How do I draw the scatterplot of an RGB image?

Parveiz Lone

2019 8 3

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darova 2019-8-3

Yes, sorry. I'm just not a native english speaker

Image Analyst 2019-8-4

Parveiz, please explain in words what the two axes of your scatterplots represent.

What does n,m on the x axis represent?
What does n+1, m+1 on the y axis represent?
Why do both of your scatterplots have the same x and y labels? They are not the same scatterplots yet they have the same axis labels. Why?

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KALYAN ACHARJYA 2019-8-4

编辑：KALYAN ACHARJYA 2019-8-4

在 MATLAB Online 中打开

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image_test=rgb2gray(imread('2.png')); % Change the image
[rows colm]=size(image_test);
original_data=zeros(1,56512);
diag_data=zeros(1,56512);
hor_data=zeros(1,56512);
ver_data=zeros(1,56512);
l=1;
%ignoring boundary elements
for i=2:rows-1
    for j=2:colm-1
        original_data(l)=image_test(i,j);
        diag_data(l)=image_test(i+1,j+1);
        hor_data(l)=image_test(i,j+1);
        ver_data(l)=image_test(i+1,j);
        l=l+1;
    end
end
subplot(131),plot( original_data,diag_data,'b.','linewidth',2);
xlabel('n,m'), ylabel('n+1,m+1'),title('Diagonal');
subplot(132),plot( original_data,diag_data,'b.','linewidth',2);
xlabel('n,m'), ylabel('n,m+1'),title('Horizontal');
subplot(133),plot( original_data,diag_data,'b.','linewidth',2);
xlabel('n,m'), ylabel('n+1,m'),title('Vertical');