Vertex characterization via second-order topological derivatives
For computer vision tasks like 3D scene understanding, this provides a new way to detect vertices, but results are preliminary and incremental.
The paper introduces a method using second-order topological derivatives to identify vertex location and type (number of lines and angles) in 2D images, with numerical tests showing effectiveness.
This paper focuses on identifying vertex characteristics in 2D images using topological asymptotic analysis. Vertex characteristics include both the location and the type of the vertex, with the latter defined by the number of lines forming it and the corresponding angles. This problem is crucial for computer vision tasks, such as distinguishing between fore- and background objects in 3D scenes. We compute the second-order topological derivative of a Mumford-Shah type functional with respect to inclusion shapes representing various vertex types. This derivative assigns a likelihood to each pixel that a particular vertex type appears there. Numerical tests demonstrate the effectiveness of the proposed approach.