Trying to extract road from an image but got the error- "Integers can only be combined with integers of the same class, or scalar doubles."

[f,p]= uigetfile('.jpg'); I=imread([p,f]); figure, imshow(I);

if ndims(I)==3 I1=rgb2gray(I); else I1=double(I); end k=3; [mu,mask]=kmeans(I1,k); figure, imshow(mask,[]); title('unsuper');

%I2=mask;

figure,imshow(I3); title('morphpo');

I4=medfilt2(I3,[5,5]); figure,imshow(I4);

levelset_method(I4,I1);

hs=14; hr=12; m=30; me_seg= meseg(I1,hs,hr,m); S1=imcomplement(im2bw(me_seg));

se1=strel('disk',3); Iout=imerode(S1,se1); figure, imshow(I) hold on; contour(Iout,[0,0],'r')

[Image Analyst]

http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

[Jan]

Please post the complete error message. Most of all the part which explains in which line the error occurs is important, such that we do not have to spend time for guessing this detail.

Answer 1

[Image Analyst]

You might try this

I1 = double(rgb2gray(I));