Why image rotates after adding to a figure- how to prevent it?

Question

BN 2020-4-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517632-why-image-rotates-after-adding-to-a-figure-how-to-prevent-it

评论： Star Strider 2020-4-13

采纳的回答： Star Strider

filename1.png

在 MATLAB Online 中打开

Hey all, I have a problem, I used this code to add my .png image to the current figure (map of the country),

gs = geoshow(A, cmap, R);
gs.CData(repmat(mask,1,1,3)) = 255;
axis equal
box on
hold on
%%% add png file to the current figure
[img, ~, tr] = imread('filename1.png');
im = image('CData',img,'XData',[50 51],'YData',[35 36]);
im.AlphaData = tr;
hold off

The picture adds successfully (colorful circle):

But I see it is rotated. in fact, my original .png is:

But after adding it to figure it seems to it has rotated by 180 degrees. I tried to rotate it before hold off part using imrotate function but it failed.

How can fix this problem?

Thanks