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公开(公告)号：US20200336272A1
公开(公告)日：2020-10-22
申请号：US16842662
申请日：2020-04-07
摘要： A multichannel data packer includes a plurality of two-input multiplexers and a controller. The plurality of two-input multiplexers is arranged in 2N rows and N columns in which N is an integer greater than 1. Each input of a multiplexer in a first column receives a respective bit stream of 2N channels of bit streams. Each respective bit stream includes a bit-stream length based on data in the bit stream. The multiplexers in a last column output 2N channels of packed bit streams each having a same bit-stream length. The controller controls the plurality of multiplexers so that the multiplexers in the last column output the 2N channels of bit streams that each has the same bit-stream length.
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公开(公告)号：US20200336155A1
公开(公告)日：2020-10-22
申请号：US16842682
申请日：2020-04-07
发明人： Ilia OVSIANNIKOV
摘要： A data compressor includes a zero-value remover, a zero bit mask generator and a non-zero values packer. The zero-value remover receives 2N bit streams of values and outputs 2N non-zero-value bit streams having zero values removed from each respective bit stream based on a selected granularity of compression for values contained in the bit streams. The zero bit mask generator receives the 2N bit streams of values and generates a zero bit mask corresponding to the selected granularity of compression. Each zero bit mask indicates a location of a zero value based on the selected granularity of compression. The non-zero values packer receives the 2N non-zero-value bit streams and forms at least one first group of packed non-zero values.
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公开(公告)号：US20200043196A1
公开(公告)日：2020-02-06
申请号：US16597846
申请日：2019-10-09
IPC分类号： G06T7/73
摘要： A Dynamic Vision Sensor (DVS) pose-estimation system includes a DVS, a transformation estimator, an inertial measurement unit (IMU) and a camera-pose estimator based on sensor fusion. The DVS detects DVS events and shapes frames based on a number of accumulated DVS events. The transformation estimator estimates a 3D transformation of the DVS camera based on an estimated depth and matches confidence-level values within a camera-projection model such that at least one of a plurality of DVS events detected during a first frame corresponds to a DVS event detected during a second subsequent frame. The IMU detects inertial movements of the DVS with respect to world coordinates between the first and second frames. The camera-pose estimator combines information from a change in a pose of the camera-projection model between the first frame and the second frame based on the estimated transformation and the detected inertial movements of the DVS.
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4.发明申请公开(公告)号：US20190020864A1
公开(公告)日：2019-01-17
申请号：US16134954
申请日：2018-09-18
IPC分类号： H04N13/254 , G01S7/486 , G01S17/10 , H04N5/3745 , H04N5/369 , H04N5/378
CPC分类号： H04N13/254 , G01S7/4863 , G01S17/10 , G01S17/89 , H04N5/3696 , H04N5/37455 , H04N5/378
摘要： A Time-of-Flight (TOF) technique is combined with analog amplitude modulation within each pixel in a pixel array using multiple Single Photon Avalanche Diodes (SPADs) in conjunction with a single Pinned Photo Diode (PPD) in each pixel. A SPAD may be shared among multiple neighboring pixels. The TOF information is added to the received light signal by the analog domain-based single-ended to differential converter inside the pixel itself. The spatial-temporal correlation among outputs of multiple, adjacent SPADs in a pixel is used to control the operation of the PPD to facilitate recording of TOF values and range of an object. Erroneous range measurements due to ambient light are prevented by stopping the charge transfer from the PPD—and, hence, recording a TOF value—only when two or more SPADs in the pixel are triggered within a pre-defined time interval. An autonomous navigation system with multi-SPAD pixels provides improved vision for drivers under difficult driving conditions.
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5.发明申请公开(公告)号：US20170064235A1
公开(公告)日：2017-03-02
申请号：US14960339
申请日：2015-12-04
CPC分类号： H04N5/2256 , G01S7/00 , G01S17/10 , G01S17/89 , G06T7/50 , H04N5/2226 , H04N5/3745 , H04N13/128 , H04N13/133 , H04N13/254 , H04N13/271
摘要： A method and a system are disclosed for detecting a depth of an object illuminated by at least one first light pulse. Detection of light reflected from the object illuminated by the at least one first light pulse by a first row of pixels of 2D pixel array is enabled for a first predetermined period of time in which the first row of pixels forms an epipolar line of a scanning line of a first light pulse. Enabling of the detection by the first row of pixels for the first predetermined period of time occurs a second predetermined period of time after a beginning of a pulse cycle T of the at least one first light pulse. Detection signals are generated corresponding to the detected light reflected from the object, and the generated detection signals are used to determine a depth of the object.
