Mathematical Problems in Engineering / 2019 / Article / Fig 3

Research Article

EL: Local Image Descriptor Based on Extreme Responses to Partial Derivatives of 2D Gaussian Function

Figure 3

Polar arrangement of seventeen Gaussian summation regions. Circles indicate 1 standard deviation. For a patch size, the standard deviations are , , and . The centers of the Gaussian summation regions lie on the rings with radii , , and . All measures are in pixels.

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