MATLAB: Why this error?

image overlay

plz tell me the reason for this error..i have read that "overlay" function works for images of type unit8..why it's not working then?
OriIma=imread('coffee.jpg');
GrayOri=rgb2gray(OriIma);figure,imshow(GrayOri);color=[0 0 0];MaskGrayOri=imoverlay(GrayOri,Bgmclose3,color);figure,imshow(MaskGrayOri);
      ??? Undefined function or method 'imoverlay' for input arguments of type 'uint8'.
Is there any alternative to overlay that i can use??

Best Answer

Perhaps you have not downloaded the MATLAB File Exchange contribution you need. imoverlay() is not part of MATLAB.
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