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

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);

Answer 1

[Rik]

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.

[Fariz]

can you show me the code to reduce it to 1 color channel?

[Rik]

This is likely what you need:

ImageFile=ImageFile(:,:,1);

You can verify this is what you need with imshow.

[Fariz]

ok thank you