Write a matlab code for following : Load image ‘Balloon.tif’ into Matlab . Devel

Question

Write a matlab code for following :

Load image ‘Balloon.tif’ into Matlab

. Develop a function to mark all pixels in green with 1 and 0 for the rest. Display the result image

Convert it into a grayscale image, denoted with ‘img1’

Create a copy of the clean grayscale image, denoted with ‘img2’, in the memory and add salt and pepper noise to it using imnoise

Remove salt and pepper noise using function medfilt2 and display the clean (img1) and denoised image side by side (using subplot function)

Create a copy of the clean grayscale image, denoted with ‘img3’, in the memory and add Gaussian noise using imnoise. Remove Gaussian noise using imgaussfilt

Enhance the denoised img3 to recover the fine edges

Image link : http://tinypic.com/r/289c2t1/9

Explanation / Answer

a.

in = imread('imin.tif');
inSize = size(in);
out = zeros (inSize(1),inSize(2));
for i=1:inSize(1)
    for j=1:inSize(2)
        if in(i,j,2)>0 && in(i,j,1)==0 && in(i,j,3)==0
            out(i,j) = 1;
        end
    end
end

imShow(out); %part a

img1 = rgb2gray(in);
img2 = imnoise(img1,'salt & pepper',0.08); %part b
k=medfilt2(img2);

figure
subplot(1,2,1);
imshow(img1);

subplot(1,2,2);
imshow(k); %part c

img3 = imnoise(img1,'gaussian',0,0.01);
x = imgaussfilt(img3); %part d
y = imsharpen(x); %part e

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