Describe: Circles We can extend the Hough transform to other shapes that can be expressed parametrically. For example, a circle of fixed radius can be described fully by the location of its center (x, y). Think of each feature (edge) point on the circle as saying, ¡±if I¡¯m on the circle, the center must be in one of these places¡±. It turns out that the locus of these votes is itself a circle. But what about circles of unknown size? In this case, we need a third parameter: the radius of the circle. So, we can parameterize circles of arbitrary size by (x, y, r). Instead of casting votes in a circular pattern into a two-dimensional accumulator, we cast votes in circles of successively larger size in a three-dimensional accumulator.

File list(Click to check if it's the file you need, and recomment it at the bottom):
  HoughObject\HoughObject.fig
  ...........\HoughObject.m
  ...........\license.txt
  ...........\ObjectTemplate.mat
  ...........\pic0022.jpg
  HoughObject

 To Search: Hough transform hough edge arc matlab 

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 [Circular_Hough.zip] - it s used to detect circles in edge image as input by Hough transform. you can assign a region of interest (ROI) to find center of circle in it.it s e