Interoperability with OpenCV library. More...

Functions
VPIStatus	vpiImageCreateWrapperOpenCVMat (const cv::Mat &mat, VPIImageFormat fmt, uint64_t flags, VPIImage *img)
	Wraps a `cv::Mat` in an VPIImage with the given image format. More...

VPIStatus	vpiImageCreateWrapperOpenCVMat (const cv::Mat &mat, uint64_t flags, VPIImage *img)
	Wraps a `cv::Mat` in a VPIImage and infers the image format from its type. More...

VPIStatus	vpiImageSetWrappedOpenCVMat (VPIImage img, const cv::Mat &mat)
	Redefines the wrapped `cv::Mat` of an existing VPIImage wrapper. More...

VPIStatus	vpiImageCreateWrapperOpenCVMatPlanes (const std::vector< cv::Mat > &matPlanes, VPIImageFormat fmt, uint64_t flags, VPIImage *img)
	Wraps a vector of `cv::Mat`s in a VPIImage, each `cv::Mat` representing one image plane. More...

VPIStatus	vpiImageSetWrappedOpenCVMatPlanes (VPIImage img, const std::vector< cv::Mat > &matPlanes)
	Replaces the wrapped `cv::Mat` planes with new ones. More...

VPIStatus	vpiImageDataExportOpenCVMat (const VPIImageData &imgData, cv::Mat *mat)
	Fills an existing `cv::Mat` with data from VPIImageData coming from a locked VPIImage. More...

VPIStatus	vpiImageDataExportOpenCVMatPlanes (const VPIImageData &imgData, std::vector< cv::Mat > *matPlanes)
	Fills a vector of `cv::Mat` with all planes from VPIImageData. More...

VPIStatus	vpiImageDataImportOpenCVMat (const cv::Mat &mat, VPIImageData *imgData)
	Fills an existing VPIImageData with data from given `cv::Mat`. More...

VPIStatus	vpiImageDataImportOpenCVMat (const cv::Mat &mat, VPIImageFormat fmt, VPIImageData *imgData)
	Fills an existing VPIImageData with data from given `cv::Mat`, forcing the given image format. More...

VPIStatus	vpiImageDataImportOpenCVMatPlanes (const std::vector< cv::Mat > &matPlanes, VPIImageFormat fmt, VPIImageData *imgData)
	Fills a vector of `cv::Mat` describing all planes from given VPIImageData forcing the given image format. More...

Detailed Description

Interoperability with OpenCV library.

VPI allows easy interoperability with OpenCV. This makes it easy to wrap existing cv::Mat object into VPIImage to be used in VPI pipelines.

It's also possible to create a cv::Mat out of a VPIImageData.

Function Documentation

◆ vpiImageCreateWrapperOpenCVMat() [1/2]

VPIStatus vpiImageCreateWrapperOpenCVMat	(	const cv::Mat &	mat,
		VPIImageFormat	fmt,
		uint64_t	flags,
		VPIImage *	img
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Wraps a cv::Mat in an VPIImage with the given image format.

It also wraps YUV images in 4:2:2 (packed and semi-planar) and 4:2:0 (semi-planar) formats that are understood by cv::cvtColor.

The cv::Mat must not be destroyed while there's a VPIImage still wrapping it. Failure to do so leads to undefined behavior.

Parameters

[in]	mat	The OpenCV matrix to be wrapped. Must not be empty. Number of dimensions must be 2.
[in]	fmt	The image format associated with `mat`. Format must be consistent with `mat` dimensions and type.
[in]	flags	Bit field specifying the desired characteristics of the image. VPI_BACKEND_CPU flag is always added internally. The field must be a combination of zero or more of the following flags: VPIBackend flags. This image can be used in algorithms running in these backends. If no backend flags are passed, it'll consider all backends supported by the active VPIContext, but disable the backends that are incompatible with the given image parameters. Common object flags. If backends are given, they must enabled in current context.
[out]	img	Pointer to memory that will receive the created image handle.

Return values

VPI_ERROR_INVALID_IMAGE_FORMAT	`fmt` is invalid or inconsistent with `mat`.
VPI_ERROR_INVALID_ARGUMENT	`mat` is empty or has wrong number of dimensions.
VPI_ERROR_INVALID_ARGUMENT	Output `img` is NULL.
VPI_ERROR_OUT_OF_MEMORY	Not enough resources to create image.
VPI_ERROR_INVALID_CONTEXT	Current context is destroyed.
VPI_ERROR_INVALID_OPERATION	Requested backend isn't enabled in current context.
VPI_SUCCESS	Operation executed successfully.

Definition at line 117 of file OpenCVInterop.hpp.

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◆ vpiImageCreateWrapperOpenCVMat() [2/2]

VPIStatus vpiImageCreateWrapperOpenCVMat	(	const cv::Mat &	mat,
		uint64_t	flags,
		VPIImage *	img
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Wraps a cv::Mat in a VPIImage and infers the image format from its type.

