Matlab

imnoise on derivatives of an image
Hi, I have the following situation: - read an image (0..255 range); cast it to double precision; - compute its gradient (dIdx and dIdy, which obviously will contain both positive and negative entries) - try to add noise to the derivatives using imnoise function; The result of imnoise is scaled from 0 to 1. My... 13 Mar 2010 17:34

matlab jomework help...
This assignment is based on the optical communication example in Lecture 14 notes. If the laser is on, the detector output is a Poisson random variable with an expected value of 1,300. Otherwise, if the laser is off, the detector output is a Poisson random variable with an expected value of 800 photons. The receiver de... 13 Mar 2010 05:22

image
"sukhwinder " <sukhisembhi(a)yahoo.co.in> wrote in message <hnf1ct$s5e$1(a)fred.mathworks.com>... i am working on medical image enhancement using PSO . i donot know how to initialize the particle, position and velocity and write program . pl z help me ... 13 Mar 2010 07:31

program
i'am looking for program of ASK(amplitude shift key) using MATLAB . kindly help me. ... 13 Mar 2010 03:13

svd and variance
Apologies if this is a simple question, when we compute svd > [U, S, V] = svd(data), how to get the variance explained or singular covariance fraction from that results? ysf ... 13 Mar 2010 02:08

Image
I applied it on the signal now i want to apply on the image Suppose i have taken a image Having x on x, and t on y..... So i it will be a matrix. Now i want to decimate that image by 10%.........after decimation i want to apply FFT by putting zeros in place of decimation get the spectrum.. I want to apply it... 13 Mar 2010 01:03

Nyquist diagram for MATLAB GUI
I need a right code to show the nyquist diagram in the GUI given that the numerator and denominator of a transfer function is given The code I made % --- Executes on button press in pushbutton11. function pushbutton11_Callback(hObject, eventdata, handles) % hObject handle to pushbutton11 (see GCBO) % eventd... 12 Mar 2010 23:58

PSO for image enhancement
On Mar 12, 10:39 pm, "sukhwinder " <sukhisem...(a)yahoo.co.in> wrote: i am working on medical image enhancement using PSO . i donot know how to initialize the particle, position and velocity  and write program . pl z help me ----------------------------------------------------------------------- What kind of help do... 12 Mar 2010 23:58

PSO for image enhancement
i am working on medical image enhancement using PSO . i donot know how to initialize the particle, position and velocity and write program . pl z help me ... 13 Mar 2010 03:13

Optimization with a variable of very huge dimension.
Hi all, In my class project, I need to develop a classifier based on Logistic Regression to classify ham and spam emails. The request is that I use conjugate gradient algorithm to estimate a parameter vector theta (that is the weights of words in emails). The problem is that dimension of the vector theta is e... 12 Mar 2010 22:53