Rank: 640 based on 218 downloads (last 30 days) and 13 files submitted
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MANISH KUMAR SHARMA

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Company/University
GNIT Girls Institute of Technology, Greater Noida

Personal Profile:

Brief-Data :

MANISH KUMAR SHARMA
S/o Late. Dr. MAHATAM PRASAD,
Born in Peppeganj, Distt-Gorakhpur.

Schooling- Jawahar Navodaya Vidyalaya, Gorakhpur
Graduated B.Tech- C.S.E from IMS Engineering College, Ghaziabad
Post Graduate M.Tech- C.S.E from C-DAC, noida.

Professional Interests:
Research & Development [Digital Image Processing, Vission System, Pattern Recognition, Computer Graphics, DBMS, DAA, Multimedia]

 

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Files Posted by MANISH KUMAR SHARMA View all
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(last 30 days)
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10 Apr 2011 Screenshot weighted median filter weighted median filter using weighted mask. Author: MANISH KUMAR SHARMA image processing, biotech, signal processing, simulation, simulink, statistics 21 2
  • 2.5
2.5 | 2 ratings
13 Mar 2011 MATLAB TUTOTIAL MATLAB for new candidate Author: MANISH KUMAR SHARMA image processing, biotech, signal processing, statistics 9 0
  • 4.0
4.0 | 3 ratings
07 Mar 2011 Screenshot segmentation The segmentation of RGB image. Author: MANISH KUMAR SHARMA image processing, biotech, statistics, biometrics 14 0
02 Mar 2011 Screenshot mean vector of RGB image finding mean vector of RGB image Author: MANISH KUMAR SHARMA image processing, mathematics, measurement, biotech, aerospace, signal processing 14 1
  • 2.0
2.0 | 2 ratings
02 Dec 2010 Screenshot co- ordinate values of RGB image finding co ordinate values of RGB image and some other information retrival.. Author: MANISH KUMAR SHARMA biotech, image processing, signal processing, statistics, mathematics 12 1
Comments and Ratings on MANISH KUMAR SHARMA's Files View all
Updated File Comment by Comments Rating
02 Nov 2013 weighted median filter weighted median filter Author: MANISH KUMAR SHARMA mtl

values at the sorted data set must be duplicated, not multiplied.

16 Aug 2013 weighted median filter weighted median filter Author: MANISH KUMAR SHARMA Khan, Sajid

I have done a few changes in it

%% MANISH KUMAR SHARMA, cdac-noida, 2010
% ccc
%% weighted median filter on image with salt & pepper noise %%
I = rgb2gray(imread('lena.jpg'));
I = im2double(I);
Z = imnoise(I,'salt & pepper',0.02); % adding Noise
mask_size = 3;
mask_cent = ceil(mask_size/2);
mask_start = mask_cent - 1;
W = ones(mask_size);
W(mask_cent, mask_cent) = 4;
sum_W = sum(W(:));
W = W./sum_W; % the values should taken like that, the total sum of values of filter
% is divided by there sum and value should be equal to 1.
image_padded = padarray(Z,[mask_start, mask_start],'symmetric','both');
[row, col] = size(Z);
row_pad = row + 2 * mask_start;
col_pad = col + 2 * mask_start;
b = Z;

for x = mask_cent:row_pad - mask_start
for y = mask_cent:col_pad - mask_start
%% To make a 3x3 weighted mask into a 1x9 mask
patch_selected = image_padded(x - mask_start: x + mask_start, y - mask_start: y + mask_start);
a1 = W.*patch_selected;
med = median(a1(:))*sum_W; % the 5th value is the weighted median
b(x,y) = med;
end

end
figure(1); imshow((Z))
figure(2); imshow(b)

13 Aug 2013 weighted median filter weighted median filter Author: MANISH KUMAR SHARMA Emambakhsh, Mehryar

This file does not do weighted median filtering, based on its definition. Weighting in med filtering means "repeating" the central value not multiplying a mask with it.

08 Apr 2013 weighted median filter weighted median filter Author: MANISH KUMAR SHARMA Stein, Noah

Setting aside the concerns of others about user-configurability, it is worth noting that this code does not implement anything resembling a weighted median. One way to see this is that in a weighted median the weights are not multiplied by the data values like they are in a weighted mean.

28 Mar 2013 weighted median filter weighted median filter using weighted mask. Author: MANISH KUMAR SHARMA Robert, Dennis

The code calculates the product of the matrix elements with their corresponding weights in the W matrix? This is not how weighted median should be calculated.

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