Matlab

image normalization
hi all how to normalize an image from 0 to 1 ? what i'm doing is as foloows : BG_img = imread('BG.tiff'); BGfft = fft2(BG_img); noise_img = BGfft * (conj(BGfft)); and the to normalize the output is : C = mat2gray(noise_img, [0 1]); is this right ? ... 21 Jun 2010 06:57

digital watermarking using fractional fourier transform
Hi , I've a project on digital watermarking using fractional fourier transform m nt able to get through it.i have written the code but after watermarking iam not getting the original image.here's my code A = imread('cameraman.tif'); T = dFRT(256,0.1); F = T*double(A)*T; figure,imshow(mat2gray(log(1+abs(F)))); P=... 12 Jun 2010 18:11

help to read data from Agilent DS06054a
I am trying to use the instrument control toolbox in Simulink (query instrument) to read continues data from DS06054a Agilent oscilloscope via USB. Please let me know if this is the write way to acquire data. Thanks Faisal ... 17 Jun 2010 14:31

Grouping the Nonzero Elements of an NxNxN Matrix
Hello, I have an NxNxN matrix the elements of which is either zero or one. For example in the 2x2x2 case, N(1,1,1)=1 N(1,1,2)=0 N(1,2,1)=0 N(1,2,2)=0 N(2,1,1)=0 N(2,1,2)=0 N(2,2,1)=0 N(2,2,2)=1 I am trying to group the neighbouring elements which are '1'. For the matrix above N(1,1,1) and N(2,2,2)... 12 Jun 2010 12:39

Cartesian - cylindrical transformations
hi, Recently i have problem in plotting a function. here it is E_i = (E_x, E_y,E_z), components of a vector in Cartesian. Each of the component is a function of cylindrical coordinates, ie.,E_i is 3-d matrx . I want to plot these components in Cartesian planes - XZ,YZ. I could get XY from pol2cart command. Can any o... 12 Jun 2010 15:58

how to find connectivity matrix
hi I wish to define an unstructured grid in a VTK file, for which I need to give all the points in my grid (fine) and the connectivity - i.e. for each cell I need to give the indices of the points which make up said cell. (ugh). I know triangulations and such will give indices for each tetrahedron, but I wish to defi... 16 Jun 2010 07:45

Character form
Hi, I'm trying to create a loop that will generate ma variable names automatically. Here's my code : (Titres means Titles) Titres2 = num2cell(zeros(1+p*size(A3,2),3)); Titres2{1,1} = 'const'; Titres2{1,2} = 'const'; Titres2{1,3} = 'const'; Titres = Data.textdata(7,2:4); for i=1:size(A3,2) for j=1... 14 Jun 2010 11:45

Urgent- Unicode to Chinese to English conversion of matlab
> decode it first into Chinese and then to English. Have you tried to open (supposedly) the .m file using a text editor rather than ML Editor? (If you are under Windows, right click on the file, Open with...) Would it be possible to convert then the .txt from Chinese to Unicode? There are some on-line conversion too... 12 Jun 2010 11:31

Urgent- Unicode to Chinese to English conversion of matlabcomments.
Please find below, some of the comments in a matlab program which is actually in Chinese. but since it doesnt support doesnt show correctly. I want to covert it back and make it readable in english.. so i think i need to decode it first into Chinese and then to English. Please help me find a solution. Urgent samp... 12 Jun 2010 10:25

real time analog input and output
http://spikehound.sourceforge.net/ This matlab program will route the data from any input source (daq toolbox) to the computer speakers using the "listen" button. It was originally designed so that you could capture neural spikes on a national instruments board (or otherwise) and listen to them on your speakers. ... 12 Jun 2010 08:15