Rank: 2946 based on 37 downloads (last 30 days) and 2 files submitted
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Harald E. Krogstad

E-mail
Company/University
NTNU
Lat/Long
64.0, -7.0

Personal Profile:

Professor at Dept. Mathematical Sciences, NTNU, Trondheim, Norway

Professional Interests:
Applied Mathematics, Signal processing, stochastic analysis

 

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Files Posted by Harald E. View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
18 Jul 2006 Digitizing Graphs Digitization of graphs only existing as bitmaps Author: Harald E. Krogstad whitepaper, article, paper, digitization, graphs, ginput 15 3
  • 2.0
2.0 | 3 ratings
05 Jul 2006 How to use FFT2 How to apply the 2D FFT functions in Matlab Author: Harald E. Krogstad filtering, fft, 2d signals, transfer functions 22 6
  • 4.57143
4.6 | 8 ratings
Comments and Ratings on Harald E.'s Files View all
Updated File Comment by Comments Rating
23 Apr 2008 How to use FFT2 How to apply the 2D FFT functions in Matlab Author: Harald E. Krogstad doganay, emine

28 Jan 2008 How to use FFT2 How to apply the 2D FFT functions in Matlab Author: Harald E. Krogstad Minchenya, Vitaly

I applied it as follows:

%****FFT Low Pass Filter****%
%Array dimensions
M = 1024;
N = 1024;
%Sampling intervals
dx = 1;
dy = 1;
%Characteristic wavelengths
KX0 = (mod(1/2 + (0:(M-1))/M , 1) - 1/2);
KX1 = KX0 * (2*pi/dx);
KY0 = (mod(1/2 + (0:(N-1))/N , 1) - 1/2);
KY1 = KY0 * (2*pi/dx);
[KX,KY] = meshgrid(KX1,KY1);
%Filter formulation
K0 = 0.16;
T = (KX.*KX + KY.*KY < K0^2);
%Filter Application
bwmofilt = ifft2(T.*fft2(bwmo));
imwrite(bwmofilt,'4.filtered.jpg');
%******END of FFT Low Pass Filter******%

28 Jan 2008 How to use FFT2 How to apply the 2D FFT functions in Matlab Author: Harald E. Krogstad Minchenya, Vitaly

Very helpful.

18 Jan 2008 How to use FFT2 How to apply the 2D FFT functions in Matlab Author: Harald E. Krogstad asdfasdf, asafd

29 Mar 2007 How to use FFT2 How to apply the 2D FFT functions in Matlab Author: Harald E. Krogstad CHOI, HYOJOON

good

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