问如何在matlab中实现基于颜色的聚类精确排序

EN

function segmented_img = leaf_segmentation( original_img, nclusters )

original_img = im2double(original_img);
G=fspecial('gaussian',[200 250],1);
smoothed_img =imfilter(original_img,G,'same');

conversionform = makecform('srgb2lab');
lab_img = applycform(smoothed_img,conversionform);

ab_img = double(lab_img(:,:,2:3));
nrows = size(ab_img,1);
ncols = size(ab_img,2);
ab_img = reshape(ab_img,nrows*ncols,2);

cluster_idx =   
kmeans(ab_img,nclusters,'distance','sqEuclidean','Replicates',3);
cluster_img = reshape(cluster_idx,nrows,ncols);
segmented_img = cell(1,nclusters);
for k = 1:nclusters
   segmented_img{k} = bsxfun( @times, original_img, cluster_img == k );
end


end


segmented = leaf_segmentation( imread('input image'), 3 );

figure,imshow(segmented{1}), title('Cluster 1');
figure, imshow(segmented{2}), title('Cluster 2');
figure, imshow(segmented{3}), title('Cluster 3');