MATLAB: I want to apply lazy snapping algorithm but I face some error and can’nt understand how to remove it .. anyone can tell me how to solve it .. code is given below (ERROR is :Undefined function or variable ‘lazysnapping’.)

Question

RGB = imread('peppers.png');

figure;

imshow(RGB)

h1 = impoly(gca,[34,298;114,140;195,135;259,200;392,205;467,283;483,104],'Closed',false);

foresub = getPosition(h1);

foregroundInd = sub2ind(size(RGB),foresub(:,2),foresub(:,1));

figure;

imshow(RGB)

h2 = impoly(gca,[130,52;170,32],'Closed',false);

backsub = getPosition(h2);

backgroundInd = sub2ind(size(RGB),backsub(:,2),backsub(:,1));

L = superpixels(RGB,500);

BW = lazysnapping(RGB,L,foregroundInd,backgroundInd);

maskedImage = RGB;

maskedImage(repmat(~BW,[1 1 3])) = 0;

figure;

imshow(maskedImage)

Answer 1

According to its documentation page the lazysnapping function was introduced in Image Processing Toolbox in release R2017a. I suspect you're using an earlier release than that. To use this function you will need to upgrade to release R2017a or later with Image Processing Toolbox.