File:Resolution Figure.png
This figure shows the effect of increasing the number of steps in a Hough circle transform.
The first panel shows a circle and three regular polygons: a 4-gon, 8-gon, and 16-gon.
The second panel shows a Hough circle transform with four steps. Since all the shapes are radially symmetrical with 90° rotations, they all have an equal peak score at their centroids.
The third panel shows a Hough circle transform with eight steps. Since the circle, 8-gon, and 16-gon radially symmetrical with 45° rotations, they all have an equal peak score at their centroids. These shapes have a higher score at their centroids than the 4-gon, because it lacks 45° radial symmetry.
The fourth panel shows a Hough circle transform with sixteen steps. Only the circle and 16-gon are radially symmetrical at this resolution, so their centroids have equally high scores, while the 4-gon and 8-gon have significantly lower scores.
The fifth panel shows a Hough circle transform with 400 steps. The centroid of the circle now has a higher score than all of the other shapes, allowing for the circle to be distinguished even from the 16-gon.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:06, 6 February 2017 | | 2,632 × 512 (73 KB) | Llamero (talk | contribs) | This figure shows the effect of increasing the number of steps in a Hough circle transform. The first panel shows a circle and three regular polygons: a 4-gon, 8-gon, and 16-gon. The second panel shows a Hough circle transform with four steps. S... |
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