| 摘要 |
<p>A hardness tester (100) includes an image capture control means (61) for obtaining an image data of the surface of the sample by controlling and making an image capture means (12) capture an image of the surface; an impression region extracting means (61) that binarizes the image data, applies reduction/expansion processing to the binarized image data, applies a distance conversion processing to the reduction/expansion processed image data, and extracts a closed region corresponding to a contour of the indenter by using the distance-converted image data; an impression vertex extracting means (61) that estimates the vertex for measuring the impression based on a profile of the closed region and extracts a point in the binarized image data, as the vertex for measuring the impression, that agrees with a predetermined condition; and a hardness calculating means (61) for calculating hardness of the sample based on the vertexes for measuring the impression.</p> |
