Rotate an object based on regionprops Orientation, MinFeret and MaxFeret angles
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Asi
le 17 Oct 2023
Commenté : Walter Roberson
le 18 Oct 2023
How can I rotate an object based on regionprops Orientation, MinFeret and MaxFeret angles?
My aim is that the object and the regionprops based plotted lines will be 0 or 90 degrees.
Thanks.
Code:
close all;
clear;
clc;
I = (insertText(zeros(150,150),[0 0],'B','BoxOpacity',0,'FontSize',70,'TextColor','w'));
I = imrotate(I,15);
I = rgb2gray(I);
figure('Name','Img');
imshow(I);
I=flipud(I);
BW = imbinarize(I);
[B,L] = bwboundaries(BW,'noholes');
k=1;
st = regionprops(I,"Centroid","MajorAxisLength","Orientation","MinFeretProperties","MaxFeretProperties");
b = B{k};
c = st(k).Centroid;
yBoundary = b(:,2);
xBoundary = b(:,1);
cy = c(:,2);
cx = c(:,1);
figure('Name','Boundary and lines');
plot(yBoundary, xBoundary, 'black', 'linewidth', 2);
hlen = st.MajorAxisLength/2;
xCentre = st.Centroid(1);
yCentre = st.Centroid(2);
cosOrient = cosd(st.Orientation);
sinOrient = sind(st.Orientation);
xcoords = xCentre + hlen * [cosOrient -cosOrient];
ycoords = yCentre + hlen * [-sinOrient sinOrient];
line(xcoords, ycoords, 'Color','red');
line([st.MaxFeretCoordinates(1),st.MaxFeretCoordinates(2)],[st.MaxFeretCoordinates(3),st.MaxFeretCoordinates(4)],'Color','blue');
line([st.MinFeretCoordinates(1),st.MinFeretCoordinates(2)],[st.MinFeretCoordinates(3),st.MinFeretCoordinates(4)],'Color','green');
orientationRotImg = imrotate(I, st.Orientation-90);
figure('Name','orientationRotImg');
imshow(orientationRotImg)
MaxFeretAngleRotImg = imrotate(I, st.MaxFeretAngle-90);
figure('Name','MaxFeretAngleRotImg');
imshow(MaxFeretAngleRotImg)
MinFeretAngleRotImg = imrotate(I, st.MinFeretAngle-90);
figure('Name','MaxFeretAngleRotImg');
imshow(MinFeretAngleRotImg)
3 commentaires
Walter Roberson
le 18 Oct 2023
The min ferret angle and max ferret angle are not typically going to be 90 degrees from each other, so requiring that both be rotated to horizontal or vertical is not typically going to work.
Réponse acceptée
Walter Roberson
le 17 Oct 2023
Déplacé(e) : Matt J
le 17 Oct 2023
close all;
clear;
clc;
I = (insertText(zeros(150,150),[0 0],'B','BoxOpacity',0,'FontSize',70,'TextColor','w'));
I = imrotate(I,15);
I = rgb2gray(I);
figure('Name','Img');
imshow(I);
I=flipud(I);
BW = imbinarize(I);
[B,L] = bwboundaries(BW,'noholes');
k=1;
st = regionprops(I,"Centroid","MajorAxisLength","Orientation","MinFeretProperties","MaxFeretProperties");
MinFeretAngleRotImg = imrotate(I, st.MinFeretAngle);
figure('Name','MaxFeretAngleRotImg');
imshow(MinFeretAngleRotImg)
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