereo photography method, and allows a reader to stereoscopically view a stepped map on the screen with the naked eye by the parallel method or the intersection method. A map display device is disclosed. Specifically, the first map information and the second map information in which the first map information is shifted according to the feature altitude and the parallax is generated between the first map information and the first map information are displayed. . Part of the second map information corresponding to the part clicked by the designation means in the first map information in the display window displayed on the screen is displayed in the display window that appears next to the display window.

International Publication No. 2004/042675 Pamphlet JP 2006-72857 A JP 2007-48185 A JP 2008-242298 A JP-A-2004-333993 (for example, paragraphs [0014]-[0018] [0027] [0033] of the specification, FIG. 12, FIG. 15, etc.)

  However, although the stereoscopic map display device of Patent Document 5 can obtain a result of interpretation such as a landslide or an active fault by stereoscopically viewing a map or a topographic map on a screen, the interpretation result is flat (two-dimensional). There is still a need to transfer on the map. For this reason, there is a possibility that the position or shape of the interpretation result may be transferred by mistake. Of course, even if you add a drawing function that can draw lines etc. on the stereo pair image (map) displayed on the screen, you can move the cursor using a mouse etc. and draw one of the stereo pair images ( Only the map) can draw lines of interpretation results. In this case, there is a problem that a line drawn on the map while stereoscopically viewing the map with the naked eye by the parallel method or the intersection method cannot be stereoscopically viewed. For this reason, when the map is drawn while stereoscopically viewed, the drawn line is difficult to see.

  The present invention has been made paying attention to the above-mentioned problems, and one of the purposes is to display a stereoscopic pair image of a two-dimensional image on a display means, thereby enabling a stereoscopic view of the two-dimensional image. In addition, an object of the present invention is to provide a stereoscopic image display processing apparatus, a stereoscopic image display processing method, and a program capable of rendering a stereoscopic pair image so as to be stereoscopically visible using an operation unit.

  In order to achieve the above object, the present invention provides a stereoscopic image display processing device for displaying on a display means a stereo pair image capable of stereoscopically viewing a two-dimensional image of a figure or a photograph, and displaying the stereo pair image on the display means. An image display means for displaying the first image and the second image that are arranged side by side; one of the first image and the second image whose position is designated by operation of the operation means is a reference image, and the other is a relative image In the case, the first drawing processing means for drawing at the first display position designated by the operation of the operation means, and the relative image that is stereoscopically related to the first display position of the reference image. The gist of the present invention is to provide a second drawing processing means for obtaining a second display position and drawing a drawing content corresponding to the drawing content at the first display position at the second display position.

  According to this invention, the stereoscopic pair image of the two-dimensional image is displayed on the display means, so that the stereoscopic view of the two-dimensional image is possible, and the stereoscopic image is drawn on the stereo pair image using the operation means. Can do.

  In the stereoscopic image display processing device of the present invention, measurement information acquisition means for acquiring measurement information defined by a drawing line drawn as the drawing content in the reference image, the measurement information as the first image and the first image It is preferable to further include first display processing means for displaying each of the display positions in the two images that can be stereoscopically viewed.

According to this invention, the measurement information defined by the drawing line drawn by the operation means can be displayed on the stereo pair image (first image and second image) so as to be stereoscopically viewed.
In the stereoscopic image display processing apparatus of the present invention, an elevation value corresponding to the coordinates of a point designated as a node of the drawing line is acquired by the operation means, and a cross-sectional shape cut by the drawing line based on the elevation value is obtained. It is preferable to further include second display processing means for displaying. According to the present invention, when a drawing line is drawn by the operation means, the cross-sectional shape cut by the drawing line can be displayed.

  In the stereoscopic image display processing device of the present invention, it is preferable that the stereoscopic image display processing device further includes an output unit that outputs the three-dimensional coordinate data of the drawing line. According to this invention, the three-dimensional coordinate data of the drawing line drawn by the operating means can be acquired.

In the stereoscopic image display processing apparatus of the present invention, it is preferable that the stereoscopic image display processing apparatus further includes a switching unit that switches a type of a two-dimensional image displayed as the stereo pair image on the display unit.
According to the present invention, the type of two-dimensional image displayed as a stereo pair image on the display means can be switched. For example, it is easy to acquire appropriate interpretation results by switching the types of two-dimensional images and stereoscopically viewing a plurality of types of two-dimensional images.

  In the stereoscopic image display processing device of the present invention, the storage for storing the reference image data for displaying the reference image and the three-dimensional coordinate data in which the three-dimensional coordinates corresponding to the image coordinates of the reference image data are defined. The second display processing means acquires the three-dimensional coordinates corresponding to the image coordinates of the point designated in the reference image by the operation means with reference to the three-dimensional coordinate data, and It is preferable that image coordinates in the relative image corresponding to three-dimensional coordinates are obtained and drawn at the image coordinates in the relative image.

  According to the present invention, if the image coordinates in the relative image corresponding to the image coordinates specified in the reference image are obtained through the three-dimensional coordinate data, the image coordinates of the relative image are in a stereoscopically viewable relationship. Can be obtained relatively easily.

  In the stereoscopic image display processing apparatus of the present invention, the three-dimensional coordinate data is stored separately for each display area of the reference image, and the resolution of the reference image is equal to the image resolution using the three-dimensional coordinate data. It is preferable to further include reproducing means for reproducing the three-dimensional terrain coordinate data. According to the present invention, the three-dimensional terrain coordinate data can be easily reproduced using the three-dimensional coordinate data.

  The present invention is a stereoscopic image display processing method for displaying on a display means a stereo pair image capable of stereoscopically viewing a two-dimensional image of a figure or a photograph, and a first image and a second image constituting the stereo pair image on the display means. An image display stage for displaying images side by side, and when one of the first image and the second image whose position is designated by operation of the operation means is a reference image and the other is a relative image, the operation of the operation means A first drawing processing stage for drawing at the first display position specified in step (b), and obtaining a second display position in the relative image that is stereoscopically related to the first display position of the reference image; A gist of the invention is that the second display position includes a second drawing process step of drawing the drawing content corresponding to the drawing content at the first display position. According to the present invention, it is possible to obtain the same effect as that of the invention according to the stereoscopic image display processing device.

  The present invention is a program for causing a computer to execute a stereoscopic image display process for causing a display means to display a stereo pair image capable of stereoscopically viewing a two-dimensional image of a figure or a photograph. The computer displays the stereo pair image on the display means. An image display step for displaying the first image and the second image that are arranged side by side; one of the first image and the second image, the position of which is designated by the operation of the operating means, is the reference image, and the other is the relative image In the case, the first drawing processing stage for drawing at the first display position designated by the operation of the operation means, and the relative image in a stereoscopic view relation with the first display position of the reference image. A program for obtaining a second display position, and causing the second display position to execute a second drawing process step of drawing the drawing contents corresponding to the drawing contents at the first display position. It is. According to the present invention, it is possible to obtain the same effect as that of the invention according to the stereoscopic image display processing device.

  According to the present invention, a stereoscopic pair image of a two-dimensional image is displayed on the display means, so that a stereoscopic view of the two-dimensional image is possible and a stereoscopic view is rendered on the stereo pair image using the operation means. The excellent effect of being able to be obtained is obtained.

