JP3316682B2 - Stereo image measurement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention displays a stereo image,
The present invention relates to a stereo image measurement device that performs a correlation process on the display screen, and particularly to a stereo image measurement device that can perform a correlation process after extracting a feature point near a cursor position.

[0002]

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

When analyzing this stereo image, it is necessary to search for one of the left and right positions and the other corresponding point corresponding to this position. Correlation methods were used.
In any of these search methods, only a part of the stereo image is displayed in a stereoscopic manner.

[0004]

However, the conventional method of displaying an image of a local part of a stereo image is characterized in that the measurement point is manually operated by a measurer, so that there is a characteristic suitable for correlation. It was done.

[0005] For this reason, even when the correlation processing for obtaining the corresponding points is performed, there are cases where the corresponding points cannot be obtained reliably.
There has been a strong demand for the appearance of a stereo image measuring device capable of reliably searching for a corresponding point.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a stereo image storage section for storing at least a pair of stereo images, and a stereo image stored in the stereo image storage section. And a cursor moving unit for moving a cursor in a stereo image displayed on the display unit, and a vicinity of a cursor position in one of the stereo images displayed on the display unit. A feature extraction unit for extracting a feature point and determining the feature point as a measurement point; and a correlation processing unit for searching for a corresponding point of another image corresponding to the measurement point of the one image. The display unit is configured to add a mark to the determined corresponding point based on the measurement point and the correlation processing result.

Further, the present invention provides a stereo image storage unit for storing at least a pair of stereo images, a stereo image storage unit having a first display area, and storing the stereo images 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 a 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 in the vicinity of the cursor at a second magnification greater than the second magnification;
In the vicinity of the cursor position in one image of the stereo images displayed on the display unit, perform a feature point extraction, and a feature extraction unit for determining the feature point as a measurement point; A correlation processing unit for performing a correlation process for searching for a corresponding point of another corresponding image; and the first and second display units mark a measurement point of the cursor unit and a corresponding point thereof based on the correlation processing result. It is configured as follows.

Further, the present invention provides a connection means for connecting the measurement point of the previous measurement and the measurement point of the current measurement, and connecting the corresponding point obtained by the correlation processing of the previous measurement and the corresponding point of the current 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 displays Moving the cursor in the stereo image displayed on the display unit, the feature extraction unit performs feature point extraction near the cursor position in one of the stereo images displayed on the display unit, Is determined as a 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 adds a mark to 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 section stores at least a pair of stereo images, and the first display section having the first display area stores the stereo image stored in the stereo image storage section at the first magnification. Is displayed, and the cursor moving unit moves the cursor in the stereo image displayed on the first display unit, and the second display unit having the second display area smaller than the first display area displays the first display area. Second larger than magnification
Displays the stereo image within the range near the cursor at the magnification,
The feature extraction unit performs feature point extraction near the cursor position in one of the stereo images displayed on the second display unit, and determines the feature point as a 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 first and second display units
Based on the result of the correlation processing, a mark is added to the measurement point of the cursor part and the corresponding point.

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

[0012]

【Example】

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

"Stereo Image Measurement Method"

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

Incidentally, there is a method of visualization depending on the stereoscopic ability of the user for the correspondence in the stereoscopic vision.
An automatic search process using image correlation or the like for comparing the similarity between the left and right image densities can also be performed. The automatic search processing using the electronic computer is generally called stereo matching.

Next, the stereo image measuring device 1 will be described with reference to FIG. The stereo image measuring device 1 includes a control device main body 2, an optical disk drive 31 for a left photograph, an optical disk drive 32 for a right photograph, and a 3D monitor 4.

The control device main body 2 is an arithmetic processing device provided with 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 main body 2 will be described later in detail. Optical disk drive 3
Is composed of an optical disk drive 31 for the left photograph and an optical disk drive 32 for the right photograph. The optical disk drive 3 stores a large amount of image data from an external scanner or the like. The left photo optical disk drive 31 corresponds to a memory unit for storing left stereoscopic image data, and the right photo optical disk drive 32 corresponds to a memory unit for storing right stereoscopic image data. Things. In addition, if it is a large-capacity memory, not only an optical disk 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 high-resolution display 41 for the left image, the high-resolution display 42 for the right image, and the half mirror 43 are provided. A polarizing filter 411 is mounted on the front of the high resolution display 41 for the left image, and a polarizing filter 421 is mounted on the front of the high resolution display 42 for the right image. The polarization characteristics of the polarization filter 411 and the polarization filter 421 are configured to be orthogonal to each other, and the user can stereoscopically view the target image by observing with polarized glasses having polarization characteristics orthogonal to each other. Can be.

