Graphic overlay for measuring dimensions of features using a video inspection device

• US 10,019,812 B2
• Filed: 07/12/2017
• Issued: 07/10/2018
• Est. Priority Date: 03/04/2011
• Status: Active Grant

• Current Assignee: Baker Hughes, a GE Company, LLC (Baker Hughes Company)
• Original Assignee: General Electric Company
• Inventors: Bendall, Clark Alexander
• Primary Examiner(s): Hollington, Jermele M
• Assistant Examiner(s): Nasir, Taqi
• Application Number:
  US15/648,010
• Publication Number:
  US 20170337705A1
• Time in Patent Office: 363 Days
• Field of Search: 32475002, 32475013, 32475017, 32475023, 32475419, 324237, 324238, 324239, 324240, 324456, 324718, 382108, 382103, 382199, 382141, 382119, 382154, 382106
• CPC Class Codes: G01B 11/03 by measuring coordinates of points
• CPC Class Codes: G01B 11/24 for measuring contours or curvatures
• CPC Class Codes: G01N 2021/8893 providing a video image and a processed signal for helping visual decision
• CPC Class Codes: G01N 21/88 Investigating the presence of flaws or contamination
• CPC Class Codes: G06F 3/04845 for image manipulation, e.g. dragging, rotation, expansion or change of colour
• CPC Class Codes: G06T 19/00 Manipulating 3D models or images for computer graphics
• CPC Class Codes: G06T 2200/04 involving 3D image data
• CPC Class Codes: G06T 2200/24 involving graphical user interfaces [GUIs]
• CPC Class Codes: G06T 2207/10028 Range image; Depth image; 3D point clouds
• CPC Class Codes: G06T 2207/10068 Endoscopic image
• CPC Class Codes: G06T 2207/20101 Interactive definition of point of interest, landmark or seed
• CPC Class Codes: G06T 2207/30136 Metal
• CPC Class Codes: G06T 2207/30164 Workpiece; Machine component
• CPC Class Codes: G06T 2210/41 Medical
• CPC Class Codes: G06T 2219/012 Dimensioning, tolerancing
• CPC Class Codes: G06T 2219/028 Multiple view windows (top-side-front-sagittal-orthogonal)
• CPC Class Codes: G06T 7/0004 Industrial image inspection
• CPC Class Codes: G06T 7/62 of area, perimeter, diameter or volume

Abstract

A method and device for providing a graphic overlay for measuring dimensions of features using a video inspection device. One or more measurement cursors are placed on pixels of an image of the object. One or more planes are determined parallel or normal to a reference surface or line and passing through surface points associated with the measurement cursors. A semi-transparent graphic overlay is placed on pixels with associated surface points having three-dimensional surface coordinates less than a predetermined distance from the plane(s) to help the user place the measurement cursors.

Claims

1. A method for measuring a feature, the method comprising the steps of:

displaying on a monitor an image of a viewed object;

determining three-dimensional coordinates of a plurality of points on a surface of the viewed object using a central processor unit;

placing one or more measurement cursors on the image using a pointing device;

determining a measurement point corresponding to the location of at least one measurement cursor using the central processor unit;

determining an edge plane using the central processor unit, wherein the edge plane passes through the measurement point;

determining a distance between the plurality of points on a surface of the viewed object and the edge plane using a central processor unit;

comparing the distance between the plurality of points on a surface of the viewed object and the edge plane to a predetermined distance threshold using the central processor unit; and

displaying an edge plane graphical overlay on pixels in the image associated with the plurality of points on a surface of the viewed object having a distance to the edge plane that is below the predetermined distance threshold.

2. A method for measuring a feature, the method comprising the steps of:

displaying on a monitor an image of a viewed object;

determining three-dimensional coordinates of a plurality of points on a surface of the viewed object using a central processor unit;

placing a first measurement cursor and a second measurement cursor on the image using a pointing device;

determining a first measurement point corresponding to the location of the first measurement cursor using the central processor unit;

determining a second measurement point corresponding to the location of the second measurement cursor using the central processor unit;

determining a three-dimensional line between the first measurement point and the second measurement point using the central processor unit;

determining a first edge plane using the central processor unit, wherein the first edge plane is normal to the three-dimensional line and passes through the first measurement point;

determining a distance between the plurality of points on a surface of the viewed object and the first edge plane using a central processor unit;

comparing the distance between the plurality of points on a surface of the viewed object and the first edge plane to a predetermined distance threshold using the central processor unit; and

displaying a first edge plane graphical overlay on pixels in the image associated with the plurality of points on a surface of the viewed object having a distance to the first edge plane that is below the predetermined distance threshold.

3. The method of claim 2, further comprising the steps of:

determining a second edge plane using the central processor unit, wherein the second edge plane is normal to the three-dimensional line and passes through the second measurement point;

determining a distance between the plurality of points on a surface of the viewed object and the second edge plane using a central processor unit;

comparing the distance between the plurality of points on a surface of the viewed object and the second edge plane to a predetermined distance threshold using the central processor unit; and

displaying a second edge plane graphical overlay on pixels in the image associated with the plurality of points on a surface of the viewed object having a distance to the second edge plane that is below the predetermined distance threshold.

