Rotate an object based on regionprops Orientation, MinFeret and MaxFeret angles
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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 个评论
Walter Roberson
2023-10-18
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.
采纳的回答
Walter Roberson
2023-10-17
移动:Matt J
2023-10-17
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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