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公开(公告)号：US09747527B2
公开(公告)日：2017-08-29
申请号：US14029633
申请日：2013-09-17
申请人： NVIDIA CORPORATION
CPC分类号： G06K9/6285 , G06K9/00986 , G06K9/6256 , G06K9/6282
摘要： In one embodiment of the present invention, a graphics processing unit (GPU) is configured to detect an object in an image using a random forest classifier that includes multiple, identically structured decision trees. Notably, the application of each of the decision trees is independent of the application of the other decision trees. In operation, the GPU partitions the image into subsets of pixels, and associates an execution thread with each of the pixels in the subset of pixels. The GPU then causes each of the execution threads to apply the random forest classifier to the associated pixel, thereby determining a likelihood that the pixel corresponds to the object. Advantageously, such a distributed approach to object detection more fully leverages the parallel architecture of the PPU than conventional approaches. In particular, the PPU performs object detection more efficiently using the random forest classifier than using a cascaded classifier.
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2.发明申请ROBUST AUTOMATIC DETERMINATION AND LOCATION OF MACBETH COLOR CHECKER CHARTS 有权强大的自动测量和MACBETH颜色检查器的位置公开(公告)号：US20140286569A1
公开(公告)日：2014-09-25
申请号：US13849817
申请日：2013-03-25
申请人： NVIDIA CORPORATION
发明人： Goran Devic , Shalini Gupta
摘要： A MacBeth color checker chart automatic detection system includes an imaging unit that provides an image and a processing unit that applies an edge detection operation to the image and performs a flood-fill operation on the image to provide a flood-filled image. Additionally, the MacBeth color checker chart automatic detection system includes a testing unit that tests the flood-filled image to provide a modified flood-fill image, wherein a set of heuristic tests are employed to automatically determine quantity and location of MacBeth color checker charts. Generally, the set of heuristic tests are employed to automatically reject regions that are unlikely to belong to a MacBeth color checker chart and to cluster the remaining regions that are likely to belong to a Macbeth color checker chart. A MacBeth color checker chart automatic detection method is also provided.
摘要翻译： MacBeth色彩检查表自动检测系统包括提供图像的成像单元和对图像应用边缘检测操作并对图像执行洪水填充操作以提供充满洪水的图像的处理单元。 此外，MacBeth色彩检查表自动检测系统包括一个测试单元，用于测试洪水填充图像以提供修改的填充图像，其中采用一组启发式测试来自动确定MacBeth色彩检查图的数量和位置。 通常，使用一组启发式测试来自动拒绝不太可能属于MacBeth颜色检查器图表的区域，并对可能属于Macbeth颜色检查表的其余区域进行聚类。 还提供了MacBeth色彩检查表自动检测方法。
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公开(公告)号：US09870598B2
公开(公告)日：2018-01-16
申请号：US13956735
申请日：2013-08-01
申请人： NVIDIA Corporation
CPC分类号： G06T1/20 , G06K9/4661 , G06T5/002 , G06T5/50 , G06T2207/10016 , G06T2207/20004 , G06T2207/20182
摘要： A method of noise filter parameter adaptation, the method comprising receiving a current video frame comprising a plurality of pixels. A table lookup is performed, using current statistical values associated with the current video frame. Noise filter parameters are adapted, based on current lighting conditions as determined from the performed table lookup. The current lighting conditions correspond to the current statistical values. The current video frame is noise filtered as defined by the adapted noise filter parameters.
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公开(公告)号：US10311589B2
公开(公告)日：2019-06-04
申请号：US15823370
申请日：2017-11-27
申请人： NVIDIA Corporation
摘要： One embodiment of the present invention sets forth a technique for estimating a head pose of a user. The technique includes acquiring depth data associated with a head of the user and initializing each particle included in a set of particles with a different candidate head pose. The technique further includes performing one or more optimization passes that include performing at least one iterative closest point (ICP) iteration for each particle and performing at least one particle swarm optimization (PSO) iteration. Each ICP iteration includes rendering the three-dimensional reference model based on the candidate head pose associated with the particle and comparing the three-dimensional reference model to the depth data. Each PSO iteration comprises updating a global best head pose associated with the set of particles and modifying at least one candidate head pose. The technique further includes modifying a shape of the three-dimensional reference model based on depth data.
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公开(公告)号：US10481696B2
公开(公告)日：2019-11-19
申请号：US15060545
申请日：2016-03-03
申请人： NVIDIA Corporation
发明人： Pavlo Molchanov , Shalini Gupta , Kihwan Kim , Kari Pulli
IPC分类号： G06F3/01 , G01S13/42 , G01S7/35 , G01S7/41 , G01S13/58 , G06K9/00 , G06K9/62 , G06K9/78 , B60R11/04 , G06N3/04 , G06N3/08
摘要： An apparatus and method for radar based gesture detection. The apparatus includes a processing element and a transmitter configured to transmit radar signals. The transmitter is coupled to the processing element. The apparatus further includes a plurality of receivers configured to receive radar signal reflections, where the plurality of receivers is coupled to the processing element. The transmitter and plurality of receivers are configured for short range radar and the processing element is configured to detect a hand gesture based on the radar signal reflections received by the plurality of receivers.