The schematic diagram of the personal computer provided with the stereo pair image display processing apparatus. The schematic diagram explaining the method of an aerial laser surveying. The block diagram which shows each function structure of a stereo pair image creation apparatus and a stereo pair image display processing apparatus. The block diagram which shows the specific function structure of a stereo pair image creation apparatus. The model perspective view explaining center projection. (A)-(c) The schematic diagram which shows three types of stereo pair image data and three-dimensional coordinate index data. The screen figure on which the stereo pair image of the topographic relief map was displayed. The screen figure on which the stereo pair image of the photograph map was displayed. The block diagram explaining the processing content of an image coordinate calculating part and a three-dimensional coordinate extraction part. The block diagram explaining the process for implement | achieving a stereoscopic vision automatic drawing function. The screen figure in which the altitude was displayed on the stereo pair image. FIG. 3 is a block diagram for explaining a function for automatically drawing a stereoscopic line of measurement lines and polygons. The flowchart which shows a stereoscopic vision automatic drawing process. The flowchart which shows the process according to a mode. The screen figure by which the measurement line and measurement information were superimposed and displayed on the stereo pair image. The screen figure on which the polygon was superimposed and displayed on the stereo pair image. The screen figure on which the polygon based on polygon data was superimposed and displayed on the map image of a CAD apparatus. The screen figure in which the section line was drawn in profiler mode.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
FIG. 1 shows a personal computer including a stereo pair image display processing device as an example of a stereoscopic image display processing device. As shown in FIG. 1, a personal computer (hereinafter referred to as “PC 90”) includes a main body 91, an operation unit 94 including a keyboard 92 and a mouse 93, and a monitor 95 (display device) as an example of display means. ing. The main body 91 of the PC 90 incorporates the stereo pair image display processing device 100 shown in FIG. The stereo pair image display processing device 100 displays on the monitor 95 a stereo pair image SG (see FIGS. 7 and 8) composed of a pair of left and right images (stereo images) that can be stereoscopically viewed (substantial view) by an intersection method or a parallel method. indicate. A microcomputer (hereinafter simply referred to as “computer 96”) in the main body 91 includes a CPU 97 (central processing unit), a RAM 98, and a storage device 99. The storage device 99 stores a program PR for stereo pair image display processing. In the present embodiment, the stereo pair image display processing device 100 is constructed in the main body 91 by the CPU 97 executing this program PR. The program PR is installed in the PC 90 by reading from a storage medium such as a CD-ROM or DVD or by downloading from a server (not shown) via the Internet.

  FIG. 3 is a block diagram illustrating functional configurations of the stereo pair image creation device and the stereo pair image display processing device. The stereo pair image creation device 10 is provided in a PC other than the PC 90. The stereo pair image creation device 10 is for creating stereo pair image data SD and three-dimensional coordinate index data ID (hereinafter also simply referred to as “index data ID”) used in the stereo pair image display processing device 100. is there.

  As an example, the stereo pair image creation apparatus 10 shown in FIG. 3 is based on digital elevation data D1 (for example, DEM (Digital Elevation Model)), photographic map data D2, geographic information data D3, and the like. An index data ID is generated. The stereo pair image creation apparatus 10 of the present embodiment includes three types of stereo pair image data SD: stereo pair image data SD1 of a topographic relief map, stereo pair image data SD2 of a photographic map, and stereo pair image data SD3 of geographic information. Generate. The stereo pair image data SD and index data ID including these data SD1, SD2, and SD3 are input to the stereo pair image display processing device 100 and stored (stored) in the buffer 20 in the stereo pair image display processing device 100. Yes. The stereo pair image display processing apparatus 100 has a function of displaying a stereo pair image of a two-dimensional image such as a topographic relief map and geographic information as an example of a figure, and a photographic map as an example of a photograph.

  Here, data D1 to D3 and the like input to the stereo pair image creation device 10 will be described. The numerical elevation data D1 is acquired by using an aerial laser survey as shown in FIG. 2, for example. As shown in FIG. 2, an aircraft 202 equipped with a laser surveying instrument 201 performs a laser scan that emits a laser to the ground while flying over the survey target area, and measures the reflected pulse to obtain aviation laser survey data. To do. The aircraft 202 acquires the latitude / longitude of the current survey position based on the GPS signal received from the GPS satellite 203 and the altitude Z based on the measurement value of the reflected laser at that time, and the altitude is associated with the latitude / longitude. Acquire 3D aerial laser survey data. From this aviation laser survey data, features such as buildings, trees, vehicles, etc. that do not represent topographical shapes are separated, and modeled and generated from TIN (Triangle Irregular Network), etc. The numerical elevation data D1 is generated by reading the elevation Z at the intersection of the distance (for example, a predetermined value in the range of 0.1 m to 50 m) mesh. Of course, the digital elevation data D1 can also be obtained from aerial photogrammetry, satellite imagery, radar measurement, or the like.

  During this laser surveying, the aircraft 202 takes a color photograph of the survey target area at regular intervals (distances) by the camera 204 while performing laser scanning. This color photograph data becomes the photograph map data D2. For this reason, the numerical elevation data D1 and the photographic map data D2 have corresponding areas. The geographic information data D3 is image data in which geographic information such as landslides and active faults are expressed in color.

  FIG. 4 shows a specific functional configuration of the stereo pair image creation apparatus. As shown in FIG. 4, the stereo pair image creation device 10 includes a first creation unit 11, a second creation unit 12, a central projection conversion unit 13, an image coordinate conversion unit 14, and a raster data conversion unit 15.

  The first creation unit 11 creates numerical elevation data D4 of a terrain relief map in which the undulation state of the terrain is expressed in stages (color representation) according to the elevation based on the digital elevation data D1. Specifically, the first creation unit 11 performs numerical gradation processing for applying a hue corresponding to the elevation Z to the numerical elevation data D1 and applying a shadow (for example, a gray scale) according to the degree of unevenness, thereby providing a numerical elevation. Numerical elevation data D4 of a topographic relief map including coordinates (X, Y, Z) and color coordinates (R, G, B) is created.

  The second creation unit 12 assigns color information (RGB) acquired from the photographic map data D2 to the digital elevation data D1, and provides digital elevation coordinates (X, Y, Z), color coordinates (R, G, B), and so on. The digital altitude data D5 of the color photographic map including is created. In addition, the second creating unit 12 assigns the color information (RGB) acquired from the geographic information data D3 to the numerical elevation data D1, and the numerical elevation coordinates (X, Y, Z) and the color coordinates (R, G, B). ) To create digital elevation data D6 of color geographic information. In other words, the second creation unit 12 adds each grid point extracted from the color image data D2 and D3 to each grid point of the numerical elevation data D1 expressed by the three-dimensional coordinates (X, Y, Z) having no color information. The color information (RGB values) is added to create colored numerical elevation data D5 and D6 for color photograph maps and color geographic information. Thus, the digital elevation data D4, D5, D6 are image data of 6-dimensional coordinates (X, Y, Z, R, G, B).

  The central projection conversion unit 13, the image coordinate conversion unit 14, and the raster data conversion unit 15 convert the respective stereo pair image data SD1, SD2, SD3 based on the 6-dimensional numerical elevation data D4, D5, D6 having RGB information. Generate. That is, the stereo pair image data SD1 of the topographic relief map is generated from the digital elevation data D1, the stereo pair image data SD2 of the photographic map is generated from the photographic map data D2, and the stereo pair image data SD3 of the geographic information from the geographic information data D3. Is generated. The stereo pair image data SD1, SD2, SD3 is composed of a pair of left-eye stereo image data LD and right-eye stereo image data RD, respectively. In the pair of stereo image data LD and RD, images of two areas overlapping (wrapping) at a predetermined ratio (for example, a predetermined value within a range of 50 to 100%) are prepared over the entire display target area. The images of the two areas are an image viewed from the angle of the left eye and the other viewed from the angle of the right eye.

  First, the central projection conversion unit 13 centrally projects a target area for the left eye around the photographing reference position, and converts the target area into an image viewed with the left eye. Similarly, the central projection conversion unit 13 centrally projects a target area for the right eye around the photographing reference position, and converts the target area into an image viewed with the right eye.

  FIG. 5 is a schematic perspective view for explaining central projection. The aircraft 202 captures the terrain just below by the camera 204 (see FIG. 2) at two different capturing positions. The photographing position at this time is the photographing reference positions SP1 and SP2.

  In the numerical elevation data D4, D5, and D6, the two areas A1 and A2 shown in FIG. 5 are selected so as to partially overlap (wrap). As shown in FIG. 5, the area A1 is a rectangular area of a rectangular ABCD, and the area A2 is a rectangular area of a rectangular EFGH that partially overlaps (wraps) the area A1. A calculation for center-projecting the area A1 in the right viewing direction around the photographing reference position SP1 is performed to generate right-eye stereo image data RD (rectangle abcd in FIG. 5). Further, a calculation for center-projecting the area A2 in the left viewing direction centering on the photographing reference position SP2 is performed to generate left-eye stereo image data LD (rectangle efgh in FIG. 5). The overlapping range (range e′f′cd and range efc′d ′) of the right-eye stereo image RG and the left-eye stereo image LG is a range that can be stereoscopically viewed by the parallel method (or the intersection method).

