Matlab

Wavelets for Images - Help!
In a project I am working on I need to map an image to a feature space, so as to reduce the dimensions. I have to do it by "selected the 3000 strongest wavelet coefficients of the image at level 3" (assume 'db1' wavelet). Can anyone help me with how to go about it? Once processing is done in the feature space, how sh... 8 May 2010 07:55

32bit vs. 64bit, MEX, and OS X 10.6
I have MATLAB 2010a on my OS X 10.6 macbook, and it's run fine so far. Recently, I tried to use MEX with some older C code I had, which previously had worked fine. When trying to compile them I get the following warnings: ld: warning: in /Developer/SDKs/MacOSX10.5.sdk/usr/local/lib/ libgsl.dylib, file was buil... 10 May 2010 09:51

hough
I have recently remove from my Vista laptop Matlab 7 and install Matlab R2007a. I want to apply hough transform to an image but it seems imposible as not even including in Matlab example for hough function works. (same result for grayscale image!!!) RGB = imread('gantrycrane.png'); I = rgb2gray(RGB); % convert to... 10 May 2010 01:13

Mixed Integer Nonlinear Optimization
Hello, I have a non-linear optimization problem as the following: Find x1, x2, x3,.......xK that maximize the function f(x1, x2, x3,.......xK) where K is unknown, subject to the constraint x1+x2+x3+........xK =1 (actually they represent probabilities), and other constraints. I also have the information that: ... 8 May 2010 03:39

Extracting a surface in a binary volume
Hello, I have a simple problem which I am hoping to find a simple solution for. I have a binary volume where elements that represent the object are 1 and the background is 0. I would like to extract the TOP surface of the object. For example, if the object was a solid sphere, I would want to extract the surface o... 9 May 2010 16:30

remove black bar outline in bar3
Wow - sure is easy when you know the write properties to change!! Thanks for the quick and accurate response. ... 7 May 2010 16:44

Solving Matrix equation with contraints
Hi: I am trying to solve AX=B; where X,A, B are n by n matrices; subject to the constraints: a) x(i,i)=0 (ie all the diagonal element of X matrix shd be 0) b) each of the row sum of X should be 1, ie, sum[x(i,j)]=1 when summing over all the columns for each row i. c) each x(i,j)>=0; Can any of you please help... 12 May 2010 13:36

HELP PLEASE!!
Hello Everyone!! I have biplane cerebral angiograms. I have got the two aneurysm view aligned in 3D and have formed a volume consisting of elliptical cross sections. Now I need to get a smooth surface from those elliptical cross sections stacked together. Can someone help me out? Do we have some command in Matlab ... 7 May 2010 16:44

help me
hi i am subhashini . I am doing masters in engineering. i want this paper to proceed with my project work.could any one help and mail me the paper to k.subha.r(a)gmail.com 2009 International Conference on Multimedia Information Networking and Security AODVsec: A Multipath Routing Protocol in Ad-hoc Networks for I... 8 May 2010 13:24

Removing rows containing all zeros in a matrix
Hi All, I have a matrix containing 1's and 0's. I want to remove the rows that contain all 0's. Is there any matlab function that can do this. Can anybody help me in this. Thanks Rahul Singhal ... 7 May 2010 15:37