Error using radon Expected input number 1, I, to be two-dimensional.

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Fariz 2019-11-25

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https://ww2.mathworks.cn/matlabcentral/answers/492989-error-using-radon-expected-input-number-1-i-to-be-two-dimensional

评论： Fariz 2019-11-25

采纳的回答： Rik

在 MATLAB Online 中打开

my code is

ImageFile = imread('ct_brain2.jpg');
fotob = ImageFile; %the class is uint8
proy = 100;
cacah = 180/proy;
theta = 0:cacah:180-cacah;
[R,xp] = radon(fotob,theta);
citra = iradon(R,cacah);
imshow(citra)

I am getting an error as,

Error using radon
Expected input number 1, I, to be
two-dimensional.
Error in radon (line 63)
validateattributes(I,{'numeric','logical'},{'2d','nonsparse'},mfilename,'I',1);
Error in CT_test (line 57)
[R,xp] = radon(fotob,theta);

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采纳的回答

Rik 2019-11-25

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/492989-error-using-radon-expected-input-number-1-i-to-be-two-dimensional#answer_403157

Your jpg file is probably an RGB image (even if it doesn't look like a color image). That makes it a 3D array. You need to determine a way to reduce it to 1 color channel. In general for grayscale images you can simply select the first color channel.