How to crop an portion fro image

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nkumar
nkumar 2014-11-13
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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采纳的回答

Guillaume
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
Siam 2014-11-13
You can try with imcrop()
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nkumar
nkumar 2014-11-14
es my image has 5 grains ,now i want to crop them from original image,i.e i need the grains which in in binary image from original image,
I have 50,30,80,75,70th grains in binary image,same i need i in original image,how can i crop it
Guillaume
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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