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Recent content by abhigopal

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    Looking for some documents about BCH codes

    Hi all I need information on BCH codes, right from basics. Any good ebook, site? or can anybody give me some basics to start off with.
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    matlab image proc doubt

    Hi all I have a doubt! I read an image using imread and this was read as square matrix of class unit8(unsigned 8 bit). But some of the functions i used were not compatible with uint8 and hence I needed to convert everything into double form. I did this, finished my work and now want to view...
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    What does maximum lag signify? (Matlab)

    Hi all I am using the XCORR function in MATLAB to compute cross correlation between two arrays ( vectors). however, I am getting the following error. Wht do I do. ??? Error using ==> xcorr Maximum lag must be an integer. What does Max lag signify? I tried using MATLAB help but was not...
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    Unit Impulse and Unit Sample Functions in Matlab

    unit impulse matlab hi for the book, Sanjit K mitra is good for DSP learning using a computer based approach. Vinay Ingle and proakis's DSP using MATLAB is good as well. anyway, matlab has a pretty comprehensive help section as well. you should be able to manage good luck
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    Matlab image processing doubt

    Hi, I have an image matrix. I want to convert all the pixel values to binary values for processing. How do i do this?? Is there some kind of quantization format available?? Thanks Abhi
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    Matlab doubt about imread function

    matlab doubt!!! Ok, Echo47 My input image is lenna.gif which is a 2565 X 256 matrix. At first, I did not realise tht it would cause problems. This is in the formed of Unsigned 8 bit integer (Uint8). Later, I added tht second line and it seemed to work fine. I do some operations and end up with...
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    Matlab doubt about imread function

    Hi, I used the imread function to read an image matrix of size 256 X 256. The image matrix was easily displayed. But when I wanted to perform some operations to this image, it gave me an error saying that the data type was a uint8 - unsigned 8 bit integer. So i converted everything to double...
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    Can linear convolution technique be applied to discrete linear shift variant systems?

    Hi, I was wondering whether the linear convolution technique can be applietd to discrete linear shift variant systems?? From what I have understood, if the signal is time /shift varying, then for applying convolution, I might have to use circular convolution as a result of foldback. Anyone has...
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    cross correlation and auto-correlation question

    Hi all, I have a question! I have a vector( array of elements) and I need to compute the auto-correlation matrix for this. How do I do it in Matlab. This matrix needs to be toeplitz and symmetrical. Also on the same lines, How do i perform cross correlation between 2 sets of elements (arrays...
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    auto correlation and cross correlation values

    Hi all, I have a question! I have a vector( array of elements) and I need to compute the auto-correlation matrix for this. How do I do it in Matlab. This matrix needs to be toeplitz and symmetrical. Also on the same lines, How do i perform cross correlation between 2 sets of elements (arrays...
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    question on signal sampling in matlab

    signal sampling in matlab Hi all I need to sample a signal that is actually a generated by adding some sine waves together, say abt 5 of them all having different frequencies. for generating these waves, i did the following t=0:0.1:1 % this the samples tht need to be generated for sine wave...
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    matlab image processing question - very basic one

    Hi all I am faced with a very basic problem . I have some images which are all gray scale ones (black and white, no color ones). I use MATLAB 7.0 to read these images and express these images in matrix format When i use imread('filename'), i get a matrix which is of order M x N. However, I...
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    Correlation Coefficient problem

    Flatulent, No, the real and imaginary parts are not lying between 1 and -1. One of them is greater than 1 at times. And if the complex number I got is actually the coefficient, then how would I know the extent upto which the two arrays are correlated. And, this does not occur in all cases...
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    Correlation Coefficient problem

    related:www.rocksolidimages.com/pdf/semblance.pdf Hi all My problem is kinda weird. I have two arrays of numbers and I want a pairwise correlation between these two numbers. I use MATLAB 7.0's inbuilt function namely corr.m .. My problem is tht one of these arrays has only real numbers and the...
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    Looking for Matlab books related to filter design

    Matlab Hi MK28 For filter design techniques, i used Digital Signal processing using matlab by John Proakis and Vinay K Ingle. You could search around in the forum and see if you can find it.. Also its a good book if u need to just learn Matlab as well all the best abhi
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