Rotate image parallel to the x-axis
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Hello
If I select two points in the picture, and then I extracted the angle between this two points, (note between them line to clarify) Like this picture:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/195604/image.jpeg)
Can I rotate the image so that the path between these two points is parallel to the x-axis, as in the following picture?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/195606/image.jpeg)
I mean if I have two points in a gray or binary image, I want to rotate this image so that the path between the two points is parallel to the X axis.
thank you
8 个评论
dpb
2018-9-13
It's not the Q? that's unclear, I was pointing out you must define which direction the angle is defined from and ensure you do the rotation to negate the angle as opposed to adding to it...
As others said, your description of what is not as expected is not useful
采纳的回答
Amir Xz
2018-9-13
A = [50 70]; %[x y] & x,y: pixel number
B = [100 30]; %[x y]
% find point2 (point with larger x)
if A(1)>B(1)
P2 = A; P1 = B;
else
P2 = B; P1 = A;
end
% clockwise OR counterclockwise
if P2(2)<P1(2)
w=-1; % clockwise
else
w=+1; % counterclockwise
end
angle = w*atan(abs(P2(2)-P1(2))/(P2(1)-P1(1)))*180/pi; % deg
ImgRot = imrotate(Img,angle);
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