MATLAB: I have this code that detects vegetation from a picture. i want to remove it. how should i do that

color segmentationImage Processing Toolboxleaf

Image1 = im2double(imread('image\8.jpg'));
g=rgb2gray(Image1);
[row column page] = size(Image1)
mask = Image1(:,:,2) > Image1(:,:,1) & Image1(:,:,2) > Image1(:,:,3);
Image2 = Image1 .* mask(:,:,[1 1 1]);
figure,imshow(Image2);
title('light green');
mask = Image2(:,:,2) + 20 > Image2(:,:,1) & Image2(:,:,2) + 20 > Image2(:,:,3);
Image3 = Image2 .* mask(:,:,[1 1 1]);
figure,imshow(Image3);
title('dark green');

Best Answer

See my color segmentation demos in my File Exchange http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

Or else search on the tag "leaf".

Or else use imseggeodesic(). Look up examples in the help for it.

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MATLAB: How to convert the green pixels to white

%black pixels have 0 for all 3 components, R, G, B. So a non-black pixel has at least one non-0 component
mask = any(YourRGBImage,3);     %true if any component is non-zero
%now that we know which ones are non-black, make those pixels white
%ah, short-cut: since logical true is 1 and white is 1, and logical false is 0 and black is 0
%we can just use the mask itself as the black / white image
maskedImage  = double(repmat(mask, 1, 1, 3));

MATLAB: What is wrong with the following piece of code? Im trying to detect light and dark green vegetation. It just displays a black empty image

Your Image1 has been produced by im2double() so the range of Image1 is 0 to 1. But your second set of code has

Green = Image1 (i, j, 2) + 20;

so Green is going to be in the range (20+0) to (20+1), which is always going to be greater than the 0 to 1 entries already in Image1, so your "if" is always going to be true.

Note that your second block of code, involving "Green" is going to completely overwrite the output of the first block of code. Your first block might as well not be there.

Your first block could be rewritten without loops as

mask = Image1(:,:,2) > Image1(:,:,1) & Image1(:,:,2) > Image1(:,:,3);
Image2 = Image1 .* mask(:,:,[1 1 1]);

and your second block could be rewritten without loops as

mask = Image1(:,:,2) + 20 > Image1(:,:,1) & Image1(:,:,2) + 20 > Image1(:,:,3);
Image2 = Image1 .* mask(:,:,[1 1 1]);

Best Answer

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MATLAB: How to convert the green pixels to white

MATLAB: What is wrong with the following piece of code? Im trying to detect light and dark green vegetation. It just displays a black empty image

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