Manual

DobotVisionStudio User Guide
Issue V4.1.2 (2022-06-08) User Guide Copyright © Yuejiang Technology Co., Ltd.
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• Score: match score.
High-Precision Match
1. Feature Template
The feature template of high-precision match is similar to that of fast match. Create the feature
template in accordance with the specific methods of fast match above, and the specific parameters
are listed as below.
Template Match
• Match Point: it is used to create location standard. Click Select Model Match Center,
and set match point by yourself.
• Scale Mode: when its auto mode can meet demands, it will not adjust. if not, it will switch
to manual mode.
• Roughness scale: the higher the roughness scale parameter, the greater feature scale, and
its respective edge points will be sparse. But, in this way, it can speed up feature matching speed,
and the range is 1 to 20 by default.
• Threshold Mode: when its auto mode can meet demands, it will not adjust. if not, it will
switch to manual mode.
• Contrast Threshold: it means the contrast value. It is related with feature points and gray
value of background. The larger the value, more feature points will be eliminated, and the range is
1 to 255 by default.
2. Running Parameters
You can set parameters of high-precision feature match in order to set search space. Only the targets
in specific search space can be searched, as shown below.
(1) Basic Parameters
• All Search Mode: all the templates are matched after enabling and output the optimal
results.
• Min. Match Score: the match score means the similarity between feature template and
target in searched images. It is also called as similarity threshold. Only when the target's similarity
reaches similarity threshold, it can be searched out. The max. value is 1 which means totally matched,
and it is 0.5 by default.
• Max. Match Number: it is the max. target quantity can be searched. It is 1 by default and
the range is 1 to 200.
• Match Polarity: polarity means the color transition from feature image to background.
When the edge polarity of the searched target does not match with feature template polarity, but you
want to make sure the target is searched, then you need to set match polarity as ignored. if not, you
can set as considered, and search time can be reduced.
• Angle Range: it means the angle changing range when comparing the target and created
template. If you want to search the proactive target, and then you need to set respectively, and the
default range is -180° to 180°.