Howtosignalprocessing
What is a LTI filter?
A linear time-invariant (LTI) filter can be uniquely specified by its impulse response h, and the output of any filter is mathematically expressed as the convolution of the input with that impulse response.
What are linear filters used for?
Linear filters are used for generic tasks such as image/video contrast improvement, denoising, and sharpening, as well as for more object- or feature-specific tasks such as target matching and feature enhancement.
What is linear filter in time series?
A linear filter is an operation L which transforms a time series X = X(t) into another time series Y = Y (t), Y (t) = L(X)(t), t ∈ Z.
