problem with output of imrotate function.
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
fred bnm
am 25 Mai 2018
Bearbeitet: sparrow Jr
am 26 Mai 2018
Hi, after using imrotate function, why center of object is changing. this problem is appear by obtain center of object before and after rotation. please guide me how to rotate image without changing coordination of center's object. original image:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/190842/image.jpeg)
output after rotation:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/190843/image.jpeg)
clc;clear;
img = imread('ms0.jpg');
degree = 45;
img1 = imrotate(img,-degree,'crop');
prob1 = regionprops(img,'centroid');
prob2 = regionprops(img1,'centroid');
img_center = prob1.Centroid;
img1_center = prob2.Centroid;
img_center = round(img_center);
img1_center = round(img1_center);
fprintf('center before rotation is : ( %d , %d ) \n.',img_center(1),img_center(2));
fprintf('center after rotation is : ( %d , %d ) \n.',img1_center(1),img1_center(2));
0 Kommentare
Akzeptierte Antwort
Image Analyst
am 25 Mai 2018
imrotate() rotates about the center of the center of the image. Your blob is not at the center of the image so it will move. Perhaps you should crop your image if you want it to be at the center of an image.
3 Kommentare
Image Analyst
am 26 Mai 2018
See my Image Segmentation Tutorial to learn how you can call regionprops() to crop out the bounding box of your blob https://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862&sort=downloads_desc
props = regionprops(binaryImage, 'BoundingBox');
croppedImage = imcrop(binaryImage, props.BoundingBox);
imrotate(croppedImage, angle);
sparrow Jr
am 26 Mai 2018
Bearbeitet: sparrow Jr
am 26 Mai 2018
Hello, Sir.. Thank you so much for your comment in my thread. I would like to ask you further questions about matlab. Would you mind if I send you an email? Iam so sorry for my comment here.
Best regard, Sparrow.
Weitere Antworten (0)
Siehe auch
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!