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error in vision.ImageComplementer and detectMSERFeatures(I)!!!!

saeedtkhsaeedtkh Posts: 1Member
[b]i am new in matlab and when i use this code , matlab doesn't recognize the function . what should i do? please help me. thanks

Compute the complement of an input image:[/b]

himgcomp = vision.ImageComplementer;
hautoth = vision.Autothresholder;

% Read in image
I = imread('coins.png');

% Convert the image to binary
bw = step(hautoth, I);

% Take the image complement
Ic = step(himgcomp, bw);

% Display the results
figure;
subplot(2,1,1), imshow(bw), title('Original Binary image')
subplot(2,1,2), imshow(Ic), title('Complemented image')

[b]and also this cod doesn't work:

Detect interest points, and mark their locations.
[/b]
I = imread('cameraman.tif');
regions = detectMSERFeatures(I);
imshow(I); hold on;
plot(regions);

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