Rotate an object based on regionprops Orientation, MinFeret and MaxFeret angles
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Asi
el 17 de Oct. de 2023
Comentada: Walter Roberson
el 18 de Oct. de 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 comentarios
Walter Roberson
el 18 de Oct. de 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.
Respuesta aceptada
Walter Roberson
el 17 de Oct. de 2023
Movida: Matt J
el 17 de Oct. de 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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