JPH0650736A - Stereo image measuring device - Google Patents

Abstract

PURPOSE:To obtain a stereo image measuring device which displays a stereo image and especially can perform a correlation processing on the display screen after extracting a feature point near a cursor position. CONSTITUTION:A stereo image storage part stores at least one pair of stereo images and a display part displays the stereo images stored at the stereo image storage part. A cursor movement part transfers a cursor to the stereo images displayed at the display part, a feature extraction part 291 extracts a feature point near a cursor position at one stereo image out of the stereo images, and the feature point is determined as a measurement point. Then, a correlation processing part 292 searches for the corresponding point of another image corresponding to the measurement point of one stereo image and the display part applies a mark to an obtained corresponding point based on the measurement point and a correlation processing result.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention displays stereo images,
The present invention relates to a stereo image measuring device that performs correlation processing on the display screen, and more particularly to a stereo image measuring device that can perform correlation processing after extracting feature points near the cursor position.

[0002]

2. Description of the Related Art Conventionally, a technique for analyzing a stereo image has been used in the field of photogrammetry, etc., and particularly used for creating a topographic map.

When analyzing this stereo image, it is necessary to search for any one of the left and right positions and the corresponding point of the other corresponding to this position. For the search of the corresponding point, a visual method or The correlation method was used.
In any of these retrieval methods, only a part of the stereo image is stereoscopically displayed.

[0004]

However, in the conventional method of displaying a partial image of a stereo image, the measurement points are manually specified by the measurer, so that there is a feature suitable for the correlation. It happened.

Therefore, even if the correlation processing for obtaining the corresponding points is performed, the corresponding points may not be surely obtained.
There has been a strong demand for the appearance of a stereo image measuring device capable of reliably searching for corresponding points.

[0006]

The present invention has been devised in view of the above problems, and a stereo image storage unit for storing at least a pair of stereo images, and a stereo image stored in the stereo image storage unit. A display unit for displaying, a cursor moving unit for moving a cursor in the stereo image displayed on the display unit, and a cursor position near one of the stereo images displayed on the display unit. In the above, a feature extraction unit for performing feature point extraction and determining the feature point as a measurement point, and a correlation processing unit obtained by a correlation process for searching for a corresponding point of another image corresponding to the measurement point of the one image Then, the display unit is configured to add a mark to the corresponding point obtained based on the measurement point and the correlation processing result.

The present invention also provides a stereo image storage unit for storing at least a pair of stereo images, and a stereo image having a first display area and stored in the stereo image storage unit at a first magnification. A first display unit for displaying, a cursor moving unit for moving a cursor in the stereo image displayed on the first display unit, and a second display area smaller than the first display area. And the first
A second display unit for displaying a stereo image within a range near the cursor at a second magnification larger than the magnification of
In the vicinity of the cursor position in one of the stereo images displayed on the display unit, a feature point is extracted and a feature extraction unit for determining the feature point as a measurement point, and a measurement point of the one image. The correlation processing unit which is obtained by the correlation processing for searching the corresponding points of other corresponding images, and the first and second display units mark the measurement point of the cursor unit and the corresponding points based on the correlation processing result. It is configured to be attached.

Furthermore, the present invention connects the measuring point of the previous measurement and the measuring point of the present measurement, and the connecting means for connecting the corresponding point obtained by the correlation processing of the previous measurement and the corresponding point of the present measurement. Can also be provided.

[0009]

According to the present invention configured as described above, the stereo image storage unit stores at least a pair of stereo images, the display unit displays the stereo images stored in the stereo image storage unit, and the cursor moving unit , The cursor is moved in the stereo image displayed on the display unit, and the feature extraction unit performs feature point extraction near the cursor position in one of the stereo images displayed on the display unit, and the feature point is extracted. Is determined as the measurement point. Then, the correlation processing unit searches for a corresponding point of another image corresponding to the measurement point of one image, and the display unit marks the obtained corresponding point based on the measurement point and the correlation processing result. Has become.

