| 摘要 |
<p>PURPOSE: A position measurement apparatus and a position measuring method are provided to measure the length of a measurement target object even when the measurement range of the measurement target object is narrow or wide. CONSTITUTION: A position measurement apparatus is provided to a photographing device(50), an extraction unit(74) and a detector(76) and a measurement unit(78). The photographing device has a photographing region which has a size smaller than a measurement target object(26), and the extraction unit extracts the shape of a surface(32) of the measurement target object from the image within the photographing region. The detector detects the variation of the extracted shape, and the position of the measurement target object on the surface is measured based on the variation detected by the detector.</p> |
