Rank: 291 based on 366 downloads (last 30 days) and 5 files submitted
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Ritwik Kumar

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Computer Vision, Machine Learning, Medical Image Analysis

 

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17 Jul 2010 Screenshot Diffusion Filtering for Image Denoising Linear diffusion filtering, edge-enhancing linear and non-linear anisotropic filtering Author: Ritwik Kumar image filtering, diffusion filtering, linear diffusion, nonlinear diffusion, isotropic diffusion, anisotropic diffusion 90 11
02 Jul 2010 Screenshot Snakes: Active Contour Models Implements snakes or active contour models for image segmentation. Author: Ritwik Kumar active contour models, snake, image segmentation 159 17
  • 4.0
4.0 | 11 ratings
30 Jun 2010 Screenshot Radon-Like Features Radon-Like Features can be used for image segmentation and classification. Author: Ritwik Kumar image processing, segmentation, classification, features, computer vision, connectome 47 1
  • 4.0
4.0 | 1 rating
26 Jun 2010 Screenshot Volterrafaces Face Recognition System Discriminant Analysis Using Volterra Kernels Author: Ritwik Kumar volterrafaces, face recognition, discriminant analysis, volterra kernels 43 0
16 Jun 2010 Screenshot Cartesian Tensor Face Relighting This code demonstrates the use of Cartesian Tensors (3rd order) for face image relighting. Author: Ritwik Kumar face relighting, brdf, apparent brdf, bidirectional reflect..., image processing, face analysis 27 0
Comments and Ratings by Ritwik View all
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21 Jul 2010 Diffusion Filtering for Image Denoising Linear diffusion filtering, edge-enhancing linear and non-linear anisotropic filtering Author: Ritwik Kumar

@jichao, Image denoising

17 Jul 2010 Diffusion Filtering for Image Denoising Linear diffusion filtering, edge-enhancing linear and non-linear anisotropic filtering Author: Ritwik Kumar

Hi Jane, it seemed like a typo in the comment. I fixed it and the updated files should be available soon. Thanks for pointing it out.

15 Jul 2010 Diffusion Filtering for Image Denoising Linear diffusion filtering, edge-enhancing linear and non-linear anisotropic filtering Author: Ritwik Kumar

I think so, please try it and if you run into some trouble, let me know and I can suggest some work around.

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18 May 2014 Diffusion Filtering for Image Denoising Linear diffusion filtering, edge-enhancing linear and non-linear anisotropic filtering Author: Ritwik Kumar Avital, Royi

What about implementing the following method:

https://github.com/JarnoRalli/PDE-based-image-processing/issues/1

12 Apr 2014 Snakes: Active Contour Models Implements snakes or active contour models for image segmentation. Author: Ritwik Kumar Hamid, Rashid

12 Apr 2014 Snakes: Active Contour Models Implements snakes or active contour models for image segmentation. Author: Ritwik Kumar Hamid, Rashid

28 Mar 2014 Snakes: Active Contour Models Implements snakes or active contour models for image segmentation. Author: Ritwik Kumar anuja

I'm having the same problem as Susan and Somy. I tried using uint8 images as suggested by Deepak, but I still got the same error. Did any of you successfully try this on your own images? If yes, please help with this error.

22 Jan 2014 Snakes: Active Contour Models Implements snakes or active contour models for image segmentation. Author: Ritwik Kumar Daniel

This algorithm looks like just what I need for a project I'm working on, but I'm having a problem in the step where interp2 executes. Specifically,

interp2(fx,xs,ys)

returns a vector where the interior elements are all NaN while the first few and last few are what could be reasonable values.

I'm feeding the function a solid binary block that has been converted to double (so all 1's are now 127 and all 0's are still 0), could this be a problem in that the gradient is very sudden?

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