Community Profile

# Amith Kamath

### U Minnesota

Active since 2011

Professional Interests: Image Processing, Computational complexity and algorithms

All

#### Content Feed

View by

What is the function to plot a rotating 3-D ellipsoid
function [] = visualizeDTrot(C,M,speed,Dir,time) %% C: the covariance matrix. %% Dir: direction of the estimate, to be p...

fast 9 Jahre ago | 1

| accepted

Hi i need help in file conversion .txt to mat file
Although this may not be the best way to do this, but you can use IMPORTDATA to import all the data from the '.txt' file as a st...

etwa 9 Jahre ago | 0

How to change colorbar's color (in some particular value interval)?
You can manually change the colormap, using COLORMAPEDITOR: <http://www.mathworks.com/help/matlab/ref/colormapeditor.html> ...

etwa 9 Jahre ago | 0

how to draw a temperature distribution on (x,y,z)?
<http://www.mathworks.com/help/matlab/visualize/representing-a-matrix-as-a-surface.html> should help. The image you have att...

etwa 9 Jahre ago | 0

how i can implement lowpass filter on image using matlab
I am assuming you need to smooth (low pass) an image. These two functions are what you need to use: <http://www.mathworks.com...

etwa 9 Jahre ago | 0

How do I obtain video (.avi) from a webcam (in real time) and store the video frames somewhere for further processing?
This will be instructive: <http://www.mathworks.com/help/imaq/examples/logging-data-to-disk.html?prodcode=IA&language=en>

etwa 9 Jahre ago | 0

| accepted

Confusion with adding to cell array
This should work: a = {[0 0], [0 0]} b = [1 2 3 4] a{1} = b(1:2) %choose the first two elements from b and assign to fir...

etwa 9 Jahre ago | 0

how to plot scattered points on 2D graph
Does <http://www.mathworks.com/help/matlab/ref/scatter.html> work? I am assuming your data is a collection of (x,y) pairs, and y...

etwa 9 Jahre ago | 0

how to find area,eccentricity,mean median ,mode ,variance of a white blood cell
<http://www.mathworks.com/matlabcentral/fileexchange/25157-image-segmentation-tutorial-blobsdemo> would be a good place to start...

mehr als 9 Jahre ago | 0

Display gray color only from grayscale image
For most tasks of analysing pixel values and thresholding, I've found <http://www.mathworks.com/matlabcentral/fileexchange/6770>...

mehr als 9 Jahre ago | 0

Displaying Images after feature extraction
If you have four images in I, J, K and L, you could do this, figure subplot(2,2,1); imshow(I) subplot(2,2,2); imshow(...

mehr als 9 Jahre ago | 0

What are the advantages/disadvantages to using the ball compared to the disk structuring element?
<http://blogs.mathworks.com/steve/2006/10/23/nonflat-grayscale-dilation-and-erosion/> has some details about the non-flat struct...

mehr als 9 Jahre ago | 0

| accepted

Using Matlab for Iphone or Ipad

mehr als 9 Jahre ago | 1

| accepted

Delete rows in a matrix that contain ONLY a negative number
I'm quite positive that this does the trick. There would probably be more optimal ways to do it! X = 100.*rand(12,5); %for ...

mehr als 9 Jahre ago | 1

histograms of crossing count
Thanks for the interesting question! I'm guessing you're trying something like this. The I = (rand(500,500) >= 0.5); %i...

mehr als 9 Jahre ago | 0

how to load a picture in Matlab? can a video is uploaded in Matlab ?
<http://www.mathworks.com/products/imaq/examples.html> and <http://www.mathworks.com/help/imaq/examples/acquiring-a-single-image...

mehr als 9 Jahre ago | 0

| accepted

<http://www.mathworks.com/matlabcentral/newsreader/view_thread/297814> may be of some help. Unless you are constrained to using ...

mehr als 9 Jahre ago | 0

| accepted

I have a matrix, there are zeros values in that and i just want to remove the zero values from the array
if A is the array in question, you could do: A = A(A ~= 0);

mehr als 9 Jahre ago | 1

| accepted

Which toolboxes are needed for object detection from video over MATLAB 2009 platform?
You may want to look at: <http://www.mathworks.com/products/computer-vision/index.html> (this is not available for 2009 thoug...

mehr als 9 Jahre ago | 0

| accepted

Measuring indentation in an object
<http://blogs.mathworks.com/steve/2011/10/04/binary-image-convex-hull-algorithm-notes/> and the convex hull concept would help. ...

mehr als 9 Jahre ago | 0

I wanna replacing 2nd and 3rd column to each other. How can I write a command?
Assuming I understand the question right, here is an example of how it could be done: x = magic(5); % a random matrix fo...

mehr als 9 Jahre ago | 0

Mesh for 3D plot
Going from the error, it seems that you are trying to use mesh for a 1D array (Z in your case). Mesh expects the 'Z' to be a 2D ...

mehr als 9 Jahre ago | 0

background noise and nearst point
For either case, I would imagine you will need a mask for the brain regions. This can be done either manually using <http://www....

mehr als 9 Jahre ago | 0

convert 3d matrix to dicom image
I suppose for the time being, this happens to be the best available solution: <http://www.mathworks.com/matlabcentral/fileexch...

mehr als 9 Jahre ago | 0

what is the code to apply filters (lowpass and highpass) for signals read?
Assuming you have the Signal Processing Toolbox installed, you could use the FDA Tool to specify the parameters for your filter....

mehr als 9 Jahre ago | 0

Printing GUI figures
<http://www.mathworks.com/help/techdoc/ref/print.html> may help, although I've not tried it myself yet!

mehr als 10 Jahre ago | 0

NaN in deconvolution
Since your data has zeros in them, deconvolution may return NaNs because you are dividing by zeros. What you could do is either ...

mehr als 10 Jahre ago | 1

| accepted

showing the error out of memory
How to avoid out-of-memory cases: <http://www.mathworks.com/support/tech-notes/1100/1107.html>

mehr als 10 Jahre ago | 0

| accepted

clarification of the use 'switch case'
from <http://www.mathworks.com/help/techdoc/ref/switch.html>, In MATLAB switch blocks, only the first matching case executes...

mehr als 10 Jahre ago | 0

<http://www.mathworks.com/support/solutions/attachment.html?resid=1-13ZSQN&solution=1-13ZSPM> may be of help, assuming you have ...

mehr als 10 Jahre ago | 0

| accepted