Further, according to the present invention, the stereo image storage unit stores at least a pair of stereo images, and the first display unit having the first display area stores the stereo image stored in the stereo image storage unit at the first magnification. Is displayed, the cursor moving unit moves the cursor in the stereo image displayed on the first display unit, and the second display unit having a second display area smaller than the first display area displays the first Second larger than magnification
Displays a stereo image in the area near the cursor at a magnification,
The feature extraction unit extracts feature points near the cursor position in one of the stereo images displayed on the second display unit, and determines the feature points as measurement points. Then, the correlation processing unit searches for a corresponding point of another image corresponding to the measurement point of one image, and the first and second display units
Marks are attached to the measurement points of the cursor and the corresponding points based on the correlation processing result.

Further, according to the present invention, the connection means connects the measurement point of the previous measurement and the measurement point of the present measurement, and also connects the corresponding point obtained by the correlation processing of the previous measurement and the corresponding point of the present measurement. You can also

[0012]

【Example】

An embodiment of the present invention will be described with reference to the drawings.

"Stereo image measuring method"

FIG. 9 shows the basic principle of a stereo image measuring method. When the left image 100 and the right image 200 after the deviation correction in which the tilts of the left and right images are corrected are displayed on a 3D display, a three-dimensional model is displayed. Is displayed, and stereoscopic measurement is possible. These images have the same Y without vertical parallax.
Since the coordinates are provided, if the parallax in the X direction is associated, the three-dimensional coordinates can be obtained by the principle of triangulation. That is, as shown in FIG. 9, measurement points (cursors) are displayed in a superimposed manner in the left and right images, and the point to be measured with the three-dimensional mouse is displayed in the left image 1.
00, and move only the cursor in the right image 200 to X.
It is moved in the direction (up and down) to match the surface of the object.

There is a visual method that depends on the stereoscopic ability of the user for the correspondence in the stereoscopic vision.
It is also possible to perform an automatic search process using image correlation or the like for comparing the similarity between the left and right image densities. The automatic search process using this electronic computer is generally called stereo matching.

Next, the stereo image measuring apparatus 1 will be described with reference to FIG. The stereo image measuring device 1 is composed of a control device body 2, a left photo optical disc drive 31, a right photo optical disc drive 32, and a 3D monitor 4.

The control device body 2 is an arithmetic processing device having a central processing unit, a memory and the like, and controls the entire stereo image measuring device 1. The internal configuration of the control device body 2 will be described in detail later. Optical disk drive 3
Is composed of an optical disc drive 31 for the left photograph and an optical disc drive 32 for the right photograph. The optical disc drive 3 is for storing a large amount of image data from an external scanner or the like. The left photo optical disc drive 31 corresponds to a memory unit for storing left stereoscopic image data, and the right photo optical disc drive 32 corresponds to a memory unit for storing right stereoscopic image data. It is a thing. As long as it is a large-capacity memory, not only the optical disc drive but any storage means can be adopted.

The 3D monitor 4 corresponds to a monitor section and is capable of stereoscopic viewing. 3D monitor 4
The left image high resolution display 41, the right image high resolution display 42, and the half mirror 43 are included. A polarizing filter 411 is attached to the front surface of the left image high resolution display 41, and a polarizing filter 421 is attached to the front surface of the right image high resolution display 42. The polarization characteristics of the polarization filter 411 and the polarization filter 421 are configured to be orthogonal to each other, and the user stereoscopically views the target image by observing with polarization glasses having polarization characteristics that are orthogonal to each other on the left and right. You can

Next, the electrical construction of the controller body 2 will be described with reference to FIG.

The control device main body 2 includes a processing command unit 20, a buffer memory 21a, a buffer memory 21b, a main image memory 22a, a main image memory 22b, a sub-image memory 23a, a sub-image memory 23b, and a main image memory 23b. Line drawing / cursor memory 24a, main line drawing / cursor memory 24b, sub line drawing / cursor memory 25a, sub line drawing / cursor memory 25b, memory controller 26a, and memory controller 26
b, the combining unit 27a, the combining unit 27b, the D / A converter 28a, the D / A converter 28b, and the feature extracting unit 291.
And a correlator 292.

