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 75, and the minimum threshold to be input is 1. The smaller the value is and the more an obscure barcode is detected, but it could take more time for the image processing.