Function cvcudaWarpPerspectiveSubmit
Defined in File OpWarpPerspective.h
Function Documentation
-
NVCVStatus cvcudaWarpPerspectiveSubmit(NVCVOperatorHandle handle, cudaStream_t stream, NVCVTensorHandle in, NVCVTensorHandle out, const NVCVPerspectiveTransform transMatrix, const int32_t flags, const NVCVBorderType borderMode, const float4 borderValue)
Executes the WarpPerspective operation on the given cuda stream. This operation does not wait for completion.
Applies an perspective transformation to an image. outputs(x,y) = saturate_cast<out_type>(input(transform(x,y))) where transform() is the linear transformation operator (matrix)
Limitations:
Input: Data Layout: [kNHWC, kHWC] Channels: [1,3,4]
Data Type
Allowed
8bit Unsigned
Yes
8bit Signed
No
16bit Unsigned
Yes
16bit Signed
Yes
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
Yes
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 | No Height | No
- 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.
transMatrix – [in] 3x3 perspective transformation matrix.
flags – [in] Combination of interpolation methods(NVCV_INTERP_NEAREST, NVCV_INTERP_LINEAR or NVCV_INTERP_CUBIC) and the optional flag NVCV_WARP_INVERSE_MAP, that sets trans_matrix as the inverse transformation.
borderMode – [in] pixel extrapolation method (NVCV_BORDER_CONSTANT or NVCV_BORDER_REPLICATE).
borderValue – [in] Used to specify values for a constant border for each color chanel i.e. If ARGB this would contain the values for Alpha, Red, Green, Blue channels.
- 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.