Signal Processing Stack Exchange

1

vote

1

answer

46

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Mathematical description of the ACF using fft2

fft autocorrelation

modified 53 mins ago oma11 6

1

vote

1

answer

50

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Histogram of Gradient

modified 55 mins ago Royi 7,598

7

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1

answer

2k

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Scanning from Book - Gradient Removal

image-processing

modified 57 mins ago Royi 7,598

0

votes

1

answer

3

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The Gradient of 2D Image Convolution

image-processing convolution deconvolution linear-algebra gradient

modified 1 hour ago Royi 7,598

0

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0

answers

2

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How many ways are generally used for Image segmentation using Image processing?

image-processing image image-segmentation

asked 1 hour ago Learning 1

0

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1

answer

167

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Convolution in Image Processing

image-processing convolution gabor

modified 1 hour ago Royi 7,598

2

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1

answer

138

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Wiener Filters - Obtaining /Estimating Image and Noise Spectrum

image-processing filters estimation wiener-filter

modified 1 hour ago Royi 7,598

6

votes

1

answer

229

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Analytical Expression for Convolution of Two 2D DFTs

image-processing dft convolution

modified 1 hour ago Royi 7,598

0

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2

answers

39

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Image Brightness on 2D Fourier Transformation

image-processing fourier-transform

modified 1 hour ago Royi 7,598

2

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1

answer

1k

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Convolution Based Image Interpolation

image-processing convolution interpolation

modified 1 hour ago Royi 7,598

1

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1

answer

2k

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Convolution in Image Processing?

image-processing image convolution

modified 1 hour ago Royi 7,598

2

votes

1

answer

239

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Algo Name: Detecting Elongated Shape in 2D Image by Convolution with Directed Lines

image-processing computer-vision object-recognition hough-transform morphological-operations

modified 1 hour ago Royi 7,598

1

vote

1

answer

463

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How to Do Convolution a 2D Signal (Image) and Result of Convolution of Two 1D Filters?

image-processing matlab filters convolution continuous-signals

modified 1 hour ago Royi 7,598

1

vote

1

answer

131

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Detection Algorithm in 2D Images

image-processing image

modified 1 hour ago Royi 7,598

0

votes

2

answers

105

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Generate 3D image from Multiple 2D Images

image-processing computer-vision 3d

modified 1 hour ago Royi 7,598

17

votes

3

answers

7k

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How to Detect Gradients and Edges in Images?

image-processing computer-vision gradient

modified 1 hour ago Royi 7,598

2

votes

1

answer

164

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Morphological Gradient Versus Linear Gradient in Image Processing

image-processing filtering gradient morphological-operations

modified 1 hour ago Royi 7,598

0

votes

1

answer

465

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2D DWT Image Issue

image-processing wavelet opencv multi-scale-analysis

modified 1 hour ago Royi 7,598

1

vote

1

answer

2k

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What Does It Mean by Gradient / Divergence / Curl of a 2D Image $ g \left( x, y \right) $?

image-processing

modified 1 hour ago Royi 7,598

1

vote

2

answers

12k

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How to Compute Image Gradients?

image-processing opencv gradient

modified 1 hour ago Royi 7,598

4

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1

answer

374

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2D Convolution in MATLAB Causes Artifacts (Boundary Issues)

image-processing matlab fft convolution 2d

modified 1 hour ago Royi 7,598

0

votes

1

answer

2k

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Convolution and Cross Correlation on 2D Image

image-processing filters convolution cross-correlation neural-network

modified 1 hour ago Royi 7,598

0

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0

answers

8

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Cross Correlation as Noise Reduction, is this possible?

noise cross-correlation

asked 2 hours ago StephenJ 43

0

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0

answers

6

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Optical flow Horn & Schunck smoothness error

image-processing computer-vision tracking optical-flow

asked 7 hours ago W0000m 1

0

votes

0

answers

3

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What are i-vectors and x-vectors in the context of Speech Recognition?

speech-processing speech-recognition speech

asked 8 hours ago flyingDope 101

0

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1

answer

43

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How to get Fourier coefficients to draw any shape using DFT?

dft fourier-series

answered 9 hours ago Cedron Dawg 3,344

0

votes

1

answer

90

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What is the meaning of inverse signal bandwidth?

digital-communications bandwidth delay

modified 10 hours ago Community♦ 1

1

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0

answers

7

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Role of Riccati Equations in Kalman Filter Design

kalman-filters covariance simulink

asked 11 hours ago Simon Diemert 6

0

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0

answers

5

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Papers/ guidance on the practicality of converting quantization steps (pixel) into phase adjustment (frequency) for CMOS images

fft ifft quantization

asked 11 hours ago JimD UK 1

0

votes

1

answer

56

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Fourier like spectral analysis with uneven intervals and redesigned DFT matrix

frequency-spectrum sampling dft spectrogram

modified 12 hours ago Community♦ 1

0

votes

1

answer

29

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Notch filters: why is R(0) = R(π)?

filters filter-design

answered 13 hours ago Matt L. 52.2k

0

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0

answers

11

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How to find out that a wav file is edited or original in Python?

audio python digital-filters audio-processing

asked 13 hours ago Asif Salman Malik 1

2

votes

2

answers

80

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Is there a rule of thumb for zero padding in image processing?

image-processing fft image zero-padding

modified 14 hours ago Glorfindel 241

0

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0

answers

15

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Window function correction when using frequency domain likelihood

fft window-functions window maximum-likelihood-estimation

asked 14 hours ago elenasto 13

0

votes

0

answers

13

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Can we band pass filter QPSK signal?

filters digital-communications soft-question

asked 15 hours ago Creator 268

0

votes

1

answer

20

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Subtract audio to another audio

audio artificial-intelligence

answered 16 hours ago Hilmar 10.9k

1

vote

1

answer

16

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What impact have different types of border-handling on high pass or low pass filtering?

image-processing lowpass-filter opencv highpass-filter

answered 17 hours ago Rakshit Kothari 51

0

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2

answers

36

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Nulling odd samples of the FFT of a signal

fft dft

answered 17 hours ago Dsp guy sam 4

0

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0

answers

10

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Early estimate the sign of the drift in a generalized Wiener process

random-process

asked 18 hours ago groviere 1

1

vote

1

answer

35

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Find the noise settings to reproduce it

noise

modified 18 hours ago Community♦ 1

-2

votes

0

answers

22

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How can I prove this properties of Auto correlation? [on hold]

discrete-signals signal-analysis continuous-signals autocorrelation cross-correlation

modified 18 hours ago SUNITA GUPTA 1

-1

votes

0

answers

14

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What is definition of cross correlation function?

discrete-signals signal-analysis continuous-signals autocorrelation cross-correlation

modified 18 hours ago SUNITA GUPTA 1

0

votes

1

answer

29

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What principles to use, in order to create field that will be read by OCR?

image-processing image opencv ocr pattern

modified yesterday Community♦ 1

0

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0

answers

13

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Scalable/vectorizable way of thresholding a time series with a changing baseline value

signal-detection time-series

asked yesterday user247243 115

0

votes

0

answers

10

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Not sure why I get errors of missing blocks when trying examples in Gnuradio Companion

gnuradio sdr usrp

asked yesterday Hadad 1

0

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0

answers

10

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Differentiating high frequencies if a signal

noise lowpass-filter filtering

asked yesterday Hamed 1

0

votes

1

answer

27

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FFT command line application?

fft reference-implementation

modified yesterday MBaz 9,180

0

votes

1

answer

44

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Calculating phase of DFT sinewave?

dft

modified yesterday Community♦ 1

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