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Figure 2 | BioMedical Engineering OnLine

Figure 2

From: Automatic tracking of cells for video microscopy in patch clamp experiments

Figure 2

Filters and types of matching used by SURF. (A), (B), and (C) Approximation of Gaussian second order partial derivatives using box filters: D x y in xy-direction, D x x in x-direction and y-direction in D y y , respectively, with increased kernel size from (9×9) to (15×15) in (C). (D) Haar wavelet filters in response to dx (top) and dy (bottom) directions with (σ=2s) kernel size. (E) Candidate interest points to perform matching are combinations between circular areas with the same contrast and, the oposite are not considered.

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