How to crop an portion fro image

Question

nkumar 2014-11-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/162550-how-to-crop-an-portion-fro-image

评论： Guillaume 2014-11-14

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

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Answer 1

Guillaume 2014-11-13

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/162550-how-to-crop-an-portion-fro-image#answer_158840

在 MATLAB Online 中打开

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.