Stereoscopic measurement system and method

• US 8,345,953 B2
• Filed: 05/22/2008
• Issued: 01/01/2013
• Est. Priority Date: 05/22/2008
• Status: Active Grant

• Current Assignee: Matrix Electronic Measuring Properties, LLC
• Original Assignee: Matrix Electronic Measuring Properties, LLC
• Inventors: Stevens, George B., Clendening, Grady A., Waters, Windflower, Weintraub, Steven, Redden, Warren, Redden, Carl, Srack, Robert W., Srack, Janet M.
• Primary Examiner(s): TUCKER, WESLEY J
• Application Number:
  US12/125,794
• Publication Number:
  US 20090290786A1
• Time in Patent Office: 1,685 Days
• Field of Search: 382/154
• US Class Current: 382/154
• CPC Class Codes: G01B 11/03 by measuring coordinates of points
• CPC Class Codes: G06T 2200/24 involving graphical user interfaces [GUIs]
• CPC Class Codes: G06T 2207/10012 Stereo images
• CPC Class Codes: G06T 2207/20101 Interactive definition of point of interest, landmark or seed
• CPC Class Codes: G06T 7/593 from stereo images

Abstract

A stereoscopic measurement system captures stereo images and determines measurement information for user-designated points within stereo images. The system comprises an image capture device for capturing stereo images of an object. A processing system communicates with the capture device to receive stereo images. The processing system displays the stereo images and allows a user to select one or more points within the stereo image. The processing system processes the designated points within the stereo images to determine measurement information for the designated points.

Claims

1. A system for obtaining measurements of an object, the system comprising:

a portable image capture device to capture first and second images of a plurality of objects and to transmit the first and second images; and

a processing system comprising a measurement application executable on the processing system, the measurement application comprising;

a pairing module to store a stereo image pair in a memory for each of the plurality of objects, the stereo image pair comprising first and second images of a particular object that were simultaneously captured;

a user interface (UI) module to generate a list of stereo image pairs for display, to generate corresponding first and second images of a selected one of the list of stereo image pairs for display, and to receive;

a first user input designating a first set of points in a first stereo image pair and a second user input designating a second set of points in a second stereo image pair, wherein the first stereo image pair comprises the first image and the second image of a portion of the particular object, and wherein the second stereo image pair comprises another first image and another second image of an opposite portion of the particular object; and

a symmetry module configured to;

define a central reference plane between the first set of points in the first stereo image pair and the second set of points in the second stereo image pair; and

calculate symmetry deviations between the first set of points and the second set of points as a function of the defined central reference plane.

2. The system of claim 1 wherein the portable image capture device comprises a first camera to capture each of the first images and a second camera to capture each of the second images, and wherein the pairing module is further configured to store download history data for each stereo image pair in the memory, the download history data comprising metadata and intrinsic calibration data for each of the first and second cameras and a time and date that the corresponding first and second images comprised in each stereo image pair were received from the portable image capture device.

3. The system of claim 2 wherein the portable image capture device further comprises:

a monitor to display the first and the second images of each of the plurality of objects being captured; and

a switch to control the first and second cameras to capture the first and second images of each object simultaneously.

4. The system of claim 2 wherein the measurement application further comprises:

an image-processing module to process each stereo image pair stored in the memory to determine if the first and second images of the particular object are images of a calibration pattern; and

a stereo calibration module to determine stereo calibration data for the portable image capture device when the first and second images of the particular object are of the calibration pattern, the stereo calibration data comprising location information for the first camera relative to the second camera in a coordinate system of the portable image capture device, and wherein the stereo calibration module is configured to store the stereo calibration data in the memory.

5. The system of claim 4 wherein the image-processing module is further configured to associate the stereo calibration data with a particular stereo image pair based on the download history data for the particular stereo image pair when the corresponding first and second images of the particular stereo image pair are not of the calibration pattern.

6. The system of claim 1 wherein the portable image capture device transmits the first and second images via a communication link selected from a group consisting of a wired connection and a wireless communication link.

