Dilation by creating structuring element will dilate in all direction, but I want to do dilation in a particular direction, say 70 degree from a particular pixel. I understand that I need to write a self-adaptive function, but how? For example, I have a line with slope of 70 degree. I want to increase the length of the line in both end (by dilation). If i use "bwmorph()", it increases in all direction, But I need only in one direction.
MATLAB: Morphological dilation in a certain direction
digital image processingdilationdilation with directionImage Processing Toolboxmorphology
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regionprops on binary looks at 1 values to select the locations to be measured. Your image is mostly 1's, all of the white. You are measuring the properties of the white. You should be using regionprops on ~BW
Same as previous post, you can utilize regionprops function, like:
% Read your image and binarize
I = imread('5159-15B front_imgJ-macro.jpg');I = rgb2gray(I);BW = imbinarize(I);% Apply regionprops function
s = regionprops(~BW,{'MajorAxisLength','MinorAxisLength','Orientation','PixelIdxList'});s = struct2table(s);% Extract the regions which satisfies both the following conditions:
% (1) (Minor axis length)/(Major axis length) <= 20%
% (2) Angle with horizontal line is +/-45 degree with 10 degree margine
idx =...(s.MinorAxisLength ./ s.MajorAxisLength <= 0.2) &...(abs(abs(s.Orientation)-45) <= 10);s = s(idx,:);% Show the result
BWout = true(size(BW));for kk = 1:height(s) BWout(s.PixelIdxList{kk}) = false;endfigureimshow(BWout)
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