Next, the electrical configuration of the control device main 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, A line drawing / cursor memory 24a, a main line drawing / cursor memory 24b, a sub line drawing / cursor memory 25a, a sub line drawing / cursor memory 25b, a memory control unit 26a, and a memory control unit 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 synthesizing 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, a buffer memory 21b, a main image memory 22b, a sub image memory 23b, a main line drawing / cursor memory 24b, and a 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 a right image system, and are connected to a right image high-resolution display (right monitor) 42. .

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 a first display unit.
For displaying a 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 4
It has a second display area smaller than 11, and is for displaying a stereo image within a range displayed on the main screen 411 at a second magnification larger than the first magnification.

Similarly, the high-resolution display (right monitor) 42 for the right image 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 the main screen 421, and displays a stereo image in the range displayed on the main screen 421 at a second magnification larger than the first magnification. It is for displaying.

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

The buffer memory 21a corresponds to a memory unit or a stereo image storage unit, and reads out image data to be subjected to stereo image processing from the optical disk drive 31 for the left photograph and temporarily stores the image data. .

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

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

The main line drawing / cursor memory 24a has the same capacity as the main image memory 22a, and is for displaying white pixels only at the line drawing and the cursor position. The sub-line drawing / cursor memory 25a has the same capacity as the sub-image memory 23a, and performs white pixel display only at the line drawing and the cursor existing position.

The memory control unit 26a includes the buffer memory 2
1a and the main image memory 22a and the sub image memory 2 based on the screen magnification of the main screen 411 and the sub screen 412.
3a.

The synthesizing unit 27a synthesizes 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,
This 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, which are the same as those in which the electrical configuration of the left image system is replaced with the right image, and thus the description is omitted.

The feature extracting section 291 is for extracting the features of the image from the image data. In this embodiment, the signal processing is performed on the values of the nine pixels near the designated point by the Laplacian Gaussian filter. A feature extraction method is employed. The Laplacian Gaussian filter corresponds to filtering of a digital image, and is a type of a spatial filter that performs processing in the same space as the image space. The Laplacian Gaussian filter is equivalent to a secondary differentiation operation, and calculates a difference in four directions with a certain point as a center. As a result, it is possible to extract a portion where the density changes rapidly 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 process will be described later.

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

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

Next, at S2, the input section 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
(1/2, 1/3,...) Is selected, but any method that can determine the main screen magnification (LMAG) is adopted. can do. The setting of the main screen magnification (LMAG) is performed by the input unit 29.
3 from the main screen magnification specifying signal (b).
Is transmitted to the memory control unit 26a and the memory control unit 26b via the.

Next, in S3, the processing command section 20 transfers the left image data from the buffer memory 21a to the main image memory 22a at address intervals corresponding to the main screen magnification (LMAG). Similarly, 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
Reference numeral 6b controls the address interval of the right image data read from the buffer memory 21b. And the main screen magnification (LM
AG) becomes smaller, the address interval becomes larger, and a reduced image is formed on the main image memory 22b.

In S4, the input unit 293 sets and inputs the sub-screen magnification (HMAG) of the sub-screen 412 and the sub-screen 422. In this embodiment, the sub-screen magnification (HMAG)
Is configured to select any value of (1, 2, 3,...), But any method can be adopted as long as the method can determine the sub-screen magnification (HMAG). Can be.
The setting of the sub-screen magnification (HMAG) is performed by transmitting a 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 processing instruction unit 20. . Generally, the sub-screen 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, and the cursor is moved. Then, as shown in FIG. 4A, on the main screen 411 and the main screen 421, the main image approximate measurement point LP (I, J) of the left image and the main image approximate measurement point RP (K, J) of the right image. Is specified. That is, the operator moves the left and right cursors so as to position the cursor on the measurement point while viewing the screen of the monitor 4, and designates the measurement point. After designation LP (I, J), RP
A square frame indicating the measurement range of the sub-screens 412 and 422 around the (K, J) is displayed on the main screens 411 and 421. In the present embodiment, five main image approximate measurement points are set, and the main image approximate measurement points LP (I, J) of the left image are:
P1, P2, P3, P4, and P5, and the main image approximate measurement points RP (K, J) of the right image are P1 ', P2',
P3 ', P4', and P5 '. Hereinafter, 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.

