how to correlation plots from image

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nune pratyusha
nune pratyusha 2022-4-5
回答： nune pratyusha 2022-4-12
I = imread('Figure_1.png');
J = medfilt2(I);
R = corr2(I,J)
it showing error like
Error using medfilt2
Expected input number 1, A, to be two-dimensional.
Error in medfilt2>parse_inputs (line 107)
validateattributes(a, ...
Error in medfilt2 (line 49)
[a, mn, padopt] = parse_inputs(args{:});
Error in untitled15 (line 6)
J = medfilt2(I);
>>

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回答（2 个）

Tala
Tala 2022-4-5
I needs to be grayscale image. you want to convert your image to grayscale before passing ut to your filter. use imgtype = getImageType(I) and then convert it to grayscale
nune pratyusha
nune pratyusha 2022-4-12
but i am getting different hystogram plots using below code
A = imread('Figure11(b).png');
Ref = imread('Figure(b).png');
montage({A,Ref})
figure
displayHistogramChannels(A,Ref)
my output is comes like in untitled.fig
how to get histogram plots like Untitled.png

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