Graphic overlay for measuring dimensions of features using a video inspection device
First Claim
Patent Images
1. A method for measuring a feature, the method comprising the steps of:
- displaying on a monitor a three-dimensional point cloud view of the feature;
determining three-dimensional coordinates of a plurality of points on a surface of an object including the feature using a central processor unit;
placing a first measurement cursor and a second measurement cursor on the point cloud view 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 object and the first edge plane using a central processor unit;
comparing the distance between the plurality of points on the surface of the 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 point cloud view associated with the plurality of points on a surface of the object having a distance to the first edge plane that is below the predetermined distance threshold.
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Abstract
Methods and devices are provided 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.
66 Citations
13 Claims
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1. A method for measuring a feature, the method comprising the steps of:
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displaying on a monitor a three-dimensional point cloud view of the feature; determining three-dimensional coordinates of a plurality of points on a surface of an object including the feature using a central processor unit; placing a first measurement cursor and a second measurement cursor on the point cloud view 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 object and the first edge plane using a central processor unit; comparing the distance between the plurality of points on the surface of the 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 point cloud view associated with the plurality of points on a surface of the object having a distance to the first edge plane that is below the predetermined distance threshold. - View Dependent Claims (2, 3, 4)
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5. A method for measuring a feature, the method comprising the steps of:
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displaying on a monitor an image of a three-dimensional point cloud view of the feature; determining three-dimensional coordinates of a plurality of points on a surface of an object including the feature using a central processor unit; placing a first measurement cursor, a second measurement cursor, and a third measurement cursor on the point cloud view 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 the surface of the object and the first edge plane using a central processor unit; comparing the distance between the plurality of points on a surface of the 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 point cloud view associated with the plurality of points on the surface of the object having a distance to the first edge plane that is below the predetermined distance threshold. - View Dependent Claims (6, 7, 8)
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9. A method for measuring a feature, the method comprising the steps of:
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displaying on a monitor a three-dimensional point cloud view of the feature; determining three-dimensional coordinates of a plurality of points on a surface of an object including the feature using a central processor unit; selecting one or more reference surface points from the plurality of points on the surface of the 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 point cloud view 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 the surface of the object and the depth plane using the central processor unit; comparing the distance between the plurality of points on the surface of the 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 point cloud view associated with the plurality of points on the surface of the object having a distance to the depth plane that is below the predetermined distance threshold. - View Dependent Claims (10, 11, 12, 13)
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Specification