The Linear Filter module applies a convolution operator on a 1x3 sliding window directly on the data flow as it comes from the camera. The 3 elements of the convolution kernel (A, B, and C) are configurable accepting any positive integers where the sum of the 3 elements is a value between 1 and 512.
This figure illustrates the positioning of the convolution kernel elements within a given LLE-ROI:
Linear Filter kernel disposition
When an element of the kernel is located outside of the LLE-ROI boundaries (typical sliding window problem), its input pixel value is replaced by the central window pixel.
Linear Filter behavior at the LLE-ROI boundaries.
Related topics - GenApi Reference (Data Stream module)