公开(公告)号：US10999452B2

公开(公告)日：2021-05-04

申请号：US16604154

申请日：2018-01-25

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

Inventor： Richard E Maggard ,  Mark Shaw ,  Katelyn Christene Morse ,  Jan Allebach ,  Zuguang Xiao ,  Shaoyuan Xu

IPC: H04N1/00 ,  H04N1/60

Abstract: Pixel blocks of a user-generated print job raster page are clustered into raster color clusters, and pixel blocks of a corresponding scanned page are clustered into scanned color clusters. For each raster color cluster, if a color difference between the cluster and a corresponding scanned color cluster is greater than a threshold, color fading of the cluster is determined from simulated depletion of each colorant of a printing device, and a likely depleted colorant is determined based on the corresponding scanned color cluster and the determined color fading. A most likely depleted colorant is determined from the likely depleted colorant predicted for each raster color cluster for which the determined color difference is greater than the threshold.

公开(公告)号：US11875603B2

公开(公告)日：2024-01-16

申请号：US17425769

申请日：2019-04-30

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Shaoyuan Xu ,  Qian Lin ,  Jan Allebach

IPC: G06V40/16 ,  G06V10/70 ,  G06V40/18 ,  G06V10/74

CPC classification number: G06V40/175 ,  G06V10/70 ,  G06V10/761 ,  G06V40/161 ,  G06V40/165 ,  G06V40/171 ,  G06V40/176 ,  G06V40/18

Abstract: An example system includes a landmark engine to detect a facial landmark in an image of a face. The system includes a comparison engine to determine a difference between the facial landmark in the image and a facial landmark of a neutral face. The system also includes an action engine to determine whether a facial action unit occurred based on whether the difference satisfies a condition.

公开(公告)号：US20220139107A1

公开(公告)日：2022-05-05

申请号：US17434527

申请日：2019-06-28

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Yang Cheng ,  Xiaoyu Xiang ,  Shaoyuan Xu ,  Qian Lin ,  Jan Philip Allebach

IPC: G06V40/16 ,  G06T7/73

Abstract: An example system includes: a landmark detection engine to detect landmark positions of landmarks in images based on facial detection; an optical flow landmark engine to determine the landmark positions in the images based on optical flow of the landmarks between the images; a landmark difference engine to determine, for a landmark in a given image: a distance between a detected landmark position and an optical flow landmark position of the landmark; and a weighted landmark determination engine to determine, for a first and second image, a position for the landmark in the second image based on: a respective detected landmark position and a respective optical flow position of the landmark in the second image; and respective distances, determined with the landmark difference engine, between a first detected landmark position of the landmark in the first image and respective optical flow landmark positions for the first and second images.

公开(公告)号：US11954905B2

公开(公告)日：2024-04-09

申请号：US17434527

申请日：2019-06-28

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Yang Cheng ,  Xiaoyu Xiang ,  Shaoyuan Xu ,  Qian Lin ,  Jan Philip Allebach

IPC: G06V10/82 ,  G06T7/73 ,  G06V10/764 ,  G06V40/16

CPC classification number: G06V10/82 ,  G06T7/74 ,  G06V10/764 ,  G06V40/165 ,  G06V40/171 ,  G06V40/174 ,  G06V40/176 ,  G06T2207/20224 ,  G06T2207/30201

Abstract: An example system includes: a landmark detection engine to detect landmark positions of landmarks in images based on facial detection; an optical flow landmark engine to determine the landmark positions in the images based on optical flow of the landmarks between the images; a landmark difference engine to determine, for a landmark in a given image: a distance between a detected landmark position and an optical flow landmark position of the landmark; and a weighted landmark determination engine to determine, for a first and second image, a position for the landmark in the second image based on: a respective detected landmark position and a respective optical flow position of the landmark in the second image; and respective distances, determined with the landmark difference engine, between a first detected landmark position of the landmark in the first image and respective optical flow landmark positions for the first and second images.

公开(公告)号：US20220114838A1

公开(公告)日：2022-04-14

申请号：US17425769

申请日：2019-04-30

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Shaoyuan Xu ,  Qian Lin ,  Jan Allebach

IPC: G06V40/16 ,  G06V10/24 ,  G06V10/70 ,  G06V40/18

Abstract: An example system includes a landmark engine to detect a facial landmark in an image of a face. The system includes a comparison engine to determine a difference between the facial landmark in the image and a facial landmark of a neutral face. The system also includes an action engine to determine whether a facial action unit occurred based on whether the difference satisfies a condition.