quiver plot on an image
14 次查看(过去 30 天)
显示 更早的评论
Hello
I am trying to quiverplot on an image, but quiver plot shows up very small on the upper left corner (attached here)
I have to use 'imshow' instead of 'imagesc' becasue I want the image in black and white and colored quiver vectors. When I assigne colormap for 'imagesc' it messes the quiver vectors.
Is there any way to superimpose quiver plot on imshow function?
thank you
0 个评论
采纳的回答
Voss
2024-3-1
编辑:Voss
2024-3-1
"Is there any way to superimpose quiver plot on imshow function?"
Yes.
% read an image:
img = imread('peppers.png');
% imshow the image:
imshow(img)
% make a quiver plot:
hold on
[m,n,~] = size(img);
[x,y] = meshgrid(1:n,1:m);
quiver(x,y,randn(m,n),randn(m,n))
% zoom in to see some details:
xlim([101 115])
ylim([101 110])
It looks like the x and y you use in quiver are incorrect is why your quiver plot is so small.
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Vector Fields 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!