User nbro

1

5

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3

answers

1k

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What is energy in image processing?

Nov 4 '19 at 21:21 Laurent Duval 25.3k

2

4

votes

3

answers

2k

views

How to Zero Pad in Order to Perform Filtering in the Fourier (Frequency) Domain?

image-processing fourier-transform computer-vision convolution zero-padding

Oct 18 at 6:57 Royi 16.3k

1

3

votes

1

answer

734

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What is the relation between time, frequency, spatial and spectral domains?

image-processing computer-vision terminology

May 4 at 17:00 Community♦ 1

3

votes

1

answer

260

views

What is the difference between an impulse response and a kernel?

image-processing filters computer-vision impulse-response terminology

Apr 18 at 10:58 alvitawa 111

2

votes

3

answers

557

views

What do we mean by spectrum?

image-processing computer-vision terminology

Nov 29 at 17:22 Laurent Duval 25.3k

1

2

votes

0

answers

74

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How does the “additive operator splitting” exactly work?

image-processing computer-vision filtering non-linear anisotropic-diffusion

Jun 2 '19 at 11:38 nbro 395

2

votes

0

answers

224

views

Intuitively, why is the comb function the sampling function?

image-processing sampling computer-vision

Mar 28 '19 at 11:41 nbro 395

1

vote

2

answers

377

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How Is the Gaussian Kernel Related to the Euclidean Distance of the Neighborhoods in the Non Local Means Denoising Algorithm?

image-processing matlab filters computer-vision denoising

Sep 22 at 17:18 Royi 16.3k

1

vote

2

answers

190

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Why do we need multiple layers in each octave and multiple octaves in SIFT?

feature-extraction sift

Jun 25 at 7:18 Olli Niemitalo 11.7k

1

vote

2

answers

181

views

What Is the Relation Between Deblurring and Deconvolution in Computer Vision and Image Processing?

image-processing computer-vision deconvolution inverse-problem blur

May 20 '19 at 18:21 Fat32 23.8k

1

vote

2

answers

219

views

Why can convolution only be applied to compute the output of a linear filter?

image-processing filters computer-vision convolution linear-systems

Apr 10 '19 at 13:50 Izzo 608

1

vote

2

answers

235

views

Why isn't bilateral filtering shift-invariant?

image-processing filters computer-vision convolution

Apr 8 '19 at 13:54 Olli Niemitalo 11.7k

1

vote

1

answer

345

views

What is a periodic signal in image processing?

image-processing fourier-transform computer-vision periodic terminology

Apr 4 '19 at 1:40 user559678 21

0

votes

1

answer

86

views

What does this notation $g(x) = S\{\delta(t) \}(x)$ mean?

image-processing linear-systems notation

Jan 14 at 2:01 Community♦ 1

0

votes

1

answer

170

views

What is the difference between an image plane and a virtual image?

image-processing computer-vision camera

Dec 18 at 4:07 Community♦ 1

0

votes

0

answers

102

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How does Lowe's ratio test work when you compute more than 2 nearest neighbours?

computer-vision feature-extraction sift feature-detection

May 21 at 16:25 nbro 395

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votes

0

answers

22

views

What is the difference between template matching and object detection?

image-processing computer-vision object-recognition sift template-matching

May 20 at 23:05 nbro 395

0

votes

1

answer

42

views

What's the purpose of augmenting an image with a random “gradient”?

computer-vision python machine-learning preprocessing

Feb 26 at 15:00 sansuiso 3,719

0

votes

2

answers

289

views

What do the 1D filters represent when using imfilter?

image-processing matlab filters computer-vision convolution

Jun 5 '19 at 8:16 Florian 2,051

0

votes

1

answer

33

views

Why is the anisotropic diffusion equivalent to the heat equation when using a constant diffusion coefficient?

image-processing math proof anisotropic-diffusion

May 30 '19 at 16:13 nbro 395

0

votes

1

answer

324

views

What is the difference between domain and range filtering?

image-processing computer-vision image filtering terminology

Apr 3 '19 at 21:47 nbro 395

0

votes

0

answers

38

views

What is the difference between a range filter and a low-pass filter?

image-processing filters computer-vision lowpass-filter

Mar 29 '19 at 11:43 nbro 395

0

votes

1

answer

41

views

Why exactly is the Guassian filter a low-pass filter?

image-processing computer-vision lowpass-filter

Mar 28 '19 at 16:25 Hilmar 18.1k

1

0

votes

2

answers

188

views

What is the basic idea behind Fourier transform? [closed]

fourier-transform fourier fourier-series

Jan 21 '19 at 18:09 nbro 395

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24 Questions

What is energy in image processing?

How to Zero Pad in Order to Perform Filtering in the Fourier (Frequency) Domain?

What is the relation between time, frequency, spatial and spectral domains?

What is the difference between an impulse response and a kernel?

What do we mean by spectrum?

How does the “additive operator splitting” exactly work?

Intuitively, why is the comb function the sampling function?

How Is the Gaussian Kernel Related to the Euclidean Distance of the Neighborhoods in the Non Local Means Denoising Algorithm?

Why do we need multiple layers in each octave and multiple octaves in SIFT?

What Is the Relation Between Deblurring and Deconvolution in Computer Vision and Image Processing?

Why can convolution only be applied to compute the output of a linear filter?

Why isn't bilateral filtering shift-invariant?

What is a periodic signal in image processing?

What does this notation $g(x) = S\{\delta(t) \}(x)$ mean?

What is the difference between an image plane and a virtual image?

How does Lowe's ratio test work when you compute more than 2 nearest neighbours?

What is the difference between template matching and object detection?

What's the purpose of augmenting an image with a random “gradient”?

What do the 1D filters represent when using imfilter?

Why is the anisotropic diffusion equivalent to the heat equation when using a constant diffusion coefficient?

What is the difference between domain and range filtering?

What is the difference between a range filter and a low-pass filter?

Why exactly is the Guassian filter a low-pass filter?

What is the basic idea behind Fourier transform? [closed]