Matlab

DFT
Hello everyone, I am doing a DSP project.I want to know how I can go about with this: I have a square wave.I should use the DFT eqns 2 and 3 to find a0,am,bm.Also,using eqn 1 I should reconstruct the original signal.Then,I have to plot the original and reconstructed signal.These eqns are recursive are'nt they?We a... 8 Dec 2009 10:48

fill image (imfill)
Hi, I want to fill certain parts of a black and white bitmap as shown in the pdf at this location: http://rapidshare.com/files/318038978/images.pdf.html Referring to this file, I am using imfill with the below code but that fills the entire circle. image=imread('imagefile24.bmp') image=1-(im2bw(image)) image_fi... 8 Dec 2009 10:48

imresize function
Hi, (new in this forum). I would like to ask about the imresize function. It uses an antiliasing filter for interpolation/decimation, but how is this filter selected? suppose i want to turn gray-scale images of different heights (eg. 45 or 23 pixels) to the corresponding ones with 30 pixles height. probab... 8 Dec 2009 11:54

error saving desktop configuration
Andrew Casey <andycasey(a)gmail.com> wrote in message <8d07eeb6-95da-4f87-9775-96582af8a938(a)s33g2000pri.googlegroups.com>... On May 5, 12:39 am, "Naor Movshovitz" <laz...(a)yahoo.com> wrote: Occasionally I get a message saying the desktop configuration did not save correctly. (This is not a red error mes... 8 Dec 2009 09:41

Add scrollbar to figure with subplots
"Ted " <ted_banson(a)hotmail.com> wrote in message <hd5e96$a6t$1(a)fred.mathworks.com>... Ok, I managed to solve it. End of thread. Hi, Ted... How you solve it? can you share it to me!? I have same problem. ... 8 Dec 2009 09:41

Convert from ED50 to WGS84 positions
Dear groupmemers, I need to convert ED50 positions to WGS84. Has anyone written a matlab function that can do that? Nils Olav ... 12 Dec 2009 18:55

2-D Edge curvature calculation
Hi there, thanks for reading. I was given a 2-D video with about 1000 frames with the light intensity of a chemical wave that has a closed-shape form and propagates. I did obtain a decent contour of the wave by doing a threshold and a gaussian filter. This resulted on having the coordinates of the wave edge (Xe,Ye). ... 8 Dec 2009 02:08

when exact differential equation solvers go bad!
Three exact differential equations ... with simple by-hand solutions. dsolve('2*x*y + (x^2 + y^2)*Dy = 0','x') dsolve('1 + log(x) + 2*x*log(y) + (x^2/y - 2*y)*Dy = 0','x') dsolve('Dy + (6*x^2*y + y^3 + 5*x^4)/(2*x^3 + 3*x*y^2 + 12*y^3)=0','x') Matlab gives quite nutty answers ... one including the Wright omega ... 28 Dec 2009 08:33

Matched Filter design with blood vessel detection
Hi, I got a project which extracting vessels from retinal image. The filter must be in frequency domain. I am having a problem with my filter algorithm. On my research, usually gaussian filter method modified for matched filter. Then use imrotate 90 degree and use sigma 1 and 3. After all sigma1-sigma3 will give final... 7 Dec 2009 14:00

cognitive radio
Plz can you send me matlab code about Radio Cognitive? Thanks ... 7 Dec 2009 10:40