Mathematically, a Gaussian filter modifies the input signal by convolution with a Gaussian function; this transformation is also known as the Weierstrass...

wavelengths. UV filters are sometimes referred to as L37 or L39 filters, depending on the wavelengths of light they filter out. For example, an L37 filter removes...

For statistics and control theory, Kalman filtering, also known as linear quadratic estimation, is an algorithm that uses a series of measurements observed...

filter depends on the filter design. The filter is sometimes called a high-cut filter, or treble-cut filter in audio applications. A low-pass filter is...

Prototype filters are electronic filter designs that are used as a template to produce a modified filter design for a particular application. They are...

Euclidean geometry, an affine transformation or affinity (from the Latin, affinis, "connected with") is a geometric transformation that preserves lines and...

The Butterworth filter is a type of signal processing filter designed to have a frequency response that is as flat as possible in the passband. It is also...

An anti-aliasing filter (AAF) is a filter used before a signal sampler to restrict the bandwidth of a signal to satisfy the Nyquist–Shannon sampling theorem...

(k)=ik{\widehat {f}}(k)} , we see that the filter performs an operation similar to a derivative. Roughly speaking, then, the filter makes objects more singular. A...

Digital filters are used to blur and sharpen digital images. Filtering can be performed by: convolution with specifically designed kernels (filter array)...