Fully invariant generalized Hough transform by
out of focus multiview sensing with pupil array
Posted on 2019-09-23 - 22:58
Recognition of geometrical shapes in real-time and fully invariant (i.e. invariant under
changes in position, scale and orientation) is a demanding task in automated image analysis. In
particular, the generalized Hough transform (GHT) is a well-known algorithm for the recognition
of complex patterns out of edge binary images even with disconnected boundaries or corrupted
by noise. In this work we present a space multiplexed optical implementation of the GHT which,
by exploiting the redundancy derived from multiview sensing of a 2D image and its out of focus
capture with an adequate pupil array, allows to obtain in a single shot the GHT of this image
invariant to shift, scale and orientation of the target. Experimental validation of the working
principle is presented, along with an assessment of the robustness of the system against noise in
the input.
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Fernández, Ariel; Llaguno, Juan; González, Gastón García; Lezama, Facundo; Alonso, Julia (2019). Fully invariant generalized Hough transform by
out of focus multiview sensing with pupil array. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4496987.v1
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AUTHORS (5)
AF
Ariel Fernández
JL
Juan Llaguno
GG
Gastón García González
FL
Facundo Lezama
JA
Julia Alonso