The buffer memory 21a and the main image memory 2
2a, a sub image memory 23a, a main line drawing / cursor memory 24a, a sub line drawing / cursor memory 25a, a memory control unit 26a, a combining unit 27a, and a D / A converter 28a.
Is an electrical configuration of the left image system, and is connected to the high resolution display (left monitor) 41 for the left image.

Similarly, the buffer memory 21b, the main image memory 22b, the sub image memory 23b, the main line drawing / cursor memory 24b, and the sub line drawing / cursor memory 25b.
The memory control unit 26b, the synthesizing unit 27b, and the D / A converter 28b have an electrical configuration of the right image system and are connected to the high-resolution display (right monitor) 42 for the right image. .

The high-resolution display (left monitor) 41 for the left image is divided into a main screen 411 and a sub-screen 412, and the main screen 411 corresponds to the first display section.
For displaying the stereo image stored in the stereo image storage unit at the first magnification.
The sub screen 412 corresponds to the second display unit, and the main screen 412
It has a second display area smaller than 11, and is for displaying a stereo image within the range displayed on the main screen 411 at a second magnification larger than the first magnification.

Similarly, the high-resolution display for right image (right monitor) 42 is divided into a main screen 421 and a sub-screen 422, and the main screen 421 has a first display area and is stereo at a first magnification. An image is displayed, and the sub screen 422 has a second display area smaller than that of the main screen 421, and displays a stereo image within the range displayed on the main screen 421 at a second magnification larger than the first magnification. It is for display.

The processing command section 20 includes a central processing unit and the like,
The control device main body 2 is for controlling each electrical configuration.

The buffer memory 21a corresponds to a memory unit or a stereo image storage unit, and is for reading image data for performing stereo image processing from the left photo optical disk drive 31 and temporarily storing it. .

The main image memory 22a corresponds to the main image memory unit, and displays image data for displaying the left stereoscopic image at the first magnification on the main screen 411 which is the first display range of the left monitor 41. It is for memory.

The sub-image memory 23a corresponds to the sub-image memory unit, and displays image data for displaying the left stereoscopic image at the second magnification on the sub-screen 412 which is the second display range of the left monitor 41. It is for memory.

The main line drawing / cursor memory 24a has the same capacity as the main image memory 22a, and is for displaying white pixels only in the position where the line drawing and cursor are present. The sub-line drawing / cursor memory 25a has the same capacity as the sub-image memory 23a, and is for displaying white pixels only in the line drawing and the cursor existing position.

The memory control unit 26a includes a buffer memory 2
1a and the like, and based on the screen magnifications of the main screen 411 and the sub screen 412, the main image memory 22a and the sub image memory 2
It is for controlling 3a and 3a.

The synthesizing section 27a synthesizes the image data of the main image memory 22a, the sub-image memory 23a, the main line drawing / cursor memory 24a and the sub line drawing / cursor memory 25a,
It is for forming composite image data, and is configured to output the composite image data to the left monitor 41 via the D / A converter 28a.

Similarly, as the right image system, the buffer memory 2
1b, main image memory 22b, sub image memory 23b, main line drawing / cursor memory 24b, and sub line drawing / cursor memory 2
5b, a memory control unit 26b, a synthesizing unit 27b, and a D / A converter 28b exist, but the description is omitted because it is the same as the electrical configuration of the left image system replaced with the right image.

The feature extraction unit 291 is for extracting the features of the image from the image data. In this embodiment, the values of the nine pixels near the designated point are subjected to signal processing by a Laplacian Gaussian filter. The feature extraction method is adopted. This Laplacian Gaussian filter is equivalent to digital image filtering, and is a type of spatial filter that performs processing in the same space as the image space. The Laplacian Gaussian filter corresponds to a second order differential operation, and calculates differences in four directions centering on a certain point. As a result, it is possible to extract a portion having a sharp change in density as a feature.

The correlator 292 corresponds to a correlation processing unit and performs an automatic search process using image correlation for comparing the similarity between the left and right image densities. The details of the correlation processing will be described later.