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公开(公告)号：US10168785B2
公开(公告)日：2019-01-01
申请号：US15060525
申请日：2016-03-03
申请人： NVIDIA Corporation
发明人： Pavlo Molchanov , Shalini Gupta , Kihwan Kim , Kari Pulli
IPC分类号： G06F3/01 , G01S13/42 , G01S7/35 , G01S7/41 , G01S13/58 , B60R11/04 , G06K9/00 , G06K9/62 , G06K9/78 , G06N3/04 , G06N3/08
摘要： An apparatus and method for gesture detection and recognition. The apparatus includes a processing element, a radar sensor, a depth sensor, and an optical sensor. The radar sensor, the depth sensor, and the optical sensor are coupled to the processing element, and the radar sensor, the depth sensor, and the optical sensor are configured for short range gesture detection and recognition. The processing element is further configured to detect and recognize a hand gesture based on data acquired with the radar sensor, the depth sensor, and the optical sensor.
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公开(公告)号：US09971959B2
公开(公告)日：2018-05-15
申请号：US14029640
申请日：2013-09-17
申请人： NVIDIA CORPORATION
CPC分类号： G06K9/6285 , G06K9/00986 , G06K9/6256 , G06K9/6282
摘要： In one embodiment of the present invention, a graphics processing unit (GPU) is configured to detect an object in an image using a random forest classifier that includes multiple, identically structured decision trees. Notably, the application of each of the decision trees is independent of the application of the other decision trees. In operation, the GPU partitions the image into subsets of pixels, and associates an execution thread with each of the pixels in the subset of pixels. The GPU then causes each of the execution threads to apply the random forest classifier to the associated pixel, thereby determining a likelihood that the pixel corresponds to the object. Advantageously, such a distributed approach to object detection more fully leverages the parallel architecture of the parallel processing unit (PPU) than conventional approaches. In particular, the PPU performs object detection more efficiently using the random forest classifier than using a cascaded classifier.
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8.发明授权Robust automatic determination and location of MacBeth color checker charts 有权强大的自动确定和MacBeth色彩检查表的位置公开(公告)号：US09064314B2
公开(公告)日：2015-06-23
申请号：US13849817
申请日：2013-03-25
申请人： Nvidia Corporation
发明人： Goran Devic , Shalini Gupta
摘要： A MacBeth color checker chart automatic detection system includes an imaging unit that provides an image and a processing unit that applies an edge detection operation to the image and performs a flood-fill operation on the image to provide a flood-filled image. Additionally, the MacBeth color checker chart automatic detection system includes a testing unit that tests the flood-filled image to provide a modified flood-fill image, wherein a set of heuristic tests are employed to automatically determine quantity and location of MacBeth color checker charts. Generally, the set of heuristic tests are employed to automatically reject regions that are unlikely to belong to a MacBeth color checker chart and to cluster the remaining regions that are likely to belong to a Macbeth color checker chart. A MacBeth color checker chart automatic detection method is also provided.
摘要翻译： MacBeth色彩检查表自动检测系统包括提供图像的成像单元和对图像应用边缘检测操作并对图像执行洪水填充操作以提供充满洪水的图像的处理单元。 此外，MacBeth色彩检查表自动检测系统包括一个测试单元，用于测试洪水填充图像以提供修改的填充图像，其中采用一组启发式测试来自动确定MacBeth色彩检查图的数量和位置。 通常，使用一组启发式测试来自动拒绝不太可能属于MacBeth颜色检查器图表的区域，并对可能属于Macbeth颜色检查表的其余区域进行聚类。 还提供了MacBeth色彩检查表自动检测方法。
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公开(公告)号：US09830703B2
公开(公告)日：2017-11-28
申请号：US14825129
申请日：2015-08-12
申请人： NVIDIA CORPORATION
CPC分类号： G06T7/507 , G06K9/6276 , G06T7/251 , G06T7/277 , G06T7/70 , G06T7/75 , G06T7/77 , G06T2200/28 , G06T2207/10016 , G06T2207/10028 , G06T2207/30201
摘要： One embodiment of the present invention sets forth a technique for estimating a head pose of a user. The technique includes acquiring depth data associated with a head of the user and initializing each particle included in a set of particles with a different candidate head pose. The technique further includes performing one or more optimization passes that include performing at least one iterative closest point (ICP) iteration for each particle and performing at least one particle swarm optimization (PSO) iteration. Each ICP iteration includes rendering the three-dimensional reference model based on the candidate head pose associated with the particle and comparing the three-dimensional reference model to the depth data. Each PSO iteration comprises updating a global best head pose associated with the set of particles and modifying at least one candidate head pose. The technique further includes modifying a shape of the three-dimensional reference model based on depth data.
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