Laplacian
- group NVCV_C_ALGORITHM_LAPLACIAN
Functions
-
NVCVStatus cvcudaLaplacianCreate(NVCVOperatorHandle *handle)
Constructs an instance of the Laplacian.
- Parameters:
handle – [out] Where the operator instance handle will be written to.
Must not be NULL.
- Return values:
NVCV_ERROR_INVALID_ARGUMENT – Handle is null.
NVCV_ERROR_OUT_OF_MEMORY – Not enough memory to create the operator.
NVCV_SUCCESS – Operation executed successfully.
-
NVCVStatus cvcudaLaplacianSubmit(NVCVOperatorHandle handle, cudaStream_t stream, NVCVTensorHandle in, NVCVTensorHandle out, int32_t ksize, float scale, NVCVBorderType borderMode)
Executes the Laplacian operation on the given cuda stream. This operation does not wait for completion.
Limitations:
Input: Data Layout: [kNHWC, kHWC] Channels: [1, 3, 4]
Data Type
Allowed
8bit Unsigned
Yes
8bit Signed
No
16bit Unsigned
Yes
16bit Signed
No
32bit Unsigned
No
32bit Signed
No
32bit Float
Yes
64bit Float
No
Output: Data Layout: [kNHWC, kHWC] Channels: [1, 3, 4]
Data Type
Allowed
8bit Unsigned
Yes
8bit Signed
No
16bit Unsigned
Yes
16bit Signed
No
32bit Unsigned
No
32bit Signed
No
32bit Float
Yes
64bit Float
No
Input/Output dependency
Property | Input == Output -------------- | ------------- Data Layout | Yes Data Type | Yes Number | Yes Channels | Yes Width | Yes Height | Yes
- Parameters:
handle – [in] Handle to the operator.
Must not be NULL.
stream – [in] Handle to a valid CUDA stream.
in – [in] Input tensor.
out – [out] Output tensor.
ksize – [in] Aperture size used to compute the second-derivative filters, it can be 1 or 3.
scale – [in] Scale factor for the Laplacian values (use 1 for no scale).
borderMode – [in] Border mode to be used when accessing elements outside input image, cf.
NVCVBorderType
.
- Return values:
NVCV_ERROR_INVALID_ARGUMENT – Some parameter is outside valid range.
NVCV_ERROR_INTERNAL – Internal error in the operator, invalid types passed in.
NVCV_SUCCESS – Operation executed successfully.
-
NVCVStatus cvcudaLaplacianVarShapeSubmit(NVCVOperatorHandle handle, cudaStream_t stream, NVCVImageBatchHandle in, NVCVImageBatchHandle out, NVCVTensorHandle ksize, NVCVTensorHandle scale, NVCVBorderType borderMode)
Executes the Laplacian operation on a batch of images.
- Parameters:
in – [in] Input image batch.
out – [out] Output image batch.
ksize – [in] Aperture size to compute second-derivative filters, either 1 or 3 per image, as a 1D Tensor of int.
Must be of pixel type NVCV_DATA_TYPE_S32
scale – [in] Scale factor Laplacian values as a 1D Tensor of float.
Must be of pixel type NVCV_DATA_TYPE_F32
borderMode – [in] Border mode to be used when accessing elements outside input image, cf.
NVCVBorderType
.
-
NVCVStatus cvcudaLaplacianCreate(NVCVOperatorHandle *handle)