The input unit 293 instructs the process command unit 20 to
This is for inputting instructions for setting various magnifications and moving the cursor. This input unit 293 is a keyboard,
Any type of input means such as a mouse can be adopted.

The operation of the present embodiment configured as described above will be described with reference to FIG. When you start the 3D measurement process,
First, in step 1 (hereinafter abbreviated as S1), the left photo optical disc drive 31 sends a left stereoscopic image to be processed to the buffer memory 21a. Similarly, the right photo optical disk drive 32 sends the right stereoscopic image to be processed to the buffer memory 21b. The image to be sent is selected by the selected image designation signal (a) from the input unit 293.
Is transmitted to the processing command unit 20 to be executed.

Next, in S2, the input unit 293 sets and inputs the main screen magnification (LMAG) of the main screen 411 and the main screen 421. In this embodiment, the main screen magnification (LMAG) is
Although it is configured to select any value of (1/2, 1/3, ...), any method can be used as long as it can determine the main screen magnification (LMAG). can do. The main screen magnification (LMAG) is set using the input unit 29.
The main screen magnification designation signal (b) from the processing command unit 20
It is executed by transmitting to the memory control unit 26a and the memory control unit 26b via the.

Next, in S3, the processing command unit 20 transfers the left image data from the buffer memory 21a to the main image memory 22a at an address interval according to the main screen magnification (LMAG). Similarly, the right image data is transferred from the buffer memory 21b to the main image memory 22b. The memory control unit 26a controls the address interval of the left image data read from the buffer memory 21a by the address interval determination signal (c). Similarly, the memory control unit 2
6b controls the address interval of the right image data read from the buffer memory 21b. And the main screen magnification (LM
The address interval increases as AG) decreases, and a reduced image is formed on the main image memory 22b.

In S4, the sub-screen magnification (HMAG) of the sub-screen 412 and the sub-screen 422 is set and input by the input unit 293. In this embodiment, sub-screen magnification (HMAG)
Is configured to select any value of (1, 2, 3, ...), but any method can be adopted as long as it can determine the sub-screen magnification (HMAG). You can
The setting of the sub-screen magnification (HMAG) is executed by transmitting the sub-screen magnification designation signal (d) from the input unit 293 to the memory control unit 26a and the memory control unit 26b via the process commanding unit 20. . Subscreen magnification (HMA
G) is set higher than the main screen magnification (LMAG).

Next, in S5, a cursor movement signal (e) is input from the input unit 293 to move the cursor. Then, as shown in FIG. 4A, on the main screen 411 and the main screen 421, the main image rough measurement point LP (I, J) of the left image and the main image rough measurement point RP (K, J) of the right image are displayed. Is specified. That is, the operator moves the left and right cursors so as to locate the cursor on the measurement point while looking at the screen of the monitor 4, and specifies the measurement point. After designation LP (I, J), RP
A square frame indicating the measurement range of the sub screens 412 and 422 centering on (K, J) is displayed on the main screens 411 and 421. In this embodiment, five main image rough measurement points are set, and the main image rough measurement point LP (I, J) of the left image is
P1, P2, P3, P4, P5, and the main image approximate measurement points RP (K, J) of the right image are P1 ', P2',
They are P3 ', P4', and P5 '. Below, P1, P
The measurement is performed one by one in the order of 2, P3, P4, and P5.

The input unit 293 and the processing command unit 20 are
The operation of the cursor moving unit for moving the cursor on the main screens 411 and 421 is performed.

Then, in S6, the processing command unit 20 transfers the left image data from the buffer memory 21a to the sub-image memory 23a at an address interval according to the sub-screen magnification (HMAG). Similarly, the right image data is transferred from the buffer memory 21b to the sub image memory 23b. Further, the memory control unit 26a receives the address interval determination signal (c),
The address interval of the left image data read from the buffer memory 21a is controlled. Similarly, the memory control unit 26b controls the address interval of the right image data read from the buffer memory 21b. Then, as the sub-screen magnification (HMAG) increases, the address interval decreases, and an enlarged image is formed on the sub-image memory 23b.