  The central projection conversion unit 13 shown in FIG. 4 performs a known calculation for centrally projecting the two areas A1 and A2 shown in FIG. 5 selected from the digital elevation data D4, D5, and D6 for the right eye and the left eye, respectively. Then, three types of stereo pair image data D7, D8, and D9 including the right-eye stereo image data RD and the left-eye stereo image data LD are generated. The stereo pair image data D7, D8, D9 is composed of 6-dimensional data including color coordinates (R, G, B) and numerical elevation coordinates (X, Y, Z).

  The image coordinate conversion unit 14 converts the stereo pair image data D7, D8, and D9 from the three-dimensional coordinate system indicated by the numerical elevation coordinates (X, Y, Z) to the image coordinate system for monitor display, thereby obtaining an RGB image. Stereo pair image data D10, D11, D12 consisting of data is generated. Further, the image coordinate conversion unit 14 generates an east-west coordinate X (for example, longitude), a north-south coordinate Y (for example, latitude), and an altitude value Z corresponding to the image coordinates of the stereo pair image data D10, D11, and D12.

  The raster data conversion unit 15 converts the stereo pair image data D10, D11, D12, the east-west coordinate, the north-south coordinate, and the elevation value into raster data. In this way, the stereo pair image data SD1, SD2, SD3 of the topographic relief map, the photo map, and the geographic information are generated. The raster data converter 15 also generates a three-dimensional coordinate index data ID including the east-west coordinate data ED, the north-south coordinate data ND, and the elevation data ZD after the raster conversion.

  FIG. 6 shows three types of stereo pair image data and three-dimensional coordinate index data. FIG. 6A shows stereo pair image data SD1 of the topographic relief map and three-dimensional coordinate index data ID1 corresponding thereto. The stereo pair image data SD1 of the topographic relief map is composed of a pair of left-eye stereo image data LD and right-eye stereo image data RD. The three-dimensional coordinate index data ID1 includes east-west coordinate data ED, north-south coordinate data ND, and altitude data ZD in which the image coordinates and coordinates of the left-eye stereo image data LD serving as the reference image among the pair of stereo images are associated. For this reason, when the coordinates in the stereo image data LD are designated, the longitude X can be acquired from the coordinate value corresponding to the designated coordinates in the east-west coordinate data ED, and the coordinates corresponding to the designated coordinates in the north-south coordinate data ND are obtained. The latitude Y can be acquired from the coordinate value, and the elevation Z can be acquired from the coordinate value corresponding to the designated coordinate in the elevation data ZD.

  FIG. 6B shows stereo pair image data SD2 of the photo map and the corresponding three-dimensional coordinate index data ID2, and FIG. 6C shows stereo pair image data SD3 of the geographic information and this. Is the three-dimensional coordinate index data ID3 corresponding to. Each stereo pair image data SD2 and SD3 of the photographic map and geographic information is composed of a pair of left-eye stereo image data LD and right-eye stereo image data RD. The three-dimensional coordinate index data ID2 and ID3 include east-west coordinate data ED, north-south coordinate data ND, and altitude data ZD in which the image coordinates and coordinates of the left-eye stereo image data LD are associated with each other. For this reason, when the image coordinates in the stereo image data LD are designated, the longitude X, latitude Y, and altitude Z corresponding to the designated coordinates can be acquired by referring to the index data ID2 and ID3. . Of course, the stereo image for the right eye may be used as a reference image, and this may be associated with the coordinates of the data ED, ND, and ZD. Further, a pair of index data IDs respectively corresponding to the left-eye and right-eye stereo image data are provided, and the position on either stereo image is designated by the three-dimensional coordinates (X, Y, Z) may be acquired. Further, only one index data ID common to the stereo pair image data SD1, SD2, and SD3 may be used, and a small amount of data may be used.

  Next, details of the stereo pair image display processing apparatus 100 will be described. As shown in FIG. 3, the stereo pair image display processing apparatus 100 includes a main control unit 21, an image switching unit 22, an image coordinate calculation unit 23, a three-dimensional coordinate extraction unit 24, a stereo image coordinate calculation unit 25, and a measurement information calculation. A unit 26, a vector generation unit 27, a superimposition processing unit 28, a display processing unit 29, a vectorization unit 30, an output unit 31, a section line calculation unit 32, a three-dimensional reproduction unit 33, and a print output unit 34.

  The stereo pair image display processing device 100 displays the screen for displaying the stereo pair image shown in FIG. 7 based on the screen display image data GD (not shown) and the stereo pair image data SD stored in the buffer 20 (memory). 40 is displayed on the monitor 95 (stereo pair image display function). Specifically, the main control unit 21 sends image data for the screen generated based on the data GD and SD to the display processing unit 29, and causes the display processing unit 29 to display the screen 40 based on the image data.

  Here, details of the screen 40 will be described. As shown in FIG. 7, at the position slightly to the left of the center of the screen 40, the first display area 41 in which the left-eye stereo image LG based on the left-eye stereo image data LD is displayed and the right-eye stereo image data RD are used. A second display area 42 on which the right-eye stereo image RG is displayed is arranged side by side. On the screen 40, the image coordinates (x, y) and geodetic coordinates (X, Y, Z) of the point corresponding to the cursor position are displayed at the lower position of each display area 41, 42. In the present embodiment, as an example, the left-eye stereo image LG corresponds to the first image (reference position), and the right-eye stereo image RG corresponds to the second image (relative image). In the present embodiment, the main control unit 21 displays the screen 40 to display the left-eye stereo image LG and the right-eye stereo image RG that constitute the stereo pair image SG side by side in the image display stage. It corresponds to.

  By selecting check boxes 43 to 46 provided at the upper part of the screen 40, modes of “interlocking lock”, “terrain snap”, “measurement”, and “polygon drawing” are selected. Further, in the screen 40, a storage destination designating unit 47 for designating a storage destination of data such as drawing data and measurement data, an image change button 48 for changing (switching) the type of the stereo pair image SG, and a display area 41 , 42 is provided with a moving button 49 for moving the stereo images LG, RG up, down, left and right. In this example, the movement button 49 includes an up button 49A, a down button 49B, a front button 49C (left button), and a next button 49D (right button), and moves the stereo images LG and RG in four directions, up, down, left, and right. Is possible. Also, in the screen 40, a confirmation button 50 (end button) for instructing confirmation and termination, an enlargement button 51 for enlarging the stereo images LG, RG, and a reduction button for reducing the stereo images LG, RG. 52 is provided. Further, the screen 40 is provided with a “simple 3D data” output button (hereinafter simply referred to as “output button 53”) for reproducing and outputting simple numerical elevation data (three-dimensional terrain coordinate data) from the index data ID. ing. A check box 54 for selecting a profiler mode is provided at the bottom of the screen 40.

  Here, various modes will be described. The “linked lock” mode is a mode in which the left and right stereo images LG and RG are linked. The “terrain snap” mode is a mode in which the cursor is automatically moved to a terrain feature point (such as a mountain top or a valley bottom) near the cursor. The “measurement” mode is a cumulative distance L between two points on a line segment drawn on a stereo image such as a terrain relief map or a photographic map by moving the cursor, an altitude difference H, an azimuth angle α, an inclination angle θ ( This is a mode for displaying a measured value (measurement information) including (inclination) and the area S of the drawn region (see FIG. 15). The “polygon drawing” mode is a mode for designating a plurality of points and drawing a polygon including a route line or a polygon on a stereo image. If a polygon is drawn in this mode, the polygon data file can be output. The “profiler” mode is a mode in which a sectional view (terrain sectional line 56) cut along a line drawn on a stereo image is displayed in another display area (profiler display area 55) (FIG. 18). reference).