The rules to infer the image type are:

unsigned and float 3-channel images are taken to be BGR
unsigned and float 4-channel images are taken to be BGRA
other types are mapped to non-color vpi image formats with the same pixel layout.

The cv::Mat must not be destroyed while there's a VPIImage still wrapping it. Failure to do so leads to undefined behavior.

Parameters

[in]	mat	The OpenCV matrix to be wrapped. Number of dimensions must be 2.
[in]	flags	Bit field specifying the desired characteristics of the image. VPI_BACKEND_CPU flag is always added internally. The field must be a combination of zero or more of the following flags: VPIBackend flags. This image can be used in algorithms running in these backends. If no backend flags are passed, it'll consider all backends supported by the active VPIContext, but disable the backends that are incompatible with the given image parameters. Common object flags If backends are given, they must enabled in current context.
[out]	img	Pointer to memory that will receive the created image handle.

Return values

VPI_ERROR_INVALID_IMAGE_FORMAT	`mat` type is not supported.
VPI_ERROR_INVALID_ARGUMENT	`mat` is empty or has wrong number of dimensions.
VPI_ERROR_INVALID_ARGUMENT	Output `img` is NULL.
VPI_ERROR_OUT_OF_MEMORY	Not enough resources to create image.
VPI_ERROR_INVALID_CONTEXT	Current context is destroyed.
VPI_ERROR_INVALID_OPERATION	Requested backend isn't enabled in current context.
VPI_SUCCESS	Operation executed successfully.

Definition at line 166 of file OpenCVInterop.hpp.

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◆ vpiImageSetWrappedOpenCVMat()

VPIStatus vpiImageSetWrappedOpenCVMat	(	VPIImage	img,
		const cv::Mat &	mat
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Redefines the wrapped cv::Mat of an existing VPIImage wrapper.

The new cv::Mat must have the same characteristics (type and dimensions) of the existing cv::Mat being wrapped.

This operation is efficient and does not allocate memory. The wrapped memory will be accessible to the same backends specified during wrapper creation.

The wrapped cv::Mat must be valid while it's still being wrapped.

Parameters

[in]	img	Handle to an image. Must have been created by vpiImageCreateWrapperOpenCVMat or vpiImageCreateWrapper and buffer type VPI_IMAGE_BUFFER_HOST_PITCH_LINEAR. Image must not be locked.
[in]	mat	`cv::Mat` object to be wrapped. Number of dimensions must be 2. The existing wrapped image and `mat` must have same dimensions and compatible formats.

Return values

VPI_ERROR_INVALID_ARGUMENT	`mat` is empty or has wrong number of dimensions.
VPI_ERROR_INVALID_ARGUMENT	Output `img` is NULL.
VPI_ERROR_INVALID_IMAGE_FORMAT	`mat` type is not supported.
VPI_ERROR_INVALID_OPERATION	`mat` dimensions and/or format don't match `img`.
VPI_ERROR_INVALID_OPERATION	`img` is locked.
VPI_ERROR_INVALID_OPERATION	`img` is not created by vpiImageCreateWrapperOpenCVMat or vpiImageCreateWrapper with correct buffer type.
VPI_SUCCESS	Operation executed successfully.

Definition at line 207 of file OpenCVInterop.hpp.

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◆ vpiImageCreateWrapperOpenCVMatPlanes()

VPIStatus vpiImageCreateWrapperOpenCVMatPlanes	(	const std::vector< cv::Mat > &	matPlanes,
		VPIImageFormat	fmt,
		uint64_t	flags,
		VPIImage *	img
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Wraps a vector of cv::Mats in a VPIImage, each cv::Mat representing one image plane.

The wrapped cv::Mats must not be destroyed while there's a VPIImage still wrapping it. The std::vector object itself isn't used so it can be destroyed, or even be temporary. Failure to keep cv::Mats allocated leads to undefined behavior.

Parameters

[in]	matPlanes	Vector of `cv::Mat`, each one representing one image plane. Vector can't be empty. `cv::Mat` in each plane must not be empty. `cv::Mat` dimensions must be 2.
[in]	fmt	The image format associated with `matPlanes`. Format must be consistent with `matPlanes`. Namely, the number of planes in `fmt` must match `matPlanes` size, and each plane must be consistent with corresponding `cv::Mat` type.
[in]	flags	Bit field specifying the desired characteristics of the image. VPI_BACKEND_CPU flag is always added internally. The field must be a combination of zero or more of the following flags: VPIBackend flags. This image can be used in algorithms running in these backends. If no backend flags are passed, it'll consider all backends supported by the active VPIContext, but disable the backends that are incompatible with the given image parameters. Common object flags If backends are given, they must enabled in current context.
[out]	img	Pointer to memory that will receive the created image handle.

