Manual

Table Of Contents

DobotVisionStudio User Guide

222

• Input Mode: You can select By Circle or By Parameter. When selecting By Circle as

Input Mode, you need to link Circle, Angle Start, and Angle Range. When selecting By

Parameter as Input Mode, you need to enter Circle Center X, Circle Center Y, Radius,

Angle Start and Angle Range.

• ROI Area: You can select Draw or Inherit.

• Edge Type: It includes Strongest Edge, First Edge and Last Edge.

• Edge Polarity: It includes Dark to Light, Light to Dark and Both.

• Filter Kernel Size: It is used to enhance the edge and suppress noise, and its min. value is

1. When the edge is blurred or there is noise interference, you can increase its value to make

the detection result more stable. If the distance between the edge and the edge is smaller

than the filter size, it will affect the accuracy of the edge location or even lose edge. This

parameter value needs to be set based on the actual situation.

• Contrast Threshold: It is also called gradient threshold, and its range is from 0 to 255. The

edge point whose gradient threshold is larger than this value can be detected. The larger the

value, the stronger noise resistibility, the smaller the number of edges obtained, and even

the target edge points are filtered out.

• Caliper Height: It refers to the height of caliper.

• Caliper Length: It refers to the length of caliper.

• Caliper Spacing: It refers to the spacing of caliper.

• Defect Polarity: It includes Trajectory Left Defect, Trajectory Right Defect, and

Trajectory Both Defect.

• Rough Min Distance: The distance between the edge point and the fitted straight line. If

the distance is greater than the threshold, it is determined as the defect point to be filtered.

If the Defect Size Enable or Defect Area Enable is enabled, you need to further filter

according to the corresponding threshold.

• Defect Size Enable: If enabled, you need to enter Rough Min Size.

• Defect Area Enable: If enabled, you need to enter Rough Min Area.