MATLAB: How to create multiple ROI in the same figure? I’d like to manually draw multiple region on an image to create a mask of the drawn regions. I attached the code to do it using ellipse that does the job for 5 region, but only last region is displayed

image processing

I = imread('13170.jpg');
im = imshow(I);
e = imellipse(gca);% now pick ROI
BW = createMask(e,im);% get BW mask for that ROI
BW(:,:,2) = BW;
BW(:,:,3) = BW(:,:,1);
ROI = I;
ROI(BW == 0) = 255;
figure, imshow(ROI,'Border','tight');

Best Answer

You put a loop and call the code the number of times you want. Just call it multiple times and save all the regions.

Refer this file exchange, may be useful: https://in.mathworks.com/matlabcentral/fileexchange/31388-multi-roi-mask-editor-class

Related Solutions

MATLAB: It’s using imellipse that does the job for 5 region, but only the last region is displayed. How to do for each region save to array, for each array draw it out, then for each object in array draw it out. Thanks

clc; clear all;
N = 5 ;
I = imread('junk.jpg');
iwant = cell(N,1) ;
for i = 1:N
    im = imshow(I);
    e = imellipse(gca);% now pick ROI
    setColor(e, 'red');
    % position = wait(e);
    BW = createMask(e,im);% get BW mask for that ROI
    BW(:,:,2) = BW;
    BW(:,:,3) = BW(:,:,1);
    ROI = I;
    ROI(BW == 0) = 255;
    iwant{i} = ROI ;
end
for i = 1:N
    figure
    imshow(iwant{i},'Border','tight');
end

MATLAB: How to connect pixels of a binary image as shown in picture

I would try morphological closing and see if that gets the result you want, e.g.

img = imread('image.png');
newimg = imclose(img, strel('disk', 3));

results in:

Best Answer

Related Solutions

MATLAB: It’s using imellipse that does the job for 5 region, but only the last region is displayed. How to do for each region save to array, for each array draw it out, then for each object in array draw it out. Thanks

MATLAB: How to connect pixels of a binary image as shown in picture

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