摘要翻译： 公开了一种用于检测被至少一个第一光脉冲照射的物体的深度的方法和系统。 通过2D像素阵列的第一行像素由至少一个第一光脉冲照射的物体的光的检测被启用第一预定时间段，其中第一行像素形成扫描线的核线 的第一个光脉冲。 在第一预定时段的第一行像素的检测使得能够在至少一个第一光脉冲的脉冲周期T开始之后的第二预定时间段内发生。 对应于从物体反射的检测光产生检测信号，并且所生成的检测信号用于确定物体的深度。
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公开(公告)号：US20150146089A1
公开(公告)日：2015-05-28
申请号：US14210369
申请日：2014-03-13
发明人： Ilia OVSIANNIKOV , Gregory M. WALIGORSKI , Deokha SHIN , Wang-Hyun KIM , Yibing M. WANG , Hongyu WANG
IPC分类号： H04N5/235
CPC分类号： H04N5/2353 , G01S17/89
摘要： Imaging systems, such as time-of-flight imaging systems, and methods with pixel sensitivity adjustments. An embodiment includes a method, comprising: for a plurality of pixels having a first output and a second output, measuring the first outputs and the second outputs in response to a demodulation signal; and adjusting the demodulation signal such that a combination of the first outputs is substantially similar to a combination of the second outputs.
摘要翻译： 成像系统，如飞行时间成像系统，以及具有像素灵敏度调整的方法。 实施例包括一种方法，包括：对于具有第一输出和第二输出的多个像素，响应于解调信号测量第一输出和第二输出; 以及调整所述解调信号，使得所述第一输出的组合基本上类似于所述第二输出的组合。
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公开(公告)号：US20220146683A1
公开(公告)日：2022-05-12
申请号：US17583190
申请日：2022-01-24
IPC分类号： G01S17/894 , H04N5/225 , H04N5/232 , G01N21/55 , G01S7/4865 , G01S7/481
摘要： An image sensor includes a time-resolving sensor and a processor. The time-resolving sensor outputs a first signal and a second signal pair in response detecting one or more photons that have been reflected from an object. A first ratio of a magnitude of the first signal to a sum of the magnitude of the first signal and a magnitude of the second signal is proportional to a time of flight of the one or more detected photons. A second ratio of the magnitude of the second signal to the sum of the magnitude of the first signal and the magnitude of the second signal is proportional to the time of flight of the one or more detected photons. The processor determines a surface reflectance of the object where the light pulse has been reflected based on the first signal and the second signal pair and may generate a grayscale image.
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公开(公告)号：US20210242880A1
公开(公告)日：2021-08-05
申请号：US17237038
申请日：2021-04-21
发明人： Ilia OVSIANNIKOV
摘要： A data compressor includes a zero-value remover, a zero bit mask generator and a non-zero values packer. The zero-value remover receives 2N bit streams of values and outputs 2N non-zero-value bit streams having zero values removed from each respective bit stream based on a selected granularity of compression for values contained in the bit streams. The zero bit mask generator receives the 2N bit streams of values and generates a zero bit mask corresponding to the selected granularity of compression. Each zero bit mask indicates a location of a zero value based on the selected granularity of compression. The non-zero values packer receives the 2N non-zero-value bit streams and forms at least one first group of packed non-zero values.
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公开(公告)号：US20210144327A1
公开(公告)日：2021-05-13
申请号：US17093632
申请日：2020-11-09
摘要： Using the same image sensor to capture a two-dimensional (2D) image and three-dimensional (3D) depth measurements for a 3D object. A laser point-scans the surface of the object with light spots, which are detected by a pixel array in the image sensor to generate the 3D depth profile of the object using triangulation. Each row of pixels in the pixel array forms an epipolar line of the corresponding laser scan line. Timestamping provides a correspondence between the pixel location of a captured light spot and the respective scan angle of the laser to remove any ambiguity in triangulation. An Analog-to-Digital Converter (ADC) in the image sensor operates as a Time-to-Digital (TDC) converter to generate timestamps. A timestamp calibration circuit is provided on-board to record the propagation delay of each column of pixels in the pixel array and to provide necessary corrections to the timestamp values generated during 3D depth measurements.
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公开(公告)号：US20200234099A1
公开(公告)日：2020-07-23
申请号：US16842700
申请日：2020-04-07
发明人： Lei WANG , Ilia OVSIANNIKOV
摘要： A processor includes a register, a non-zero weight value selector and a multiplier. The register holds a first group of weight values and a second group of weight values. Each group of weight values includes at least one weight value, and each weight value in the first group of weight values corresponding to a weight value in the second group of weight values. The non-zero weight value selector selects a non-zero weight value from a weight value in the first group of weight values or a non-zero weight value in the second group of weight values that corresponds to the weight value in the first group of weight values. The multiplier multiplies the selected non-zero weight value and an activation value that corresponds to the selected non-zero weight value to form an output product value.
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