Finding ellipses and lines in images using the edges

The original greyscale image

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The detected and segmented most significant edges

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The lines detected using a modified version of Lowe's algorithm

The lines are shown in green with white crosses showing the endpoints.

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The elliptical arcs and lines detected using the algorithm of Rosin and West

The ellipses are shown in bold and blue (replacing the lines in the previous figure), the retained lines in blue and the endpoints of the features with white crosses

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The ellipses and lines overlaid on the original image

Ellipses shown in blue, lines in green.

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