Data Structures
struct	VPIHarrisKeypointDetectorParams
	Structure that defines the parameters for vpiSubmitHarrisKeypointDetector. More...

Functions
VPIStatus	vpiCreateHarrisKeypointDetector (VPIStream stream, uint32_t inputWidth, uint32_t inputHeight, VPIPayload *payload)
	Creates a Harris Keypoint Detector payload. More...

VPIStatus	vpiSubmitHarrisKeypointDetector (VPIPayload payload, VPIImage input, VPIArray outFeatures, VPIArray outScores, const VPIHarrisKeypointDetectorParams *params)
	Submits Harris Keypoint Detector operation to the stream associated with the payload. More...

Detailed Description

Detect Harris keypoints

Data Structure Documentation

struct VPIHarrisKeypointDetectorParams

Structure that defines the parameters for vpiSubmitHarrisKeypointDetector.

Definition at line 80 of file HarrisKeypointDetector.h.

Collaboration diagram for VPIHarrisKeypointDetectorParams:

Data Fields
uint32_t	blockSize	Block window size used to compute the Harris Corner score. Must be 3, 5 or 7.
uint32_t	gradientSize	Gradient window size. Must be 3, 5 or 7.
float	minNMSDistance	Non-maximum suppression radius, set to 0 to disable it. For PVA backend, this must be set to 8.
float	sensitivity	Specifies sensitivity threshold from the Harris-Stephens equation.
float	strengthThresh	Specifies the minimum threshold with which to eliminate Harris Corner scores.

VPIStatus vpiCreateHarrisKeypointDetector	(	VPIStream	stream,
		uint32_t	inputWidth,
		uint32_t	inputHeight,
		VPIPayload *	payload
	)

This function allocates all temporary memory needed by the algorithm.

Parameters

stream	[in] VPI stream to be used.
inputWidth,inputHeight	[in] Dimensions of the input image that will be used with this payload.
payload	[out] Pointer to a payload handle that will point to the created payload.

Returns: VPI_SUCCESS if payload was created successfully, some other VPIStatus value in case of error.

VPIStatus vpiSubmitHarrisKeypointDetector	(	VPIPayload	payload,
		VPIImage	input,
		VPIArray	outFeatures,
		VPIArray	outScores,
		const VPIHarrisKeypointDetectorParams *	params
	)

Submits Harris Keypoint Detector operation to the stream associated with the payload.

Parameters

payload	[in] Payload to be submitted.
input	[in] Input image from where the Harris keypoints will be extracted.
outFeatures	[out] Array that will receive the detected keypoints. It must have type VPI_ARRAY_TYPE_KEYPOINT.
outScores	[out] Array that will receive the keypoints' scores. It must have type VPI_ARRAY_TYPE_U32.
params	[in] Pointer to a VPIHarrisKeypointDetectorParams with parameters for this algorithm invocation. These parameters can vary in every call and will be copied internally, no need to keep the object around.

Returns: VPI_SUCCESS if the algorithm submitted was created successfully, some other VPIStatus value in case of error. Even if VPI_SUCCESS is returned, the actual algorithm execution might still fail, due to invalid parameters. The actual error will only be returned by some synchronization call or another algorithm submission.