Next, in S7, the feature extraction on the left sub-screen 412 is performed. This feature extraction is executed by the Laplacian Gaussian filter of the feature extraction unit 291.

Then, in S8, as shown in FIG. 4B, the reference measurement point whose feature is extracted on the left sub-screen 412 is set to LP (I
a, Ja).

Further, in S9, the correlation processing is performed by the correlator 292. The absolute difference method, the correlation coefficient method, etc. are generally used for the correlation processing. That is, as shown in FIG. 4C, the reference measurement point LP (Ia, J) of the left sub-screen 412 determined in S8.
corresponding point RP (Ka, J) of the right sub-screen 422 corresponding to a)
It searches for a).

Next, in S10, the left and right image cursors are displayed. That is, the main screen 411 and the sub-screen 41 of the left monitor 41
2, the reference measurement point LP (Ia, Ja) is displayed, and the corresponding point RP (Ka, Ja) is displayed on the main screen 421 and the sub-screen 422 of the right monitor 42.

Then, in S11, stereoscopic vision is performed as shown in FIG. 4D, and the operator confirms the corresponding points. That is, if left and right images have very similar images without features, an error may occur in the correlation processing.

When an error in the corresponding point is found in S11, the process proceeds to S12, the position of the right cursor is forcibly corrected in S12, and the process proceeds to S13.

At S13, the main line drawing / cursor memory 24
A line drawing connecting the previous corresponding point and the current corresponding point and connecting the previous measuring point and the present measuring point is written in a and 24b and displayed on the main screens 411 and 421.

Then, in S14, it is determined in the present embodiment whether or not the measurement of P5 is completed. If the measurement of P5 is completed, the process proceeds to S15 and the measurement is completed.
If the measurement is not completed up to P5, the process proceeds to S16, and it is determined whether the cursor is moved. Then, when the cursor is moving, that is, when it is determined that the measurement is continued, the process proceeds to S17.

In S17, it is determined whether or not the movement of the cursor is equal to or higher than a predetermined speed or is out of the screen range of the sub-images 412 and 422. In these cases,
While proceeding to S18, the sub-screens 412 and 422 are stopped, and at the same time, returning to S5, the measurement is repeated. Further, in S17, if the movement of the cursor is not equal to or higher than the predetermined speed or is not moving out of the range of the screen, the process proceeds to S19 to scroll the sub-screens 412 and 422. Next, in S20, the rough measurement points are designated as in S5, and then the process proceeds to S7.

In this embodiment, the method of designating the five points P1 to P5 has been described, but the number can be changed to an appropriate number according to the contour of the object.

In S13, not only the corresponding points are simply connected by line segments, but also polylines can be measured. A polyline is a figure in which several line segments and line segments are connected, and the measurement points are continuously connected by line segments each time measurement is performed.

FIG. 5 shows an example in which each vertex is measured in the order from 1 to 6. At the end of the measurement, "close polyline" (FIG. 5A) is designated or "open polyline" (FIG. 5 (b)) is designated. Further, if the measurement is erroneous, addition and deletion can be performed. Further, if a constant height (Z) is given to control the distance between the left and right cursors and polyline measurement is performed, contour lines can be drawn.

Further, not only polyline measurement but also circle measurement and arc measurement can be used. For circle measurement, as shown in FIG. 6 (a), a center point A and a radius B are designated to give circle graphic data, and as shown in FIG. 6 (b), circles A and B are given. , C are specified. The arc measurement is, as shown in FIG. 7, the starting point A of the arc,
By giving an end point C and an intermediate point B on the circumference, arc figure data is given. By using such polyline measurement, circle measurement, arc measurement, or the like, there is an advantage that the contour line of the measurement object can be conveniently drawn and the figure data can be managed by some point data.

