Manual

Table Of Contents

DobotVisionStudio User Guide

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take more time to execute the tool. A higher value can improve the execution speed of the tool, but

the edge of the tool you want to find may not be detected.

It is generally recommended that this value be at least as large as the set filter size.

• Absolute / Relative Edge Threshold: Only edge points whose edge gradient threshold is

greater than the extraction threshold are detected.

• Edge Polarity: Four kinds of edge polarity are available: From White to Black, From Black

to White & From White to Black, From Black to White & From White to Black, and From Black to

White/From White to Black. & indicates that in the same line segment, both polarities of the point

set need to be considered, / indicates that in the same line segment, if the point set has two polarities,

either one can be used for fitting.

• Edge Angle Tolerance: The maximum allowable angle difference between the gradient

direction of the edge point and the direction perpendicular to the fitting line (the normal direction

of the fitting line). By increasing this value, the tool may take more consideration of the edge points,

thereby changing the position of the found line segment.

• Edge Distance Tolerance: It refers to the max. allowable distance between the edge point

and the line. When the edge distance tolerance is increased, it is allowed the tool to consider more

edge points and change the position of the discovery line.

• Max. Line: The maximum target line quantity.

• Coverage Rate: It refers to the min. percentage of actual edge point quantity in planed

edge point quantity. The value is larger, the line with higher coverage rate may be outputted.

NOTE

 High coverage rate does not mean that there are many edge points covered, which

should be comprehensively considered in combination with the actual length of

straight line segment.

• Linear Rotation Tolerance: The amount of rotation of the found line segment and the

tolerance of the defined gradient search direction. A lower value forces the tool to locate segments

that are more parallel to the gradient search direction.

• Fit Mode: The two fitting methods only have some differences in the calculation of weight.

With the increase of the number of outliers and the distance of outliers, Huber and Tukey can be

used step by step.

Blob Label Analysis

BLOB label analysis module adds two output results: category tag and tag value, based on the

function of Blob module. It is usually used together with the module of scientific research outputting

multi category information, such as DL image segmentation.