| 摘要 |
<p>A lattice is projected several times, onto an object to be measured, from different positions or with different pitches, and images of the projected lattice are captured and analysed to obtain a three-dimensional shape of the object to be measured. Pixels in which a position in three-dimensional space obtained from an image including the object to be measured and background differs by at least a prescribed value from a position in three-dimensional space obtained from a background image which does not include the object to be measured are extracted as pixels belonging to the object to be measured. As a result, the background and the object to be measured can be accurately separated, even if surfaces having high refractive indices are not included in the background.</p> |
