How can I solve the following error of the code segment?

Question

Syed Zenith Rhyhan 2019-1-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/440432-how-can-i-solve-the-following-error-of-the-code-segment

评论： Syed Zenith Rhyhan 2019-1-19

% function main
clc;
clear all;
close all;
im = imread('3.jpg');
subplot(2,1,1),imshow(im);
subplot(2,1,2),imhist(im(:,:,1));
title('INPUT IMAGE HISTOGRAM');%figure,imhist(im(:,:,2)),title('blue');figure,imhist(im(:,:,3)),title('Green');
figure;
% j=);
I = imnoise(im,'salt & pepper',0.02);
subplot(1,2,1),imshow(I);
title('Noise adition and removal using median filter');
K = medfilt2(I);
subplot(1,2,2),imshow(K);
im = double(im);
s_img = size(im);
r = im(:,:,1);
g = im(:,:,1);
b = im(:,:,1);
% [c r] = meshgrid(1:size(i,1), 1:size(i,2));
data_vecs = [r(:) g(:) b(:)];
k= 4;
[ idx C ] = kmeansK( data_vecs, k );
% d = reshape(data_idxs, size(i,1), size(i,2));
% imagesc(d);
palette = round(C);
%Color Mapping
idx = uint8(idx);
outImg = zeros(s_img(1),s_img(2),3);
temp = reshape(idx, [s_img(1) s_img(2)]);
for i = 1 : 1 : s_img(1)
    for j = 1 : 1 : s_img(2)
        outImg(i,j,:) = palette(temp(i,j),:);
    end
end
cluster1 = zeros(size(r));
cluster2 = zeros(size(r));
cluster3 = zeros(size(r));
cluster4 = zeros(size(r));
figure;
cluster1(find(outImg(:,:,1)==palette(1,1))) = 1;
subplot(2,2,1), imshow(cluster1);
cluster2(find(outImg(:,:,1)==palette(2,1))) = 1;
subplot(2,2,2), imshow(cluster2);
cluster3(find(outImg(:,:,1)==palette(3,1))) = 1;
subplot(2,2,3), imshow(cluster3);
cluster4(find(outImg(:,:,1)==palette(4,1))) = 1;
subplot(2,2,4), imshow(cluster4);
cc = imerode(cluster4,[1 1]);
figure,imshow(imerode(cluster4,[1 1]));
title('eroded image');
[label_im, label_count] = bwlabel(cc,8); 
stats = regionprops(label_im, 'Centroid');
for i=1:label_count
    area(i) = stats(i).Centroid;
end
[maxval, maxid] = max(area);
label_im(label_im ~= maxid) = 0;
label_im(label_im == maxid) = 1;
figure,imshow(label_im);
title('tumour');
% outImg = uint8(outImg);
% imtool(outImg);
code_end = 1;

ERROR:

Subscripted assignment dimension mismatch.
Error in main (line 70)
    area(i) = stats(i).Centroid;

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Syed Zenith Rhyhan 2019-1-19

编辑：Syed Zenith Rhyhan 2019-1-19

Code_With_Preprocessing.zip

Sir,I extremly sorry for the upload of wrong matlab files.Here the corrected files which I will work.Please consider the mistake and resolve the follwing error occured

Error:

Subscripted assignment dimension mismatch.

Error in main (line 70)

area(i) = stats(i).Centroid;

Walter Roberson 2019-1-19

Centroid is a vector of at least 2 elements (it will have the same number of entries as ndims applied to the image.) You cannot store a vector into a scalar location area(i)

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Answer 1

Walter Roberson 2019-1-19

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/440432-how-can-i-solve-the-following-error-of-the-code-segment#answer_357093

The line of code with the error does not occur in the code you attached. Your current code calls upon Area, which does not exist in the field because your current code asks regionprops for Centroid.

Centroid is a vector of at least 2 elements (it will have the same number of entries as ndims applied to the image.) You cannot store a vector into a scalar location area(i)

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Walter Roberson 2019-1-19

在 MATLAB Online 中打开

area(i) = stats(i).Centroid(1) + 1i * stats(i).Centroid(2);

You are now able to store the two pieces of information into a single location, one coded into the real() of the location and the other coded into the imag() of the location.

Syed Zenith Rhyhan 2019-1-19