Calculates an affine transform from three pairs of corresponding points

T = cv.getAffineTransform(src, dst)

Input

• src Coordinates of triangle vertices in the source image. A numeric 3-by-2 row vectors or a cell-array of 2-element vectors of length 3 {[x,y], [x,y], [x,y]}
• dst Coordinates of the corresponding triangle vertices in the destination image. Same type and size as src.

Output

• T 2-by-3 affine transformation matrix

The function calculates the 2x3 matrix of an affine transform so that:

[X_i; X_i] = T * [x_i; y_i; 1]

where:

dst(i,:) = [X_i, Y_i], src(i,:) = [x_i, y_i]  for i=1,2,3