  In the present embodiment, the left-eye stereo image LG is a reference image, and in a mode capable of drawing such as “measurement” and “polygon drawing”, the movement locus of the cursor moved on the reference image by operating the mouse 93 It is possible to draw graphic elements such as lines and polygons along the line. Then, when a graphic element is drawn on one stereo image (for example, the left-eye stereo image LG), the same graphic element is automatically drawn on the other stereo image (for example, the right-eye stereo image RG) at a display position where it can be stereoscopically viewed. (Stereoscopic automatic drawing function) (see FIGS. 15, 16, and 18). Note that a cross mark is displayed at the cursor position designated by the mouse 93 in the left-eye stereo image LG, and the same cross mark is displayed at a stereoscopically visible position in the right-eye stereo image RG. (See FIG. 11 etc.).

  In the measurement mode, measurement information is displayed at the cursor position on the stereo image or near the drawn line segment (measurement line) (measurement display function). The character string of the measurement information is displayed at a display position where the stereoscopic images LG and RG can be stereoscopically viewed. Furthermore, a data output function (three-dimensional data output function) for outputting three-dimensional coordinate information of polygons (including points and lines) drawn in the polygon drawing mode is also provided. Also provided is a three-dimensional data reproduction function for reproducing and outputting simple numerical elevation data (three-dimensional terrain coordinate data) from the index data ID.

  The stereo pair image display function, the stereoscopic view automatic drawing function, the measurement display function, and the data output function are realized by each unit in the stereo pair image display processing apparatus 100 shown in FIG. Hereinafter, each part in the stereo pair image display processing apparatus 100 will be described in detail.

  The main control unit 21 performs overall control of the units 22 to 33. The main control unit 21 switches the mode according to the check contents of the check boxes 43 to 46, 54, and gives an instruction according to the mode at that time to the units 22 to 33.

  The image switching unit 22 performs a process of switching the stereo pair image SG displayed on the screen 40. In this example, when the image change button 48 is operated in a state where one type of stereo pair image SG among at least three types of topographic relief map, photographic map, and geographic information is displayed, the image switching unit 22 operates. The stereo pair image SG (stereo images LG, RG) in the display areas 41, 42 is switched to another type. For example, when the image change button 48 is operated on the screen 40 of FIG. 7, the image switching unit 22 reads the next stereo pair image data SD2 from the buffer 20, and the terrain undulations displayed in the display areas 41 and 42 are displayed. The stereo pair image SG1 (stereo images LG, RG) in the figure is switched to the stereo pair image SG2 (stereo images LG, RG) of the photographic map shown in FIG. The image switching unit 22 switches the stereo pair image SG to be displayed, for example, in the order of topographic relief map → photo map → geographic information →... Each time an operation signal for the image change button 48 is input.

The image coordinate calculation unit 23 calculates the image coordinates (j, k) of the specified position (cursor position) on the stereo image LG specified by the operation unit 94 (for example, the mouse 93).
The three-dimensional coordinate extraction unit 24 extracts three-dimensional coordinates (X, Y, Z) from the image coordinates (j, k). This extraction is performed with reference to the three-dimensional coordinate index data ID.

  FIG. 9 is a block diagram illustrating processing contents of the image coordinate calculation unit 23 and the three-dimensional coordinate extraction unit 24. As shown in FIG. 9, the image coordinate calculation unit 23 calculates image coordinates (j, k) corresponding to the position designated by the operation unit 94 in the stereo image data LD. The data of the image coordinates (j, k) is sent to the three-dimensional coordinate extraction unit 24.

  The three-dimensional coordinate extraction unit 24 acquires values X, Y, and Z corresponding to the image coordinates (j, k) in each data ED, ND, and ZD constituting the index data ID. Specifically, the three-dimensional coordinate extraction unit 24 corresponds to the longitude X (= E (j, k)) corresponding to the image coordinate (j, k) in the data ED and the image coordinate (j, k) in the data ND. The latitude Y (= N (j, k)) and the altitude Z (= El (j, k)) corresponding to the image coordinates (j, k) in the elevation data ZD are acquired. Then, the three-dimensional coordinate extraction unit 24 outputs three-dimensional coordinate information (X, Y, Z).

  As shown in FIG. 3, the three-dimensional coordinate information (X, Y, Z) output from the three-dimensional coordinate extraction unit 24 is sent to the stereo image coordinate calculation unit 25. In the measurement mode, the three-dimensional coordinate information (X, Y, Z) is also sent to the measurement information calculation unit 26.

  The stereo image coordinate calculation unit 25 shown in FIG. 3 displays on the stereo image RG that has a stereoscopically viewable positional relationship with respect to the image coordinates (j, k) at the specified position (cursor position) on the stereo image LG. The image coordinates (p, q) of the position are calculated.

  FIG. 10 is a block diagram for explaining a stereoscopic vision automatic drawing function (processing) for displaying the content rendered by the operation of the mouse 93 on the stereo image LG so as to enable stereoscopic viewing. With reference to FIG. 10, the process of the stereo image coordinate calculation unit 25 will be described. The stereo image coordinate calculation unit 25 uses the three-dimensional coordinate information (X) acquired by the three-dimensional coordinate extraction unit 24 with reference to the index data ID based on the image coordinates (j, k) calculated by the image coordinate calculation unit 23. , Y, Z) from the three-dimensional coordinate extraction unit 24, the image coordinates (p, q) of the points on the right-eye stereo image RG corresponding to the three-dimensional coordinates (X, Y, Z) are calculated. Therefore, the image coordinates (j, k) on the left-eye stereo image LG of the three-dimensional coordinates (X, Y, Z) and the image coordinates on the right-eye stereo image RG of the three-dimensional coordinates (X, Y, Z). (P, q) is determined. The image coordinates (p, q) indicate the display position on the right-eye stereo image RG that can be stereoscopically viewed with respect to the image coordinates (j, k) at the specified position (cursor position) on the left-eye stereo image LG. . The image coordinates (p, q) can be obtained by converting the three-dimensional coordinates (X, Y, Z) from the three-dimensional coordinate system to the right-eye image coordinate system using the imaging reference position information SP of the target area. The display position (image coordinates) that can be stereoscopically viewed can be acquired by simple and simple calculation.

  For example, in the terrain snap mode as shown in the screen 40 of FIG. 11, the altitude Z at the position (cursor position) designated on the left-eye stereo image LG by the mouse 93 is a character string that can be stereoscopically viewed on the stereo images LG and RG. It is automatically displayed as (measurement information). 10 receives at least the elevation value Z from the three-dimensional coordinate extraction unit 24, and generates character string image data of the elevation value Z. The superimposition processing unit 28 includes a first superimposition processing unit 28A that superimposes character string image data on the left-eye stereo image data LD, and a second superimposition processing unit 28B that superimposes character string image data on the right-eye stereo image data RD. Prepare. The first superimposition processing unit 28A calculates a predetermined vicinity position as the display coordinates of the character string image with respect to the image coordinates (j, k) of the designated position, and a position corresponding to the display coordinates on the left-eye stereo image data LD. The character string image data is superimposed on. On the other hand, the second superimposition processing unit 28B calculates a predetermined nearby position as the display coordinates of the character string image with respect to the image coordinates (p, q) of the designated position, and corresponds to the display coordinates on the right-eye stereo image data RD. The character string image data is superimposed on the position to be performed. Then, each stereo image based on the stereo image data LD, RD on which the character string image is superimposed is displayed on each display area 41, 42 of the screen 40 by the display processing unit 29, thereby showing the screen 40 in FIG. As described above, in each stereo image LG, RG, the character string of the altitude value Z is displayed in a stereoscopic view at a position near the cursor position.

  The measurement information calculation unit 26 shown in FIG. 3 uses a distance (cumulative distance L) and an altitude difference H between two ends of a path drawn on a stereo image by operating the mouse 93 in the measurement mode or the polygon drawing mode. In addition, the inclination angle θ and the azimuth angle α are calculated, and when a closed route is drawn, the area S of the region (polygon region) surrounded by the route is calculated. For this purpose, the measurement information calculation unit 26 calculates a distance calculation unit 26A that calculates the accumulated distance L, an altitude difference calculation unit 26B that calculates the height difference H, a tilt angle calculation unit 26C that calculates the tilt angle θ, and an azimuth angle α. An azimuth angle calculation unit 26D that calculates the area S and an area calculation unit 26E that calculates the area S.

