pritha Das

jadavpur

Active since 2013

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if i break a RGB image into lab image and then for each channel if i have done haftoning using BGA algorithm and filter and minimized its error.then i how to combine 3 channel to see the whole image to compare it with its original image????
i got halftone channel image say I_a_bl_ht for l channel I_b_bl_ht for a channel and I_c_bl_ht for b channel so how can i co...

9 years ago | 0 answers | 0

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I WANT TO PASS A INFORMATION OF A BLOCK OF A IMAGE THROUGH binary genetic algorithm and decide it fitness function.what changes i need to make for it.
rRGB1=RGB(:,:,1); gRGB1=RGB(:,:,2); bRGB1=RGB(:,:,3); rRGB=double(rRGB1/255); gRGB=double(gRGB1/25...

9 years ago | 0 answers | 0

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i am trying to divide a RGB image into 4*4 block.below program is not running.
the program is function pd_repmt=repmat(n,d,k) img=imread('F:\Images.jpg', 'jpg'); s=size(img); %blo...

9 years ago | 2 answers | 0

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Question

to creative a low pass filter for The chrominance spatial frequency response MTF i am having some problem...i am giving the code below...but i m getting some ripples.....what is the solution???
function tintin=tintin(s,d) [f1,f2] = freqspace(s,'meshgrid'); Hd = ones(size(f1)); r = sqrt(f1.^2 + f2.^2); % th=atan(f2./f...

10 years ago | 0 answers | 0

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i want to convert srgb to CIElab color space without using srg2lab and through x,y,z values. so what will be reference white here???
RGB(1, 1, :) = [255 255 255]; rRGB=RGB(:,:,1); gRGB=RGB(:,:,2); bRGB=RGB(:,:,3); M = [0.4124564 0.3575761 0.1804375 ...

10 years ago | 0 answers | 0

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i want to convert an image from rgb to xyz and want to get the values of x and y and z separately. so i am having a problem. how can i encounter the problem?????
RGB = [255; 255; 255 ]; rRGB=RGB(:,:,1); gRGB=(RGB(:,:,2)./RGB(2)) * 100; bRGB=RGB(:,:,3); M = [0.4124564 0.357576...

10 years ago | 1 answer | 0

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Question

How to convert an image from rgb to l*a*b color space without using any function???
i want to change rgb image into l*a*b color space without using makecform() and applycform() functions.....how can it be done???...

11 years ago | 2 answers | 0

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How to convert an image from rgb to lab by pixel by pixel matrix???
like i have image...i have to read it in matlab...then if i want to change the rgb values of the image to lab values...then what...

11 years ago | 2 answers | 0

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