Algorithms

The algorithms supported by VPI are described in the following sections. An overview of the algorithm, instructions on how to use the algorithm, a list of any backend limitations, and the API reference are provided.

Algorithm	Backend Support
	CPU	CUDA	PVA1	VIC2	NVENC2
Box Filter	yes	yes	yes	no	no
Bilateral Filter	yes	yes	no	no	no
Gaussian Filter	yes	yes	yes	no	no
Gaussian Pyramid Generator	yes	yes	yes	no	no
Laplacian Pyramid Generator	yes	yes	no	no	no
Convolution	yes	yes	yes	no	no
Separable Convolution	yes	yes	yes	no	no
Convert Image Format	yes	yes	no	yes	no
Rescale	yes	yes	no	yes	no
Remap	yes	yes	no	yes1	no
Perspective Warp	yes	yes	no	yes1	no
FFT	yes	yes	no	no	no
Inverse FFT	yes	yes	no	no	no
Lens Distortion Correction	yes	yes	no	yes1	no
Stereo Disparity Estimator	yes	yes	yes	no	no
KLT Feature Tracker	yes	yes	yes	no	no
Harris Corner Detector	yes	yes	yes	no	no
Temporal Noise Reduction	no	yes	no	yes	no
Pyramidal LK Optical Flow	yes	yes	no	no	no
Dense Optical Flow	no	no	no	no	yes1
Image Histogram	yes	yes	no	no	no
Equalize Histogram	yes	yes	no	no	no
Background Subtractor	yes	yes	no	no	no

¹Only available on Jetson Xavier NX and Jetson AGX Xavier series.
²Only available on Jetson platforms.