How to rotate a line using Matlab?
27 ビュー (過去 30 日間)
Suppose I have an image I and a line h1. Using Matlab, I can draw the line (or segment) like this (in red) :
h1 = plot( [l1 l1],[20 100], 'r');
Now I want to rotate the image I with an angle of 45°. So I used imrotate like this:
IR = imrotate(I,45);
Now, I want to rotate the line, how to do that using Matlab ?
PS: I found the function rotate. I am trying this, but it is not working !
Image Analyst 2015 年 5 月 16 日
imrotate() rotates an entire image, not a line you created with line() or plot(). You need to take your points and multiply by the rotation matrix - you know, the sin and cos thing you learned in your linear algebra class in college. Then call line() or plot() again with the rotated coordinates.