Rotate image parallel to the x-axis

5 次查看（过去 30 天）

wisam kh 2018-9-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/418535-rotate-image-parallel-to-the-x-axis

评论： wisam kh 2018-9-14

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:

Can I rotate the image so that the path between these two points is parallel to the x-axis, as in the following picture?

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
显示 6更早的评论隐藏 6更早的评论

wisam kh 2018-9-13

Sorry if my question is unclear.

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.

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

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Amir Xz 2018-9-13

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/418535-rotate-image-parallel-to-the-x-axis#answer_336712

在 MATLAB Online 中打开

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);