Filter #
You can set what to do with pre-processing of captured video. This is effective when the following monitoring methods are used.
- Template matching
- AKAZE
Grayscale #
Make the video grayscale. Grayscale can be expected to improve processing speed and reduce CPU load.
If you use a monitoring method that directly uses RGB values, don’t use it because it won’t be possible to monitor accurately.
Canny/Binarization #
Edge/Binarize video.
Thia process can reduce the possibility of misrecognition.
Thr.1 / Thr.2 #
The minimum and maximum hysteresis threshold values. This parameter is used to determine whether the edge obtained by the preprocessing in Canny is a real edge. The larger the value, the more severe the edge judgment and the number of detail edges is reduced.
L2 #
L1
is high speed.
L2
is high precision.
In details, please see Canny - OpenCV documentation
Blocksize #
The size of the neighborhood area used for threshold calculation when performing “Adaptive threshold” processing. Specify an odd number greater than 1.
Parameter #
A constant subtracted from the calculated threshold.