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%read an image in matrix I I=imread("peppers.png"); %read an image in matrix m,n,c [m,n,c]=size(I); %creating zero matrix of size m x n J=zeros(m , n ); J1=zeros(m , n ); %initalizing the values in the zero matrix J and J1 for i=1:m for j=1:n J(i,j)=(I(i,j,1)+I(i,j,2)+I(i,j,3))/3; J1(i,j)=(0.299*I(i,j,1)+0.587*I(i,j,2)+0.114*I(i,j,3))/3; end; end; K=rgbzgray(I); %showing the images by using subplot figure; subplot(2,2,1); imshow(I); title("original"); subplot(2,2,2); imshow(J,[]); title("gray scale image using avrage method"); subplot(2,2,3); imshow(J1,[]); title("gray scale image using weighted method");
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