  The vector generation unit 27 and the superimposition processing unit 28 perform image generation processing for drawing measurement lines and polygons on a stereo image in the measurement mode or the polygon drawing mode. FIG. 12 is a block diagram for explaining a stereoscopic vision automatic drawing function (processing) for displaying drawn measurement lines and polygons on the stereo pair image SG so as to enable stereoscopic viewing. In the measurement mode, a measurement line (see FIG. 15) is drawn by designating two points of a start point and an end point on the stereo image LG by operating the mouse 93. In the polygon drawing mode, a polygon (see FIG. 16) is drawn by designating a plurality of points by operating the mouse 93.

  Hereinafter, each process performed by the vector generation unit 27 and the superimposition processing unit 28 will be described with reference to FIG. When a specified position Pn (n = 1,... M (m is a natural number of m ≧ 2)) of a plurality of points (m points) is specified when drawing with the mouse 93, the image coordinate calculation unit 23 In the position designation after the eye, the image coordinates (jn-1, kn-1) of the previous designated position Pn-1 and the image coordinates (jn, kn) of the current designated position Pn are calculated. The three-dimensional coordinate extraction unit 24 refers to the index data ID based on the previous and current image coordinates (jn-1, kn-1), (jn, kn), and sets the previous designated position Pn-1. The three-dimensional coordinates (Xn-1, Yn-1, Zn-1) and the three-dimensional coordinates (Xn, Yn, Zn) of the current designated position Pn are calculated. Then, the stereo image coordinate calculation unit 25 performs the previous designation on the right-eye stereo image RG based on the three-dimensional coordinates (Xn-1, Yn-1, Zn-1) and (Xn, Yn, Zn). The image coordinates (pn-1, qn-1) corresponding to the position and the image coordinates (pn, qn) corresponding to the current designated position are calculated.

  The vector generation unit 27 shown in FIG. 3 generates a vector in which a path (line) between two points designated on a stereo image is rendered in a stereoscopic manner so that the two points are the start and end points. To do. Specifically, as shown in FIG. 12, the vector generation unit 27 generates a vector that defines a path between two points specified on the left-eye stereo image LG, and the specified vector generation unit 27A. A second vector generation unit 27B that generates a vector defining a path between two points on the right-eye stereo image RG corresponding to two points. The first vector generation unit 27A generates vectors having the two image coordinates (jn-1, kn-1) and (jn, kn) designated by the cursor on the left-eye stereo image LG as start points and end points, respectively. To do. On the other hand, the second vector generation unit 27B has image coordinates (pn-1, qn-1) indicating two points on the right-eye stereo image RG that are stereoscopically related to the two points on the left-eye stereo image LG. ), (Pn, qn) are obtained, and vectors having respective start and end points are generated. Then, by designating the designated position Pn of a plurality of points, one or a plurality of vectors having two points among the plurality of points as the start point and the end point are converted into the image coordinate system of the left-eye stereo image and the right-eye stereo. It is generated in each image coordinate system.

  The superimposition processing unit 28 generates images of display elements such as measurement lines and polygons (hereinafter also referred to as “component images”) defined by vectors for the left eye and the right eye, and the left eye and right eye components. Superimposition processing for superimposing the image data on each of the stereo image data LD and RD is performed. Here, the display elements include, in addition to the above-described character string such as the elevation value Z (see FIG. 11), for example, points, lines, and polygons drawn on one stereo image by the mouse 93 and on the other stereo image. Refers to graphic elements such as points, lines, and polygons that are automatically drawn in a stereoscopic manner. The display element also includes character strings of measurement results such as cumulative distance L, altitude difference H, inclination angle θ, azimuth angle α, and area S. Of course, other graphic elements such as symbols and marks related to maps, weather, and the like can also be adopted.

  The first superimposition processing unit 28A illustrated in FIG. 12 performs a superimposition process between the left-eye stereo image and the left-eye component image, and the second superimposition processing unit 28B performs a superimposition process between the right-eye stereo image and the right-eye component image. Do. Specifically, the first superimposition processing unit 28A reads the left-eye stereo image data LD from the buffer 20 and inputs the left-eye vector from the first vector generation unit 27A. At this time, if in the measurement mode, the first superimposition processing unit 28A also reads measurement information. The first superimposition processing unit 28A generates a part image such as a measurement line or a polygon defined by the vector for the left eye based on the vector for the left eye, and further displays the measurement information such as the measurement mode. Character image data (hereinafter also referred to as “measurement information image data”) is generated. Then, the first superimposition processing unit 28A superimposes the component image data and, if necessary, the measurement information image data on the left-eye stereo image data LD.

  The second superimposition processing unit 28B reads the right-eye stereo image data RD from the buffer 20 and inputs the right-eye vector from the second vector generation unit 27B. At this time, in the measurement mode, the second superimposition processing unit 28B also reads measurement information from the stereo image coordinate calculation unit 25. Here, in the measurement mode, the stereo image coordinate calculation unit 25 acquires the measurement information display position (image coordinates) in the image coordinate system of the left-eye stereo image together with the measurement information from the measurement information calculation unit 26. The stereo image coordinate calculation unit 25 includes a 3D coordinate extraction unit having the same function as the 3D coordinate extraction unit 24, and extracts 3D coordinates corresponding to the image coordinates of the measurement information. Based on the extracted three-dimensional coordinates, the display position (image coordinates) of the measurement information in the image coordinate system of the right-eye stereo image is calculated using the imaging reference position information SP. The display position (image coordinates) of the measurement information calculated in this way is sent from the stereo image coordinate calculation unit 25 to the second superimposition processing unit 28B.

  The second superimposition processing unit 28B generates a part image such as a measurement line or a polygon defined by the vector for the right eye based on the vector for the right eye, and further displays the measurement information such as the measurement mode. Character image data (hereinafter also referred to as “measurement information image data”) is generated. Then, the second superimposition processing unit 28B superimposes the component image data and, if necessary, the measurement information image data on the right-eye stereo image data RD. At this time, in the measurement mode, the second superimposition processing unit 28B superimposes the measurement information image data on the display position defined by the image coordinates acquired from the stereo image coordinate calculation unit 25.

  The display processing unit 29 displays the left-eye stereo image LG based on the left-eye stereo image data LD after the superimposition processing generated by the first superimposition processing unit 28A in the first display area 41, and the second superimposition processing unit 28B A display process for displaying the right-eye stereo image RG based on the generated right-eye stereo image data RD in the second display area 42 is performed. The display processing unit 29 outputs image data to a display driver (not shown), and thereby the screen 40 including a pair of stereo images LG and RG on which display elements are superimposed on the monitor 95 (FIGS. 11, 14, and 16). , See FIG. 18). As a result, a pair of stereo images LG and RG on which the display elements are superimposed are displayed in the display areas 41 and 42 in the screen 40 displayed on the monitor 95.

  Next, polygon data output processing in the polygon drawing mode will be described. The vectorization unit 30 shown in FIGS. 3 and 12 acquires the three-dimensional coordinate data (three-dimensional coordinate information) indicating the polygon drawn on the stereo image from the three-dimensional coordinate extraction unit 24, and the acquired three-dimensional coordinates. Data is converted into vector format data (polygon data PD). Since this polygon data PD is vector data, it can be displayed by superimposing polygons on the map image displayed on the CAD device 80 (see FIG. 17).

  The output unit 31 shown in FIGS. 3 and 12 outputs data L, H, θ, α, S obtained as measurement information, and polygon data PD. As a result, the measurement information data and the polygon data PD are output to the outside of the stereo pair image display processing apparatus 100 and are saved as files in a predetermined storage area of the storage device 99 (for example, a hard disk) designated as the storage destination.

  The polygon data PD file is extracted from the PC 90 to a storage medium, for example, and is read by the CAD device 80. A polygon PG can be superimposed and displayed based on the polygon data PD (file) on the map displayed on the monitor 81 of the CAD device 80. That is, the polygon PG based on the polygon data PD is displayed on a separate layer from the map image of the monitor 81 by the CAD device 80, whereby the polygon PG can be transferred onto the map.

