why this error??

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??

Answer 1

[Walter Roberson]

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

[supriya]

I have downloaded it but the error persists..!! plz help!

[supriya]

actually i want to mask(logical) my graay scale image(unit8)..can i do it any other way?

[Walter Roberson]

Is the downloaded imoverlay routine on your path? Which directory do you expect it to be in? What happens if you command

which -all imoverlay

does it show any imoverlay.m file?

Applying logical masking to a grayscale image is usually just a matter of indexing, possibly logical indexing.