Manual

Table Of Contents
DobotVisionStudio User Guide
Issue V4.1.2 (2022-06-08) User Guide Copyright © Yuejiang Technology Co., Ltd.
105
Edge Pair Type: see Spacing Detection for details.
Edge Polarity: it has three polarities, 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.
Caliper Number: used to scan number of ROI areas of edge points.
Filter Size: it is used to enhance the edge and suppress noise, and its minimum 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 value needs to be set
based on the actual situation.
Projection Width: In the ROI, several edge points are distributed in a circle to search for
the ROI. This parameter describes the width of the area where the edge points are scanned for the
ROI. Increase the value within a certain range to obtain more stable edge points.
Reject Number: It means that the number of minimum points that have high error to be
excluded from fitting. In general, if there is a great number of points excluded from fitting, its value
should be set higher. For better results, it is recommended to use it in combination with the parameter
of distance to remove.
Distance to Remove: It means that the maximum pixel distance from the outlier to the fit
circle. The smaller the value, the more points are excluded.
Initial Fit: see Find Circle for details.
Fit Mode: It has three types, including least squares, huber and tukey. The three fitting
methods only have some differences in the calculation of weight. With the increase of the number
of outliers and the distance of outliers, the least squares, Huber and Tukey can be used step by step.
Peak Search
The tool of peak search is used to detect the peak of an object in specific area, as shown below.
Detection Parameter