  3 is activated when in the profiler mode. The section line calculation unit 32 calculates a topographic cross section line (topographic surface line) cut along a route drawn on the stereo image. The calculated section line is displayed by the display processing unit 29 in the profiler display area 55 at the bottom of the screen 40 shown in FIG. The profiler display area 55 is provided with an input field in which the horizontal axis adjustment magnification and the vertical axis adjustment magnification can be input and set. The section line calculation unit 32 refers to the index data ID based on the image coordinates of each point passing through the drawn path in accordance with the horizontal axis adjustment magnification and the vertical axis adjustment magnification that are input and set. Is calculated. Then, vectors having the elevation point Zn-1 of the previous designated point and the elevation point Zn of the current designated point as the starting point and the ending point are sequentially generated. Then, by sequentially drawing the image of the line segment (path) defined by the vector, the cross section line 56 is displayed (automatic drawing) in the profiler display area 55.

  The three-dimensional reproduction unit 33 shown in FIG. 3 is activated when the output button 53 is operated, and reproduces simple numerical elevation data (three-dimensional terrain coordinate data) from the index data ID. For this reason, even if the digital elevation data D1 having a relatively large amount of data is not stored in the PC 90, the index data ID stored for stereo pair image display processing can be simply used by using the index data ID having a relatively small amount of data. Digital elevation data can be reproduced. The numerical elevation data is output from the output unit 31.

  The print output unit 34 is activated during a print execution operation for printing a stereo pair image, measurement information, and the like. The print output unit 34 outputs data to be printed to the printing apparatus 70 via a print driver (not shown). For this reason, printing of topographic relief maps, photo maps and geographic information with measurement lines and measurement information superimposed, printing of topographic relief maps with superimposed polygons, photo maps and geographic information, and printing of measurement information only, etc. Is possible.

  Next, processing performed in each mode by the stereo pair image display processing apparatus 100 will be described based on the flowcharts shown in FIGS. 13 and 14. This flowchart constitutes a part of the program PR. FIG. 13 and FIG. 14 illustrate processing in the measurement mode, polygon drawing mode, and profiler mode. The CPU 97 performs processing in each mode by executing this flowchart constituting the program PR.

First, in step S10, left-eye stereo image data LD, right-eye stereo image data RD, three-dimensional coordinate index data ID, and photographing reference position information SP are acquired.
In step S20, an initial value (N = 1) of the number of nodes N is set. Here, the number N of nodes indicates the number of nodes of a line drawn by the operation of the mouse 93 in each mode (that is, the number of points through which the line passes). In step S30, it is determined whether or not a position has been designated. If there is no position designation, the process proceeds to step S150, where it is determined whether or not there is an end operation (confirmation operation) by the confirm button 50.

  Then, for example, the reader operates the mouse 93 to designate the first position (start point) on the stereo image LG for drawing. Then, in step S30, it is determined that there is a position designation, and the process proceeds to step S40.

  In step S40, the left-eye image coordinates (jn, kn) at the designated position are calculated. Specifically, the image coordinate calculation unit 23 calculates the left-eye image coordinates (jn, kn) at the specified position. Since this is the starting point, the image coordinates (j1, k1) are calculated.

In step S50, the three-dimensional coordinates (Xn, Yn, Zn) corresponding to the image coordinates (jn, kn) are extracted with reference to the index data ID.
In step S60, the image coordinates (pn, qn) for the right eye corresponding to the three-dimensional coordinates (Xn, Yn, Zn) are calculated using the photographing reference position information SP.

  In the next step S70, it is determined whether or not the number of nodes N ≧ 2. Since this time is the case where the first start point is designated, the number of nodes N = 1, and a negative determination is made. Therefore, the process proceeds to step S80, and the number of nodes N is incremented (N = N + 1). That is, since it is possible to draw a line connecting two points for the first time when the number of nodes N ≧ 2, drawing processing (steps S90 to S130) (processing in the one-dot chain line frame in FIG. 13) is performed until the two points are aligned. Do not proceed to).

  Then, when the reader designates the next point by drawing with the mouse 93 for drawing, it is determined in step S30 that the position has been designated, and the left-eye image coordinates (jn, kn) (for example (( j2, k2)) is calculated (S40), and three-dimensional coordinates (Xn, Yn, Zn) (for example, (X2, Y2, Z2)) corresponding to the image coordinates (jn, kn) are extracted (S50). Further, the image coordinates (pn, qn) (for example, (p2, q2)) for the right eye corresponding to the three-dimensional coordinates (Xn, Yn, Zn) are calculated (S60). When the two points are obtained in this way, it is determined in step S70 that the number of nodes N ≧ 2 is established, and the process proceeds to the drawing process (S90).

  In the drawing process, first, in step S90, a vector connecting the two points of the image coordinates (jn-1, kn-1) and (jn, kn) for the left eye is generated. This vector generation processing is performed in detail by the first vector generation unit 27A.

  In the next step S100, the left-eye stereo image and a vector-based route (line) are superimposed. Specifically, the first superimposition processing unit 28A generates path data (diagram data) that is an image for drawing a measurement line or one line segment of a polygon defined by the vector based on the vector for the left eye, The left-eye stereo image data LD and the route data are superimposed.

  In step S110, a superimposition process is performed on the stereo image for the right eye and the route (line) based on the vector. Specifically, the second superimposition processing unit 28B generates path data (diagram data) that is an image for drawing a measurement line or a line segment of a polygon defined by the vector based on the vector for the right eye, The right-eye stereo image data RD and the route data are superimposed. Thus, the left-eye stereo image data LD on which the path between the two points designated by the reader 93 is superimposed and the right-eye stereo image data RD on which the path is superimposed are generated.

  In step S130, the stereo pair image SG is displayed. That is, the display processing unit 29 displays the left-eye stereo image LG based on the left-eye stereo image data LD on which the route is superimposed in the first display area 41, and the right-eye stereo image data RD on which the route is superimposed. The right-eye stereo image RG based thereon is displayed in the second display area 42.

  As a result, for example, in the measurement mode, a measurement line (straight line) based on the mouse operation (cursor operation) is drawn on the left-eye stereo image LG in FIG. 15 and the left-eye stereo image on the right-eye stereo image RG. A stereoscopically viewable measurement line corresponding to the measurement line (straight line) on LG is automatically drawn on the right-eye stereo image. Therefore, the reader can also stereoscopically view the measurement line when stereoscopically viewing the stereo images LG and RG. In the present embodiment, the processes of steps S40, S90, S100, and S130 correspond to the first drawing process stage. Further, the processes of steps S50, S60, S110, S120, and S130 correspond to the second drawing process stage.

In the next step S140, processing according to the mode is performed. This process is performed by the CPU 97 executing a subroutine shown in FIG.
First, in step S210, the mode is determined. In this example, it is determined which one of “measurement mode”, “polygon drawing mode”, and “profiler mode” is designated.

For example, as shown in the screen 40 of FIG. 15, if the measurement mode is the measurement check box 45 selected, the process proceeds to step S220.
In step S220, the cumulative distance L, altitude difference H, azimuth angle α, inclination angle θ, and area S are calculated and output based on the three-dimensional coordinates (X1, Y1, Z1) to (Xn, Yn, Zn). Here, when drawing a measurement line between two points, the end point (Xn, Yn, Zn) is (X2, Y2, Z2). In this case, the measurement information calculation unit 26 calculates each data L, H, α, θ based on the coordinates of the start point and end point of the measurement line. When a closed route is drawn, the measurement information calculation unit 26 (specifically, the area calculation unit 26E) calculates the area S based on the coordinates of each point that becomes a node of the closed route. These pieces of data L, H, α, θ, and S (measurement information) are used for drawing a character string of the measurement information (steps S230 to S260 in the one-dot chain line in FIG. 14) and to the outside. Is output for data output.

In step S230, the left eye display position (image coordinates) of the character string of the data L, H, α, θ, S is calculated.
In step S240, the left-eye stereo image data LD on which the route is superimposed and the character strings of the data L, H, α, and θ are superimposed. In this superimposition process, the character strings of the data L, H, α, θ, and S are superimposed on the left-eye display position in the left-eye stereo image data LD. The first superimposition processing unit 28A performs the superimposition process on the left-eye stereo image.

