removing Non-green background from image
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hello,
I'm trying to eliminate non-green background from an image. You can see my below codes, I think It's working. But the thing is, after this process (or any other suggestion), I want to keep leaves as exactly in original photos without background.
Many thanks in advance.
Orjinal photo:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/148339/image.jpeg)
I want to get like this(you can see background is black, means it's removed):
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/148340/image.jpeg)
al1 = imread('23.JPG');
r=single(al1(:,:,1));
g=single(al1(:,:,2));
b=single(al1(:,:,3));
ExGreen=2*g-r-b;
ExRed=1.4*r-g-b;
dev=imsubtract(ExGreen,ExRed);
% otsu thresholding
thres_level = multithresh(dev,1); % automatic thresholding
seg_I = imquantize(dev,thres_level);
RGB = label2rgb(seg_I,'gray');
RGB2 = single(bwareaopen(RGB,1000000)); %clean the areas smaller than 1million pixels
k=imfuse(al1, RGB2,'montage'); %composite of 2images
imshow(k)
댓글 수: 1
Madhulatha K N
2018년 7월 11일
thank you for posting the question. it is helping me with a project where I need to do the same as you are doing. But what are ExGreen nd ExRed variables in the code? what are they being calculated for?
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Jon
2015년 8월 23일
Try this:
BW = RGB2(:,:,1);
BW = uint8(imfill(BW,'holes'));
leaves_only = al1;
for a = 1:3
leaves_only(:,:,a) = leaves_only(:,:,a).*BW;
end
imshow(leaves_only)
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