對比閾值

指定閾值:影像中需要什麼程度的對比(明和暗之間的差異),以便將某物體辨識為邊緣。使用按鍵來輸入值或 變更值。

The default value is 10, and the specifiable range is from 1 to 200.
If the average contrast of the contour of the found region is below this threshold, then the region will not be considered as a flaw. Faint flaws can be detected when a lower threshold value is specified, but some flaws may be recognized larger and the contour fuzzier. On the other hand, faint 'flaws' are not found when a higher threshold value is specified, and only apparent flaws are found. If the contour of a flaw is fuzzier than you expected it would be, increase this value.