In step S250, the right eye display position (image coordinates) of the character string of the data L, H, α, θ, S is calculated.
In step S260, the right-eye stereo image data RD on which the route is superimposed and the character strings of the data L, H, α, θ, and S are superimposed. That is, the second superimposition processing unit 28B superimposes the character strings of the data L, H, α, θ on the right-eye display position in the right-eye stereo image data RD.

  In step S270, the stereo pair image SG is displayed. That is, the display processing unit 29 displays the left-eye stereo image LG based on the left-eye stereo image data LD on which the character string of the route and the measurement information is superimposed on the first display area 41, and the character string of the route and the measurement information. Is displayed in the second display area 42 based on the right-eye stereo image data RD on which the right eye is superimposed.

  As a result, for example, in the measurement mode, the measurement line (straight line) based on the mouse operation (cursor operation) and the character string of the data L, H, α, θ are displayed on the left-eye stereo image LG in FIG. Measurement lines (straight lines) that can be stereoscopically viewed with respect to the measurement lines and character strings on the left-eye stereo image LG and the character strings of the data L, H, α, and θ are drawn on the right-eye stereo image. Automatically drawn. When a closed path (polygon) is drawn, the area of the area (polygon area) surrounded by the closed path is calculated by the area calculation unit 26E, and the character string of the area S, which is the calculation result, is calculated. Is superimposed on both stereo images LG and RG. Therefore, the reader can also stereoscopically view the measurement line and the character string when stereoscopically viewing the stereo images LG and RG. In this flowchart, the measurement line and the character string are separately superimposed, but a configuration in which they are superimposed together can also be employed.

  For example, as shown in the screen 40 of FIG. 16, if the polygon drawing check box 46 is selected, the process proceeds to step S280 as a result of the mode determination in step S210.

  In step S280, the three-dimensional coordinates (Xn, Yn, Zn) are vectorized. This processing is performed by the vectorization unit 30. The vectorization unit 30 acquires the three-dimensional coordinates (Xn, Yn, Zn) of the nodes (points) constituting the polygon being drawn on the stereo image from the three-dimensional coordinate extraction unit 24, and acquires the acquired three-dimensional coordinates ( Xn, Yn, Zn) is converted into vector format data (polygon data PD).

In step S290, vector format three-dimensional coordinate data is output.
Thus, each time a polygon node is designated by the operation of the mouse 93, the data of the three-dimensional coordinates (Xn, Yn, Zn) of the node (designated position) is vectorized (S280), and vector format data is output. (S290). As a result, polygon data PD as shown in FIG. 17 is generated and saved as a file in the save destination designated by the save destination designation unit 47. When the polygon data PD is read by the CAD device 80, the polygon PG based on the polygon data PD can be transferred onto the map image MP displayed on the monitor 81 of the CAD device 80 as shown in FIG. it can. For this reason, the polygon PG can be accurately transferred onto the map image MP.

  On the other hand, as shown in the screen 40 of FIG. 18, for example, if the profiler mode is the profiler check box 54 selected, the process proceeds to step S300 as a result of the mode determination in step S210.

  In step S300, a vector between two points of altitudes Zn-1 and Zn is generated. Specifically, the section line calculation unit 32 calculates the altitudes Zn-1 and Zn with reference to the index data ID based on the image coordinates (jn-1, kn-1) and (jn, kn) of the designated position. To do. Then, vectors having elevations Zn-1 and Zn as start points and end points are generated. At this time, a vector is generated by appropriately scaling the altitudes Zn-1 and Zn and the plot interval on the horizontal axis according to the horizontal axis adjustment magnification and the vertical axis adjustment magnification input and designated by the reader.

  In the next step S310, a cross-sectional line based on the vector is displayed. Specifically, the display processing unit 29 displays the line segment defined by the vector in the profiler display area 55 of the screen 40 shown in FIG.

  In this way, in the profiler mode, the path is drawn on the left-eye and right-eye stereo images LG and RG at the display positions at which stereoscopic viewing is possible. In the profiler display area 55, the cross-sectional line 56 in the path drawn on the stereo image LG is automatically drawn.

As described above in detail, according to this embodiment, the following effects can be obtained.
(1) Three-dimensional coordinates are extracted from image coordinates at a designated position designated on one stereo image (reference image), and the extracted three-dimensional coordinates are coordinated to the image coordinate system of the other stereo image (relative image) The image coordinates of the corresponding display position that can be stereoscopically viewed on the other stereo image are obtained by conversion. Then, a graphic element such as a line, a character, or a polygon drawn by operating the mouse 93 on one stereo image is automatically drawn at a display position of a stereoscopic image in the other stereo image. Accordingly, it is possible to stereoscopically view a graphic element such as a line, a character, or a polygon drawn on one stereo image LG while stereoscopically viewing the stereo pair image SG, so that a background image such as a topographic relief map or a photographic map can be displayed. Work such as drawing and measurement for the purpose of transfer and the like can be performed while stereoscopically viewed.

  (2) Three types of coordinate data ED, ND, having the same image coordinate system as the image coordinate system of one of the stereo images constituting the stereo pair image SG, each having X, Y, and Z as coordinate values. An index data ID consisting of ZD was prepared. Therefore, by referring to the index data ID from the image coordinates of the designated point, the three-dimensional coordinates of the point can be easily extracted. Then, display position coordinates that can be stereoscopically viewed in the other stereo image can be acquired by a relatively simple calculation process that performs coordinate conversion of the extracted three-dimensional coordinates. Therefore, there are relatively few operations when performing drawing and measurement, and access to data necessary for display and operation can be reduced. As a result, operation on a low-spec personal computer or network becomes possible.

  (3) Graphic elements (dots, line segments, polygons, characters, etc.) drawn with the stereo pair image SG can be acquired as graphic elements in the original three-dimensional coordinate system. For example, three-dimensional coordinate data of a graphic element can be output as polygon data PD, and the graphic element can be displayed at a corresponding position on a map image displayed on the CAD device. For this reason, the graphic element drawn while stereoscopically viewing the stereo pair image SG can be accurately transferred to the map on the monitor of the CAD device.

  (4) By simply drawing a measurement line or polygon by operating the mouse on the stereo pair image SG, the accumulated distance L, altitude difference H, inclination angle θ, azimuth angle α, Measurement information such as the area S can be calculated. Further, the measurement information can be displayed in stereo by superimposing it on a background image such as a topographic relief map that is stereoscopically viewed.

  (5) As a background image (colored image) when creating the stereo pair image SG, for example, a plurality of topographic relief maps, photographic maps, geographic information, etc., and switching the background image to be displayed in the same stereoscopic space Can do. Therefore, by switching the background image of the same place as desired between topographic relief maps, photo maps, geographic information, etc. while stereoscopically viewing the background image, the target to be transferred, such as landslides and active faults, is more accurate. It becomes easy to grasp.

  (6) The three-dimensional coordinates in the route (line segment or cursor movement position) designated by the stereo pair image SG can be extracted, and the cross-sectional line (cross-sectional shape) cut along the route can be displayed. Therefore, it is possible to acquire the topographic cross-section information, and to check whether the measurement location and the transfer target are correct with reference to the cross-section information.

  (7) Index data ID (three-dimensional) suitable for the function of creating a stereo pair image SG from three-dimensional coordinate data (numerical elevation data) and extracting the original three-dimensional coordinates from only one of the stereo images LG Coordinate data). For this reason, three-dimensional coordinate data having a smaller data amount than the digital elevation data is sufficient.

  (8) Stereo images LG and RG are displayed on the monitor 95 using the stereoscopic pair images (for the right eye and for the left eye) created based on the digital elevation information (three-dimensional coordinate data) and the index data ID. However, it is possible to perform single point measurement, vector measurement, area measurement, polygon creation, and cross-section measurement in the same coordinate space as the original three-dimensional coordinate data without using a high-performance system by using the cursor means such as the mouse 93. it can.

