Hough transform of equilateral triangles_篮球即时比分_nba比分直播-彩客网重点推荐

andrekle
2021-12-02T10:32:56.006Z
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www.uio.no

There are a few related errors in the description of the Hough representation of equilateral triangles in slide 40, slide 41, and the solution hints to IN5520/9520 Exam 2019 Exercise 3c. The peaks in the Hough representation will be π/3 apart along the θ-axis (so the descriptions are correct on that), but the associated values along the ρ-axis will alternative between being positive and negative with constant absolute value (the descriptions incorrectly state that the ρ-values are constant).

In order to rectify this, the following two changes should be applied to slide 40:
1. From: "The normals onto the three sides are of the same length, => ρ=h"
to: "The normals onto the three sides are of the same length, => abs(ρ)=h"
2. From "A: The three maxima in the (θ,ρ)-domain will slide in the positive θ-direction, keeping the 60 degree (π/3) distance between the maxima and a constant ρ-value, sliding out of the [-π/2,π/2]-domain at...