Umbral contraste
Especifique el umbral para el contraste (diferencia entre claro y oscuro) necesario en la imagen para identificar algo como borde. Introduzca el valor o cámbielo con los botones.

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.