7. The system of claim 1 wherein:

the UI module is further configured to receive;

a third user input designating a first measurement point in the corresponding first image;

a fourth user input designating a second measurement point in the corresponding first image;

a fifth user input designating the first measurement point along a selection assist line in the corresponding second image; and

a sixth user input designating the second measurement point along another selection assist line in the corresponding second image; and

the measurement application further comprises;

a point selection module to identify a range of points in the corresponding second image based on the first measurement point designated in the corresponding first image, to generate the selection assist line in the corresponding second image based on the range of points, to identify another range of points in the corresponding second image based on the second measurement point designated in the corresponding first image, and to generate the other selection assist line in the corresponding second image based on the other range of points;

a stereo point module to define a first stereo point based on the first measurement point designated in the corresponding first and second images and to define a second stereo point based on the second measurement point designated in the corresponding first and second images;

a cross measure module to calculate a distance between the first stereo point and the second stereo point; and

a reporting module to create a customized report comprising at least one of the calculated distance between the first stereo point and the second stereo point and the calculated symmetry deviations.

8. The system of claim 7 further comprising a measurement database to store reference stereo point data corresponding to at least one reference stereo point on each of the plurality of objects, wherein the reporting module is further configured to create the customized report comprising calculated distances selected from a group consisting of a first distance between the first stereo and the second stereo point, a second distance between the first stereo point and the reference stereo point, and a third distance between the second stereo point and the reference stereo point.

9. A system for obtaining measurements of an object, the system comprising:

a hand-held image capture device to capture a stereo image of each of a plurality of objects, each stereo image comprising first and second images of a particular one of the plurality of objects, the hand-held image capture device comprising;

a first camera to capture the first image of the object;

a second camera to capture the second image of the object;

a communication port to transmit the first and second images; and

a processing system comprising a measurement application executable on the processing system, the measurement application comprising;

a user interface (UI) module to generate corresponding first and second images of a selected stereo image for display and to receive;

a first user input designating a first set of points in a first pair of images and a second user input designating a second set of points in a second pair of images, wherein the first pair of images comprises the first and second images of a portion of the object, and wherein the second pair of image comprises other first and second images of an opposite portion of the object; and

a symmetry module configured to;

define a central reference plane between the first set of points in the first pair of images and the second set of points in the second pair of images; and

calculate symmetry deviations between the first set of points and the second set of points as a function of the defined central reference plane, wherein the user interface (UI) module is further configured to generate the symmetry deviations for display.

10. The system of claim 9 wherein the hand-held capture device further comprises:

a monitor to display the first and second images of each of the plurality of objects; and

a switch to control the first camera and second cameras to capture the first and second images of each object simultaneously.

11. The system of claim 9 wherein the hand-held capture device transmits the first and second images via a communication link selected from a group consisting of a wired connection and a wireless communication link.

12. The system of claim 9 wherein the UI module further receives:

a third user input designating a first measurement point in the corresponding first image;

a fourth user input designating a second measurement point in the corresponding first image;

a fifth user input designating the first measurement point in the corresponding second image along a selection assist line; and

a sixth user input designating the second measurement point in the corresponding second image along another selection assist line; and

the measurement application further comprises;

a point selection module to identify a range of points in the corresponding second image based on the first measurement point designated in the corresponding first image, to generate the selection assist line in the corresponding second image based on the range of points, to identify another range of points in the corresponding second image based on the second measurement point designated in the corresponding first image, and to generate the other selection assist line in the corresponding second image based on the other range of points;

a stereo point module to define a first stereo point that corresponds to the first measurement point designated in the corresponding first and second images and to define a second stereo point that corresponds to the second measurement point designated in the corresponding first and second images;

a cross measure module to calculate a distance between the first stereo point and the second stereo point; and

a reporting module to create a customized report comprising the calculated distance between the first stereo point and the second stereo point and the calculated symmetry deviations.

13. The system of claim 12 further comprising a measurement database to store reference stereo point data corresponding to at least one reference stereo point on each of the plurality of objects, wherein the reporting module is further configured to create the customized report comprising calculated distances selected from a group consisting of a first distance between the first stereo and the second stereo point, a second distance between the first stereo point and the reference stereo point, and a third distance between the second stereo point and the reference stereo point.

14. The system of claim 9 wherein the measurement application further comprises:

an image-processing module to process the first and second images to determine if the first and second images are images of a calibration pattern; and

a stereo calibration module to determine stereo calibration data for the hand-held image capture device when the first and second images are of the calibration pattern, the stereo calibration data comprising location information for the first camera relative to the second camera in a coordinate system of the hand-held image capture device, and wherein the stereo calibration module is configured to store the stereo calibration data in a memory.

