about image pixel rotate

UTA
2013 5 30
1 个回答
7 次查看（30 天）

1 个投票

Hi everyone,
I use 'imrotate' function to rotate a image, the rotate degree is theta, however, how can I get the location of fix points,let's say (x,y), after image rotated.
Thanks

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回答（1 个）

Matt J
Matt J 2013-5-30

2 个投票

Apply a rotation matrix,
R=@(theta) [cosd(t), -sind(t); sind(t), cosd(t)];
c=size(image)/2+1/2;
newpoint = R(theta)*([x,y]-c).'

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UTA
UTA
2013-5-30

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