In S6, the processing command section 20 transfers the left image data from the buffer memory 21a to the sub-image memory 23a at an address interval corresponding to the sub-screen magnification (HMAG). Similarly, the right image data is transferred from the buffer memory 21b to the sub-image memory 23b. In addition, the memory control unit 26a uses the address interval determination signal (c) to
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 on the left sub-screen 412 is extracted. This feature extraction is performed 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, a correlation process is performed by the correlator 292. Generally, an absolute difference method, a correlation coefficient method, or the like is used for the correlation processing. That is, as shown in FIG. 4C, the reference measurement point LP (Ia, J) on the left sub-screen 412 determined in S8.
The corresponding point RP (Ka, J) of the right sub-screen 422 corresponding to a)
Search for a).

Next, in S10, a left and right image cursor is displayed. That is, the main screen 411 and the sub-screen 41 of the left monitor 41
2 and 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 there is a very similar image having no feature in the left and right images, an error may occur in the correlation processing.

If an error in the corresponding point is found in S11, the process proceeds to S12, in which 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 measured point and the current measured point are written to a and 24b and displayed on the main screens 411 and 421.

In S14, in this embodiment, it is determined whether or not the measurement of P5 has been completed. If the measurement has been completed up to the last measurement of P5, the process proceeds to S15 to end the measurement.
If the measurement has not been completed up to P5, the process proceeds to S16, and it is determined whether or not the cursor has moved. If the cursor has been moved, that is, if it is determined that the measurement is to be continued, the process proceeds to S17.

In S17, it is determined whether the movement of the cursor is equal to or higher than a predetermined speed, or whether the cursor is moving out of the range of the screen of the sub-images 412, 422.
Proceeding to S18, the sub-screens 412, 422 are stopped, and the process returns to S5 to repeat the measurement. Further, in S17, if the movement of the cursor is not higher than the predetermined speed or does not move out of the range of the screen, the process proceeds to S19 to scroll the sub-screens 412, 422. Next, the process proceeds to S20, in which a rough measurement point is 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. However, the number can be changed to an appropriate number according to the contour of the object.

In step S13, not only each corresponding point is simply connected by a line segment, but also the measurement can be performed as a polyline. A polyline is a figure that connects several line segments, 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 of 1 to 6. At the end of the measurement, "close the polyline" (FIG. 5A) is specified or "open the polyline" (FIG. 5A). 5 (b)). Further, when measurement is mistakenly performed, addition or deletion can be performed. Also, if a constant height (Z) is given to control the left and right cursor intervals and the polyline is measured, a contour line can be drawn.

Further, not only the polyline measurement but also the circle measurement and the arc measurement can be used. In the circle measurement, as shown in FIG. 6A, a center point A and a radius B are designated to give a figure data of a circle, or as shown in FIG. , C are designated. The arc measurement was performed as shown in FIG.
By giving an end point C and an intermediate point B on the circumference, graphic data of an arc is given. By utilizing such polyline measurement, circle measurement, arc measurement, or the like, there is an advantage that drawing of the outline of the measurement object can be facilitated and graphic data can be managed by using some point data.

Note that the main screen magnification (LMAG) corresponds to the first magnification, and the sub-screen magnification (HMAG) corresponds to the second magnification. An input unit 293 for setting and changing these magnifications and a processing command unit 20
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, 422, the correlator 292 is used in the main image memory 22.
a, 22b to transfer the data, the main screen 41
It is also possible to adopt a configuration in which the cursor position is determined by using the correlation processing also in the rough measurement point designation on 1, 421.

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

In S1 of FIG. 8, each parameter is
Input from 93. In the present embodiment, the number of correlation data points N
W, search data score ISEAR, correlation comparison ABSMIN
Set. The correlation data point number 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, the right image of the NW vertical and ISEAR rectangular right images Indicates how many data strings are arranged in the horizontal direction. The correlation comparison ABSMIN is:
In order to search for a case where the absolute difference to be calculated is minimum, the value 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 the reference image data. In S2, the number M of search image data of the right image is M
Is calculated. That is, like the reference image data,
Since NW pieces are arranged, the number M of search image data of the right image is NW * ISEAR.

