OpenCV 3.x with Python By Example - Second Edition

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We can choose four control points in the source image and map them to the destination image. Parallel lines will not remain parallel lines after the transformation. We use a function called getPerspectiveTransform to get the transformation matrix.

Let's apply a couple of fun effects using projective transformation, and see what they look like. All we need to do is change the control points to get different effects.

Here's an example:

The control points are as follows:

src_points = np.float32([[0,0], [0,rows-1], [cols/2,0],[cols/2,rows-1]])dst_points = np.float32([[0,100], [0,rows-101], [cols/2,0],[cols/2,rows-1]])

As an ...