4. The method of claim 2, wherein the image of the viewed object is a two-dimensional image.

5. The method of claim 2, wherein the image of the viewed object is a three-dimensional view of the plurality of points on the surface of the viewed object.

6. The method of claim 2, wherein the first measurement point is a point on the surface of the viewed object corresponding to the location of the first measurement cursor.

7. The method of claim 2, wherein the distance between the plurality of points on a surface of the viewed object and the first edge plane is a perpendicular distance.

8. A method for measuring a feature, the method comprising the steps of:

displaying on a monitor an image of a viewed object;

determining three-dimensional coordinates of a plurality of points on a surface of the viewed object using a central processor unit;

placing a first measurement cursor, a second measurement cursor, and a third measurement cursor on the image using a pointing device;

determining a first measurement point corresponding to the location of the first measurement cursor using the central processor unit;

determining a second measurement point corresponding to the location of the second measurement cursor using the central processor unit;

determining a third measurement point corresponding to the location of the third measurement cursor using the central processor unit;

determining a three-dimensional reference line between the first measurement point and the second measurement point using the central processor unit;

determining a three-dimensional length line between the third measurement point and the three-dimensional reference line using the central processor unit;

determining a first edge plane using the central processor unit, wherein the first edge plane is normal to the three-dimensional length line and passes through the first measurement point and the second measurement point;

determining a distance between the plurality of points on a surface of the viewed object and the first edge plane using a central processor unit;

comparing the distance between the plurality of points on a surface of the viewed object and the first edge plane to a predetermined distance threshold using the central processor unit; and

displaying a first edge plane graphical overlay on pixels in the image associated with the plurality of points on a surface of the viewed object having a distance to the first edge plane that is below the predetermined distance threshold.

9. The method of claim 8, further comprising the steps of:

determining a second edge plane using the central processor unit, wherein the second edge plane is normal to the three-dimensional length line and passes through the third measurement point;

determining a distance between the plurality of points on a surface of the viewed object and the second edge plane using a central processor unit;

comparing the distance between the plurality of points on a surface of the viewed object and the second edge plane to a predetermined distance threshold using the central processor unit; and

displaying a second edge plane graphical overlay on pixels in the image associated with the plurality of points on a surface of the viewed object having a distance to the second edge plane that is below the predetermined distance threshold.

10. The method of claim 8, wherein the image of the viewed object is a two-dimensional image.

11. The method of claim 8, wherein the image of the viewed object is a three-dimensional view of the plurality of points on the surface of the viewed object.

12. The method of claim 8, further comprising the steps of:

selecting one or more reference surface points from the plurality of points on the surface of the viewed object using a pointing device; and

determining a reference surface using the central processor unit, wherein the reference surface is determined based on the one or more of the reference surface points;

wherein the first measurement point is a point on the reference surface corresponding to the location of the first measurement cursor.

13. The method of claim 8, wherein the distance between the plurality of points on a surface of the viewed object and the first edge plane is a perpendicular distance.

14. A method for measuring a feature, the method comprising the steps of:

displaying on a monitor an image of a viewed object;

determining three-dimensional coordinates of a plurality of points on a surface of the viewed object using a central processor unit;

selecting one or more reference surface points from the plurality of points on the surface of the viewed object using a pointing device;

determining a reference surface using the central processor unit, wherein the reference surface is determined based on the one or more of the reference surface points;

placing a measurement cursor on the image using the pointing device;

determining a measurement point corresponding to the location of the measurement cursor using the central processor unit;

determining a depth plane using the central processor unit, wherein the depth plane is parallel to the reference surface and passes through the measurement point;

determining a distance between the plurality of points on a surface of the viewed object and the depth plane using the central processor unit;

comparing the distance between the plurality of points on a surface of the viewed object and the depth plane to a predetermined distance threshold using the central processor unit; and

displaying a depth plane graphical overlay on pixels in the image associated with the plurality of points on a surface of the viewed object having a distance to the depth plane that is below the predetermined distance threshold.

15. The method of claim 14, further comprising the step of displaying a depth color gradient overlay on pixels in the image associated with the plurality of points on a surface of the viewed object that are deeper than the depth plane, wherein a color of the pixel for a point on the surface is based on the distance between the point on the surface of the viewed object and the depth plane.

16. The method of claim 14, further comprising the steps of:

determining a distance between the plurality of points on a surface of the viewed object and the reference surface using a central processor unit;

comparing the distance between the plurality of points on a surface of the viewed object and the reference surface to a predetermined reference surface distance threshold using the central processor unit; and

displaying a reference surface graphical overlay on pixels in the image associated with the plurality of points on a surface of the viewed object having a distance to the reference surface that is below the predetermined reference surface distance threshold.

17. The method of claim 14, wherein the image of the viewed object is a two-dimensional image.

18. The method of claim 14, wherein the image of the viewed object is a three-dimensional view of the plurality of points on the surface of the viewed object.

19. The method of claim 14, wherein the measurement point is a point on the surface of the viewed object corresponding to the location of the measurement cursor.

20. The method of claim 14, wherein the distance between the plurality of points on a surface of the viewed object and the depth plane is a perpendicular distance.