# Amith Kamath

### U Minnesota

Professional Interests: Image Processing, Computational complexity and algorithms

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**Content Feed**

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...

ungefär 9 år 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...

mer än 9 år 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> ...

mer än 9 år 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...

mer än 9 år 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...

mer än 9 år 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>

mer än 9 år 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...

mer än 9 år 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...

mer än 9 år ago | 0

Solved

Determine if input is odd

Given the input n, return true if n is odd or false if n is even.

mer än 9 år ago

Solved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

mer än 9 år ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

mer än 9 år ago

Solved

Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

mer än 9 år ago

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...

nästan 10 år 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>...

nästan 10 år 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(...

nästan 10 år 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...

nästan 10 år ago | 0

| accepted

Using Matlab for Iphone or Ipad

<http://www.mathworks.com/matlabcentral/answers/12036#comment_26682> at <http://www.mathworks.com/matlabcentral/answers/12036-ho...

nästan 10 år 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 ...

nästan 10 år 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...

nästan 10 år 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...

nästan 10 år ago | 0

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Using fgetl() to read lines

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

nästan 10 år ago | 0

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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);

nästan 10 år 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...

nästan 10 år 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. ...

nästan 10 år 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...

nästan 10 år 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 ...

nästan 10 år 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....

nästan 10 år 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...

nästan 10 år 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....

nästan 10 år ago | 0