The explanation of each step in ellipse fitting code
4 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Walaa
el 6 de Abr. de 2023
Comentada: Matt J
el 6 de Abr. de 2023
I need help understanding each line of this code.
% Calculate centroid, orientation and major/minor axis length of the ellipse
s = regionprops(BW,{'Centroid','Orientation','MajorAxisLength','MinorAxisLength'});
% Calculate the ellipse line
theta = linspace(0,2*pi);
col = (s.MajorAxisLength/2)*cos(theta);
row = (s.MinorAxisLength/2)*sin(theta);
M = makehgtform('translate',[s.Centroid, 0],'zrotate',deg2rad(-1*s.Orientation));
D = M*[col;row;zeros(1,numel(row));ones(1,numel(row))];
0 comentarios
Respuesta aceptada
Matt J
el 6 de Abr. de 2023
Editada: Matt J
el 6 de Abr. de 2023
I've added some comments.
% Calculate centroid, orientation and major/minor axis length of the ellipse
s = regionprops(BW,{'Centroid','Orientation','MajorAxisLength','MinorAxisLength'});
theta = linspace(0,2*pi);
col = (s.MajorAxisLength/2)*cos(theta);
row = (s.MinorAxisLength/2)*sin(theta); %coordinates of points (col,row) on unrotated ellipse
M = makehgtform('translate',[s.Centroid, 0],'zrotate',deg2rad(-1*s.Orientation)); %rotation matrix
D = M*[col;row;zeros(1,numel(row));ones(1,numel(row))];%points on rotated ellipse
2 comentarios
Más respuestas (0)
Ver también
Categorías
Más información sobre Animation en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!