| 摘要 |
PROBLEM TO BE SOLVED: To obtain a method and an apparatus for measuring an interface accurately regardless of disturbance. SOLUTION: The interface measuring apparatus comprises means 3 for acquiring an original image including an interface to be measured at a preset sampling interval, and means 40 for locating the interface by analyzing the acquired original image. The image analyzing means 40 comprises a section 40b for operating the differential image between current and past original images, a section 40e for obtaining an image by extracting the variation of the original image based on the differential image, and a section 40f for locating the interface based on the extracted image. |