15. A method for obtaining measurements of an object comprising:

capturing first and second images of a plurality of objects at an image capture device;

transmitting the first and second images from the image capture device to a processing system;

storing first and second images of a particular object that were captured simultaneously as a stereo image pair in a memory of the processing system;

generating a list of stereo image pairs stored in the memory for display;

displaying corresponding first and second images of a selected one of the list of stereo image pairs;

receiving a first user input designating a first set of points in the stereo image pair and receiving a second user input designating a second set of points in a second stereo image pair, wherein the stereo image pair comprises the corresponding first and second images of a portion of the particular object, and wherein the second stereo image pair comprises second corresponding first and second images of an opposite portion of the particular object;

defining a central reference plane between the first set of points in the stereo image pair and the second set of points in the second stereo image pair;

calculating symmetry deviations between the first set of points and the second set of points as a function of the defined central reference plane; and

displaying the symmetry deviations.

16. The method of claim 15 wherein the first and second images are transmitted from the image capture device via a communication link selected from a group consisting of a wired connection and a wireless communication link.

17. The method of claim 15 further comprising:

receiving a third user input designating a first measurement point in the corresponding first image and receiving a fourth user input designating a second measurement point in the corresponding first image;

identifying a range of points in the corresponding second image based on the first measurement point designated in the first image and identifying another range of points in the corresponding second image based on the second measurement point designated in the first image;

generating a first selection assist line in the corresponding second image based on the range of points and generating a second selection assist line in the corresponding second image based on the other range of points;

receiving a fifth user input designating the first measurement point in the second image along the first selection assist line and receiving a sixth user input designating the second measurement point in the second image along the second selection assist line;

defining a first stereo point based on the first measurement point and a second stereo point based on the second measurement point;

calculating a distance between the first stereo point and the second stereo point; and

creating a customized report comprising the calculated distance between the first stereo point and the second stereo point.

18. The method of claim 17 further comprising storing reference stereo point data corresponding to at least one reference stereo point on each of the plurality of objects, and wherein the customized report comprises calculated distances selected from a group consisting of a first distance between the first stereo and the second stereo point, a second distance between the first stereo point and the reference stereo point, and a third distance between the second stereo point and the reference stereo point.

19. A method for obtaining measurements from stereo images of an object, the stereo image comprising first and second images, the method comprising:

capturing the stereo image at a hand-held image capture device, the hand-held image capture device comprising a first camera, a second camera, and a communication port;

capturing the first image of the object at the first camera;

capturing the second image of the object at the second camera;

transmitting the first and second images from the communication port;

receiving a first user input designating a first set of points in a first pair of images and receiving a second user input designating a second set of points in a second pair of images, wherein the first pair of images comprises the first and second images of a portion of the object, and wherein the second pair of image comprises other first and second images of an opposite portion of the object;

defining a central reference plane between the first set of points in the first pair of images and the second set of points in the second pair of images;

calculating symmetry deviations between the first set of points and the second set of points as a function of the defined central reference plane; and

displaying the symmetry deviations.

20. The method of claim 19 further comprising:

receiving the first and second images at a processing system and, in response thereto, generating the first image and the second image for display;

receiving a third user input designating a first measurement point in the first image and receiving a fourth user input designating a second measurement point in the first image;

identifying a range of points in the second image based on the first measurement point designated in the first image and identifying another range of points in the second image based on the second measurement point designated in the first image;

generating a selection assist line in the second image based on the range of points and generating another selection assist line in the second image based on the other range of points;

receiving a fifth user input designating the first measurement point in the second image along the selection assist line and receiving a sixth user input designating the second measurement point in the second image along the other selection assist line;

defining a first stereo point that corresponds to the first measurement point and defining a second stereo point that corresponds to the second measurement point; and

creating a customized report for display comprising the calculated distance between the first stereo point and the second stereo point.

21. The method of claim 20 further comprising storing reference stereo point data corresponding to at least one reference stereo point on each of the plurality of objects, and wherein the customized report further comprises calculated distances selected from a group consisting of a first distance between the first stereo and the second stereo point, a second distance between the first stereo point and the reference stereo point, and a third distance between the second stereo point and the reference stereo point.