Rank: 153 based on 304 downloads (last 30 days) and 8 files submitted
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SANTIAGO AJA-FERNANDEZ

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Universidad de Valladolid

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11 Jul 2013 Screenshot Soft thresholding for image segmentation Image segmentation based on histogram soft thresholding Author: SANTIAGO AJA-FERNANDEZ segmentation, image processing, thresholding, fuzzy 177 10
  • 4.5
4.5 | 2 ratings
12 Jun 2012 Screenshot LMMSE filter for Rician MRI data A filtering scheme for denoising MR data assuming an underlying Rician model. Author: SANTIAGO AJA-FERNANDEZ mri, noise, denoising, image filtering, image processing 39 2
31 May 2012 Screenshot Quality Index based on Local Variance (QILV) Method to assess image quality based on local variance comparison with Golden Standard Author: SANTIAGO AJA-FERNANDEZ image processing, quality, quality assessment, local variance, image quality 10 0
  • 5.0
5.0 | 1 rating
29 May 2012 Screenshot Parallel MRI noisy phantom simulator Simulator of noisy parallel acquisition MR data (GRAPPA and SENSE included) Author: SANTIAGO AJA-FERNANDEZ magnetic resonance, noise, parallel imaging, phantom, noise simulator, image processing 17 1
  • 5.0
5.0 | 1 rating
29 May 2012 Screenshot Detail Preserving Anosotropic Diffusion for Speckle Filtering (DPAD) DPAD applies an anisotropic diffusion scheme to an image with multiplicative speckle Author: SANTIAGO AJA-FERNANDEZ anisotropic diffusion, speckle, noise estimation, noise filtering, ultrasound, image processing 28 3
  • 5.0
5.0 | 2 ratings
Comments and Ratings by SANTIAGO View all
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29 Nov 2012 Detail Preserving Anosotropic Diffusion for Speckle Filtering (DPAD) DPAD applies an anisotropic diffusion scheme to an image with multiplicative speckle Author: SANTIAGO AJA-FERNANDEZ

What you have called I0 must be the input image. Note that you cannot name a variable with a number in matlab. Try Io instead. In addition, it is not an example, but an example of use. You must have some image Io and use it as your input.

25 Jun 2012 Soft thresholding for image segmentation Image segmentation based on histogram soft thresholding Author: SANTIAGO AJA-FERNANDEZ

Modify anything you want, of course. It should be easy. I cannot say when next version will be ready, sorry. I'll try to do it along these months.

18 Jun 2012 Soft thresholding for image segmentation Image segmentation based on histogram soft thresholding Author: SANTIAGO AJA-FERNANDEZ

The function is a basic implementation thought for 2D, but with very small changes it could work for 3D. The square neighborhoods used for smoothing and aggregation must be replaced by 3D neighborhoods. (I'll do it for the next version...)

12 Jun 2012 LMMSE filter for Rician MRI data A filtering scheme for denoising MR data assuming an underlying Rician model. Author: SANTIAGO AJA-FERNANDEZ

The method now requires to choose one of the existing noise estimation methods as an input: (See help)

I_est=MRI_lmmse(I,[7,7],'mode2N');

However, I have just realized that the function moda.m is not in the toolbox. I upload now a new version with this fixed, and a default option

01 Jun 2012 Soft thresholding for image segmentation Image segmentation based on histogram soft thresholding Author: SANTIAGO AJA-FERNANDEZ

The original file lacks of a control for more than 5 output sets. New version with problem corrected is added.

Comments and Ratings on SANTIAGO's Files View all
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29 Jul 2013 Quality Index based on Local Variance (QILV) Method to assess image quality based on local variance comparison with Golden Standard Author: SANTIAGO AJA-FERNANDEZ Bouhrara, Mustapha

28 Jul 2013 Parallel MRI noisy phantom simulator Simulator of noisy parallel acquisition MR data (GRAPPA and SENSE included) Author: SANTIAGO AJA-FERNANDEZ Bouhrara, Mustapha

Thank you for this excellent job. Really helpful.
MB

22 Jul 2013 Soft thresholding for image segmentation Image segmentation based on histogram soft thresholding Author: SANTIAGO AJA-FERNANDEZ Ramkumar

thank u for sharing

08 Jul 2013 Soft thresholding for image segmentation Image segmentation based on histogram soft thresholding Author: SANTIAGO AJA-FERNANDEZ Al Okashi, Omar

Dear Sir..
Thanx alot about sharing... I can not run it because of this error:

??? Error using ==> shiftmat
Too many input arguments.

Error in ==> seg_fuzzy at 207
M_tmp = shiftmat(Mx,i,1);

can you explain us how to implement it..
with my Regards...

03 Jul 2013 Detail Preserving Anosotropic Diffusion for Speckle Filtering (DPAD) DPAD applies an anisotropic diffusion scheme to an image with multiplicative speckle Author: SANTIAGO AJA-FERNANDEZ Derya

Worked great for an image with uneven illumination - I was able to smooth out the background and increase the contrast in the image greatly. Great job, thanks for sharing. (though it's slow for large images)

Top Tags Applied by SANTIAGO
image processing, mri, magnetic resonance, noise, noise estimation
Files Tagged by SANTIAGO View all
Updated   File Tags Downloads
(last 30 days)
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11 Jul 2013 Screenshot Soft thresholding for image segmentation Image segmentation based on histogram soft thresholding Author: SANTIAGO AJA-FERNANDEZ segmentation, image processing, thresholding, fuzzy 177 10
  • 4.5
4.5 | 2 ratings
12 Jun 2012 Screenshot LMMSE filter for Rician MRI data A filtering scheme for denoising MR data assuming an underlying Rician model. Author: SANTIAGO AJA-FERNANDEZ mri, noise, denoising, image filtering, image processing 39 2
31 May 2012 Screenshot Quality Index based on Local Variance (QILV) Method to assess image quality based on local variance comparison with Golden Standard Author: SANTIAGO AJA-FERNANDEZ image processing, quality, quality assessment, local variance, image quality 10 0
  • 5.0
5.0 | 1 rating
29 May 2012 Screenshot Parallel MRI noisy phantom simulator Simulator of noisy parallel acquisition MR data (GRAPPA and SENSE included) Author: SANTIAGO AJA-FERNANDEZ magnetic resonance, noise, parallel imaging, phantom, noise simulator, image processing 17 1
  • 5.0
5.0 | 1 rating
29 May 2012 Screenshot Detail Preserving Anosotropic Diffusion for Speckle Filtering (DPAD) DPAD applies an anisotropic diffusion scheme to an image with multiplicative speckle Author: SANTIAGO AJA-FERNANDEZ anisotropic diffusion, speckle, noise estimation, noise filtering, ultrasound, image processing 28 3
  • 5.0
5.0 | 2 ratings

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