Manual

Table Of Contents
DobotVisionStudio User Guide
Issue V4.1.2 (2022-06-08) User Guide Copyright © Yuejiang Technology Co., Ltd.
109
The tool of quadrilateral search is used to find linear edges in the specified quadrilateral areas. After
the function is enabled, the system outputs the start point and end point information of lines, and the
central point information of the quadrilateral.
Running Parameters
Select Edge: It is used to select the edge 0, 1, 2, 3, and set its corresponding parameters
after selecting the edge.
Edge Type:
- Strongest Edge: find edge point set with the largest gradient threshold and
fitted into a line.
- Last Edge/First Edge: find the last edge/the first edge that meets the
demands.
Edge Polarity: it has three modes, including dark to light, light to dark and any.
Edge Threshold: the edge threshold is the gradient threshold, ranging from 0 to 255. Only
edge points whose edge gradient threshold is greater than this value are detected. The larger the
value is, the stronger the anti noise ability is, the less the number of edges is, and even the target
edge points are screened out.
Filter Size: it is used to filter noise. The larger the value is, the stronger the anti noise ability
is, the less the number of edges is, and even the target edge points are screened out.
Calipers Number: the edge points are clamped by multiple calipers to define the number
of calipers.
Projection Width: refer to Find Line.
Reject Number: see Find Circle for details.
Distance to Remove: see Find Circle for details.
Initial Fit: see Find Circle for details.
Fit Mode: see Find Circle for details.