how can change the angle of image ?
4 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi everyone I have image I want change the angle of this image to be horizontal how can I do it? Thank you
0 commentaires
Réponses (2)
Thomas
le 27 Juil 2012
something like this? Based on the method shown here: http://stackoverflow.com/questions/5770818/how-to-align-image-matlab
I = imread('http://up.arab-x.com/Apr12/Yen90992.jpg');
%# egde detection
BW = edge(rgb2gray(I), 'canny');
%# hough transform
[H T R] = hough(BW);
P = houghpeaks(H, 4, 'threshold',ceil(0.75*max(H(:))));
lines = houghlines(BW, T, R, P);
out = imrotate(I,lines(1).theta);
subplot(121)
imshow(I)
subplot(122)
imshow(out)
0 commentaires
Image Analyst
le 27 Juil 2012
Perhaps imrotate() or imtransform()?
2 commentaires
Ryan
le 27 Juil 2012
Modifié(e) : Ryan
le 27 Juil 2012
I would tackle it with this strategy:
- Find the top-most black pixel (in this case your upper left corner).
- Find the right-most black pixel (in this case your upper right corner).
- Use the change in width and height, along with trig to find the angle of rotation (it's like a triangle)
This strategy can be adapted to handle rotation the other way as well, but will not work past an 89 degree rotation in either direction.
Voir également
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!