Manual

Table Of Contents

DobotVisionStudio User Guide

223

Linear Edge Defect Detection

The tool of linear edge defect detection is used to detect defects and bumps on the linear edge. It

outputs the position information of the defect bounding box and defect size. The specific operation

method is shown below. It is recommended to enable Standard Input when the linear edge is blurry.

⚫ Input Mode: You can select Line, By Point, or By Coordinate. When selecting Line as

Input Mode, you need to link line. When selecting By Point as Input Mode, you need to

enter Start point, Endpoint, and Angle. When selecting By Coordinate as Input Mode,

you need to enter Start point X Coordinate, Start point Y Coordinate, Endpoint X

Coordinate, and Endpoint Y Coordinate.

⚫ 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.