The main screen magnification (LMAG) corresponds to the first magnification, and the sub-screen magnification (HMAG) corresponds to the second magnification. Then, the input unit 293 and the processing instruction unit 20 for setting and changing these magnifications.
The memory control unit 26a and the memory control unit 26b correspond to a magnification setting unit. In this embodiment, the sub-image 4
Although it has been described that the correlation processing is used only in the measurement of 12 and 422, the correlator 292 is used in the main image memory 22.
Data is transferred from a and 22b, and the main screen 41
It is also possible to configure the cursor position by using the correlation process even in the designation of the rough measurement points on Nos. 1, 421.

Next, the correlation process of the correlator 292 will be described in detail with reference to FIG. In this embodiment, the data string near the measurement point in the reference image data of the left image is searched for a similar data string from the image data group of the right image, and the absolute difference method is adopted as the method. ing. As will be described in detail below, this method searches for a data string having the smallest absolute difference and calculates a corresponding point from the image address.

In S1 of FIG. 8, each parameter is input to the input unit 2
Input from 93. In this embodiment, the number of correlation data points N
W, search data score ISEAR, correlation comparison ABSMIN
To set. The correlation data score NW means that NW vertical and NW horizontal square reference image data are set near the measurement point of the left image. Search data score ISEAR
Indicates how many search image data, which is a data sequence of the right image corresponding to the reference image data, are arranged in the horizontal direction. In other words, NW vertical and horizontal ISEAR rectangular right images. Shows how many data strings are arranged in the horizontal direction. The correlation comparison ABSMIN is
In order to search for the case where the absolute difference to be calculated is the minimum, it is set as an initial value in numerical calculation.

Next, in S2, the number N of reference image data of the left image is calculated. In this embodiment, since the reference image data is a square, NW * NW is the number N of reference image data. In S2, the number M of pieces of search image data of the right image is M.
Is calculated. That is, like the reference image data, in the vertical direction,
Since NW pieces are arranged, the number M of pieces of search image data for the right image is NW * ISEAR.

Then, in S3, the reference image data of the left image is read as LDATA (N) from the sub image memory 23a, and the search image data of the right image is RDATA (M).
Is read from the sub-image memory 23b.

Next, in S4, the total sum of LDATA (N) is calculated and divided by N to obtain the reference image average value XMEAN.
To calculate.

Then, in S5, 1 is substituted for ICOUNT, and SEARCH is further defined. This SEARCH
Is the vertical N set in the right image corresponding to the reference image data.
This corresponds to the number of one block of the search image data of W and NW squares. Further, ICOUNT of the present embodiment indicates the number of blocks of search image data from the left.

Next, in S6, one block of NW square and NW square search image data is set in the right image, and the corresponding one block is selected from RDATA (M) of the search image data of the right image. Image data is selected, and this image data is transferred and stored as SDATA (N).

In S7, the S transferred and stored in S6 is stored.
By obtaining the sum of DATA (N) and dividing by N,
The search image average value YMEAN is calculated.

Next, in S8,

Ai = (LDATA (i) -XMEAN)
-(SDATA (N) -YMEAN)

ABS is calculated from i = 1 to N, and the total sum thereof is obtained and set as ABS.

Further, in S9, the ABS obtained in S8 is AB
It is determined whether it is smaller than SMIN. A at the judgment of S9
If BS is smaller than ABSMIN, in S10, A
ABS is substituted for BSMIN and replaced, and the value of ICOUNT at this time is stored as MATPON.

Next, in S11, ICOUNT is set to SE.
Determine if it matches ARCH. That is, ICOUNT is S
If it matches EARCH, the SDATA of each block is selected from the search image data RDATA (M) of the right image.
This means that all (N) have been read and the correlation processing has been completed. In this case, the process ends in S12, and MA
A block of search image data corresponding to ICOUNT stored in TPON becomes a block (that is, a corresponding data string) in the search image data of the right image, which corresponds to the reference image data of the left image.

Then, in S11, ICOUNT becomes SEARC.
If it does not match with H, the process proceeds to S13, and one block of the search image data is changed to the block on the right by one.
COUNT + 1 is assigned to ICOUNT and the process returns to S6.

