3.4. Wear area
Images of the cutting tips before and after machining were captured as shown in Fig. 7. These two images were aligned automatically before subtraction. The software subsequently produces
images shown in Fig. 5(a) and (b) depending on the final condition of the inserts. Moreover, the software is able to exactly calculate the area differences between the two images, indicated by
the black-colored area in Fig. 5(c–d). A larger black area indicates that