A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
any form of signal processing for which the input is an image, such as a photograph or video frame.
a numerical computing environment and a fourth-generation programming language. Use this tag with care.. see excerpt.
an efficient algorithm to compute the discrete Fourier transform (DFT) and its inverse.
a device or process that transforms a signal by selectively choosing specific frequencies and leaving others with appropriate gain or as it is.
A discrete signal or discrete-time signal is a time series consisting of a sequence of quantities.
a mathematical operation that decomposes a function into its constituent frequencies, known as a frequency spectrum.
Audio, or in terms of signal processing, an audio signal is an analog or digital representation of sound, typically as an electrical voltage.
the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel.
The frequency spectrum of a time-domain signal is a representation of that signal in the frequency domain.
In signal processing noise can be considered random unwanted data without meaning.
the process of designing a filter.
the reduction of a continuous-domain signal to a discrete-domain signal.
a high-level interpreted general programming language. Python has popular numerical and scientific libraries/packages, most notably numpy and scipy. The scipy.signal package is a powerful …
Computer vision includes methods of processing, analyzing, images and high-dimensional data to form high level understanding and recognition of the scene or images.
a mapping between a finite set of discrete points in a (primal) domain (time, space) and the dual frequency domain. DFT requires an input sequence which is di…
a mathematical operation on two functions f and g, producing a third function that is typically viewed as a modified version of one of the original functions.
the number of cycles (of the signal) per second.
A continuous signal or a continuous-time signal is a varying quantity (a signal) whose domain, which is often time, is a continuum.
the distribution of signal power over frequencies.
an electronic filter that passes low-frequency signals but attenuates signals with frequencies higher than the cutoff frequency.
a wave-like oscillation with an amplitude that starts out at zero, increases, and then decreases back to zero.
covers signal processing where input is an image, such as a photograph or video frame and the output could be an improved or altered image, parameters related to the image or information abou…
A linear system operates on inputs with only linear operators so the response to a complex input can be analysed as the sum of the response to a set of simpler inputs. This mathematical property makes…
the process of varying one or more properties of a high-frequency periodic waveform, called the carrier signal, with the amplitude of low-frequence modulating signal which typically cont…
The Z-transform converts a discrete time-domain signal, which is a sequence of real or complex numbers, into a complex frequency-domain representation.
filters with a finite duration impulse response.
a method expressed in a finite list of steps of well-defined instructions to process a signal.
the cross-correlation of a signal with itself.
a property of signal processing systems.
a cross-platform library of programming functions for real time computer vision.
a mathematical representation of relationship between input and output (signal) of a linear, time-invariant system.
the quantitative measure of the output spectrum of a system or device in response to a stimulus, and is used to characterize the dynamics of the system.
a mathematical method using noisy measurements observed over time to produce values that tend to be closer to the true values of the measurements and their associated calculated v…
its output when presented with a brief input signal, called an impulse.