Method and device for automatically identifying a point of interest on the surface of an anomaly

摘要

A method and device for automatically identifying a point of interest (e.g., the deepest or highest point) on the surface of an anomaly on a viewed object using a video inspection device is disclosed. The video inspection device obtains and displays an image of the surface of the viewed object. A reference surface is determined along with a region of interest that includes a plurality of points on the surface of the anomaly. The video inspection device determines a depth or height for each of the plurality of points on the surface of the anomaly in the region of interest. The point on the surface of the anomaly (e.g., having the greatest depth or height) is identified as the point of interest. A profile of the object surface at the point of interest is then determined.

主权项

1. A method of automatically identifying a point of interest on a surface of an anomaly on an object surface of a viewed object, the method comprising the steps of:
displaying on a monitor an image of the object surface; determining the three-dimensional coordinates of a plurality of points on the object surface using a central processor unit; selecting a first reference line endpoint on a first pixel of the image using a pointing device; selecting a second reference line endpoint on a second pixel of the image using the pointing device; determining the three-dimensional coordinates of a plurality of points on a first reference line extending between the first reference line endpoint and the second reference line endpoint using the central processor unit; selecting a third reference line endpoint on a third pixel of the image using the pointing device; selecting a fourth reference line endpoint on a fourth pixel of the image using the pointing device; determining the three-dimensional coordinates of a plurality of points on a second reference line extending between the third reference line endpoint and the fourth reference line endpoint using the central processor unit; determining a reference surface based on the three-dimensional coordinates of at least two of the plurality of points on the first reference line and at least one of the plurality of points on the second reference line using the central processor unit; determining a region of interest for the reference surface that comprises a plurality of points on the surface of the anomaly using the central processor unit; determining the distances between the reference surface and the plurality of points on the surface of the anomaly in the region of interest using the central processor unit; determining the three-dimensional coordinates of the point of interest on the surface of the anomaly in the region of interest having the greatest distance from the reference surface using the central processor unit; determining the three-dimensional coordinates of a plurality of points of a profile surface contour line on the object surface between the first reference line and the second reference line including the point of interest on the surface of the anomaly using the central processor unit; and determining a profile of the object surface by determining the distance from the reference surface to the plurality of points of the profile surface contour line on the object surface using the central processor unit.