How it works...

The objective of the Hough transform is to find all lines in a binary image that passes through a sufficient number of points. It proceeds by considering each individual pixel point in the input binary map and identifying all possible lines that pass through it. When the same line passes through many points, it means that this line is significant enough to be considered.

The Hough transform uses a two-dimensional accumulator in order to count how many times a given line is identified. The size of this accumulator is defined by the specified step sizes (as mentioned in the preceding section) of the (ρ, θ) parameters of the adopted line representation. To illustrate the functioning of the transform, let's create a 180 by 200 ...

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