  (9) In the interpretation of terrain such as landslides and active faults, the undulations can be clearly visualized by stereoscopically viewing the numerical terrain data obtained from the aviation laser survey results. Compared to conventional aerial photograph interpretation and two-dimensional output diagrams (contour maps, stepped shades, etc.) by aerial laser surveying, it is possible to perform interpretation with higher quality. Further, measurement (measurement) and data recording of interpretation results can be performed while stereoscopically viewing, and at the same time, graphic elements (for example, polygon data PD) in the original three-dimensional coordinate space can be acquired. For this reason, the transfer of the interpretation result, which has been performed in the conventional photo interpretation, can be eliminated. Furthermore, enlargement, reduction, image switching, and the like can be performed in a stereoscopic manner, and information on the accuracy of interpretation and the relevance to the surrounding situation can be obtained.

  (10) Simple numerical elevation data (three-dimensional terrain coordinate data) can be reproduced and output from the index data ID. For this reason, even if it is not necessary to store enormous numerical elevation data in the PC 90 for stereo pair image display, it is possible to obtain numerical elevation data from the index data ID if necessary, although it is simple.

The said embodiment is not limited above, It can also change into the following aspects.
The drawing content is not limited to a point, a line segment (vector), or a polygon, but may be a region (for example, a region with a color inside) or a symbol such as a map symbol.

  The background image used for the stereo pair image is not limited to an image (geographic image) relating to the terrain such as a topographic relief map, a photographic map, and geographic information. A microscopic image (microscopic space image), an astronomical telescope image (celestial map), or the like may be used. Further, in the case of a photograph or the like, a feature such as a building may be included.

  Measurement information includes the altitude Z of the designated point, the cumulative distance (distance between two points or path length) of the drawing line (measurement line), altitude difference H (height difference), inclination angle θ, azimuth angle α, and area S At least one of the above can be adopted. For example, only one of distance, path length, altitude difference, inclination angle, direction, and area may be displayed. In this case, the display of the measurement information does not necessarily need to be stereoscopically viewable.

A configuration in which the switching function of the stereo pair image SG by the image switching unit 22 is eliminated can also be implemented. For example, only one type of stereo pair image may be displayed.
The three-dimensional coordinate data is not limited to DEM but may be TIN (triangulated irregular network). Furthermore, an ortho image, DTM (Digital Terrain Model), and DSM (Digital Surface Model) may be used.

  -Form arrangement and operation flow on the screen 40 can be changed as appropriate.

  DESCRIPTION OF SYMBOLS 10 ... Stereo pair image creation apparatus, 11 ... 1st creation part, 12 ... 2nd creation part, 13 ... Center projection conversion part, 14 ... Image coordinate conversion part, 15 ... Raster data conversion part, 20 ... Example of storage means A certain buffer, 21... Main control section constituting image display means, 22... Image switching section which is an example of switching means, 23... Image coordinate calculation section constituting first drawing processing means, 24. Three-dimensional coordinate extraction unit constituting means, 25... Stereo image coordinate computation unit constituting second drawing processing means, 26... Measurement information computation unit as an example of measurement information acquisition means, 27. ... Superimposition processing unit constituting an example of first display processing means, 28A ... First superimposition processing part constituting first drawing processing means, 28B ... Second superposition processing part, 29 ... Image display means, first display processing Configure an example of means Display processing unit, 30... Vectorization unit, 31... Output unit as an example of output means, 32... Section line calculation unit as an example of second display processing means, 33. 34 ... Print output section, 40 ... Screen, 41 ... First display area, 42 ... Second display area, 48 ... Image change button, 49 ... Move button, 50 ... Confirm button, 53 ... Output button, 55 ... Profiler display area , 56 ... sectional line, 80 ... CAD device, 81 ... monitor, 90 ... personal computer, 91 ... main body, 92 ... keyboard constituting one example of operation means, 93 ... mouse constituting one example of operation means, 94 ... operation means An operation unit constituting one example, 95... Monitor as an example of display means, 96... Computer, 97... CPU, 98. Stereo pair image display processing apparatus as an example, PR ... program, SD ... stereo pair image data, SD1 ... stereo pair image data of topographic relief map as an example of the figure, SD2 ... stereo pair image of a photographic map as an example of a photograph Data, SD3 ... stereo pair image data of geographic information as an example of the figure, LD ... stereo image data for left eye as an example of reference image data, RD ... stereo image data for right eye as an example of relative image data, SG, SG1 SG2 ... stereo pair image, LG ... left eye stereo image as an example of the first image, RG ... right eye stereo image as an example of the second image, ID ... three-dimensional coordinate index data, L ... cumulative distance, H ... Altitude difference, α ... azimuth angle, θ ... tilt angle, S ... area, PD ... polygon data, MP ... map image, PG ... polygon, Z ... elevation value

Claims (9)

A stereoscopic image display processing device for displaying on a display means a stereo pair image capable of stereoscopically viewing a two-dimensional image of a figure or a photograph,
Image display means for displaying the first image and the second image constituting the stereo pair image side by side on the display means;
When one of the first image and the second image whose position is designated by the operation of the operation means is a reference image and the other is a relative image, the drawing is performed at the first display position designated by the operation of the operation means First drawing processing means for
The second display position in the relative image that is stereoscopically related to the first display position of the reference image is obtained, and the second display position corresponds to the drawing content at the first display position. A second drawing processing means for drawing the drawing contents;
A stereoscopic image display processing device comprising: Measurement information acquisition means for acquiring measurement information defined by a drawing line drawn as the drawing content in the reference image;
2. The stereoscopic image display according to claim 1, further comprising first display processing means for displaying the measurement information at each display position in the first image and the second image that are stereoscopically viewable. Processing equipment.   The display device further comprises second display processing means for acquiring an elevation value corresponding to the coordinates of the point designated as a node of the drawing line by the operation means and displaying a cross-sectional shape cut by the drawing line based on the elevation value. The stereoscopic image display processing device according to claim 2.   The stereoscopic image display processing apparatus according to claim 2, further comprising an output unit that outputs three-dimensional coordinate data of the drawing line.   5. The stereoscopic image display processing apparatus according to claim 2, further comprising a switching unit that switches a type of a two-dimensional image displayed on the display unit as the stereo pair image. 6. Storage means for storing reference image data for displaying the reference image, and three-dimensional coordinate data in which three-dimensional coordinates corresponding to the image coordinates of the reference image data are defined;
The second drawing processing unit obtains a three-dimensional coordinate corresponding to the image coordinate of the point designated in the reference image by the operation unit with reference to the three-dimensional coordinate data, and corresponds to the three-dimensional coordinate The stereoscopic image display processing apparatus according to claim 1, wherein image coordinates in the relative image to be obtained are obtained and drawn at the image coordinates in the relative image.   The three-dimensional coordinate data is stored separately for each display area of the reference image, and using the three-dimensional coordinate data, reproduction means for reproducing three-dimensional terrain coordinate data having a resolution equal to the image resolution of the reference image. The stereoscopic image display processing device according to claim 6, further comprising: A stereoscopic image display processing method for displaying on a display means a stereo pair image capable of stereoscopically viewing a two-dimensional image of a figure or a photograph,
An image display step for displaying the first image and the second image constituting the stereo pair image side by side on the display means;
When one of the first image and the second image whose position is designated by the operation of the operation means is a reference image and the other is a relative image, the drawing is performed at the first display position designated by the operation of the operation means A first drawing process stage,
The second display position in the relative image that is stereoscopically related to the first display position of the reference image is obtained, and the second display position corresponds to the drawing content at the first display position. A second drawing processing stage for drawing drawing contents;
A stereoscopic image display processing method characterized by comprising: A program for causing a computer to execute a stereoscopic image display process for displaying a stereo pair image of a two-dimensional image of a figure or a photograph on a display means,
On the computer,
An image display step for displaying the first image and the second image constituting the stereo pair image side by side on the display means;
When one of the first image and the second image whose position is designated by the operation of the operation means is a reference image and the other is a relative image, the drawing is performed at the first display position designated by the operation of the operation means A first drawing process stage,
The second display position in the relative image that is stereoscopically related to the first display position of the reference image is obtained, and the second display position corresponds to the drawing content at the first display position. A second drawing processing stage for drawing drawing contents;
A program for running