Return values

VPI_ERROR_INVALID_IMAGE_FORMAT	`fmt` is not supported.
VPI_ERROR_INVALID_IMAGE_FORMAT	`matPlanes` type not consistent with `fmt`.
VPI_ERROR_INVALID_ARGUMENT	Some `cv::Mat` in `matPlanes` is empty, or matPlanes is empty.
VPI_ERROR_INVALID_OPERATION	Requested backend isn't enabled in current context.
VPI_SUCCESS	Operation executed successfully.

Definition at line 263 of file OpenCVInterop.hpp.

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◆ vpiImageSetWrappedOpenCVMatPlanes()

VPIStatus vpiImageSetWrappedOpenCVMatPlanes	(	VPIImage	img,
		const std::vector< cv::Mat > &	matPlanes
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Replaces the wrapped cv::Mat planes with new ones.

The new cv::Mat vector must have the same size, and contained cv::Mats must have the same characteristics (type and dimensions) of the existing cv::Mats being wrapped.

The VPIImage must have been created by vpiImageCreateWrapperOpenCVMatPlanes.

This operation is efficient and does not allocate memory. The wrapped memory will be accessible to the same backends specified during wrapper creation.

The wrapped cv::Mats must be valid while it's still being wrapped. The std::vector object itself can be destroyed, or even be temporary.

Parameters

[in]	img	Handle to an image. Must have been created by vpiImageCreateWrapperOpenCVMat or vpiImageCreateWrapper with buffer type VPI_IMAGE_BUFFER_HOST_PITCH_LINEAR.
[in]	matPlanes	Vector of `cv::Mat`, each one representing one image plane.

Return values

VPI_ERROR_INVALID_IMAGE_FORMAT	Image format is not supported.
VPI_ERROR_INVALID_ARGUMENT	Input `matPlanes` is NULL.
VPI_ERROR_INVALID_ARGUMENT	Input `imgData` is NULL.
VPI_ERROR_INVALID_OPERATION	`img` is not created by vpiImageCreateWrapperOpenCVMat or vpiImageCreateWrapper with correct buffer type.
VPI_SUCCESS	Operation executed successfully.

Definition at line 304 of file OpenCVInterop.hpp.

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◆ vpiImageDataExportOpenCVMat()

VPIStatus vpiImageDataExportOpenCVMat	(	const VPIImageData &	imgData,
		cv::Mat *	mat
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Fills an existing cv::Mat with data from VPIImageData coming from a locked VPIImage.

No image contents will be copied, they're just referenced by cv::Mat. The result can be used in OpenCV operations.

If imgData has 2 or 3 planes that are contiguous in memory and represent some multi-planar formats as understood by cv::cvtColor such as NV12 or YUV422, the resulting mat will be filled so that cv::cvtColor understand it as having these types. In other works, they can be used with cv::COLOR_YUV2RGB_NV12 or COLOR_YUV2RGB_UYVY.

Parameters

[in]	imgData	Reference to VPIImageData returned by vpiImageLockData. If the pixel type of a plane is VPI_PIXEL_TYPE_DEFAULT, it'll be inferred from the image format given. Image format must be representable by a `cv::Mat`.
[out]	mat	`cv::Mat` that will refer to imgData contents. Mandatory, can't be NULL.

Return values

VPI_ERROR_INVALID_ARGUMENT	Output `mat` is NULL.
VPI_ERROR_INVALID_IMAGE_FORMAT	`imgData` is invalid.
VPI_SUCCESS	Operation executed successfully.

Definition at line 346 of file OpenCVInterop.hpp.

◆ vpiImageDataExportOpenCVMatPlanes()

VPIStatus vpiImageDataExportOpenCVMatPlanes	(	const VPIImageData &	imgData,
		std::vector< cv::Mat > *	matPlanes
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Fills a vector of cv::Mat with all planes from VPIImageData.

No image contents will be copied, they're just referenced by cv::Mat. The result can be used in OpenCV operations.

Parameters

[in]	imgData	Reference to VPIImageData returned by vpiImageLockData. If the pixel type of a plane is VPI_PIXEL_TYPE_DEFAULT, it'll be inferred from the image format given. Image format must be representable by a list of `cv::Mat`s, one per plane. The buffer type must be VPI_IMAGE_BUFFER_HOST_PITCH_LINEAR .
[out]	matPlanes	Vector of `cv::Mat`, each one wrapping one image plane in imgData. Mandatory, can't be NULL.

Return values

VPI_ERROR_INVALID_ARGUMENT	Output `matPlanes` is NULL.
VPI_ERROR_INVALID_IMAGE_FORMAT	`imgData` is invalid.
VPI_SUCCESS	Operation executed successfully.

Definition at line 375 of file OpenCVInterop.hpp.

