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how to remove green pixels?

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Yoon ThiriZaw
Yoon ThiriZaw 2018-7-20
编辑： Yoon ThiriZaw 2018-7-23
i do plant disease detection and classification.i need a code to remove green pixels in matlab.i have done background removal using color thresholder app in matlab. I mean green pixels remove- " the pixels where the level of green is higher than red and blue are identified and remove by application of the mask.These green pixels most probably represent healthy areas in the leaves. Thus,after removing the background and green pixels,the region left in an image is the region of our interest" said in my thesis reference paper. If i get this green pixels remove, then i will do feature extraction using GLCM. So, how do i continue to remove green pixels? My code is given in the following:
% Title : Potato Leaf Diseases Detection based on Multiclass SVM
clc
close all
clear all
[filename, pathname] = uigetfile({'*.*';'*.bmp';'*.jpg';'*.gif'}, 'Pick a Leaf Image File');
I = imread([pathname,filename]);
I = imresize(I,[256,256]);
figure, imshow(I); title('Input Leaf Image');
%Preprocessing using median filtering
I1 = rgb2gray(I);
I2 = medfilt2(I1,[3 3]);
%imshow(I2);title('Filtered Image');
%%Image Segmentation
%Background Removing using Color Thresholder app
[bw,rgb] = background_removal(I);
This is my image after background masking using color thresholder app in matlab; then, how to remove green pixels ? I want to get only disease leaf area.

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采纳的回答

Matt J
Matt J 2018-7-20
val= max(rgb,[],3);
mask=uint8(rgb(:,:,2)~=val);
imshow(rgb.*mask);
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Image Analyst
Image Analyst 2018-7-23
You fix the bug that is giving you false. graycomatrix() and graycoprops() do not return false.
Yoon ThiriZaw
Yoon ThiriZaw 2018-7-23
编辑：Yoon ThiriZaw 2018-7-23
Can you give me code as an feature extraction example? I don't know how to explain when my presentation this segmentatin step bsxfun.

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