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Ask you a digital image geometric transformation problem. . . .

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Post time: 2020-1-17 12:40:01
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If any image is rotated 60 degrees counterclockwise around the point P (x, y) = (100,260), find its geometric transformation formula.
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Post time: 2020-4-9 00:15:01
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First shift the origin to (100, 260)
Ie A = 1 0 -100
    0 1 -260
    0 0 1
Then rotate
B = cos60 -sin60 0
  sin60 cos60 0
  0 0 1
Then pan back
C = 1 0 100
    0 1 260
    0 0 0
Converted to C * B * A
Note that the homogeneous coordinates used [x, y, 1] '
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