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。

Set a value between 1 and 200. The default value is 50. If you set a small value, the tool will be able to find the target in obscure images as well but take longer to complete the location process. If the tool is prone to inadequately find blemishes and other unwanted edges with low contrast, try setting a larger value. Those image features whose contrast is lower than the threshold are ignored. Selecting the [Image + Edges] in [Image Display Mode] lets you check the image features extracted based on the current threshold.