Plot over an image

260 views (last 30 days)
Hello, I am trying to place a plot over an image and is not working.
CODE: a=[xu,xl]; %start and end x coordinates of blue line
b=[yl,yr]; %start and end y coordinates of blue line
c=[xu,xl]; %start and end x coordinates of green line
d=[yr,yl]; %start and end y coordinates of green line
imshow(img), colormap jet
hold on
plot(a,b,'blue',c,d,'green')
hold off
Does anyone has any ideia of what's wrong?
Thanks!

Accepted Answer

Joseph Cheng
Joseph Cheng on 31 Mar 2017
Edited: Joseph Cheng on 31 Mar 2017
I would check your points. i see that b and d are swapped, but is there sufficient distances for you to see it with the image behind? are you sure that there isn't just a 1~2 pixel line somewhere or that start and end points are the same. you could be drawing a dot, or too small of a line to notice anything.
x = rand(500,500,3);
a=[0 500];
b = [0 500];
c = [500 0];
d = [250 0];
imshow(x),colormap jet
hold on
plot(a,b,'blue',c,d,'green')
works and draws the image and lines.
  1 Comment
turningpoint
turningpoint on 31 Mar 2017
You are right! I was using the smaller version of the image(scatterbrain) Thanks a lot!

Sign in to comment.

More Answers (0)

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!