size_divergence.h File Reference

Calculate divergence from flow vectors by looking at line sizes beteween the points. More...

#include "lib/vision/image.h"

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Functions
float	get_size_divergence (struct flow_t *vectors, int count, int n_samples)
	Get divergence from optical flow vectors based on line sizes between corners. More...
float	get_mean (float *numbers, int n_elements)
	Get the sample mean of a vector of floats. More...

Detailed Description

Calculate divergence from flow vectors by looking at line sizes beteween the points.

Uses optical flow vectors as determined with a corner tracker and Lucas Kanade to estimate divergence.

Definition in file size_divergence.h.

Function Documentation

float get_mean	(	float *	numbers,
		int	n_elements
	)

Get the sample mean of a vector of floats.

Parameters

[in]	numbers	Vector of numbers
[in]	n_elements	Number of elements

Returns

mean

Definition at line 136 of file size_divergence.c.

Referenced by get_size_divergence().

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float get_size_divergence	(	struct flow_t *	vectors,
		int	count,
		int	n_samples
	)

Get divergence from optical flow vectors based on line sizes between corners.

Parameters

[in]	vectors	The optical flow vectors
[in]	count	The number of optical flow vectors
[in]	n_samples	The number of line segments that will be taken into account. 0 means all line segments will be considered.

Returns

divergence

Definition at line 44 of file size_divergence.c.

References flow_t::flow_x, flow_t::flow_y, get_mean(), NO_DIV, flow_t::pos, point_t::x, and point_t::y.

Referenced by calc_fast9_lukas_kanade().

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