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

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

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

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

Then, in S7, the S transferred and stored in S6
By calculating 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)

Are calculated from i = 1 to N, and their sum is obtained as ABS.

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

Next, proceeding to S11, ICOUNT is set to SE.
It is determined whether it matches the ARCH. That is, ICOUNT is S
When the data matches the EARCH, the SDATA of each block is searched from the search image data RDATA (M) of the right image.
(N) means that all correlation processing has been completed. In this case, the process ends in S12, and MA
The block of the search image data corresponding to the ICOUNT stored in the TPON becomes a block (that is, a corresponding data string) in the search image data of the right image corresponding to the reference image data of the left image.

Then, in S11, ICOUNT is SEARC.
If it does not match H, the process proceeds to S13, where 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 least ABS can be determined.
The block in the search image data of the right image specified in
It is the corresponding point to be sought.

[0073]

The present invention configured as described above provides 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, A cursor moving unit for moving a cursor in the stereo image displayed on the display unit, and near the cursor position in one of the stereo images displayed on the display unit, perform feature point extraction, A feature extraction unit for determining a feature point as a measurement point, a correlation processing unit for determining by a correlation process for searching for a corresponding point of another image corresponding to the measurement point of the one image, and the display unit, Based on the points and the results of the correlation processing, it is configured to mark the corresponding points obtained, so that correlation processing can be performed based on the vicinity of the feature points, and the corresponding points can be found reliably. There is an excellent effect that it can be.

[0074]

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating an electrical configuration of a control device main body 2 according to the present embodiment.

FIG. 3 is a diagram illustrating 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 device of the present embodiment.

FIG. 5 is a diagram illustrating a 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 the correlator 292 according to the present embodiment.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 stereo 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 drawing / cursor memory 25 sub line drawing / cursor memory 26 memory control unit 27 synthesis unit 28 D / A converter 291 Feature extraction unit 292 Correlator 293 Input unit 3 Optical disk drive 31 Optical disk drive for left photo 32 Optical disk drive for right photo 4 3D monitor 41 Left monitor 411 Main screen 412 Sub screen 42 Right monitor 421 Main screen 422 Sub screen

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-209315 (JP, A) JP-A-2-267676 (JP, A) JP-A-62-130303 (JP, A) (58) Investigation Field (Int.Cl. ⁷ , DB name) G01B 11/00-11/30 102 G01C 11/00-11/34 G06T 17/00 H04N 7/18 H04N 13/00-17/06

Claims (3)

(57) [Claims] 1. A stereo image storage unit for storing at least a pair of stereo images, a display unit for displaying a stereo image stored in the stereo image storage unit, and a stereo image displayed on the display unit A cursor moving unit for moving a cursor inside, and extracting a feature point near a cursor position in one of the stereo images displayed on the display unit, and determining the feature point as a measurement point. A feature extraction unit, a correlation processing unit that obtains by a correlation process of searching for a corresponding point of another image corresponding to the measurement point of the one image, and the display unit obtains a result based on the measurement point and the correlation processing result. A stereo image measuring apparatus characterized in that a mark is attached to the corresponding point. 2. A stereo image storage unit for storing at least a pair of stereo images, and having a first display area for displaying a stereo image stored in the stereo image storage unit at a first magnification. And a first display unit of
A cursor moving unit for moving a cursor in a stereo image displayed on the display unit; and a second magnification having a second display area smaller than the first display area and being larger than the first magnification. A second display unit for displaying a stereo image in a range near the cursor, and performing feature point extraction near a cursor position in one of the stereo images displayed on the second display unit. A feature extraction unit for determining a feature point as a measurement point, a correlation processing unit for obtaining a corresponding point of another image corresponding to the measurement point of the one image by a correlation process, and the first and second displays The stereo image measuring device is characterized in that the section is configured to mark the measurement point of the cursor section and the corresponding point based on the correlation processing result. 3. A connection means for connecting the measurement point of the previous measurement and the measurement point of the current measurement, and connecting the corresponding point obtained by the correlation processing of the previous measurement and the corresponding point of the current measurement. The stereo image measuring device according to claim 1.