How to crop an portion fro image
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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
采纳的回答
Guillaume
2014-11-13
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.
更多回答（1 个）
Siam
2014-11-13
1 个投票
You can try with imcrop()
4 个评论
nkumar
2014-11-13
Siam
2014-11-13
Your question was not clear as it says how to crop a portion from image. Not sure what actually you want to do? your code gives you 5 grains in white color and background in black. So why do you have to crop them? Can you explain a bit more?
nkumar
2014-11-14
Guillaume
2014-11-14
Doesn't my answer do what you want?
Note that crop is probably not the appropriate word. It sounds like what you want is to extract part of an image.
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