I have a binary image that I want to omit objects which their length/width ratio is more than a threshold (let's assume threshold=7). First, I used codes below to extract all connected components and major and minor axis length:
labeledImage = bwlabel(my_image, 8);
Length = regionprops(labeledImage , 'MajorAxisLength');
Width = regionprops(labeledImage , 'MinorAxisLength');
Then I calculated the length/width ratio for each component and placed them in matrix X_mat
L_cell=struct2cell(Length);
W_cell=struct2cell(Width);
L_mat=cell2mat(L_cell);
W_mat=cell2mat(W_cell);
X_mat=(L_mat./W_mat);
them in a matrix named "X_mat"
My idea was to convert matrix X_mat to a structure named X_struct, and then replace values of Length structure with those of X_struct. So I could use the codes I copied (from Image Segmentation Tutorial by Image Analyst) to extract desired objects.
M=ones(1,length(L_mat));
X_cell=mat2cell(X_mat,1,M);
"X_cell"
I tried to produce field names for X_struct using a for loop:
the names are supposed to be like this: length(1,1), length(1,2)...and so on to length(1,length(L_mat))
for jj=1:length(L_mat)
field_name{1,jj}=sprintf('length(1,%d)',jj);
end
All_Building_Ratio=[Length.MajorAxisLength];
Allowable_Ratio_Index=(All_Building_Ratio<7);
Keeper_Indexes=find(Allowable_Ratio_Index);
Keeper_Building_Image=ismember(labeledImage,Keeper_Indexes);
figure,imshow(Keeper_Building_Image);title('thresholded image by R');
1. How can I exactly create a structure X_struct out of the cell X_cell ???
X_struct must be exactly the same as the Length structure (which I assume is a 1-by-1 structure with p=length(L_mat) fields).
My every attempt in this part ends up with an error!!!
2. Is this idea practical at all??
Aren't there any better ways to extract objects from an image according to their length/width ratio?
Thanks in advance
