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178

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5

answers

63k

views

“River” detection in text

image-processing

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133

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fourier-transform

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120

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6

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image-processing frequency-spectrum dft

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94

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9

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frequency

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86

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3

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fft filters

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84

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fft zero-padding

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81

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dct dft

Sep 30 '18 at 15:46 Community♦ 1

75

votes

4

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What is meant by a system's “impulse response” and “frequency response?”

frequency impulse-response linear-systems frequency-response

Jan 18 '18 at 14:47 Community♦ 1

72

votes

4

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What are some free alternatives to SIFT/ SURF that can be used in commercial applications?

image-processing computer-vision local-features sift

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69

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9

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image-processing computer-vision

Sep 22 '19 at 21:49 Community♦ 1

64

votes

7

answers

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How do I implement cross-correlation to prove two audio files are similar?

audio fft waveform-similarity cross-correlation

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57

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What Is the Relationship Between a Kalman Filter and Polynomial Regression?

kalman-filters least-squares bayesian-estimation

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56

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8

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What are some good signal and image processing blogs worth following?

image-processing

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56

votes

2

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Why so many methods of computing PSD?

frequency-spectrum power-spectral-density

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54

votes

6

answers

52k

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What is the distinction between ergodic and stationary?

random ergodic

Nov 28 '19 at 0:10 Community♦ 1

53

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4

answers

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Analogous Library to OpenCV for Audio Processing / Analysis

image-processing audio

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51

votes

5

answers

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What is the difference between convolution and cross-correlation?

convolution autocorrelation cross-correlation

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49

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3

answers

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What is the sparse Fourier transform?

fourier-transform

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47

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Point Pattern Recognition

image-processing computer-vision image-registration

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46

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3

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What algorithm does Google use for its “Search By Image” site?

image-processing computer-vision

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45

votes

5

answers

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What is the difference between phase delay and group delay?

filters audio phase group-delay

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43

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6

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Simplest way of detecting where audio envelopes start and stop

filters audio filter-design

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43

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Meaning of Hilbert Transform

signal-analysis hilbert-transform

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41

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answers

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What Properties Make Certain Wavelets “Better” Than Others In Image Compression?

image-processing wavelet

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40

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Why is the FFT “mirrored”?

dft

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What are the most common algorithms for adaptive thresholding?

image-processing thresholding

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Is there an algorithm for finding a frequency without DFT or FFT?

audio fft frequency dft

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python matlab image-processing opencv computer-vision

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filters digital-communications matched-filter

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algorithms image-processing edge-detection

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“River” detection in text

Why is the Fourier transform so important?

What does frequency domain denote in case of images?

What is the physical significance of negative frequencies?

Why is it a bad idea to filter by zeroing out FFT bins?

Why should I zero-pad a signal before taking the Fourier transform?

What is the difference between a Fourier transform and a cosine transform?

What is meant by a system's “impulse response” and “frequency response?”

What are some free alternatives to SIFT/ SURF that can be used in commercial applications?

Why do we use the HSV colour space so often in vision and image processing?

How do I implement cross-correlation to prove two audio files are similar?

What Is the Relationship Between a Kalman Filter and Polynomial Regression?

What are some good signal and image processing blogs worth following?

Why so many methods of computing PSD?

What is the distinction between ergodic and stationary?

Analogous Library to OpenCV for Audio Processing / Analysis

What is the difference between convolution and cross-correlation?

What is the sparse Fourier transform?

Point Pattern Recognition

What algorithm does Google use for its “Search By Image” site?

What is the difference between phase delay and group delay?

Simplest way of detecting where audio envelopes start and stop

Meaning of Hilbert Transform

What Properties Make Certain Wavelets “Better” Than Others In Image Compression?

Why is the FFT “mirrored”?

What are the most common algorithms for adaptive thresholding?

Is there an algorithm for finding a frequency without DFT or FFT?

Finding squares in Image

Understanding the Matched Filter

What factors should I consider in choosing an edge detection algorithm?