i have a binary image, and i want to measure the wide of object ( white pixel). how to measure it ? please help. thanks
MATLAB: How to measure the wide of object in binary image
Image Processing Toolboximage segmentation
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In this case, you should pick up the region, that has maximum diameter, from the output of regionprops function. Based on your original code, I have slightly modified to do that.
I = imread('8122bCXHqPL._SY463_.jpg');Igray = rgb2gray(I);BW = imbinarize(Igray); % Measure the outer radius
BWout = ~BW; BWout = imfill(BWout,'holes');statOuter = struct2table(regionprops(BWout,{'MajorAxisLength','Centroid'}));[~,idxOuter] = max(statOuter.MajorAxisLength);outerRadius = statOuter.MajorAxisLength(idxOuter)/2; % Measure the inner radius
BWin = imclearborder(BW); BWin = imopen(BWin, strel('disk',5)); statInner = struct2table(regionprops(BWin,{'MajorAxisLength','Centroid'}));[~,idxInner] = max(statInner.MajorAxisLength);innerRadius = statInner.MajorAxisLength(idxInner)/2; % Show the result
figureimshow(I) hold on viscircles(statOuter.Centroid(idxOuter,:), outerRadius,'Color','r') viscircles(statInner.Centroid(idxInner,:), innerRadius,'Color','r')
See my Image Segmentation Tutorial where I demonstrate that: http://www.mathworks.com/matlabcentral/fileexchange/25157-image-segmentation-tutorial---blobsdemo--
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