◆ vpiImageDataImportOpenCVMat() [1/2]

VPIStatus vpiImageDataImportOpenCVMat	(	const cv::Mat &	mat,
		VPIImageData *	imgData
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Fills an existing VPIImageData with data from given cv::Mat.

It performs the inverse operation of vpiImageDataExportOpenCVMat. Please refer to this function's description on what is the criteria used for image format deduction.

Parameters

[in]	mat	Reference to `cv::Mat` with information to be filled in output It must not be empty. `cv::Mat` number of dimensions equal to 2.
[out]	imgData	VPIImageData that will be filled. Existing contents are discarded. Mandatory, must not be NULL.

Return values

VPI_ERROR_INVALID_ARGUMENT	Input `mat` is empty.
VPI_ERROR_INVALID_ARGUMENT	`mat` has wrong number of dimensions.
VPI_ERROR_INVALID_ARGUMENT	`imgData` is NULL.
VPI_SUCCESS	Operation executed successfully.

Definition at line 405 of file OpenCVInterop.hpp.

◆ vpiImageDataImportOpenCVMat() [2/2]

VPIStatus vpiImageDataImportOpenCVMat	(	const cv::Mat &	mat,
		VPIImageFormat	fmt,
		VPIImageData *	imgData
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Fills an existing VPIImageData with data from given cv::Mat, forcing the given image format.

It performs the inverse operation of vpiImageDataExportOpenCVMat. Please refer to this function's description on what is the criteria used for image format deduction.

Parameters

[in]	mat	Reference to `cv::Mat` with information to be filled in output It must not be empty. `cv::Mat` number of dimensions equal to 2.
[in]	fmt	The image format associated with mat. It must be consistent with `mat` dimesions and type.
[out]	imgData	VPIImageData that will be filled. Existing contents are discarded. Mandatory, must not be NULL.

Return values

VPI_ERROR_INVALID_ARGUMENT	Input `mat` is empty.
VPI_ERROR_INVALID_ARGUMENT	`imgData` is NULL.
VPI_ERROR_INVALID_ARGUMENT	`mat` has wrong number of dimensions.
VPI_ERROR_INVALID_IMAGE_FORMAT	`fmt` not consistent with `mat`.
VPI_SUCCESS	Operation executed successfully.

Definition at line 440 of file OpenCVInterop.hpp.

◆ vpiImageDataImportOpenCVMatPlanes()

VPIStatus vpiImageDataImportOpenCVMatPlanes	(	const std::vector< cv::Mat > &	matPlanes,
		VPIImageFormat	fmt,
		VPIImageData *	imgData
	)

inline

#include </opt/nvidia/vpi2/include/vpi/OpenCVInterop.hpp>

Fills a vector of cv::Mat describing all planes from given VPIImageData forcing the given image format.

It performs the inverse operation of vpiImageDataExportOpenCVMatPlanes. Please refer to this function's description on what is the criteria used for image format deduction.

The image format isn't deduced from the input cv::Mat, but is given by the user. If the format isn't compatible with the cv::Mat, an error is returned.

Parameters

[in]	matPlanes	Vector of `cv::Mat`, each describing one plane. It must not be empty. `cv::Mat` in each plane must not be empty. `cv::Mat` in each plane must have number of dimensions equal to 2.
[in]	fmt	The image format associated with matPlanes. It must be consistent with the `matPlanes` size and the contained `cv::Mat`'s dimensions and type.
[out]	imgData	VPIImageData that will be filled. Existing contents are discarded. Mandatory, must not be NULL.

Return values

VPI_ERROR_INVALID_ARGUMENT	`imgData` is NULL.
VPI_ERROR_INVALID_ARGUMENT	`matPlanes` is empty.
VPI_ERROR_INVALID_ARGUMENT	Some `cv::Mat` in `matPlanes` is empty or has wrong number of dimensions.
VPI_ERROR_INVALID_IMAGE_FORMAT	`fmt` not consistent with `matPlanes`.
VPI_SUCCESS	Operation executed successfully.

Definition at line 480 of file OpenCVInterop.hpp.

VPI - Vision Programming Interface

2.3 Release

Functions

Detailed Description

Function Documentation

◆ vpiImageCreateWrapperOpenCVMat() [1/2]

◆ vpiImageCreateWrapperOpenCVMat() [2/2]

◆ vpiImageSetWrappedOpenCVMat()

◆ vpiImageCreateWrapperOpenCVMatPlanes()

◆ vpiImageSetWrappedOpenCVMatPlanes()

◆ vpiImageDataExportOpenCVMat()

◆ vpiImageDataExportOpenCVMatPlanes()

◆ vpiImageDataImportOpenCVMat() [1/2]

◆ vpiImageDataImportOpenCVMat() [2/2]

◆ vpiImageDataImportOpenCVMatPlanes()