Swirl filter. Creating a swirl effect is similar to rotation, except that the angle changes as a

Question:

Swirl filter. Creating a swirl effect is similar to rotation, except that the angle changes as a function of distance to the center of the image. Use the same formulas as in the previous exercise, but compute as a function of $\left(s_{i}, s_{j}\right)$, specifically $\pi / 256$ times the distance to the center.

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