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.
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image-processing× 527
any form of signal processing for which the input is an image, such as a photograph or video frame.
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matlab× 275
a numerical computing environment and a fourth-generation programming language. Use this tag with care.. see excerpt.
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fft× 274
an efficient algorithm to compute the discrete Fourier transform (DFT) and its inverse.
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filters× 253
a device or process that transforms a signal by selectively choosing specific frequencies and leaving others with appropriate gain or as it is.
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computer-vision× 193
Computer vision includes methods of processing, analyzing, images and high-dimensional data to form high level understanding and recognition of the scene or images.
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audio× 184
Audio, or in terms of signal processing, an audio signal is an analog or digital representation of sound, typically as an electrical voltage.
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discrete-signals× 142
A discrete signal or discrete-time signal is a time series consisting of a sequence of quantities.
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fourier-transform× 128
a mathematical operation that decomposes a function into its constituent frequencies, known as a frequency spectrum.
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frequency-spectrum× 112
The frequency spectrum of a time-domain signal is a representation of that signal in the frequency domain.
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frequency× 109
the number of cycles (of the signal) per second.
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filter-design× 93
the process of designing a filter.
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noise× 90
In signal processing noise can be considered random unwanted data without meaning.
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algorithms× 86
a method expressed in a finite list of steps of well-defined instructions to process a signal.
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opencv× 78
a cross-platform library of programming functions for real time computer vision.
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image× 71
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…
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convolution× 70
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.
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dft× 67
a mapping between a finite set of discrete points in the frequency and time domains. DFT requires an input function which is discrete and non-zero, such as a s…
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sampling× 61
the reduction of a continuous signal to a discrete signal.
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wavelet× 61
a wave-like oscillation with an amplitude that starts out at zero, increases, and then decreases back to zero.
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lowpass-filter× 56
an electronic filter that passes low-frequency signals but attenuates signals with frequencies higher than the cutoff frequency.
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image-segmentation× 51
image-segmentation refers to the process of partitioning a digital image into multiple segments, typically to locate objects and boundaries.
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signal-analysis× 48 |
modulation× 45
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…
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digital-communications× 45
the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel.
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homework× 40
requesting help with school homework. This lets potential answerers know that they should guide the student in solving the problem, rather than simply showing the complete …
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signal-detection× 40 |
continuous-signals× 38
A continuous signal or a continuous-time signal is a varying quantity (a signal) whose domain, which is often time, is a continuum.
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kalman-filters× 37
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…
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| cross-correlation× 34 |
speech-recognition× 34
the process of converting the spoken word to text, usually without regard to a particular speaker (which is more commonly referred to as "voice recognition").
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python× 33
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 …
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edge-detection× 32
the process of identifying points in an image, where image brightness changes sharply.
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demodulation× 31
the act of extracting the original information-bearing signal from a modulated carrier wave.
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sound× 31 |
frequency-response× 30
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.
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impulse-response× 30
its output when presented with a brief input signal, called an impulse.
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