rgb_=imread('china.jpg');
rouge=rgb_(:,:,1);
vert=rgb_(:,:,2);
bleu=rgb_(:,:,3);
aa=uint8(zeros(size(rgb_)));
[lin,col]=size(rgb_(:,:,1));
for i=1:lin
for j=1:col
if ((rouge(i,j)>95 && vert(i,j)>40 && bleu(i,j)>20)&& (abs(rouge(i,j)-vert(i,j))>15) &&(vert(i,j)<rouge(i,j)&&rouge(i,j)>bleu(i,j) ) )
aa(i,j,1)=rouge(i,j);
aa(i,j,2)=vert(i,j);
aa(i,j,3)=bleu(i,j);
end
end
end
imshow(aa);