| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for extracting the contour line of a cutting edge of a tool to obtain the contour line of the cutting edge, using multilevel picture data of a cutting edge photographed image for measuring the cutting edge wear degree of a tool. SOLUTION: Three or more line pixel pickup lines K11 -K14 intersecting in the cutting edge direction are extracted according to the cutting edge's orientation on a cutting edge multilevel picture of a tool, line pixel data on each line pixel pickup line are differentiated to obtain boundary candidate points between the tool cutting edge and background, a combination of points which forms a straight line most closely is selected among combinations of boundary candidate points as a guide straight line LG for the cutting edge, a differentiated picture according to the cutting edge on the cutting edge multilevel picture is obtained, and pixels having higher differentiated values are taken out along the guide straight line to obtain the cutting edge contour line of the object. |
