公开(公告)号：US20230274454A1

公开(公告)日：2023-08-31

申请号：US18019697

申请日：2020-08-03

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Stephen Bernard Pollard ,  Fraser John Dickin ,  Guy de Warrenne Bruce Adams ,  Faisal Azhar

IPC: G06T7/593 ,  G01B11/25

CPC classification number: G06T7/593 ,  G01B11/2504 ,  G01B11/2522 ,  G06T2207/10028

Abstract: Disclosed herein are methods, apparatus, and computer program code for determining a correcting mapping, comprising: locating a test object having a known linear dimension at a plurality of positions within a volume; at each of the plurality of positions, capturing a three-dimensional scan of the test object using a three-dimensional imaging device; and determining a difference between the known linear dimension and the linear dimension as obtained from the captured scan; and determining a correction mapping for the volume based on the determined differences, the correction mapping indicating variation from an expected location of the location as captured by the imaging device.

公开(公告)号：US20160127128A1

公开(公告)日：2016-05-05

申请号：US14755125

申请日：2015-06-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Liqun Chen ,  Fraser John Dickin ,  Martin Sadler ,  Chris I. Dalton ,  Nigel Edwards ,  Simon Kai-Ying Shiu ,  Boris Balacheff

IPC: H04L9/08 ,  G06F21/72 ,  H04L9/32

CPC classification number: H04L9/0897 ,  G06F21/72 ,  H04L9/0866 ,  H04L9/3073 ,  H04L9/3247

Abstract: An electronic device for management of cryptographic keys, and a corresponding method implemented in a computing device comprising a physical processor, transmit feature data of the device to a key generation module, wherein the feature data comprises information corresponding to an identifier or an attribute of the device, and receive, by the device from the key generation module, a digital signature of the transmitted feature data. The device installs the received digital signature as a cryptographic private key for communication, and performs a cryptographic operation using the installed digital signature as the cryptographic private key.

Abstract translation: 一种用于管理加密密钥的电子设备，以及在包括物理处理器的计算设备中实现的相应方法，将设备的特征数据发送到密钥生成模块，其中，特征数据包括与标识符或属性对应的信息 设备，并且由密钥生成模块的设备接收所发送的特征数据的数字签名。 设备将接收到的数字签名作为加密专用密钥进行安装，进行通信，并使用安装的数字签名作为密码私钥进行密码操作。

公开(公告)号：US20230228560A1

公开(公告)日：2023-07-20

申请号：US17777607

申请日：2019-11-19

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Faisal Azhar ,  Guy De Warrenne Bruce Adams ,  Stephen Bernard Pollard ,  Fraser John Dickin

IPC: G01B11/08

CPC classification number: G01B11/08 ,  B25J9/16

Abstract: A method comprising scanning a test artefact at plurality of locations relative to the scanner to create test data. Determining a measured dimension of the test artefact in each of the plurality of locations based on the test data. Determining an error between the measured dimension and an actual dimension of the test artefact in each of the plurality of locations to create error data. Determining from the error data a preferred region relative to the scanner for scanning and adjusting a position of the scanner relative to an object to be scanned so the object is within the preferred region.

公开(公告)号：US20220349708A1

公开(公告)日：2022-11-03

申请号：US17774189

申请日：2019-11-19

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Fraser John Dickin ,  Stephen Bernard Pollard ,  Guy De Warrenne Bruce Adams ,  Faisal Azhar

IPC: G01B11/25

Abstract: A system comprising a scanner to scan an object and a controller. The controller can cause an object to be moved to a plurality of locations to be scanned by the scanner. At each location the controller can cause the scanner to scan the object to create scan data and can cause a reference device to create reference data relating to the object. The scan data can be processed to create scan position data indicative of a measured scan position of the object and can cause the reference data to be processed to create reference position data indicative of a measured reference position of the object. The controller can also cause the generation of error data indicative of a position error in the scan data at each of the plurality of locations based on the scan position data and the reference position data.

公开(公告)号：US20220074738A1

公开(公告)日：2022-03-10

申请号：US17414748

申请日：2019-04-11

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Stephen Bernard Pollard ,  Fraser John Dickin ,  Guy de Warrenne Bruce Adams

IPC: G01B11/25 ,  B33Y30/00

Abstract: Disclosed are a 3D scanner, an additive manufacturing system and an apparatus and method for identifying features of a 3D object manufactured in such a system. An apparatus comprises an optical projection assembly comprising a light source and an optical grating, for illuminating an object with first and second light patterns having different spatial frequencies, wherein the optical projection assembly provides a first light pattern in a first configuration of the optical projection assembly and provides a second light pattern in a second configuration of the optical projection assembly. An image capturing apparatus is used to capture images corresponding to reflections of the first and second light patterns from the illuminated object, and a processing unit is used to identify, from the captured reflections of the first and second light patterns, the effects of distortions in the reflected light patterns corresponding to features of the illuminated object.