By repeating the above operation, the ICOUNT with the smallest ABS can be determined.
The block in the search image data of the right image defined in
It is the corresponding point to be sought.

[0073]

The present invention configured as described above has a stereo image storage unit for storing at least a pair of stereo images, and a display unit for displaying the stereo images stored in the stereo image storage unit. In the vicinity of the cursor position in the cursor moving unit for moving the cursor in the stereo image displayed on the display unit, and one of the stereo images displayed on the display unit, feature point extraction is performed. A feature extraction unit for determining a feature point as a measurement point, a correlation processing unit that is obtained by a correlation process that searches for a corresponding point of another image corresponding to the measurement point of the one image, and the display unit is the measurement unit. Since it is configured to mark the corresponding points found based on the points and the correlation processing result, the correlation processing can be performed with the neighborhood of the feature points as a reference, and the corresponding points can be reliably found. There is an excellent effect that it can be.

[0074]

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a stereo image measuring apparatus 1 according to an embodiment of the present invention.

FIG. 2 is a diagram showing an electrical configuration of a control device body 2 of the present embodiment.

FIG. 3 is a diagram showing an operation of the stereo image measuring device 1 of the present embodiment.

FIG. 4 is a diagram showing a monitor screen of the stereo image measuring apparatus of this embodiment.

FIG. 5 is a diagram illustrating polyline measurement according to the present embodiment.

FIG. 6 is a diagram illustrating circle measurement according to the present embodiment.

FIG. 7 is a diagram illustrating arc measurement according to the present embodiment.

FIG. 8 is a diagram illustrating the operation of a correlator 292 of this embodiment.

FIG. 9 is a diagram illustrating a basic principle of a stereo image measuring method.

[Explanation of symbols]

 1 Stereoscopic Image Measuring Device 2 Control Device Main Body 20 Processing Command Unit 21 Buffer Memory 22 Main Image Memory 23 Sub-Image Memory 24 Main Line Image / Cursor Memory 25 Sub-Line Image / Cursor Memory 26 Memory Control Unit 27 Compositing Unit 28 D / A Converter 291 Feature extraction unit 292 Correlator 293 Input unit 3 Optical disc drive 31 Optical disc drive for left photograph 32 Optical disc drive for right photograph 4 3D monitor 41 Left monitor 411 Main screen 412 Sub screen 42 Right monitor 421 Main screen 422 Sub screen

Claims (3)

[Claims] 1. A stereo image storage unit for storing at least a pair of stereo images, a display unit for displaying the stereo images stored in the stereo image storage unit, and a stereo image displayed by this display unit. To extract a feature point in the vicinity of the cursor position in one of the stereo images displayed on the display unit and a cursor moving unit for moving the cursor therein, and to determine the feature point as a measurement point A feature extraction unit, a correlation processing unit that is obtained by a correlation process that searches for a corresponding point of another image corresponding to the measurement point of the one image, and the display unit is obtained based on the measurement point and the correlation processing result. A stereo image measuring device, characterized in that it is configured to add marks to the corresponding points. 2. A stereo image storage unit for storing at least a pair of stereo images, and a stereo image having a first display area and stored at a first magnification in the stereo image storage unit. And the first display of
A cursor moving unit for moving a cursor in the stereo image displayed on the display unit, and a second magnification larger than the first magnification and having a second display area smaller than the first display area. In the second display unit for displaying a stereo image within the cursor vicinity range, and in the vicinity of the cursor position in one of the stereo images displayed on the second display unit, feature point extraction is performed, A feature extraction unit for determining a feature point as a measurement point, a correlation processing unit obtained by a correlation process for searching a corresponding point of another image corresponding to the measurement point of the one image, and the first and second displays. The stereo image measuring apparatus is characterized in that the section is configured to mark the measurement point of the cursor section and its corresponding point based on the correlation processing result. 3. A connection means is provided for connecting the measurement point of the previous measurement and the measurement point of the present measurement, and connecting the corresponding point obtained by the correlation processing of the previous measurement and the corresponding point of the present measurement. The stereo image measuring device according to claim 1.