Undefined function or variable 'segPic'.

My code is

din=imread('Pic1.jpg');

[rows, columns, numberOfColorBands] = size(din)

if numberOfColorBands > 1 din = din(:, :, 2); % Take green channel.

end

figure(1); imshow(din) figure(2); imhist(din)

BW = roicolor(din, 75, 255); figure(3), imshow(BW)

dout = double(din < 70);

grass = double(segPic == 0)*100; figure (3); imagesc(grass)

road = double(bwareaopen(segPic, 1000))*255; figure(4); imshow(road)

tree = + road; figure(3); imagesc(tree); axis image axis off

I am getting an error as,

Undefined function or variable 'segPic'.

Error in segmentation1 (line 24) grass = double(segPic == 0)*100;

[Geoff Hayes]

Vetri - the error message is telling you that you haven't defined the variable (or function) segPic before trying to use it. Your code seems to suggest that this is a matrix and that you wish to find all zeros in it. What are you assuming that segPic is (segmented picture?) and what are you attempting?