Functions
VX_API_ENTRY vx_node VX_API_CALL	vxOpticalFlowPyrLKNode (vx_graph graph, vx_pyramid old_images, vx_pyramid new_images, vx_array old_points, vx_array new_points_estimates, vx_array new_points, vx_enum termination, vx_scalar epsilon, vx_scalar num_iterations, vx_scalar use_initial_estimate, vx_size window_dimension)
	[Graph] Creates a Lucas Kanade Tracking Node.

VX_API_ENTRY vx_status VX_API_CALL	vxuOpticalFlowPyrLK (vx_context context, vx_pyramid old_images, vx_pyramid new_images, vx_array old_points, vx_array new_points_estimates, vx_array new_points, vx_enum termination, vx_scalar epsilon, vx_scalar num_iterations, vx_scalar use_initial_estimate, vx_size window_dimension)
	[Immediate] Computes an optical flow on two images.

Detailed Description

Function Documentation

VX_API_ENTRY vx_node VX_API_CALL vxOpticalFlowPyrLKNode	(	vx_graph	graph,
		vx_pyramid	old_images,
		vx_pyramid	new_images,
		vx_array	old_points,
		vx_array	new_points_estimates,
		vx_array	new_points,
		vx_enum	termination,
		vx_scalar	epsilon,
		vx_scalar	num_iterations,
		vx_scalar	use_initial_estimate,
		vx_size	window_dimension )

#include <vx_nodes.h>

[Graph] Creates a Lucas Kanade Tracking Node.

Parameters

[in]	graph	The reference to the graph.
[in]	old_images	Input of first (old) image pyramid in `VX_DF_IMAGE_U8`.
[in]	new_images	Input of destination (new) image pyramid `VX_DF_IMAGE_U8`.
[in]	old_points	An array of key points in a `vx_array` of `VX_TYPE_KEYPOINT`; those key points are defined at the old_images high resolution pyramid.
[in]	new_points_estimates	An array of estimation on what is the output key points in a `vx_array` of `VX_TYPE_KEYPOINT`; those keypoints are defined at the new_images high resolution pyramid.
[out]	new_points	An output array of key points in a `vx_array` of `VX_TYPE_KEYPOINT`; those key points are defined at the new_images high resolution pyramid.
[in]	termination	The termination can be `VX_TERM_CRITERIA_ITERATIONS` or `VX_TERM_CRITERIA_EPSILON` or `VX_TERM_CRITERIA_BOTH`.
[in]	epsilon	The `vx_float32` error for terminating the algorithm.
[in]	num_iterations	The number of iterations. Use a `VX_TYPE_UINT32` scalar.
[in]	use_initial_estimate	Use a `VX_TYPE_BOOL` scalar.
[in]	window_dimension	The size of the window on which to perform the algorithm. See `VX_CONTEXT_OPTICAL_FLOW_MAX_WINDOW_DIMENSION`

Return values

vx_node A node reference. Any possible errors preventing a successful creation should be checked using vxGetStatus

VX_API_ENTRY vx_status VX_API_CALL vxuOpticalFlowPyrLK	(	vx_context	context,
		vx_pyramid	old_images,
		vx_pyramid	new_images,
		vx_array	old_points,
		vx_array	new_points_estimates,
		vx_array	new_points,
		vx_enum	termination,
		vx_scalar	epsilon,
		vx_scalar	num_iterations,
		vx_scalar	use_initial_estimate,
		vx_size	window_dimension )

#include <vxu.h>

[Immediate] Computes an optical flow on two images.

Parameters

[in]	context	The reference to the overall context.
[in]	old_images	Input of first (old) image pyramid in `VX_DF_IMAGE_U8`.
[in]	new_images	Input of destination (new) image pyramid in `VX_DF_IMAGE_U8`
[in]	old_points	an array of key points in a vx_array of `VX_TYPE_KEYPOINT` those key points are defined at the old_images high resolution pyramid
[in]	new_points_estimates	an array of estimation on what is the output key points in a `vx_array` of `VX_TYPE_KEYPOINT` those keypoints are defined at the new_images high resolution pyramid
[out]	new_points	an output array of key points in a `vx_array` of `VX_TYPE_KEYPOINT` those key points are defined at the new_images high resolution pyramid
[in]	termination	termination can be `VX_TERM_CRITERIA_ITERATIONS` or `VX_TERM_CRITERIA_EPSILON` or `VX_TERM_CRITERIA_BOTH`
[in]	epsilon	is the `vx_float32` error for terminating the algorithm
[in]	num_iterations	is the number of iterations. Use a `VX_TYPE_UINT32` scalar.
[in]	use_initial_estimate	Can be set to either `vx_false_e` or `vx_true_e`.
[in]	window_dimension	The size of the window on which to perform the algorithm. See `VX_CONTEXT_OPTICAL_FLOW_MAX_WINDOW_DIMENSION`

Return values

VX_SUCCESS	Success
*	An error occurred. See `vx_status_e`.