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hi, I am trying to apply FFT2 to a colour image (RGB). For this i am thinking of seperating the given image into its monochrome components and process each one seperately. Is this idea right? If so do we have any matlab function to decompose the given RGB ... ? And moreover after applying FFT to each monochrome component i dont have any idea of hoe to recombine the three components back in the spatial domain. waiting for someone to help, regds, rukmani. |
colour image processing in matlab
Started by ●March 9, 2005
Reply by ●March 9, 20052005-03-09
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Rukmani, Out of little of what I remember of playing with color image, I think once you read the image in matlab it is in stored in a 3 dimensional matrix. Where each matrix coresponds to R G and B component. This may be true only for a particular format though. I may be wrong. What format is ur image in? How is it stored in matlab. I mean what are the dimension of variable used to store that image. If you can separate 3 components than definately you can recombine and get color image in spatial domain. Hope this helps Tarang On Wed, 09 Mar 2005 10:08:14 -0500, <> wrote: > > > hi, > > I am trying to apply FFT2 to a colour image (RGB). For this i am thinking of > seperating the given image into its monochrome components and process each > one seperately. Is this idea right? If so do we have any matlab function to > decompose the given RGB ... ? And moreover after applying FFT to each > monochrome component i dont have any idea of hoe to recombine the three > components back in the spatial domain. > waiting for someone to help, > regds, > rukmani. > > > To |
Reply by ●March 10, 20052005-03-10
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Hi Rukmani, You are in the right track. You have to decompose the RBG into separate R-, G- and B- colour components and take 2-D FFT separately. x = imread('file.jpg'); % Decompose to separate colour components xr = x(:,:,1); xg = x(:,:,2); xb = x(:,:,3); % Take 2-D FFT on xr, xg, xb ... ... % To reconstruct % Take 2-D IFFT ... ... % To recombine in time-domain y(:,:,1) = xr; y(:,:,2) = xg; y(:,:,3) = xb; bimol wrote: > > >hi, > >I am trying to apply FFT2 to a colour image (RGB). For this i am thinking of seperating the given image into its monochrome components and process each one seperately. Is this idea right? If so do we have any matlab function to decompose the given RGB ... ? And moreover after applying FFT to each monochrome component i dont have any idea of hoe to recombine the three components back in the spatial domain. >waiting for someone to help, >regds, >rukmani. > > -- Waikhom Bimolchand Singh DSP and Micro Division STMicroelectronics, India __________________________________________________________________ Switch to Netscape Internet Service. As low as $9.95 a month -- Sign up today at http://isp.netscape.com/register Netscape. Just the Net You Need. New! Netscape Toolbar for Internet Explorer Search from anywhere on the Web and block those annoying pop-ups. Download now at http://channels.netscape.com/ns/search/install.jsp |
