MATLAB: How to crop an portion fro image

crop

I have a code below
clc
clear all
close all
I = imread('rice.png');
imshow(I)
background = imopen(I,strel('disk',15));
I2 = I - background;
imshow(I2)
I3 = imadjust(I2);
imshow(I3);
level = graythresh(I3);
bw = im2bw(I3,level);
bw = bwareaopen(bw, 50);
imshow(bw)
cc = bwconncomp(bw, 4)
grain = false(size(bw));
grain(cc.PixelIdxList{50}) = true;
grain(cc.PixelIdxList{30}) = true;
grain(cc.PixelIdxList{80}) = true;
grain(cc.PixelIdxList{75}) = true;
grain(cc.PixelIdxList{70}) = true;
imshow(grain);
now want to crop the grains shown in binary image from original image ,kindly help

Best Answer

Use regionprops to extract all sort of information on your connected components. In particular, the Image field of the structure array returned by regionprops will contain the binary image of each grain.
props = regionprops(cc, 'Image'); %to just get the image of each grain.
%props(1).Image will be the image of the first grain,
%props(2).Image will be the image of the second grain,
%etc.
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