how to find regionprops max(area) ind?

Question

tsai kai shung 2017-10-30

0
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https://ww2.mathworks.cn/matlabcentral/answers/364011-how-to-find-regionprops-max-area-ind

回答： tsai kai shung 2017-10-30

40.JPG

if true
  clear all;
clc;
img = imread('40.jpg');
tic
I = rgb2hsv(img);

channel1Min = 0.956; channel1Max = 0.006;

channel2Min = 0.594; channel2Max = 0.886;

channel3Min = 0.529; channel3Max = 0.780;

sliderBW = (I(:,:,1) >= channel1Min ) | (I(:,:,1) <= channel1Max) &(I(:,:,2) >= channel2Min ) & (I(:,:,2) <= channel2Max) & (I(:,:,3) >= channel3Min ) & (I(:,:,3) <= channel3Max); BW = sliderBW; bw3 = areaimg(BW); bw3 = ratioimg(bw3); imshow(bw3); S = regionprops(bw3,'BoundingBox','Area'); BW_2 = imcrop(img,[S.BoundingBox(1,:)]); end

i have a problem that is If the noise in my image is not filtered clean then the regionprops show Two or more struct then It will show an error so how to use one ind to replace imcrop(img,[S.BoundingBox(1,:)]);

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tsai kai shung 2017-10-30

在 MATLAB Online 中打开

if true
  clear all;
clc;
img = imread('40.jpg');
tic
I = rgb2hsv(img);

channel1Min = 0.956; channel1Max = 0.006;

channel2Min = 0.594; channel2Max = 0.886;

channel3Min = 0.529; channel3Max = 0.780;

sliderBW = (I(:,:,1) >= channel1Min ) | (I(:,:,1) <= channel1Max) &(I(:,:,2) >= channel2Min ) & (I(:,:,2) <= channel2Max) & (I(:,:,3) >= channel3Min ) & (I(:,:,3) <= channel3Max);

BW = sliderBW;

bw3 = areaimg(BW);

bw3 = ratioimg(bw3); imshow(bw3);

S = regionprops(bw3,'BoundingBox','Area');

BW_2 = imcrop(img,[S.BoundingBox(1,:)]);

end

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