Nvidia Corporation

Eric Viscito

Zoran Nikolic

Minwoo Park

Niranjan Avadhanam

Sangmin Oh

Junghyun Kwon

Jagadeesh Sankaran

Tae Eun Choe

Branislav Kisacanin

Dong Zhang

Baris Evrim Demiroz

Thrinadh Kottana

Varun Allagadapa

Yongqing Liang

Eric Kangning Zhang

Chethan Ningaraju

Hao Tsui

In various examples, techniques for using hardware feature trackers in autonomous or semi-autonomous systems are described. Systems and methods are disclosed that use a processor(s) to determine flow vectors associated with pixel locations in a first image. The systems also use the processor(s) to determine a location of a feature point in a second image based at least on one or more of the flow vectors and a subpixel location of the feature point in the first image. In some examples, the processor(s) may include an optical flow accelerator (OFA) that includes a hardware unit storing a lookup table that is used to determine the location of the feature point in the second image. In some examples, the processor(s) may include an OFA to determine the flow vectors and a vision processor to determine the location of the feature point in the second image.

Hardware-based feature tracker for autonomous systems and applications

Apparatuses, systems, and techniques to generate one or more confidence values associated with one or more objects identified by one or more neural networks. In at least one embodiment, one or more confidence values associated with one or more objects identified by one or more neural networks are generated based on, for example, one or more neural network outputs.

Confidence generation using a neural network

A geometric approach may be used to detect objects on a road surface. A set of points within a region of interest between a first frame and a second frame are captured and tracked to determine a difference in location between the set of points in two frames. The first frame may be aligned with the second frame and the first pixel values of the first frame may be compared with the second pixel values of the second frame to generate a disparity image including third pixels. One or more subsets of the third pixels that have a value above a first threshold may be combined, and the third pixels may be scored and associated with disparity values for each pixel of the one or more subsets of the third pixels. A bounding shape may be generated based on the scoring.

Object detection using image alignment for autonomous machine applications

Embodiments of the present invention are directed to methods and systems for performing automatic noise reduction in video. According to one aspect of the invention, a video noise-reducing system is provided consisting of a noise estimator, a motion classifier, two stages of filters, each including a spatial and temporal filter, and a combiner. The system adapts to noise level and to scene content to find at each location in the image a balance of noise reduction and detail preservation. Temporal Infinite Impulse Response (IIR) filtering provides a high level of detail-preserving noise reduction where motion allows, while non linear spatial filtering provides edge-preserving noise reduction in areas where the temporal filter would introduce motion artifacts. A spatial-temporal combiner provides smooth transition and balance between the two filtering modes; this block also enables use of external cues to produce a visually pleasing output based on ambient conditions.

Pre-processing for video noise reduction

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Shelburne, CA, United States of America

Eric Viscito